1
您好我已經在Struts2中創建了一個動作類「MyClass」,我想在我的jsp文件中獲取它的實例變量「validationResult」,但是我得到了null另一個實例變量「version」正在填充。當我使用<s:iterator>
標記顯示其內容時,它也顯示實例變量「validationResult」的內容。Struts2無法檢索包含的對象用作動作類中的屬性
Action類
package my.com;
public class MyClass extends ActionSupport{
private String version;
private List<VersionTO> validationResult;
@Override
public String execute() throws Exception {
validationResult=Arrays.asList(new VersionTO ("abc","def","ghi","jkl"), new VersionTO("mno","pqr","stu","vwx"));
version="212";
return SUCCESS;
}
public String getVersion() {
return Version;
}
public void setVersion(String version) {
this.version = version;
}
public List<VersionTO> getValidationResult() {
return validationResult;
}
public void setValidationResult(List<VersionTO> validationResult) {
this.validationResult = validationResult;
}
}
豆
pack my.be;
public class VersionTO {
private String server;
private String version;
private String versionOn;
private String compared;
public VersionTO() {
super();
}
public VersionTO(String server, String version,
String versionOn, String compared) {
this.server = server;
this.version = version;
this.versionOn = versionOn;
this.compared = compared;
}
public String getServer() {
return server;
}
public void setServer(String server) {
this.server = server;
}
public String getVersion() {
return version;
}
public void setVersion(String version) {
this.version = version;
}
public String getVersionOn() {
return versionOn;
}
public void setVersionOn(String versionOn) {
this.versionOn = versionOn;
}
public String getCompared() {
return compared;
}
public void setCompared(String compared) {
this.comparedVersion = compared;
}
}
JSP
<jsp:useBean id="ver" class="MyClass" scope="page">
<jsp:setProperty name="ver" property="*" />
</jsp:useBean>
<jsp:getProperty name="ver" property="vdVersion"/> <!--here i am getting proper output ie 212-->
<jsp:getProperty name="ver" property="validationResult"/> <!--here i am getting null in the output -->
<%
if (ver.getValidationResult() != null && ver.getValidationResult().isEmpty()) {
%>
<!-- logic for Presentation not working as each time I am getting null in validationResult -->
<%
}
%>
<!-- working fine -->
<s:iterator value="validationResult">
<tr>
<td><s:property value="server" /></td>
<td><s:property value="version" /></td>
<td><s:property value="versionOn" /></td>
<td><s:property value="compared" /></td>
</tr>
</s:iterator>
感謝安德烈亞斯但我已經添加了一個默認的構造函數,但我忘了將它張貼 – user3291853 2014-09-12 14:09:29
感謝@Andreas它的工作,但仍didnt得到了爲何** **標籤不工作? –
user3291853
2014-09-15 08:54:53
不確定,初始化問題我猜...不值得調查,只是使用正確的標籤 – 2014-09-15 09:03:46