struts2 Action 返回值总结+案例分析 (jsp/html, 字符串,json数据)

心已赠人 2022-05-28 00:30 112阅读 0赞

一.返回jsp/html页面

//Action
    public String ListUsers() {
       List<Users> userslist = usersService.findAll();
       ServletActionContext.getRequest().setAttribute("userslist",
             userslist);
       return "success";
    }

//配置
    <action name="users_list" class="com.action.UsersAction" method="ListUsers">
       <result name="list_success">/user_list.jsp</result>
    </action>

二.返回String字符串

返回一个success字符串

private InputStream inputStream; //这个名字和struts.xml中对应，不能写错
    
    //action
    public String UsersDelete() {
       try {
          inputStream = new ByteArrayInputStream("success"
                .getBytes("UTF-8"));
       } catch (UnsupportedEncodingException e) {
          // TODO Auto-generated catch block e.printStackTrace();
       }
       return "success";
    }

//配置
    <action name="users_delete" class="com.action.UsersAction" method="UsersDelete">
            <result type="stream">  
               <param name="contentType">text/html</param>  
               <param name="inputName">inputStream</param>  
              </result>  
    </action>

三:返回json数据

//Action
    private ArticleService articleService;
    private List<Article> articlelist = new ArrayList<Article>();
    //文章列表
    public String QueryArticle() {
       articlelist = articleService.findAll();
       return SUCCESS;
    }

//配置
     <package name="" extends="struts-default,json-default" namespace="/">
      <action name="query_article" class="com.m.action.mArticleAction" method="QueryArticle">
              <result name="success" type="json">
                  <param name="root">articlelist</param>
              </result>
           </action>
        </package>

妥了 ![大笑][laugh.gif]

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