java连接mysql数据库实现单条插入和批量插入

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\\07\\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。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持自由互联。