MyBatis + Struts2 доступ к MS SQL, один столбец отсутствует - PullRequest
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MyBatis + Struts2 доступ к MS SQL, один столбец отсутствует

0 голосов
/ 24 марта 2020

Я недавно изучал, как использовать MyBatis + Struts2. Я создаю таблицу в MS SQL с именем Players. Есть 4 столбца, ID, PlayerNo, Team, PlayerName. PlayerName - единственный столбец, который я не могу успешно отобразить на странице.

Надеюсь, кто-нибудь может помочь прочитать мой код и дать несколько советов, спасибо. Изображение: введите описание изображения здесь 

Player.java
    public class Player {
        private int id;
        private int playerNo;
        private String team;
        private String playerName;

        public int getId() {
            return id;
        }
        public void setId(int id) {
            this.id = id;
        }

        public int getPlayerNo() {
            return playerNo;
        }
        public void setPlayerNo(int playerno) {
            this.playerNo = playerno;
        }
        public String getTeam() {
            return team;
        }
        public void setTeam(String team) {
            this.team = team;
        }
        public String getName() {
            return playerName;
        }
        public void setName(String name) {
            this.playerName = name;
        }

        @Override
        public String toString() {
            return String.format("%-2d    %-2d\t  %s     %s", id, playerNo, team, playerName);
}

player. xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
  PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="Player">

    <resultMap id="result" type="Player">
        <result property="id" column="ID"/>
        <result property="playerNo" column="PlayerNo"/>
        <result property="team" column="Team"/>
        <result property="playerName" column="PlayerName"/>   
    </resultMap>

    <select id="selectAll" resultMap="result">
        SELECT * FROM players;
    </select>

    <select id="selectById" resultMap="result">
        SELECT * FROM players WHERE id = #{id}
    </select>

    <select id="selectByPlayerNo" parameterType="int" resultMap="result">
        SELECT * FROM players WHERE playerno = #{playerNo}
    </select>

    <insert id="insert" parameterType="Player">
        INSERT INTO players (playerno, team, playername) VALUES (#{playerNo}, #{team}, #{playerName});
    </insert>

    <update id="update" parameterType="Player">
        UPDATE players
        SET playerno = #{playerNo}, team = #{team}, playername = #{playerName}
        WHERE id = #{id} 
    </update>

    <delete id="delete" parameterType="int">
        DELETE from players WHERE id = #{id}
    </delete>

</mapper>

player_get. jsp

<%@ page contentType = "text/html; charset = UTF-8" %>
<%@ taglib prefix = "s" uri = "/struts-tags" %>

<html>
   <head>
      <title>Players</title>
   </head>

   <body>
      <h3 align = "center">List</h3>
   </body>

   <table align = "center">
    <tr>
        <td>ID</td>
        <td>PlayerNo</td>
        <td>Team</td>
        <td>PlayerName</td>
    </tr>

    <s:iterator value = "players">
        <tr>
            <td><s:property value = "id"/></td>
            <td><s:property value = "playerNo"/></td>
            <td><s:property value = "team"/></td>
            <td><s:property value = "playerName"/></td>
        </tr>
    </s:iterator>   
   </table>
</html>

PlayerAction . java

package com.macletek.struts2;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import com.macletek.sql.dao.*;
import com.macletek.sql.model.*;
import com.macletek.sql.mybatis.ConnectionFactory;

public class PlayerAction {

    List<Player> players = new ArrayList<Player>();

    public List<Player> getPlayers(){
        return players;
    }

    public void setPlayers(List<Player> players) {
        this.players = players;
    }

    public String execute() throws IOException{
        PlayerDao playerDao = new PlayerDao(ConnectionFactory.getSqlSessionFactory());
        players = playerDao.selectAll();
        return "success";
    }
}
...