package com.bupt.jdbc;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
public class JDBCTest {
public static Connection getConnection(){
Connection conn = null;
try {
Class.forName("com.mysql.jdbc.Driver"); //加载驱动
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/jsp_db?useSSL=false", "root", "19930614"); //打开连接
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}
public static void insert(){
Connection conn = getConnection();
Statement st = null;
String sql = "INSERT INTO tbl_user(name,password,email)"+
"VALUES('Tom','123456','tom@gmail.com')";
try {
st = conn.createStatement();
int count = st.executeUpdate(sql);
System.out.println("向用户表中插入了"+count+"条数据");
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void update(){
Connection conn = getConnection();
Statement st = null;
String sql = "UPDATE tbl_user SET email='Tim@126.com' WHERE name='Tom'";
try {
st = conn.createStatement();
int count = st.executeUpdate(sql);
System.out.println("向用户表中更新了"+count+"条数据");
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void delete(){
Connection conn = getConnection();
Statement st = null;
String sql = "DELETE FROM tbl_user WHERE name='Tom'";
try {
st = conn.createStatement();
int count = st.executeUpdate(sql);
System.out.println("从用户表中删除了"+count+"条数据");
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
// insert();
// update();
delete();
}
}
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