Question

java中怎么把数据库中数据查询出来

Answer 1

刚刚漏了帐号密码了，现在补上

try {
//这里的是MYSQL 举例
//加载驱动
Class.forName("com.mysql.jdbc.Driver");
//创建数据库连接
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","root");
//创建查询 “请求”
PreparedStatement ps = con.prepareStatement("select * from user");
//返回查询结果
ResultSet rs = ps.executeQuery();
//遍历结果
while(rs.next()) {
//假如 User 表中 有个 name 列
System.out.println("name >> "+rs.getString("name"));
}
//关闭
rs.close();
ps.close();
con.close();
} catch (Exception e) {
e.printStackTrace();
}