struts2 从 2.3.16 更新到 2.3.32（修复 S2-045）后，JSP 文件无法解析某些对象的字段

Question

最近我们修复了 struts2 的 'S2-045' problem.I 更新了所有 struts2 相关的 jar 文件，包括 freemarker、ognl、xWork 等。我使用 tomcat8 来部署我的动态 Web 项目。启动 tomcat-服务器时没有任何 Exceptions。但是似乎出现了一些问题：一些值（从数据库中获取）应该显示在jsp页面上不再显示 .没有 Exceptions 抛出。我还可以看到我已经在 Action Classes 中正确地得到了非常对象。

以下是一些例子

    // index.jsp ----- here is the list I want to show on the page.
    // the list is the type of List<News> (Class News is my bussiness Class).
    // I want to get the 'fTitle' and 'fCreatetime_s' from 'News' but they 
    //     do not show up! (This used to be working very well.)
    <s:bean name="org.ulibrary.web.Getarclist">
      <s:iterator value="list">
        <li>
            <span class="listTitle">
                 <a target="_blank" href="ViewArc.action?   uuid=${UUID}">${fTitle}</a>
             </span>
            <span class="listDate">${fCreatetime_s}</span>
        </li>
      </s:iterator>
    </s:bean>
    //=================================================================

以下是相关字段 id News.java

    // News.java (**just some ralated fields**)
    class News{
        @Id
        @GeneratedValue(generator = "system-uuid")
        @GenericGenerator(name = "system-uuid", strategy = "uuid")
        @Column(name = "f_uuid", length = 32, unique = true)
        private String UUID;

        @Column(name = "f_title", length = 200)
        private String fTitle; 

        @Transient
        private String fCreatetime_s;

        public String getUUID() {
            return UUID;
        }
        public void setUUID(String uuid) {
            UUID = uuid;
        }

        public String getFTitle() {
            return fTitle;
        }


        public void setFTitle(String title) {
            fTitle = title;
        }

        public String getFCreatetime_s() {
            SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
            return formatter.format(Long.valueOf(fCreatetime));
        }


        public void setFCreatetime_s(String createtime_s) {
            fCreatetime_s = createtime_s;
        }
    }

然后是 GetarcList.java

    //GetarcList.java (just include some related fields)
    class GetarcList{
        private List list;

        public void setList(List list) {
            this.list = list;
        }

        //!!!!!!$$$$$$$$--- Attention -----$$$$$$$$$!!!!!!!!!!!
        // this method returns a List<News> , I can successfully get every value of 'News' in the list
        public List getList() throws AuctionException{
            String orderby_str = (String) OrderByMap.get(String.valueOf(orderby));
            list = webTagManager.getArcList(row, typeid, titlelen, infolen, orderby_str + " " + orderway);
            return list;
         }

    }

我认为这可能是由 OGNL 或 JSP 相关的 jar 文件引起的。我在 index.jsp 或 java 文件中没有发现任何问题。

Answer 1

您需要按以下格式使用getters/setters。只有一个开头小写字母的属性不会大写。

    public String getfTitle() {
        return fTitle;
    }


    public void setfTitle(String title) {
        fTitle = title;
    }

struts2 从 2.3.16 更新到 2.3.32（修复 S2-045）后，JSP 文件无法解析某些对象的字段

After having updated struts2 from 2.3.16 to 2.3.32（fix the S2-045), the JSP file can not resolve some Objects' fields

java

jsp

struts2

el

ognl