java连接Mysql数据库
1、我们连接在使用Java连接数据库的时候，不管是Oracle数据库还是Mysql数据库，都需要一个对应的jar包，Oracle数据库需要的是ojdbc15.jar包，而Mysql数据库需要的是mysql-connector-java-5.1.7-bin.jar包，这两种在网上都可以很方便的找到。
2、Java连接Mysql的代码如下：
private static String url = "jdbc:mysql://localhost:3306/test";
private static String userName = "root";
private static String password = "root";
public static void main(String[] args) {
MysqlConnectTest mysql= new MysqlConnectTest();
Connection con = mysql.getConnection();
if(con==null){
System.out.println("与mysql数据库连接失败！");
}else{
System.out.println("与mysql数据库连接成功！");
}
}
3、MysqlConnectTest 类中getConnection()方法如下：
public Connection getConnection(){
Connection con = null;
try {
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection(url, userName, password);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
return con;
}
4、Mysql执行查看语句：
Statement sts = null;
String sql = "select * from user_table ";
ResultSet resul = null;
try {
sts = (Statement) con.createStatement();
resul = sts.executeQuery(sql);
} catch (SQLException e) {
e.printStackTrace();
}
System.out.println("查询的结果如下：");
while(resul.next()){
System.out.println("user_id: "+resul.getString("user_id")+",user_name: "+resul.getString("user_name")+",user_sex: "+resul.getString("user_sex"));
}
5、现在执行插入语句，代码如下：
String sql = "insert into user_table values ('3','thiscode','1','28','13351210773')";
int i = 0;
try {
sts = (Statement) con.createStatement();
i = sts.executeUpdate(sql);
if(i == -1){
System.out.println("插入失敗");
}else{
System.out.println("插入成功");
}
} catch (SQLException e) {
e.printStackTrace();
}
