可滚动的结果集
让结果集滚动起来
//=================================================
// File Name : JDBC20_demo
//------------------------------------------------------------------------------
// Author : Common
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.sql.*;
import java.text.SimpleDateFormat;
import java.util.Scanner;
//主类
//Function : JDBC20_demo
public class JDBC20_demo {
//定义MySQL的数据库驱动程序
public static final String DBDRIVER = "org.gjt.mm.mysql.Driver";
//定义MySQL数据库的连接地址
public static final String DBURL = "jdbc:mysql://localhost:3306/mysql_demo";
//MySQL数据库的连接用户名
public static final String DBUSER = "root";
//MySQL数据库的连接密码
public static final String DBPASS = "123456";
public static void main(String[] args) throws Exception{
// TODO 自动生成的方法存根
Connection conn = null; //数据库连接
PreparedStatement pstmt = null; //数据库操作
ResultSet rs = null; //保存结果集
String sql = "SELECT id,name,password,age,sex,birthday "+ " FROM user";
Class.forName(DBDRIVER); //加载驱动程序
//连接MySQL数据库时，要写上连接的用户名和密码
conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);
//实例化PreparedStatement
pstmt = conn.prepareStatement(sql,ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);
rs = pstmt.executeQuery(); //查询
System.out.println("第二条数据：");
rs.absolute(1); //输出第2条，从0开始
print(rs,1);
System.out.println("第一条数据：");
rs.beforeFirst(); //输出第1条
print(rs,1);
System.out.println("第二条数据：");
rs.afterLast(); //输出最后1条
print(rs,-1);
}
public static void print(ResultSet rs,int re) throws Exception{
if(re>0){
rs.next(); //由前向后输出
}else{
rs.previous(); //有后向前输出
}
int id = rs.getInt(1);
String name = rs.getString(2);
String pass = rs.getString(3);
int age = rs.getInt(4);
String sex = rs.getString(5);
java.util.Date d = rs.getDate(6);
System.out.println("编号："+ id);
System.out.println("姓名："+name);
System.out.println("密码："+pass);
System.out.println("年龄："+age);
System.out.println("性别："+sex);
System.out.println("生日："+d);
}
}
使用结果集插入数据
直接在user表中增加数据
//=================================================
// File Name : JDBC20_demo
//------------------------------------------------------------------------------
// Author : Common
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.sql.*;
import java.text.SimpleDateFormat;
import java.util.Scanner;
//主类
//Function : JDBC20_demo
public class JDBC20_demo {
//定义MySQL的数据库驱动程序
public static final String DBDRIVER = "org.gjt.mm.mysql.Driver";
//定义MySQL数据库的连接地址
public static final String DBURL = "jdbc:mysql://localhost:3306/mysql_demo";
//MySQL数据库的连接用户名
public static final String DBUSER = "root";
//MySQL数据库的连接密码
public static final String DBPASS = "123456";
public static void main(String[] args) throws Exception{
// TODO 自动生成的方法存根
Connection conn = null; //数据库连接
PreparedStatement pstmt = null; //数据库操作
ResultSet rs = null; //保存结果集
String sql = "SELECT id,name,password,age,sex,birthday "+ " FROM user";
Class.forName(DBDRIVER); //加载驱动程序
//连接MySQL数据库时，要写上连接的用户名和密码
conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);
//实例化PreparedStatement
pstmt = conn.prepareStatement(sql,ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
rs = pstmt.executeQuery(); //实例化ResulitSet对象
rs.moveToInsertRow(); //移动到可以插入的数据行
rs.updateString("name", "张三");
rs.updateString("password", "zhangsan");
rs.updateInt("age", 14);
rs.updateString("sex", "女");
rs.updateDate("birthday", new java.sql.Date(new java.util.Date().getTime()));
rs.insertRow(); //插入数据
rs.close();
pstmt.close();
conn.close();
}
public static void print(ResultSet rs,int re) throws Exception{
if(re>0){
rs.next(); //由前向后输出
}else{
rs.previous(); //有后向前输出
}
int id = rs.getInt(1);
String name = rs.getString(2);
String pass = rs.getString(3);
int age = rs.getInt(4);
String sex = rs.getString(5);
java.util.Date d = rs.getDate(6);
System.out.println("编号："+ id);
System.out.println("姓名："+name);
System.out.println("密码："+pass);
System.out.println("年龄："+age);
System.out.println("性别："+sex);
System.out.println("生日："+d);
}
}
使用结果集更新数据
使用限定查询，查询id编号为3的用户信息，并更新其信息
查询到了才能更新，如果没有就不能更新
//=================================================
// File Name : JDBC20_demo
//------------------------------------------------------------------------------
// Author : Common
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.sql.*;
import java.text.SimpleDateFormat;
import java.util.Scanner;
//主类
//Function : JDBC20_demo
public class JDBC20_demo {
//定义MySQL的数据库驱动程序
public static final String DBDRIVER = "org.gjt.mm.mysql.Driver";
//定义MySQL数据库的连接地址
public static final String DBURL = "jdbc:mysql://localhost:3306/mysql_demo";
//MySQL数据库的连接用户名
public static final String DBUSER = "root";
//MySQL数据库的连接密码
public static final String DBPASS = "123456";
public static void main(String[] args) throws Exception{
// TODO 自动生成的方法存根
Connection conn = null; //数据库连接
PreparedStatement pstmt = null; //数据库操作
ResultSet rs = null; //保存结果集
String sql = "SELECT id,name,password,age,sex,birthday "+ " FROM user WHERE id=?";
Class.forName(DBDRIVER); //加载驱动程序
//连接MySQL数据库时，要写上连接的用户名和密码
conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);
//实例化PreparedStatement
pstmt = conn.prepareStatement(sql,ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
pstmt.setInt(1, 2); //更新3号用户
rs = pstmt.executeQuery(); //实例化ResulitSet对象
rs.last(); //移动到最后一行
rs.updateString("name", "王小明");
rs.updateString("password", "wangxiaoming");
rs.updateInt("age", 24);
rs.updateString("sex", "男");
rs.updateDate("birthday", new java.sql.Date(new java.util.Date().getTime()));
rs.updateRow(); //更新数据
rs.close(); //关闭结果集
pstmt.close();
conn.close();
}
public static void print(ResultSet rs,int re) throws Exception{
if(re>0){
rs.next(); //由前向后输出
}else{
rs.previous(); //有后向前输出
}
int id = rs.getInt(1);
String name = rs.getString(2);
String pass = rs.getString(3);
int age = rs.getInt(4);
String sex = rs.getString(5);
java.util.Date d = rs.getDate(6);
System.out.println("编号："+ id);
System.out.println("姓名："+name);
System.out.println("密码："+pass);
System.out.println("年龄："+age);
System.out.println("性别："+sex);
System.out.println("生日："+d);
}
}
使用结果集删除数据
使用deleteRow()方法
//=================================================
// File Name : JDBC20_demo
//------------------------------------------------------------------------------
// Author : Common
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.sql.*;
import java.text.SimpleDateFormat;
import java.util.Scanner;
//主类
//Function : JDBC20_demo
public class JDBC20_demo {
//定义MySQL的数据库驱动程序
public static final String DBDRIVER = "org.gjt.mm.mysql.Driver";
//定义MySQL数据库的连接地址
public static final String DBURL = "jdbc:mysql://localhost:3306/mysql_demo";
//MySQL数据库的连接用户名
public static final String DBUSER = "root";
//MySQL数据库的连接密码
public static final String DBPASS = "123456";
public static void main(String[] args) throws Exception{
// TODO 自动生成的方法存根
Connection conn = null; //数据库连接
PreparedStatement pstmt = null; //数据库操作
ResultSet rs = null; //保存结果集
String sql = "SELECT id,name,password,age,sex,birthday "+ " FROM user WHERE id=?";
Class.forName(DBDRIVER); //加载驱动程序
//连接MySQL数据库时，要写上连接的用户名和密码
conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);
//实例化PreparedStatement
pstmt = conn.prepareStatement(sql,ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
pstmt.setInt(1, 2); //更新3号用户
rs = pstmt.executeQuery(); //实例化ResulitSet对象
rs.last(); //移动到最后一行
rs.deleteRow(); //删除数据
rs.close(); //关闭结果集
pstmt.close();
conn.close();
}
public static void print(ResultSet rs,int re) throws Exception{
if(re>0){
rs.next(); //由前向后输出
}else{
rs.previous(); //有后向前输出
}
int id = rs.getInt(1);
String name = rs.getString(2);
String pass = rs.getString(3);
int age = rs.getInt(4);
String sex = rs.getString(5);
java.util.Date d = rs.getDate(6);
System.out.println("编号："+ id);
System.out.println("姓名："+name);
System.out.println("密码："+pass);
System.out.println("年龄："+age);
System.out.println("性别："+sex);
System.out.println("生日："+d);
}
}
批处理
//=================================================
// File Name : JDBC20_demo
//------------------------------------------------------------------------------
// Author : Common
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.sql.*;
import java.text.SimpleDateFormat;
import java.util.Scanner;
//主类
//Function : JDBC20_demo
public class JDBC20_demo {
//定义MySQL的数据库驱动程序
public static final String DBDRIVER = "org.gjt.mm.mysql.Driver";
//定义MySQL数据库的连接地址
public static final String DBURL = "jdbc:mysql://localhost:3306/mysql_demo";
//MySQL数据库的连接用户名
public static final String DBUSER = "root";
//MySQL数据库的连接密码
public static final String DBPASS = "123456";
public static void main(String[] args) throws Exception{
// TODO 自动生成的方法存根
Connection conn = null; //数据库连接
PreparedStatement pstmt = null; //数据库操作
String sql = "INSERT INTO user (name,password,age,sex,birthday) "+ " VALUES (?,?,?,?,?)";
Class.forName(DBDRIVER); //加载驱动程序
//连接MySQL数据库时，要写上连接的用户名和密码
conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS);
//实例化PreparedStatement
pstmt = conn.prepareStatement(sql);
for(int i=0;i<10;i++){
pstmt.setString(1, "张三—"+i);
pstmt.setString(2, "mima—"+i);
pstmt.setInt(3, 20+i);
pstmt.setString(4, "男");
pstmt.setDate(5, new Date(new java.util.Date().getTime()));
pstmt.addBatch(); //加入批处理等待执行
}
int temp[] = pstmt.executeBatch(); //批量执行
pstmt.close();
conn.close();
}
public static void print(ResultSet rs,int re) throws Exception{
if(re>0){
rs.next(); //由前向后输出
}else{
rs.previous(); //有后向前输出
}
int id = rs.getInt(1);
String name = rs.getString(2);
String pass = rs.getString(3);
int age = rs.getInt(4);
String sex = rs.getString(5);
java.util.Date d = rs.getDate(6);
System.out.println("编号："+ id);
System.out.println("姓名："+name);
System.out.println("密码："+pass);
System.out.println("年龄："+age);
System.out.println("性别："+sex);
System.out.println("生日："+d);
}
}