不知道哪里错了，该怎么改，求各位大神教！谢谢！

报错： Can not issue data manipulation statements with executeQuery().

代码如下：
public class person_entity_dao {

public List quaryList(String name,String age,String sex,String time,String telphone,String rid,String did,String username,String password){

     Map<String, String> map =new HashMap<String, String>();
     ResultSetMetaData md = null;


    List listOfRows = new ArrayList();
     try {
          Connection conn=this.connectionDB();
          String insert="insert into tb_user (name,age,sex,time,telphone,rid,did,username,password) values ('"+name+"','"+age+"','"+sex+"','"+time+"','"+telphone+"','"+rid+"','"+did+"','"+username+"','"+password+"')";
          System.out.println(insert);
         //编译sql语句
          PreparedStatement  ps=conn.prepareStatement(insert);

          //获得结果集 
           ResultSet rs= ps.executeQuery();
           md=rs.getMetaData();
           int num=md.getColumnCount();
        while(rs.next()){
            LinkedHashMap mapOfColValues = new LinkedHashMap(num);
          for(int i=0;i<=num;i++){
              mapOfColValues.put(md.getColumnName(i), rs.getObject(i));
          }
            listOfRows.add(mapOfColValues);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return listOfRows;
}





public Connection connectionDB() throws Exception{
    String  url="jdbc:mysql://localhost:3306/test"; 
    Connection conn=null;
    try{
        Class.forName("com.mysql.jdbc.Driver");
        conn=DriverManager.getConnection(url, "root", "123456");
    }
    catch(ClassNotFoundException e){
        System.out.println("驱动失败");
    }
    catch(SQLException e){

        System.out.println("连接数据库失败");
      }

      return conn;
    }
    public class person_service {
person_entity_dao dao =new person_entity_dao();

public List quaryList(String name,String age,String sex,String time,String telphone,String rid,String did,String username,String password){


    return dao.quaryList(name, age, sex, time, telphone, rid, did, username, password);

}

}
public class personAction extends ActionSupport {

private static final long serialVersionUID = 1L;
person_service service =new person_service();

public  String insert() throws Exception {

    String name=ServletActionContext.getRequest().getParameter("name");
    String age=ServletActionContext.getRequest().getParameter("age");
    String sex=ServletActionContext.getRequest().getParameter("sex");
    String time=ServletActionContext.getRequest().getParameter("time");
    String telphone=ServletActionContext.getRequest().getParameter("telphone");
    String rid=ServletActionContext.getRequest().getParameter("rid");
    String did=ServletActionContext.getRequest().getParameter("did");
    String username=ServletActionContext.getRequest().getParameter("username");
    String password=ServletActionContext.getRequest().getParameter("password");
    List listofRows=service.quaryList(name, age, sex, time, telphone, rid, did, username, password);

    System.out.println(listofRows.toString());
    //双向搜索接口Iterator
    Iterator  its=listofRows.iterator();   

   while( its.next()!= null){
       return "success";
   }

       return "fail";

}

}

//获得结果集
ResultSet rs= ps.executeQuery(); //select才用这个

上面那一句改成:

int result = ps.executeUpdate() ; // insert , update,delete都用这个.
//如果result大于0,则表示操作执行成功.

executeQuery()这个方法被用来执行 SELECT 语句 用executeUpdate()这个方法