java.util.HashMap cannot be cast to com.XXX.XXX

木头没有瓜2024-04-25 16:19

先上报错代码

复制代码

String resultStr = "";
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("pageIndex", 1);
		map.put("pageSize", 2);
		map.put("title", content);
		PageInfo<Article> articleList = articleService.query(map); // 查询列表
		if (articleList.getList().size() == 0) {
			String str = "回答内容不超过200字" + content;
			if (wordService.getWord(str) != null) {
				resultStr = wordService.getWord(str);
			}
		} else {
			List<Article> list = articleList.getList();
            logger.info(list);
            // 这里报错 java.util.HashMap cannot be cast to com.XXX.XXX
			for (Article article : list) {
				Article art = articleService.find(article.getId());
				resultStr = art.getContent();
			}
		}

service层代码

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import java.util.Map;

public interface ArticleService {

    // 分页查询
    PageInfo<Article> query(Map<String, Object> paramMap);
    
}

问题原因处在mybatis

问题代码

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  	<!-- 获取文章列表 这里不获取content 内容太多  -->
    <select id="query" parameterType="java.util.Map" resultType="com.hi.hailiaowenan.affair.bean.Article">
    	select id, title, description, images,
    	    create_time as createTime, update_time as updateTime
    	from
    	<include refid="table_name"></include>
    </select>

一开始我是用resultType="java.util.Map"作为返回类型

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<select id="query" parameterType="java.util.Map" resultType="java.util.Map">

所以报错，要改成自己的类

复制代码

  	<!-- 获取文章列表 这里不获取content 内容太多  -->
    <select id="query" parameterType="java.util.Map" resultType="com.hi.hailiaowenan.affair.bean.Article">
    	select id, title, description, images,
    	    create_time as createTime, update_time as updateTime
    	from
    	<include refid="table_name"></include>
      </trim>
    </select>