数据库的批量操作

package com.mescs.baseinfo.utils;

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * 
 * 类名：DatabaseUtil  <br />
 *
 * 功能：数据库操作
 *
 * @author 田宇鹏 <br />
 * 创建时间：Sep 10, 2018 10:55:02 AM  <br />
 * @version Sep 10, 2018
 */
public class DatabaseUtil {
    private final static Logger LOGGER = LoggerFactory.getLogger(DatabaseUtil.class);

    private static final String DRIVER = "org.firebirdsql.jdbc.FBDriver";
    private static final String URL = "jdbc:firebirdsql:embedded:mescs.fdb?lc_ctype=UTF8";
    private static final String USERNAME = "root";
    private static final String PASSWORD = "root";
    
    private static final String SQL = "DELETE FROM ";// 数据库数据库表内容清空
    
    static {
        try {
            Class.forName(DRIVER);
        } catch (ClassNotFoundException e) {
            LOGGER.error("数据库驱动加载失败===>>>", e);
        }
    }

    /**
     * 获取数据库连接
     *
     * @return
     */
    public static Connection getConnection() {
        Connection conn = null;
        try {
            conn = DriverManager.getConnection(URL, USERNAME, PASSWORD);
        } catch (SQLException e) {
            LOGGER.error("数据库连接失败===>>>", e);
        }
        return conn;
    }

    /**
     * 关闭数据库连接
     * @param conn
     */
    public static void closeConnection(Connection conn) {
        if(conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                LOGGER.error("数据库关闭失败===>>>", e);
            }
        }
    }

    /**
     * 获取数据库下的所有表名
     */
    public static List<String> getTableNames() {
        List<String> tableNames = new ArrayList<String>();
        Connection conn = getConnection();
        ResultSet rs = null;
        try {
            //获取数据库的元数据
            DatabaseMetaData db = conn.getMetaData();
            //从元数据中获取到所有的表名
            rs = db.getTables(null, null, null, new String[] { "TABLE" });
            while(rs.next()) {
                tableNames.add(rs.getString(3));
            }
        } catch (SQLException e) {
            LOGGER.error("获取数据库表名失败===>>>", e);
        } finally {
            try {
                rs.close();
                closeConnection(conn);
            } catch (SQLException e) {
                LOGGER.error("关闭数据库失败===>>>", e);
            }
        }
        return tableNames;
    }

    /*
     * 清空数据库表
     */
    public static void emptyDatabase() throws SQLException {
        List<String> tableNames = getTableNames();
        Connection conn = getConnection();
        PreparedStatement pStemt = null;
        for(String table:tableNames){
            if(!table.equals("SYSPARAM") && !table.equals("T_CLEAR_DATA")){
                String tableSql = SQL + table;
                try {
                    pStemt = conn.prepareStatement(tableSql);
                    Statement stmt=conn.createStatement();
                    stmt.executeUpdate(tableSql);
                } catch (SQLException e) {
                    e.printStackTrace();
                }
            }
        }
        conn.close();
    }
}