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java連接mysql數(shù)據(jù)庫實(shí)現(xiàn)單條插入和批量插入

更新時(shí)間：2019年08月30日 10:41:54 作者：靜遠(yuǎn)小和尚

這篇文章主要為大家詳細(xì)介紹了java連接mysql數(shù)據(jù)庫實(shí)現(xiàn)單條插入和批量插入，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

本文實(shí)例為大家分享了java連接mysql數(shù)據(jù)庫實(shí)現(xiàn)單條和批量插入的具體代碼，供大家參考，具體內(nèi)容如下

本文插入數(shù)據(jù)庫的數(shù)據(jù)來源：java + dom4j.jar提取xml文檔內(nèi)容

1、連接數(shù)據(jù)庫

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"; // 一般默認(rèn)3306，這里設(shè)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、加載驅(qū)動程序（反射的方法）
 try {
  Class.forName("com.mysql.jdbc.Driver");
 } catch (ClassNotFoundException e) {
  e.printStackTrace();
 }
 //2、連接數(shù)據(jù)庫
 try {
 connection=(Connection) DriverManager.
   getConnection(URL, USER,PASSWORD);//地址，用戶名，密碼
 } catch (SQLException e) {
  e.printStackTrace();
 }
 }
 public static Connection getConnection(){
 return connection;
 }
 
}

2、單條插入

package com.njupt.ymh;
/**
 * 單條插入數(shù)據(jù)
 */
 
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();//執(zhí)行給定的SQL語句，該語句可能返回多個(gè)結(jié)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); // 插入數(shù)據(jù)庫
 }
 }
 
}

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();
 
 
 /**
 * 支持批量插入數(shù)據(jù)
 * @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);// 關(guān)閉事務(wù)
  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();//執(zhí)行給定的SQL語句，該語句可能返回多個(gè)結(jié)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);  // 新聞列表
  if (count % sizenum == 0) {
   //System.out.println("ok");
   System.out.println("  " + count);
   operation.addNewsPaper(listPaper); //插入數(shù)據(jù)庫
   
   System.out.println(count);
   listPaper.clear();
  }
  } 
 }
 if (count %sizenum != 0) {
  operation.addNewsPaper(listPaper);
  System.out.println("zui hou ");
 } 
 }
}

通過實(shí)際測試，大概十萬級數(shù)據(jù)批量插入要不單條插入節(jié)省10分鐘左右時(shí)間。因?yàn)槊看螁螚l插入就要和數(shù)據(jù)庫建立一次連接，進(jìn)行一次日志更新。但是，如果批量插入過程中，批量的數(shù)據(jù)值有一條不符合格式就將導(dǎo)致本次批量插入整體失敗，因此需要對失敗情況進(jìn)行處理，或者對批量插入的數(shù)據(jù)進(jìn)行預(yù)處理，保證批量插入能夠成功。

以上就是本文的全部內(nèi)容，希望對大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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