JDBC向数据库中插入数据

新建数据库，并插入相关数据。

 create database bbs;

 use bbs;

 create table article
 (
 id int primary key auto_increment,
 pid int,
 rootid int,
 title varchar(255),
 cont text,
 pdate datetime,
 isleaf int
 );

 insert into article values (null, 0, 1, '蚂蚁大战大象', '蚂蚁大战大象', now(), 1);
 insert into article values (null, 1, 1, '大象被打趴下了', '大象被打趴下了',now(), 1);
 insert into article values (null, 2, 1, '蚂蚁也不好过','蚂蚁也不好过', now(), 0);
 insert into article values (null, 2, 1, '瞎说', '瞎说', now(), 1);
 insert into article values (null, 4, 1, '没有瞎说', '没有瞎说', now(), 0);
 insert into article values (null, 1, 1, '怎么可能', '怎么可能', now(), 1);
 insert into article values (null, 6, 1, '怎么没有可能', '怎么没有可能', now(), 0);
 insert into article values (null, 6, 1, '可能性是很大的', '可能性是很大的', now(), 0);
 insert into article values (null, 2, 1, '大象进医院了', '大象进医院了', now(), 1);
 insert into article values (null, 9, 1, '护士是蚂蚁', '护士是蚂蚁', now(), 0);

　为每一张表建立一个实体类，实体类中的属性对应着表的字段名。

 package qddx.JDBC;
 import java.sql.*;
 public class bbsVo {

     private int id;
     private int pid;
     private int rootid;
     private String title;
     private String cont;
     private Timestamp pdate;
     private int isleaf;

     public int getId(){
         return id;
     }
     public void setId(int id){
         this.id = id;
     }

     public int getPid(){
         return pid;
     }
     public void setPid(int pid){
         this.pid = pid;
     }

     public int getRootid(){
         return rootid;
     }
     public void setRootid(int rootid){
         this.rootid = rootid;
     }

     public String getTitle(){
         return cont;
     }
     public void setCont(String title){
         this.title = title;
     }

     public String getCont(){
         return title;
     }
     public void setTitle(String cont){
         this.cont = cont;
     }
     public Timestamp getPdate(){
         return pdate;
     }
     public void setPdate(Timestamp pdate){
         this.pdate = pdate;
     }

     public int getIsleaf(){
         return isleaf;
     }
     public void setIsleaf(int isleaf){
         this.isleaf = isleaf;
     }

 }

插入数据

package qddx.JDBC;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.Timestamp;
import java.sql.*;
public class Addbbs {

    public void add(bbsVo vo){
        Connection conn = null;
         PreparedStatement pst = null;
         ResultSet rs = null;
         try{
         conn = JDBC_Connection.getConnection();
         String sql = "INSERT INTO ARTICLE(id,pid,rootid,title,cont,pdate,isleaf) values(?,?,?,?,?,?,?)";
         pst=conn.prepareStatement(sql);
         //把相应的参数 添加到pst对象中
         pst.setInt( 1, vo.getId());
         pst.setInt(2, vo.getPid());
         pst.setInt(3, vo.getRootid());
         pst.setString(4, vo.getTitle());
         pst.setString(5, vo.getCont());
         pst.setTimestamp(6, vo.getPdate());
         pst.setInt(7, vo.getIsleaf());
         //提交pst对象
         pst.executeUpdate();
         }catch(SQLException e){
             e.printStackTrace();
         }finally{
             JDBC_Connection.free(rs, conn, pst);//关闭数据库连接
         }
    }
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Addbbs addbbs = new Addbbs();
        bbsVo vo = new bbsVo();
        int id=13;
        int pid = 10;
        int rootid = 1;
        String title = "蚂蚁";
        String cont = "蚂蚁";
        java.util.Date date = new java.util.Date();
        Timestamp pdate = new Timestamp(date.getTime());
        int isleaf = 1;
        //设置要添加的变量值，放入bbsvo中
        vo.setId(id);
        vo.setPid(pid);
        vo.setRootid(rootid);
        vo.setTitle(cont);
        vo.setCont(title);
        vo.setIsleaf(isleaf);
        vo.setPdate(pdate);
        addbbs.add(vo);
    }

}