本文实例为大家分享了java连接mysql数据库实现单条和批量插入的具体代码，供大家参考，具体内容如下
本文插入数据库的数据来源：java + dom4j.jar提取xml文档内容
1、连接数据库
package com.njupt.ymh; import java.sql.DriverManager;import java.sql.SQLException;import com.mysql.jdbc.Connection; public class Connect_MySQL { private static final String URL="jdbc:mysql://127.0.0.1:3306/news"; // 一般默认3306，这里设置成6666 （33060） MYSQL8 WMPNetworkSvc private static final String USER="root"; private static final String PASSWORD="12345"; private static Connection connection=null; static{ //1、加载驱动程序（反射的方法） try { Class.forName("com.mysql.jdbc.Driver"); } catch (ClassNotFoundException e) { e.printStackTrace(); } //2、连接数据库 try { connection=(Connection) DriverManager. getConnection(URL, USER,PASSWORD);//地址，用户名，密码 } catch (SQLException e) { e.printStackTrace(); } } public static Connection getConnection(){ return connection; } }
2、单条插入
package com.njupt.ymh;/** * 单条插入数据 */ import java.sql.SQLException;import java.util.List; import com.mysql.jdbc.Connection; public class OperationPaper { private static Connection connection=Connect_MySQL.getConnection(); public void addNewsPaper(NewsPaper newsPaper){//增 // connection = Connect_MySQL.getConnection(); String sql="insert into papertest (id, date, title, lead_pargraph, full_text) values(?, ?, ?, ?, ?)"; java.sql.PreparedStatement ptmt = null; try { ptmt = connection.prepareStatement(sql); } catch (SQLException e1) { e1.printStackTrace(); } try { ptmt.setLong(1, newsPaper.getID()); ptmt.setString(2, newsPaper.getDate()); ptmt.setString(3, newsPaper.getTitle()); ptmt.setString(4, newsPaper.getLead()); ptmt.setString(5, newsPaper.getfull()); ptmt.execute();//执行给定的SQL语句，该语句可能返回多个结果 } catch (SQLException e) { e.printStackTrace(); } } public static void main(String[] args) { OperationPaper operationPaper = new OperationPaper(); List<String> listFile = SearchFile.getAllFile("E:\\huadai\\1996\7\\21", false); // 文件列表 for (String string : listFile) { NewsPaper newsPaper = new NewsPaper(string); if (newsPaper.isUseful()) operationPaper.addNewsPaper(newsPaper); // 插入数据库 } } }
3、批量插入
package com.njupt.ymh; import java.sql.SQLException;import java.util.ArrayList;import java.util.List; import com.mysql.jdbc.Connection; public class OperaOnNewsPaper implements Cloneable{ private static Connection connection=Connect_MySQL.getConnection(); /** * 支持批量插入数据 * @param newsPaper */ public void addNewsPaper(ArrayList<NewsPaper> listNewsPaper){//增 String sql="insert into papertest (id, date, title, lead_pargraph, full_text) values(?, ?, ?, ?, ?)"; java.sql.PreparedStatement ptmt = null; try { connection.setAutoCommit(false);// 关闭事务 ptmt = connection.prepareStatement(sql); } catch (SQLException e2) { e2.printStackTrace(); } for (NewsPaper paperaper : listNewsPaper) { try { ptmt.setLong(1, paperaper.getID()); ptmt.setString(2, paperaper.getDate()); ptmt.setString(3, paperaper.getTitle()); ptmt.setString(4, paperaper.getLead()); ptmt.setString(5, paperaper.getfull()); ptmt.addBatch(); } catch (SQLException e) { e.printStackTrace(); } } try { ptmt.executeBatch();//执行给定的SQL语句，该语句可能返回多个结果 connection.commit(); } catch (SQLException e) { e.printStackTrace(); } } public static void main(String[] args) { OperaOnNewsPaper operation = new OperaOnNewsPaper(); List<String> listFile = SearchFile.getAllFile("E:\\huadai\\2007", false); // 文件列表 ArrayList<NewsPaper> listPaper = new ArrayList<>(); int count = 0; int sizenum = 1000; for (String string : listFile) { NewsPaper newsPaper = new NewsPaper(string); if (newsPaper.isUseful()) { count++; listPaper.add(newsPaper); // 新闻列表 if (count % sizenum == 0) { //System.out.println("ok"); System.out.println(" " + count); operation.addNewsPaper(listPaper); //插入数据库 System.out.println(count); listPaper.clear(); } } } if (count %sizenum != 0) { operation.addNewsPaper(listPaper); System.out.println("zui hou "); } }}
通过实际测试，大概十万级数据批量插入要不单条插入节省10分钟左右时间。因为每次单条插入就要和数据库建立一次连接，进行一次日志更新。但是，如果批量插入过程中，批量的数据值有一条不符合格式就将导致本次批量插入整体失败，因此需要对失败情况进行处理，或者对批量插入的数据进行预处理，保证批量插入能够成功。
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本文标题: java连接mysql数据库实现单条插入和批量插入
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