import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.util.Arrays;

public class Demo {

static String selectsql = null;

static ResultSet retsult = null;

public static final String url = "jdbc:mysql://127.0.0.1/test";

public static final String name = "com.mysql.jdbc.Driver";

public static final String user = "root";

public static final String password = "123456";

public static Connection conn = null;

public static PreparedStatement pst = null;    

public static void main(String[] args) {

int paraCount = 5; //读取参数数量

selectsql = "select * from testpass";//SQL语句    

try {

Class.forName(name);//指定连接类型

conn = DriverManager.getConnection(url, user, password);//获取连接

pst = conn.prepareStatement(selectsql);//准备执行语句

} catch (Exception e) {

e.printStackTrace();

}    

String [] paras = new String [paraCount];

try {

retsult = pst.executeQuery();//执行语句，得到结果集

while (retsult.next()) {

for(int i = 0;i<paraCount;i++){

paras[i] = retsult.getString(i+2);

}

System.out.println(Arrays.toString(paras));

}//显示数据

retsult.close();

conn.close();//关闭连接

pst.close();

} catch (SQLException e) {

e.printStackTrace();

}

}

}