我正在做一個小型的spring項目,當我嘗試toi顯示數據迭代resultList時,resultList被設置,foreach循環超過4次,因爲有項目但是有一個例外,經過我意識到項目是retrive,但如果他們只是對象,而不是porper鑄類class Result這個原因當我嘗試調用getUrl()方法時(如果我打電話toString工作正常)任何幫助時chrash?spring <c:foreach isue jstl java
是這樣的控制器
@RequestMapping(value = "/search", method = RequestMethod.GET)
public ModelAndView home(ModelMap model,@RequestParam(required=false,value="") String name) {
List<Result> result = googleSearchService.doSearch(name);
modelAndView.addObject("resultList",result);//<- after debub list is full of Result items
return modelAndView;
}
是這樣的視圖
<c:forEach items="${resultList}" var="item">
<li><c:out value="${item.getUrl()}"/></li>
</c:forEach>
結果類是一個內部類:
public class GoogleResults {
private ResponseData responseData;
public ResponseData getResponseData() {
return responseData;
}
public void setResponseData(ResponseData responseData) {
this.responseData = responseData;
}
public String toString() {
return "ResponseData[" + responseData + "]";
}
static class ResponseData {
private List<Result> results;
public List<Result> getResults() {
return results;
}
public void setResults(List<Result> results) {
this.results = results;
}
public String toString() {
return "Results[" + results + "]";
}
}
static class Result {
public String url;
private String title;
public String getUrl() {
return url;
}
public String getTitle() {
return title;
}
public void setUrl(String url) {
this.url = url;
}
public void setTitle(String title) {
this.title = title;
}
public String toString() {
return "Result[url:" + url + ",title:" + title + "]";
}
}
}
跟蹤:
ava.lang.NullPointerException javax.el.BeanELResolver.invoke(BeanELResolver.java:159) org.apache.jasper.el.JasperELResolver.invoke(JasperELResolver.java:147) org.apache.el.parser.AstValue.getValue(AstValue.java :157) org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:187)
使用的 –
2014-10-02 14:08:27
有趣的是,我得到了javax.el.PropertyNotFoundException:Propiedad'url'no legible para el tipo com.leanupp.researcher.GoogleResults $結果 – Xenione 2014-10-02 14:14:00
結果是一個靜態內部類的一些問題呢? – Xenione 2014-10-02 14:14:35