package com.shiyanlou;
import java.sql.*;
public class JdbcTest {
// JDBC 驱动器名称 和数据库地址
static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
//数据库的名称为 EXAMPLE
static final String DB_URL = "jdbc:mysql://localhost/EXAMPLE";
// 数据库用户和密码
static final String USER = "root";
static final String PASS = "";
public static void main(String[] args) {
Connection conn = null;
Statement stmt = null;
try{
//注册JDBC 驱动程序
Class.forName("com.mysql.jdbc.Driver");
//打开连接
System.out.println("Connecting to database...");
conn = DriverManager.getConnection(DB_URL,USER,PASS);
//执行查询
System.out.println("Creating statement...");
stmt = conn.createStatement();
String sql;
sql = "SELECT id, name, age FROM Students";
ResultSet rs = stmt.executeQuery(sql);
//得到和处理结果集
while(rs.next()){
//检索
int id = rs.getInt("id");
int age = rs.getInt("age");
String name = rs.getString("name");
//显示
System.out.print("ID: " + id);
System.out.print(", Age: " + age);
System.out.print(", Name: " + name);
System.out.println();
}
//清理环境
rs.close();
stmt.close();
conn.close();
}catch(SQLException se){
// JDBC 操作错误
se.printStackTrace();
}catch(Exception e){
// Class.forName 错误
e.printStackTrace();
}finally{
//这里一般用来关闭资源的
try{
if(stmt!=null)
stmt.close();
}catch(SQLException se2){
}
try{
if(conn!=null)
conn.close();
}catch(SQLException se){
se.printStackTrace();
}
}
System.out.println("Goodbye!");
}
}
java访问数据库
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转载自blog.csdn.net/geekerstar/article/details/78150901
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