java - 非法状态异常 : Content has been consumed - How to resolve?

Question

我有以下代码:

HttpGet httpGet = new HttpGet(serverAdress + "/rootservices");
        httpGet.setHeader("Accept", "text/xml");
        HttpResponse response = client.execute(httpGet, localContext);

        String projectURL = XMLDocumentParser.parseDocument(response.getEntity().getContent(), "oslc_scm:scmServiceProviders", "rdf:resource");
        String workItemURL = XMLDocumentParser.parseDocument(response.getEntity().getContent(), "oslc_cm:cmServiceProviders", "rdf:resource");

这里的问题是我读取了两次 HttpResponse 对象。所以第二次我得到了异常(exception)。但尽管我知道问题所在，但我找不到简单的解决方案。那么有什么好的方法可以解决这个问题呢？

Answer 1

将 response.getEntity().getContent() 返回的输入流读取到 byte[] 中，存储在本地变量中。请参阅Convert InputStream to byte array in Java .

byte[] content = IOUtils.toByteArray(response.getEntity().getContent());

String projectURL = XMLDocumentParser.parseDocument(new ByteArrayInputStream(content), "oslc_scm:scmServiceProviders", "rdf:resource");
String workItemURL = XMLDocumentParser.parseDocument(new ByteArrayInputStream(content), "oslc_cm:cmServiceProviders", "rdf:resource");