如何将 Java 对象列表检索到 jsp 文件中

Question

I'm working on a java-jsp project and I'm having a list of java objects to be displayed in the jsp page. The java line containing the list of those objects is as follows:

private List<String> derivedNames;
private List<DiffResponse> diffResponses;
private List<String> pRResults;

DiffResponse class is like this:

private String path;
private List<DiffOutput> diffOutputList;
private boolean isConflict;

In the jsp file when I console.log the diffOutput, it returns pure java object as stated below without showing the content inside.

org.example.rs.umt.DiffOutput@4d9d8911, 
org.example.rs.umt.DiffOutput@3cc6fff7, 
org.example.rs.umt.DiffOutput@311bce65, 
org.example.rs.umt.DiffOutput@7611bf66, 
org.example.rs.umt.DiffOutput@57e575b4, 
org.example.rs.umt.DiffOutput@5c5711f8,

Below is the jsp code to retrieve the data:

<c:forEach items="${results.diffResponses}" var="diffResponse">
      var distributionPath = '<c:out value="${diffResponse.distributionPath}"/>'
      console.log("Dist: ",distributionPath);
      var diffOutputList = '<c:out value="${diffResponse.diffOutputList}"/>'
      console.log(diffOutputList);
</c:forEach>

Here the distributionPath is obtained as expected

Answer 1

Well your diffOutputList is in itself a list. So you have to do a nested <c:forEach> like this:

 <c:forEach items="${results.diffResponses}" var="diffResponse">
      var distributionPath = '<c:out value="${diffResponse.distributionPath}"/>'
      console.log("Dist: ",distributionPath);
      <c:forEach items="${diffResponse.diffOutputList}" var="diffOutput">
           var diffOutput = '<c:out value="${diffOutput.???}"/>'
           console.log(diffOutput);
      </c:forEach>
</c:forEach>

So if have included ??? in the code. There you have to set a field which exists in class DiffOutput.

Another way is to overwrite the .toString() method in class DiffOutput.