jdbc使用PreparedStatement批量插入数据的方法

CREATE TABLE goods(
id INT PRIMARY KEY AUTO_INCREMENT,
NAME VARCHAR(20)
);

Connection conn = JDBCUtils.getConnection();
Statement st = conn.createStatement();
for(int i = 1;i <= 20000;i++){
 String sql = "insert into goods(name) values('name_' + "+ i +")";
 st.executeUpdate(sql);
}

long start = System.currentTimeMillis();
  
Connection conn = JDBCUtils.getConnection();
  
String sql = "insert into goods(name)values(?)";
PreparedStatement ps = conn.prepareStatement(sql);
for(int i = 1;i <= 20000;i++){
 ps.setString(1, "name_" + i);
 ps.executeUpdate();
}
  
long end = System.currentTimeMillis();
System.out.println("花费的时间为：" + (end - start));//82340
JDBCUtils.closeResource(conn, ps);

/*
 * 修改1： 使用 addBatch() / executeBatch() / clearBatch()
 * 修改2：mysql服务器默认是关闭批处理的，我们需要通过一个参数，让mysql开启批处理的支持。
 *    ?rewriteBatchedStatements=true 写在配置文件的url后面
 * 修改3：使用更新的mysql 驱动：mysql-connector-java-5.1.37-bin.jar
 * 
 */
@Test
public void testInsert1() throws Exception{
 long start = System.currentTimeMillis();
  
 Connection conn = JDBCUtils.getConnection();
  
 String sql = "insert into goods(name)values(?)";
 PreparedStatement ps = conn.prepareStatement(sql);
  
 for(int i = 1;i <= 1000000;i++){
  ps.setString(1, "name_" + i);
   
  //1.“攒”sql
  ps.addBatch();
  if(i % 500 == 0){
   //2.执行
   ps.executeBatch();
   //3.清空
   ps.clearBatch();
  }
 }
  
 long end = System.currentTimeMillis();
 System.out.println("花费的时间为：" + (end - start));//20000条：625                                                                         //1000000条:14733  
  
 JDBCUtils.closeResource(conn, ps);
}

/*
* 层次四：在层次三的基础上操作
* 使用Connection 的 setAutoCommit(false)  /  commit()
*/
@Test
public void testInsert2() throws Exception{
 long start = System.currentTimeMillis();
  
 Connection conn = JDBCUtils.getConnection();
  
 //1.设置为不自动提交数据
 conn.setAutoCommit(false);
  
 String sql = "insert into goods(name)values(?)";
 PreparedStatement ps = conn.prepareStatement(sql);
  
 for(int i = 1;i <= 1000000;i++){
  ps.setString(1, "name_" + i);
   
  //1.“攒”sql
  ps.addBatch();
   
  if(i % 500 == 0){
   //2.执行
   ps.executeBatch();
   //3.清空
   ps.clearBatch();
  }
 }
  
 //2.提交数据
 conn.commit();
  
 long end = System.currentTimeMillis();
 System.out.println("花费的时间为：" + (end - start));//1000000条:4978 
  
 JDBCUtils.closeResource(conn, ps);
}