JAVA WEB快速入门之从编写一个基于SpringMVC框架…

 <localRepository>E:/LocalMvnRepositories</localRepository>

  <mirror>
      <id>alimaven</id>
      <name>aliyun maven</name>
      <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
      <mirrorOf>central</mirrorOf>        
    </mirror>
  </mirrors>

mvn archetype:generate
-DgroupId=cn.zuowenjun.java
-DartifactId=mvnspringmvc2 
-DarchetypeArtifactId=maven-archetype-webapp 
-DinteractiveMode=false

	<dependencies>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.1.0</version>
		</dependency>
	</dependencies>

	<properties>
		<spring.version>5.1.3.RELEASE</spring.version>
	</properties>
	
	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.1.0</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spring.version}</version>
		</dependency>
	</dependencies>

<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>cn.zuowenjun.java</groupId>
	<artifactId>mvnspringmvc</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>mvnspringmvc Maven Webapp</name>
	<url>http://maven.apache.org</url>


	<properties>
		<spring.version>5.1.3.RELEASE</spring.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>
		<!-- JSP视图所需依赖 -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.1.0</version>
		</dependency>
		<dependency>
			<groupId>javax.servlet.jsp</groupId>
			<artifactId>jsp-api</artifactId>
			<version>2.2</version>
		</dependency>
		
		<!-- JSP JSTL所需依赖 -->
		<dependency>
			<groupId>javax.servlet.jsp.jstl</groupId>
			<artifactId>jstl-api</artifactId>
			<version>1.2</version>
			<exclusions>
				<exclusion>
					<groupId>javax.servlet</groupId>
					<artifactId>servlet-api</artifactId>
				</exclusion>
				<exclusion>
					<groupId>javax.servlet.jsp</groupId>
					<artifactId>jsp-api</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.glassfish.web</groupId>
			<artifactId>jstl-impl</artifactId>
			<version>1.2</version>
			<exclusions>
				<exclusion>
					<groupId>javax.servlet</groupId>
					<artifactId>servlet-api</artifactId>
				</exclusion>
				<exclusion>
					<groupId>javax.servlet.jsp</groupId>
					<artifactId>jsp-api</artifactId>
				</exclusion>
				<exclusion>
					<groupId>javax.servlet.jsp.jstl</groupId>
					<artifactId>jstl-api</artifactId>
				</exclusion>
			</exclusions>
		</dependency>

		<!-- springMVC所需依赖  -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		
		<!-- Spring JDBC【数据访问】所需依赖  -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>com.microsoft.sqlserver</groupId>
			<artifactId>mssql-jdbc</artifactId>
			<version>7.0.0.jre8</version>
		</dependency>
		
	</dependencies>
	<build>
		<finalName>mvnspringmvc</finalName>
	</build>
</project>

<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

	<display-name>Archetype Created Web Application</display-name>

	<servlet>
		<servlet-name>springmvc</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:springmvc-servlet.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<!-- Map all requests to the DispatcherServlet for handling -->
	<servlet-mapping>
		<servlet-name>springmvc</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:springmvc-servlet.xml</param-value>
	</context-param>

	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

	<!-- 解决中文请求乱码问题 -->
	<filter>
		<filter-name>CharacterEncoding</filter-name>
		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
		<init-param>
			<param-name>encoding</param-name>
			<param-value>UTF-8</param-value>
		</init-param>
		<init-param>
			<param-name>forceEncoding</param-name>
			<param-value>true</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>CharacterEncoding</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

	<!-- 定义默认首页，欢迎页 -->
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>

	<!-- 定义错误处理页面，此处只定义404，其余的通过@ControllerAdvice+@ExceptionHandler来处理 -->
	<error-page>
		<error-code>404</error-code>
		<location>/WEB-INF/errors/notfound.jsp</location>
	</error-page>
</web-app>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc" 
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
		http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">

	<!-- 对包中的所有类进行扫描，以完成Bean创建和自动依赖注入的功能 ,多个包名用逗号分隔 -->
	<context:component-scan
		base-package="cn.zuowenjun.java.mvc"></context:component-scan>
	
	<mvc:annotation-driven>
<!-- 		<mvc:argument-resolvers></mvc:argument-resolvers> -->
<!-- 		<mvc:async-support></mvc:async-support> -->
<!-- 		<mvc:message-converters></mvc:message-converters> -->
<!-- 		<mvc:path-matching/> -->
<!-- 		<mvc:return-value-handlers></mvc:return-value-handlers> -->
	</mvc:annotation-driven>
	
	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/jsp/" />
		<property name="suffix" value=".jsp" />
	</bean>
	
	<!-- 配置静态资源，如html，图片,js,css等,多个资源位置可用逗号分隔 -->
	 <mvc:resources mapping="/pages/**" location="/WEB-INF/pages/" />
	
	<!-- 可配置读取外部配置文件，如果有配置jdbc.properties，则下面的dataSource的相关property可以使用${xxx}占位符，这里不演示 -->
	<!--<context:property-placeholder location="classpath:jdbc.properties" /> -->
	
	<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<property name="driverClassName"  value="com.microsoft.sqlserver.jdbc.SQLServerDriver"></property>
		<property name="url" value="jdbc:sqlserver://ip:port;DatabaseName=testDB"></property>
		<property name="username" value="dbuser"></property>
		<property name="password" value="password"></property>
	</bean>
	
	
	
	<!-- 配置事务管理器  -->
    <bean id="txManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
    
<!--     事务扫描开始(开启@Tranctional) 此示例暂不启用-->
<!--     <tx:annotation-driven transaction-manager="txManager" /> -->
	
</beans>

//Post.java
package cn.zuowenjun.java.mvc.model;

import java.util.Date;

public class Post {
	private int id;
	private String title;
	private String content;
	private String author;
	private Date createTime;
	
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	
	public String getTitle() {
		return title;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	
	public String getContent() {
		return content;
	}
	public void setContent(String content) {
		this.content = content;
	}
	
	public String getAuthor() {
		return author;
	}
	public void setAuthor(String author) {
		this.author = author;
	}
	
	public Date getCreateTime() {
		return createTime;
	}
	public void setCreateTime(Date createTime) {
		this.createTime = createTime;
	}
	
	

}



//PostComment.java

package cn.zuowenjun.java.mvc.model;

import java.util.Date;

public class PostComment {
	private int id;
	private int postid;
	private String content;
	private String createby;
	private Date createTime;
	
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	
	public int getPostid() {
		return postid;
	}
	public void setPostid(int postid) {
		this.postid = postid;
	}
	
	public String getContent() {
		return content;
	}
	public void setContent(String content) {
		this.content = content;
	}
	
	public String getCreateby() {
		return createby;
	}
	public void setCreateby(String createby) {
		this.createby = createby;
	}
	
	public Date getCreateTime() {
		return createTime;
	}
	public void setCreateTime(Date createTime) {
		this.createTime = createTime;
	}
	
	

}

//PostDao.java
package cn.zuowenjun.java.mvc.dao;

import java.util.Date;
import java.util.List;

import cn.zuowenjun.java.mvc.model.Post;

public interface PostDao {
	Post get(int id);
	List<Post> getList(Date frmDate,Date toDate);
	int create(Post post);
	Boolean delete(int id);
	Boolean update(Post post);
	
}


//PostCommentDao.java
package cn.zuowenjun.java.mvc.dao;

import java.util.List;

import cn.zuowenjun.java.mvc.model.PostComment;

public interface PostCommentDao {
	PostComment get(int id);
	List<PostComment> getList(int postId);
	Boolean create(PostComment postCmmt);
	Boolean delete(int id);
	Boolean update(PostComment postCmmt);
}

package cn.zuowenjun.java.mvc.dao.impl;

import javax.sql.DataSource;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;

public abstract class BaseDao {
	private JdbcTemplate jdbcTemplateObj;
	private NamedParameterJdbcTemplate namedParamJdbcTemplate;
	
	public BaseDao(DataSource dataSource) {
		this.jdbcTemplateObj=new JdbcTemplate(dataSource);
		this.namedParamJdbcTemplate=new NamedParameterJdbcTemplate(dataSource);
	}
	
	protected JdbcTemplate getJdbcTemplate() {
		return this.jdbcTemplateObj;
	}
	
	protected NamedParameterJdbcTemplate getNamedParameterJdbcTemplate() {
		return this.namedParamJdbcTemplate;
	}
	
	
}

package cn.zuowenjun.java.mvc.dao.impl;

import java.util.*;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.namedparam.*;
import org.springframework.jdbc.support.*;
import org.springframework.transaction.*;
import org.springframework.transaction.support.*;

import cn.zuowenjun.java.mvc.dao.*;
import cn.zuowenjun.java.mvc.model.Post;

public class PostDaoImpl extends BaseDao implements PostDao {

	private PlatformTransactionManager transactionManager;
	
	@Autowired
	public PostDaoImpl(DataSource dataSource,PlatformTransactionManager transactionManager) {
		super(dataSource);
		this.transactionManager=transactionManager;
	}

	@Override
	public Post get(int id) {
		String sql="select * from TA_TestPost where id=:id";
		MapSqlParameterSource mapSqlParameterSource = new MapSqlParameterSource();
				mapSqlParameterSource.addValue("id", id);
		return this.getNamedParameterJdbcTemplate().queryForObject(sql, mapSqlParameterSource,new BeanPropertyRowMapper<>(Post.class));
	}

	@Override
	public List<Post> getList(Date frmDate, Date toDate) {
		String sql="select * from TA_TestPost where createTime between :frmDate to :toDate";
		Map<String, Object> paramMap = new HashMap<>();
		paramMap.put("frmDate", frmDate);
		paramMap.put("toDate", toDate);
		
		return this.getNamedParameterJdbcTemplate().query(sql, paramMap,new BeanPropertyRowMapper<>(Post.class));
	}

	@Override
	public int create(Post post) {
		String sql="insert into TA_TestPost(title, content, author, createTime) values(:title,:content,:author,getdate())";
		BeanPropertySqlParameterSource beanPropParam=new BeanPropertySqlParameterSource(post);
        KeyHolder keyHolder = new GeneratedKeyHolder();
        
		int r= this.getNamedParameterJdbcTemplate().update(sql, beanPropParam, keyHolder);
		if(r>0) {
			System.out.println("create is ok!");
			return keyHolder.getKey().intValue();
		}
		else {
			System.out.println("create is failed!");
			return -1;
		}
	}

	@Override
	public Boolean delete(int id) {
		TransactionDefinition def = new DefaultTransactionDefinition();
	    TransactionStatus status = transactionManager.getTransaction(def);
		try {
			Map<String, Object> paramMap = new HashMap<>();
			paramMap.put("postid",id);
			NamedParameterJdbcTemplate namedJdbcTemplate=this.getNamedParameterJdbcTemplate();
			namedJdbcTemplate.update("delete from TA_TestPost where id=:postid",paramMap);
			namedJdbcTemplate.update("delete from TA_TestPostComment where postid=:postid", paramMap);
			transactionManager.commit(status);
			
			System.out.println("delete is ok!");
			
			return true;
			 
		}catch(DataAccessException daEx) {
			System.out.printf("delete is failed,Exception:%s",daEx.getMessage());
			transactionManager.rollback(status);
			return false;
		}
	}

	@Override
	public Boolean update(Post post) {
		String sql="update TA_TestPost set title=:title,content=:content,author=:author,createTime=getdate() where id=:id";
		BeanPropertySqlParameterSource beanPropParam=new BeanPropertySqlParameterSource(post);
		int r= this.getNamedParameterJdbcTemplate().update(sql, beanPropParam);
		if(r>0) {
			System.out.println("update is ok!");
			return true;
		}
		else {
			System.out.println("update is failed!");
			return false;
		}
	}

}

package cn.zuowenjun.java.mvc.dao.impl;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.RowMapper;

import cn.zuowenjun.java.mvc.dao.PostCommentDao;
import cn.zuowenjun.java.mvc.model.PostComment;
import cn.zuowenjun.java.mvc.model.mapper.PostCommentMapper;

public class PostCommentDaoImpl extends BaseDao implements PostCommentDao {

	@Autowired
	public PostCommentDaoImpl(DataSource dataSource) {
		super(dataSource);
		// TODO Auto-generated constructor stub
	}

	@Override
	public PostComment get(int id) {
		String sql = "select * from TA_TestPostComment where id=?";

		// 第一种：基于定义好的实现了RowMapper的PostCommentMapper实例
		// return this.getJdbcTemplate().queryForObject(sql,new Object[] {id},new
		// PostCommentMapper());

		// 第二种：直接使用匿名内部类（可以理解为与C#的委托类型）
//		return this.getJdbcTemplate().queryForObject(sql,new Object[]{id},new RowMapper<PostComment>() {
//
//			@Override
//			public PostComment mapRow(ResultSet rs, int rowNum) throws SQLException {
//				PostComment model=new PostComment();
//				model.setId(rs.getInt("id"));
//				model.setPostid(rs.getInt("postid"));
//				model.setContent(rs.getString("content"));
//				model.setCreateby(rs.getString("createby"));
//				model.setCreateTime(rs.getDate("createtime"));
//				return model;
//			}
//		});

		// 第三种：直接使用Lambda表达式，这个与C#lambda就比较像了，因为JAVA抄自C#
		return this.getJdbcTemplate().queryForObject(sql, new Object[] { id }, (rs, i) -> {
			PostComment model = new PostComment();
			model.setId(rs.getInt("id"));
			model.setPostid(rs.getInt("postid"));
			model.setContent(rs.getString("content"));
			model.setCreateby(rs.getString("createby"));
			model.setCreateTime(rs.getDate("createtime"));
			return model;
		});

	}

	@Override
	public List<PostComment> getList(int postId) {
		String sql = "select * from TA_TestPostComment where postid=?";
		return this.getJdbcTemplate().query(sql, new Object[] { postId }, new PostCommentMapper());
	}

	@Override
	public Boolean create(PostComment postCmmt) {
		String sql = "insert into TA_TestPostComment(id, postid, content, createby, createTime) values(?,?,?,?,?)";
		int r = this.getJdbcTemplate().update(sql, new Object[] { postCmmt.getId(), postCmmt.getPostid(),
				postCmmt.getContent(), postCmmt.getCreateby(), postCmmt.getCreateTime() });

		if (r > 0) {
			System.out.println("create is ok!");
			return true;
		} else {
			System.out.println("create is failed!");
			return false;
		}
	}

	@Override
	public Boolean delete(int id) {
		String sql = "delete from TA_TestPostComment where id=?";
		int r = this.getJdbcTemplate().update(sql, new Object[] { id });
		if (r > 0) {
			System.out.println("delete is ok!");
			return true;
		} else {
			System.out.println("delete is failed!");
			return false;
		}
	}

	@Override
	public Boolean update(PostComment postCmmt) {
		String sql = "update TA_TestPostComment set postid=?,content=?,createby=?,createTime=getdate() where id=?";
		int r = this.getJdbcTemplate().update(sql, (pss) -> {
			pss.setInt(1, postCmmt.getPostid());
			pss.setString(2, postCmmt.getContent());
			pss.setString(3, postCmmt.getCreateby());
			pss.setInt(4, postCmmt.getId());
		});

		if (r > 0) {
			System.out.println("update is ok!");
			return true;
		} else {
			System.out.println("update is failed!");
			return false;
		}

	}

}

package cn.zuowenjun.java.mvc.model.mapper;

import java.sql.ResultSet;
import java.sql.SQLException;

import org.springframework.jdbc.core.RowMapper;

import cn.zuowenjun.java.mvc.model.PostComment;

public class PostCommentMapper implements RowMapper<PostComment> {

	@Override
	public PostComment mapRow(ResultSet rs, int rowNum) throws SQLException {
		PostComment model=new PostComment();
		model.setId(rs.getInt("id"));
		model.setPostid(rs.getInt("postid"));
		model.setContent(rs.getString("content"));
		model.setCreateby(rs.getString("createby"));
		model.setCreateTime(rs.getDate("createtime"));
		
		return model;
	}

}

//PostService.java
package cn.zuowenjun.java.mvc.service;

import java.util.Date;
import java.util.List;

import cn.zuowenjun.java.mvc.model.Post;

public interface PostService {
	
	Post get(int id);
	List<Post> getList(Date frmDate,Date toDate);
	List<Post> getAll();
	int create(Post post);
	Boolean delete(int id);
	Boolean update(Post post);
}

//PostCommentService.java
package cn.zuowenjun.java.mvc.service;

import java.util.List;

import cn.zuowenjun.java.mvc.model.PostComment;

public interface PostCommentService {
	PostComment get(int id);
	List<PostComment> getList(int postId);
	Boolean create(PostComment postCmmt);
	Boolean delete(int id);
	Boolean update(PostComment postCmmt);
}

//UserService .java
package cn.zuowenjun.java.mvc.service;

public interface UserService {
	String login(String uid,String pwd);
	String logout();
	String getLoginUserName();
}

//PostServiceImpl.java
package cn.zuowenjun.java.mvc.service.impl;

import java.security.*;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import cn.zuowenjun.java.mvc.model.Post;
import cn.zuowenjun.java.mvc.service.PostService;
import cn.zuowenjun.java.mvc.dao.*;

@Service
public class PostServiceImpl implements PostService {

	@Autowired
	private PostDao postDao;
	
	@Override
	public Post get(int id) {
		return postDao.get(id);
	}

	@Override
	public List<Post> getList(Date frmDate, Date toDate) {
		long frmDateVal=frmDate.getTime();
		long toDateVal=toDate.getTime();
		
		if(frmDateVal>toDateVal) {
			throw new InvalidParameterException("开始时间需<=结束时间");
		}
		return postDao.getList(frmDate, toDate);
	}
	
	@Override
	public List<Post> getAll() {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		try {
			return getList(sdf.parse("1900-1-1"), sdf.parse("2099-12-1"));
		} catch (ParseException e) {
			return null;
		}
	}
	

	@Override
	public int create(Post post) {
		String result=verifyModel(post,true);
		if(!result.isEmpty()) {
			throw new InvalidParameterException(result);
		}
		return postDao.create(post);
	}

	@Override
	public Boolean delete(int id) {
		return postDao.delete(id);
	}

	@Override
	public Boolean update(Post post) {
		String result=verifyModel(post,true);
		if(!result.isEmpty()) {
			throw new InvalidParameterException(result);
		}
		return postDao.update(post);
	}
	
	private String verifyModel(Post post,Boolean isNew) {
		StringBuilder errMsgBuilder=new StringBuilder();
		
		if(!isNew && post.getId()<=0) {
			errMsgBuilder.append("ID不能为空！");
		}
		
		if(post.getTitle().trim().isEmpty()) {
			errMsgBuilder.append("标题不能为空！");
		}
		
		if(post.getContent().trim().isEmpty()) {
			errMsgBuilder.append("内容不能为空！");
		}
		
		if(post.getAuthor().trim().isEmpty()) {
			errMsgBuilder.append("作者不能为空！");
		}
		
		return errMsgBuilder.toString();
	}
}

//PostCommentServiceImpl.java
package cn.zuowenjun.java.mvc.service.impl;

import java.security.InvalidParameterException;
import java.util.Date;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import cn.zuowenjun.java.mvc.dao.PostCommentDao;
import cn.zuowenjun.java.mvc.model.PostComment;
import cn.zuowenjun.java.mvc.service.PostCommentService;

@Service
public class PostCommentServiceImpl implements PostCommentService {

	@Autowired
	private PostCommentDao postCommentDao;
	
	@Override
	public PostComment get(int id) {
		return postCommentDao.get(id);
	}

	@Override
	public List<PostComment> getList(int postId) {
		return postCommentDao.getList(postId);
	}

	@Override
	public Boolean create(PostComment postCmmt) {
		String result=verifyModel(postCmmt,true);
		if(!result.isEmpty()) {
			throw new InvalidParameterException(result);
		}
		postCmmt.setCreateTime(new Date());
		return postCommentDao.create(postCmmt);
	}

	@Override
	public Boolean delete(int id) {
		return postCommentDao.delete(id);
	}

	@Override
	public Boolean update(PostComment postCmmt) {
		String result=verifyModel(postCmmt,false);
		if(!result.isEmpty()) {
			throw new InvalidParameterException(result);
		}
		
		return postCommentDao.update(postCmmt);
	}
	
	private String verifyModel(PostComment postCmmt,Boolean isNew) {
		StringBuilder errMsgBuilder=new StringBuilder();
		
		if(!isNew && postCmmt.getId()<=0) {
			errMsgBuilder.append("ID不能为空！");
		}
		
		if(postCmmt.getPostid()<=0) {
			errMsgBuilder.append("文章ID不能为空！");
		}
		
		if(postCmmt.getContent().trim().isEmpty()) {
			errMsgBuilder.append("内容不能为空！");
		}
		
		if(postCmmt.getCreateby().trim().isEmpty()) {
			errMsgBuilder.append("回复者不能为空！");
		}
		
		return errMsgBuilder.toString();
	}

}


//UserServiceImpl.java
package cn.zuowenjun.java.mvc.service.impl;

import cn.zuowenjun.java.mvc.service.UserService;
import java.util.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.springframework.stereotype.Service;
import org.springframework.web.context.request.*;

@Service
public class UserServiceImpl implements UserService {

	@Override
	public String login(String uid, String pwd) {
		if(uid.isEmpty() || pwd.isEmpty()) {
			return "用户名与密码都不能为空！";
		}
		
		ResourceBundle userRes= ResourceBundle.getBundle("user");
		String configUid= userRes.getString("user.userid");
		String configPwd=userRes.getString("user.password");
		
		if(configUid.equals(uid) && configPwd.equals(pwd)) {
			
			String configUName=userRes.getString("user.username");
			
			HttpSession session= getRequest().getSession();
			session.setAttribute("loginUid", uid);
			session.setAttribute("loginUname",configUName);
			return null;
		}else{
			return "用户名或密码不正确！";
		}
	}

	@Override
	public String logout() {
		try {
			getRequest().getSession().removeAttribute("loginUid");
			return null;
		}catch(Exception ex) {
			return ex.getMessage();
		}
		
	}

	@Override
	public String getLoginUserName() {
		Object loginUnameObj= getRequest().getSession().getAttribute("loginUname");
		if(loginUnameObj==null) {
			return null;
		}else{
			return  (String)loginUnameObj;
		}
	}

	private HttpServletRequest getRequest() {
		HttpServletRequest  request= ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();
		return request;
	}
}

user.userid=admin
user.password=www.zuowenjun.cn.java
user.username=\u68A6\u5728\u65C5\u9014　　

package cn.zuowenjun.java.mvc.controller;

import java.io.IOException;
import java.security.InvalidParameterException;
import java.text.*;
import java.util.*;

import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.context.request.WebRequest;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import cn.zuowenjun.java.mvc.model.Post;
import cn.zuowenjun.java.mvc.model.PostComment;
import cn.zuowenjun.java.mvc.service.*;
/**
 * 
 * @author zuowenjun.cn
 *refer-mavendepconfig:https://blog.csdn.net/qq_29227939/article/details/52063869
 *refer-EL:http://www.cnblogs.com/dongfangshenhua/p/6731421.html
 */
@Controller
@RequestMapping("/blog")
public class BlogController {
	
	@Autowired
	private PostService postService;
	
	@Autowired
	private PostCommentService postCommentService;
	
	@RequestMapping()
	public ModelAndView list() {
		List<Post> postList= postService.getAll();
		ModelAndView mv=new ModelAndView();
		mv.addObject("posts",postList);
		mv.setViewName("bloglist");

		return mv;
	}
	
	@RequestMapping(path="/querylist",method=RequestMethod.POST)
	public ModelAndView list(@RequestParam(required=true) Date frmDate,@RequestParam(required=true) Date toDate,ModelAndView mv) {
		List<Post> postList=postService.getList(frmDate, toDate);
		mv.setViewName("bloglist");
		mv.addObject("posts",postList);
		return mv;
	}
	
	@RequestMapping("/post/{postid}")
	public String detail(@PathVariable String postid,ModelMap model) {
		int pid=Integer.parseInt(postid);
		model.put("post", postService.get(pid));
		model.put("comments", postCommentService.getList(pid));
		
		return "blogdetail";
	}

	
	@RequestMapping(path="/savecomment",method=RequestMethod.POST)
	public String saveComment(@ModelAttribute() PostComment postComment,RedirectAttributes redirectAttr) {
		String resultMsg="评论保存成功";
		if(!postCommentService.create(postComment)) {
			resultMsg="评论保存失败，请稍后重试";
		}
		redirectAttr.addFlashAttribute("msg", resultMsg);
		
		return "redirect:/blog/post/" + postComment.getPostid();
	}
	
	@RequestMapping(path="/editpost/{postid}",method=RequestMethod.GET)
	public ModelAndView editPost(@PathVariable(required=true) int postid) {
		ModelAndView mv=new ModelAndView();
		Post post=null;
		post=postService.get(postid);
		if(post==null) {
			throw new InvalidParameterException("无效的postid");
		}
		mv.addObject("post", post);
		mv.setViewName("blogedit");
		
		return mv;
	}
	
	@RequestMapping("/editpost")
	public String createPost(Map<String,Object> viewDataMap) {
		Post post=new Post();
		viewDataMap.put("post", post);
		return "blogedit";
	}
	
	@RequestMapping(path="/editpost",method=RequestMethod.POST)
	public String updatePost(@ModelAttribute("post") Post post,@RequestParam("doAction") String action,Model model,
			HttpServletResponse reponse) throws IOException {
		
		String result="保存成功！";
		if(action.equals("delete")) { //删除操作
			if(!postService.delete(post.getId())){
				result="删除失败，请重试！";
			}else {
				String jsResult="<script>alert('删除成功!');self.close();</script>";
				reponse.setContentType("text/html;charset=utf-8");
				reponse.getWriter().append(jsResult);
				return null;
			}
		}
		else { //编辑操作
			
			if(post.getId()<=0) { //新增博文逻辑
				int postId= postService.create(post);
				if(postId>0) {
					post.setId(postId);
				}else {
					result="保存失败，请重试！";
				}
			}else if(!postService.update(post)) { //更新博文逻辑
				result="保存失败，请重试！";
			}
		}
		model.addAttribute("result", result);
		return "blogedit";
	}

	
	
	@InitBinder
	public void initBinder(WebDataBinder binder, WebRequest request) {
		
		//转换日期
		DateFormat dateFormat=new SimpleDateFormat("yyyy-MM-dd");
		binder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, true));// CustomDateEditor为自定义日期编辑器
	}
	
}

package cn.zuowenjun.java.mvc.controller;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

import cn.zuowenjun.java.mvc.service.UserService;

/**
 * seeparambind:http://www.cnblogs.com/xiaoxi/p/5695783.html
 * 
 */
@Controller
@RequestMapping("/account")
public class AccountController {
	
	@Autowired
	private UserService userService;
	
	@RequestMapping("/signin")
	public String signIn() {
		return "signin";
	}
	
	@RequestMapping(path="/signin",method=RequestMethod.POST)
	public ModelAndView signIn(@RequestParam(required=true) String uid,@RequestParam(required=true) String pwd) {
		String loginResult=userService.login(uid, pwd);
		ModelAndView mv= new ModelAndView();
		if(loginResult==null || loginResult.isEmpty()) {//登录成功跳转
			mv.setViewName("redirect:/blog");
		}
		else {
			mv.setViewName("signin");
			mv.addObject("message",loginResult==null || loginResult.isEmpty()?"登录成功":"登录失败：" + loginResult);
		}
		
		return mv;
	}
	
	@RequestMapping("/signout")
	public void signOut(HttpServletRequest request, HttpServletResponse response) throws IOException {
		userService.logout();
		response.sendRedirect(request.getContextPath() + "/account/signin");
	}
}

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8" isELIgnored="false" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>梦在旅途演示博客-登录</title>
<style type="text/css">
	#loginbox{
		width:300px;
		margin:100px auto 0 auto;
		padding:50px;
		border:5px groove gray;
	}
	
	#loginbox div{
		margin:20px auto;
	}
	
	.txtcenter{
		text-align:center;
	}
</style>
</head>
<body>
	<form method="post">
	<div id="loginbox">
		<div><h3>欢迎，请登录！</h3></div>
		<div>用户ID：<input type="text" id="txtuid" name="uid" /></div>
		<div>密     码：<input type="password" id="txtpwd" name="pwd" /></div>
		<div>
			<input type="submit" id="btnSubmit" value="登 录" />
			<input type="reset" id="btnReset" value="重置" />
		</div>
	</div>
	</form>
	<div class="txtcenter">
		<c:if test="${message!=null}">
			<p>${message}</p>
		</c:if>
	</div>
	<p class="txtcenter">Copyright 2018  zuowj.cnblogs.com and zuowenjun.cn demo.</p>
</body>
</html>

<!-- bloglist.jsp -->
<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8" isELIgnored="false"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>博客列表</title>
</head>
<body>
	<div style="text-align: right;">
		<span>[ ${sessionScope.loginUid }(${sessionScope.loginUname }),
		<a href="${pageContext.request.contextPath}/account/signout">[退出]</a> ]</span>   
		<a href="${pageContext.request.contextPath}/blog/editpost" target="_blank">[ +发表博文 ]</a>
	</div>
	<div>
		<form method="post" action="${pageContext.request.contextPath }/blog/querylist">
			<fieldset>
				<legend>范围查询：</legend>
				<span>开始时间：</span> <input type="text" name="frmDate" 
					value="${param.frmDate }"
					placeholder="yyyy-MM-dd" />  
				<span>结束时间：</span> <input type="text"
					name="toDate" placeholder="yyyy-MM-dd"  
					value="${param.toDate}" />
				<button id="btnquery">查询</button>
			</fieldset>
		</form>
	</div>
	<c:choose>
		<c:when test="${posts!=null && posts.size()>0}">
			<c:forEach items="${posts}" var="item">
				<div>
					<h2>
						<a href="${pageContext.request.contextPath}/blog/post/${item.id }"
							target="_blank">${item.title}</a>  
							<a href="${pageContext.request.contextPath}/blog/editpost/${item.id }" 
							target="_blank" style="color:red;font-size:16px;">[修改]</a>
					</h2>
					<h4>
						作者：${item.author },时间：
						<fmt:formatDate value="${item.createTime}" pattern="yyyy-MM-dd" />
					</h4>
					<p>${item.content }</p>
				</div>
				<hr />
			</c:forEach>
		</c:when>
		<c:otherwise>
			<p style="color:red;">没有任何博客文章记录！</p>
		</c:otherwise>
	</c:choose>

</body>
</html>



<!-- blogedit.jsp -->
<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8" isELIgnored="false"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>博文详情：${post.title }</title>
</head>
<body>
	<div>
		<h2>
			${post.title}
		</h2>
		<h4>
			作者：${post.author },
			时间：<fmt:formatDate value="${post.createTime}" pattern="yyyy-MM-dd" />
		</h4>
		<p>${post.content }</p>
	</div>
	<hr/>
	<div>
		<c:choose>
			<c:when test="${comments!=null && fn:length(comments)>0 }">
				<c:forEach items="${ comments}" var="item">
					<div style="margin:10px auto;">
						<div style="border-bottom:solid 1px gray;margin-bottom:5px;">
						${item.createby } 回复于：<fmt:formatDate value="${item.createTime}" pattern="yyyy-MM-dd HH:mm" />
						</div>
						<div>
							${item.content }
						</div>
					</div>
				</c:forEach>
			</c:when>
			<c:otherwise>
				<p>暂无相关评论！</p>
			</c:otherwise>
		</c:choose>
		<div>
			<form method="post" action="../savecomment">
			<h3>发表新评论：</h3>
			<p>评论人：<input type="text" id="createby" name="createby" /></p>
			<p>评论内容：</p>
			<p><textarea rows="5" style="width:100%" id="content" name="content"></textarea>
			</p>
			<p>
				<button id="btnreply">提交评论</button>
				<input type="hidden" name="postid" value="${post.id }" />
			</p>
			</form>
			<div>
				<c:if test="${msg!=null}">
					<p>提交评论结果：${msg}</p>
				</c:if>
			</div>
		</div>
	</div>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8" isELIgnored="false" import="cn.zuowenjun.java.mvc.model.*" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>
<%-- ${post.id>0?"编辑"+ post.title:"新增博文" } --%>
<%
	Post post=(Post)request.getAttribute("post");
	if(post==null){
		out.print("post is null!");
		return;
	}
	
	if(post.getId()>0){
		out.print("编辑"+ post.getTitle());
	}else{
		out.print("新增博文");
	}
%>
</title>
</head>
<body>
	<form:form modelAttribute="post" method="POST" id="mainForm"
		action="${pageContext.request.contextPath }/blog/editpost">
		<div>文章标题：</div>
		<div>
			<form:input path="title" />
		</div>
		<div>作者：</div>
		<div>
			<form:input path="author" />
		</div>
		<div>文章内容：</div>
		<div>
			<form:textarea path="content" rows="10" style="width:100%;" />
		</div>
		<div>
			<button type="button" id="btnSave" data-action="update" onclick="javascript:doSubmit(this);">保存</button>
			<c:if test="${post.id>0 }">
			<button type="button" id="btnDelete" data-action="delete" style="color:red;" onclick="javascript:doSubmit(this);">删除</button>
			</c:if>
			<form:hidden path="id"/>
			<input type="hidden" name="doAction" id="_doAction" />
		</div>
	</form:form>
	<c:if test="${result!=null && fn:length(result)>0 }">
		<p>操作结果：${result}</p>
	</c:if>
	<script type="text/javascript">
		function doSubmit(btn){
			if(!confirm("你确定要" + btn.innerText +"吗？")){
				return false;
			}
			var actionVal=btn.getAttribute("data-action");
			//alert(actionVal);
			document.getElementById("_doAction").setAttribute("Value",actionVal);
			document.getElementById("mainForm").submit();
		}
	</script>
</body>
</html>

package cn.zuowenjun.java.mvc.service.impl;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;

public class LoginValidationInterceptor implements HandlerInterceptor {
	
	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
			throws Exception {
			
			String url = request.getRequestURI();
			if(url.indexOf("/signin")>0) {//登录页面无需验证登录,放行
				return true;
			}
			
			if(request.getSession().getAttribute("loginUid")==null) {//检测到未登录，转到登录页面
				response.sendRedirect(request.getContextPath() + "/account/signin");
				return false;
			}else {
				return true;
			}
	}
	
	//其余postHandle、afterCompletion方法未重写，直接使用默认实现，这与C#有区别（C#8.0中也会有默认实现）

}

	<!-- 配置拦截器 -->
	<mvc:interceptors>
		<mvc:interceptor>
			<mvc:mapping path="/**"/><!-- 拦截所有请求, /表示只拦截非JSP的请求，/*只拦截一级目录,/**拦截所有目录 -->
			<bean class="cn.zuowenjun.java.mvc.service.impl.LoginValidationInterceptor"></bean>
		</mvc:interceptor>
	</mvc:interceptors>

package cn.zuowenjun.java.mvc.service.impl;

import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;

import org.springframework.http.*;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.web.*;

/**
 * 
 * @author Zuowenjun
 *refer http://www.cnblogs.com/xinzhao/p/4902295.html
 */
@ControllerAdvice
public class WebExceptionHandler {
	

    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler(HttpMessageNotReadableException.class)
    public void handleHttpMessageNotReadableException(HttpMessageNotReadableException e) {
    }
    
    /**
     * 405 - Method Not Allowed
     */
    @ResponseStatus(HttpStatus.METHOD_NOT_ALLOWED)
    @ExceptionHandler(HttpRequestMethodNotSupportedException.class)
    public void handleHttpRequestMethodNotSupportedException(HttpRequestMethodNotSupportedException e) {
        
    }
    

    /**
     * 415 - Unsupported Media Type
     */
    @ResponseStatus(HttpStatus.UNSUPPORTED_MEDIA_TYPE)
    @ExceptionHandler(HttpMediaTypeNotSupportedException.class)
    public void handleHttpMediaTypeNotSupportedException(Exception e) {

    }

//    /**
//     * 500 - Internal Server Error
//     */
//    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
//    @ExceptionHandler(Exception.class)
//    public void handleException(Exception e) {
//    	
//    }
    
    // 创建ModleAndView，将异常和请求的信息放入到Model中，指定视图名字，并返回该ModleAndView
    @ExceptionHandler(Exception.class)
    public ModelAndView handleError(HttpServletRequest req, Exception exception) {
      ModelAndView mv = new ModelAndView();
      mv.addObject("exception", exception);
      mv.addObject("url", req.getRequestURL());
      mv.setViewName("error");
      
      return mv;
    }
}

<!--error.jsp-->
<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8" isELIgnored="false" import="java.io.*,java.lang.*" %>
<%!

	//获取完整堆栈信息
	String getStackTrace(Throwable throwable){
	StringWriter stringWriter=new StringWriter();
	PrintWriter printWriter=new PrintWriter(stringWriter);

	try {
		throwable.printStackTrace(printWriter);
		return stringWriter.toString();
	}finally {
		printWriter.close();
	}
}

%>
<%
	Exception ex= (Exception)request.getAttribute("exception");
%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>发生错误！</title>
</head>
<body>
	<h2>对不起，处理请求时发生错误！</h2>
	<p>错误信息：${exception.getMessage() }</p>
	<p>错误详情：<%=getStackTrace(ex) %></p>
	<p>请求URL：${url}</p>
	<p><a href="javascript:history.back();">[返回]</a></p>
</body>
</html>


<!--notfound.jsp-->
<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8" isELIgnored="false"%>
<%
	response.setStatus(200);
%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>404-页面不存在！</title>
</head>
<body>
	<div style="width: 600px; margin-top: 100px;margin-left:auto;margin-right:auto;">
		<p>你访问的资源不存在，可能被外星人吃掉了！</p>
		<p>请求URL：<span id="rawUrl"></span></p>
	</div>
	
	<script type="text/javascript">
		window.onload=function(){
			document.getElementById("rawUrl").innerHTML=window.location.href;
		};
	</script>
</body>
</html>