调用类DBUtil,select查询

package com.company.Util;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * 第一：测试DBUtil是否好哦用
 *第二：模糊查询怎么写？
 * */
public class JDBCTest06 {
public static void main(String[] args) {
     Connection conn=null;
     PreparedStatement ps=null;
    ResultSet rs=null;
    try {
      conn=  DBUtil.getConnection();
        String sql="select * from t_user where loginName like ?";

        ps=conn.prepareStatement(sql);
        ps.setString(1,"王%");
        rs=ps.executeQuery();
        while(rs.next()){
            System.out.println(rs.getString("loginName"));
            System.out.println(rs.getInt("loginPwd"));
            System.out.println(rs.getString("realName"));

        }

    } catch (SQLException e) {
        e.printStackTrace();
    }finally {
        DBUtil.close(conn,ps,rs);
    }
}

}