java链接maply
public class Demo01 { public static void main(String[] args) throws ClassNotFoundException, SQLException { //1.注册驱动 (这里会出现编译器异常) Class.forName("com.mysql.jdbc.Driver"); // 2.获取连接对象 jdbc:mysql:(固定的)localhost(本机的ip地址)3306(mysql固定段括号)demo1127(你要操作那个) //明确你要链接那个计算机上的库 String url="jdbc:mysql://localhost:3306/demo1127?characterEncoding=UTF-8"; // 指定用户名 String user="root"; // 密码 String pwd="123456"; // 获取链接对象 // Connection 导sql包 DriverManager.getConnection(url,user,pwd);(会抛异常) Connection conn= DriverManager.getConnection(url,user,pwd); // 3.获取语句执行对象 // Statement(选择sql包) Statement sta=conn.createStatement(); // 4.执行sql语句 String sql="insert into student(Sname,ssex,money) values('张三','男',100)"; String sql1="select*form student"; // 专门执行 增,删,改语句 int row=sta.executeUpdate(sql);//括号是传语句 System.out.println(row); // 释放资源(先开后关) sta.close(); conn.close();
package com.oracle.demo03; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; import java.sql.Statement; public class Demo01 { public static void main(String[] args) throws ClassNotFoundException, SQLException { //1.注册驱动 Class.forName("com.mysql.jdbc.Driver"); // 2.获取连接对象 String url="jdbc:mysql://localhost:3306/demo1127?characterEncoding=UTF-8"; String user="root"; String pwd="123456"; Connection conn= DriverManager.getConnection(url,user,pwd); // 3.获取语句执行对象 Statement sta=conn.createStatement(); // 4.执行sql语句 String sql="insert into student(Sname,ssex,money) values('张三','男',100)"; int row=sta.executeUpdate(sql); System.out.println(row); // 释放资源(先开后关) sta.close(); conn.close(); } } package com.oracle.demo03; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; import java.sql.Statement; public class Demo01 { public static void main(String[] args) throws ClassNotFoundException, SQLException { //1.注册驱动 Class.forName("com.mysql.jdbc.Driver"); // 2.获取连接对象 String url="jdbc:mysql://localhost:3306/demo1127?characterEncoding=UTF-8"; String user="root"; String pwd="123456"; Connection conn= DriverManager.getConnection(url,user,pwd); // 3.获取语句执行对象 Statement sta=conn.createStatement(); // 4.执行sql语句 String sql="insert into student(Sname,ssex,money) values('张三','男',100)"; int row=sta.executeUpdate(sql); System.out.println(row); // 释放资源(先开后关) sta.close(); conn.close(); } } package com.oracle.demo03; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; import java.sql.Statement; public class Demo01 { public static void main(String[] args) throws ClassNotFoundException, SQLException { //1.注册驱动 Class.forName("com.mysql.jdbc.Driver"); // 2.获取连接对象 String url="jdbc:mysql://localhost:3306/demo1127?characterEncoding=UTF-8"; String user="root"; String pwd="123456"; Connection conn= DriverManager.getConnection(url,user,pwd); // 3.获取语句执行对象 Statement sta=conn.createStatement(); // 4.执行sql语句 String sql="insert into student(Sname,ssex,money) values('张三','男',100)"; int row=sta.executeUpdate(sql); System.out.println(row); // 释放资源(先开后关) sta.close(); conn.close(); } } package com.oracle.demo03; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; import java.sql.Statement; public class Demo01 { public static void main(String[] args) throws ClassNotFoundException, SQLException { //1.注册驱动 Class.forName("com.mysql.jdbc.Driver"); // 2.获取连接对象 String url="jdbc:mysql://localhost:3306/demo1127?characterEncoding=UTF-8"; String user="root"; String pwd="123456"; Connection conn= DriverManager.getConnection(url,user,pwd); // 3.获取语句执行对象 Statement sta=conn.createStatement(); // 4.执行sql语句 String sql="insert into student(Sname,ssex,money) values('张三','男',100)"; int row=sta.executeUpdate(sql); System.out.println(row); // 释放资源(先开后关) sta.close(); conn.close(); } }