使用PreparedStatement接口实现增删改操作

直接上下代码：

 package com.learn.jdbc.chap04.sec02;

 import java.sql.Connection;
 import java.sql.PreparedStatement;

 import com.learn.jdbc.model.Album;
 import com.learn.jdbc.util.DbUtil;
 /**
  * 使用PreparedStatement接口实现增删改操作
  * @author Administrator
  *
  */
 public class Demo1 {

     private static DbUtil dbUtil=new DbUtil();
     /**
      * 使用PreparedStatement 预编译 添加数据
      * @param ab
      * @return
      * @throws Exception
      */
     private static int addAlbum(Album ab) throws Exception{
         Connection con=dbUtil.getCon(); // 获取连接
         String sql="insert into sp_album values (null,?,?,?)";
         PreparedStatement pstmt = con.prepareStatement(sql);
         pstmt.setString(1,ab.getName());
         pstmt.setInt(2,ab.getUid());
         pstmt.setLong(3,ab.getTime());
         int result = pstmt.executeUpdate();
         dbUtil.close(pstmt, con);
         return result;
     }

     public static void main(String[] args) throws Exception {
         int result = addAlbum(new Album("亲王", 6, System.currentTimeMillis()));
         if(result>0){
             System.out.println("数据插入成功！");
         }else{
             System.out.println("数据插入失败！");
         }
     }
 }

 package com.learn.jdbc.chap04.sec02;

 import java.sql.Connection;
 import java.sql.PreparedStatement;

 import com.learn.jdbc.model.Album;
 import com.learn.jdbc.util.DbUtil;
 /**
  * 使用PreparedStatement接口实现增删改操作
  * @author Administrator
  *
  */
 public class Demo2 {
     private static DbUtil dbUtil=new DbUtil();
     /**
      * 使用PreparedStatement 预编译 修改数据
      * @param ab
      * @return
      * @throws Exception
      */
     private static int updateAlbum(Album ab) throws Exception{
         Connection con=dbUtil.getCon(); // 获取连接
         String sql="update sp_album set name=?,uid=?,add_time=? where id=?";
         PreparedStatement pstmt = con.prepareStatement(sql);
         pstmt.setString(1,ab.getName());
         pstmt.setInt(2,ab.getUid());
         pstmt.setLong(3,ab.getTime());
         pstmt.setInt(4,ab.getId());
         int result = pstmt.executeUpdate();
         dbUtil.close(pstmt, con);
         return result;
     }

     public static void main(String[] args) throws Exception {
         int result = updateAlbum(new Album(9,"亲王66", 8, System.currentTimeMillis()));
         if(result>0){
             System.out.println("数据修改成功！");
         }else{
             System.out.println("数据修改失败！");
         }
     }
 }

 package com.learn.jdbc.chap04.sec02;

 import java.sql.Connection;
 import java.sql.PreparedStatement;

 import com.learn.jdbc.util.DbUtil;
 /**
  * 使用PreparedStatement接口实现增删改操作
  * @author Administrator
  *
  */
 public class Demo3 {
     private static DbUtil dbUtil=new DbUtil();

     /**
      * 使用PreparedStatement 预编译 删除数据
      * @param ab
      * @return
      * @throws Exception
      */
     private static int deleteAlbum(int id) throws Exception{
         Connection con=dbUtil.getCon(); // 获取连接
         String sql="delete from sp_album where id=?";
         PreparedStatement pstmt = con.prepareStatement(sql);
         pstmt.setInt(1,id);
         int result = pstmt.executeUpdate();
         dbUtil.close(pstmt, con);
         return result;
     }

     public static void main(String[] args) throws Exception{
         int result = deleteAlbum(15);
         if(result>0){
             System.out.println("数据删除成功！");
         }else{
             System.out.println("数据删除失败！");
         }
     }
 }