MyBatis3传递多个参数(Multiple Parameters)

传递多个参数一般用在查询上，比如多个条件组成的查询，有以下方式去实现：

版本信息：

MyBatis：3.4.4

1、自带方法

  <select id="getUserArticlesByLimit" resultMap="resultUserArticleList">
    select user.id,user.userName,user.userAddress,article.id as aid,article.title,article.content from user,article where user.id=article.userid and user.id=#{arg0} limit #{arg1},#{arg2}
  </select>

public List<Article> getUserArticlesByLimit(int id,int start,int limit);
List<Article> articles=userMapper.getUserArticlesByLimit(1,0,2);

说明，arg0...也可以写成param0...

2、直接传递对象

  <select id="dynamicIfTest" parameterType="Article" resultType="Article">
    select * from article where 1 = 1
    <if test="title != null">
      and title = #{title}
    </if>
    <if test="content != null">
      and content = #{content}
    </if>
    limit 1
  </select>

public Article dynamicIfTest(Article article);
        Article inArticle = new Article();
        inArticle.setTitle("test_title");
        Article outArticle = userOperation.dynamicIfTest(inArticle);

3、使用@Praam标注

  <select id="dynamicChooseTest" resultType="Article">
    select * from article where 1 = 1
    <choose>
      <when test="title != null">
        and title = #{title}
      </when>
      <when test="content != null">
        and content = #{content}
      </when>
      <otherwise>
        and tile = "test_title"
      </otherwise>
    </choose>
  </select>

public Article dynamicChooseTest(
      @Param("title")
      String title,
      @Param("content")
      String content);
Article outArticle2 = userOperation.dynamicChooseTest("test_title",null);

说明：这种方法同样可以用在一个参数的时候。

4、使用HashMap

<select id="getArticleBeanList" resultType="ArticleBean">
　　select * from article where id = #{id} and name = #[code]
</select>

说明：parameterType="hashmap"可以不用写。

public List<ArticleBean> getArticleBeanList(HashMap map);

        HashMap<String, Object> map = new HashMap<String, Object>();
        map.put("id", 1);
        map.put("code", "123");
        List<Article> articless3 = userOperation.getArticleBeanList(map);

特殊的HashMap示例，用在foreach节点：

  <select id="dynamicForeach3Test" resultType="Article">
    select * from article where title like "%"#{title}"%" and id in
    <foreach collection="ids" index="index" item="item" open="(" separator="," close=")">
      #{item}
    </foreach>
  </select>

public List<Article> dynamicForeach3Test(Map<String, Object> params);

        HashMap<String, Object> map = new HashMap<String, Object>();
        map.put("title", "title");
        map.put("ids", new int[]{1,3,6});
        List<Article> articless3 = userOperation.dynamicForeach3Test(map);

5、List结合foreach节点一起使用

  <select id="dynamicForeachTest" resultType="Article">
    select * from article where id in
    <foreach collection="list" index="index" item="item" open="(" separator="," close=")">
      #{item}
    </foreach>
  </select>

public List<Article> dynamicForeachTest(List<Integer> ids);

        List<Integer> ids = new ArrayList<Integer>();
        ids.add(1);
        ids.add(3);
        ids.add(6);
        List<Article> articless = userOperation.dynamicForeachTest(ids);

6、数组结合foreach节点一起使用

  <select id="dynamicForeach2Test" resultType="Article">
    select * from article where id in
    <foreach collection="array" index="index" item="item" open="(" separator="," close=")">
      #{item}
    </foreach>
  </select>

public List<Article> dynamicForeach2Test(int[] ids);

int[] ids2 = {1,3,6};
List<Article> articless2 = userOperation.dynamicForeach2Test(ids2);

参考：

http://www.yihaomen.com/article/java/426.htm

到此这篇关于MyBatis3传递多个参数(Multiple Parameters)的文章就介绍到这了,更多相关MyBatis3传递多个参数内容请搜索我们以前的文章或继续浏览下面的相关文章希望大家以后多多支持我们！