将 StreamResult 转换为字符串或 xml

Question

使用spring ws获取StreamResult如下

StreamSource source = new StreamSource(new StringReader(MESSAGE));
StreamResult result = new StreamResult(System.out);
webServiceTemplate.sendSourceAndReceiveToResult("http://someUri", 
                source, new SoapActionCallback("someCallBack"), result); 
return result;

我得到了结果，但我想将其提取为某种 xml 甚至作为字符串（只想查看内容以生成响应）。

我该怎么做？

Answer 1

试试这个：

try {
    StreamSource source = new StreamSource(new StringReader("<xml>blabla</xml>"));
    StringWriter writer = new StringWriter();
    StreamResult result = new StreamResult(writer);
    TransformerFactory tFactory = TransformerFactory.newInstance();
    Transformer transformer = tFactory.newTransformer();
    transformer.transform(source,result);
    String strResult = writer.toString();
} catch (Exception e) {
    e.printStackTrace();
}

Answer 2

您可以使用 getReader() 获取 StreamSource 的阅读器。然后，您应该能够使用 read(char[] cbuf) 将流的内容写入字符数组，如果您愿意，可以轻松地将其转换为字符串并打印到控制台。

Answer 3

如果这些都不起作用，试试这个

System.out.println(result.getOutputStream().toString());

假设你有这种结构，

private static StreamResult printSOAPResponse(SOAPMessage soapResponse) throws Exception {
    TransformerFactory transformerFactory = TransformerFactory.newInstance();
    Transformer transformer = transformerFactory.newTransformer();
    Source sourceContent = soapResponse.getSOAPPart().getContent();
    System.out.print("\nResponse SOAP Message = ");
    StreamResult result = new StreamResult(System.out);
    transformer.transform(sourceContent, result);
    return result;
}

你可以试试这种方式，虽然是一样的东西，还是想指出清楚

System.out.println(printSOAPResponse(soapResponse).getOutputStream().toString());

Answer 4

如果你使用 Spring，你也可以这样使用：

    import org.springframework.core.io.Resource;
    import org.apache.commons.io.IOUtils;
    ....    
    @Value("classpath:/files/dummyresponse.xml")
    private Resource dummyResponseFile;
    ....
    public String getDummyResponse() {
        try {
            if (this.dummyResponse == null)
                dummyResponse = IOUtils.toString(dummyResponseFile.getInputStream(),StandardCharsets.UTF_8);
        }  catch (IOException e) {
            logger.error("Fehler in Test-Service: {}, {}, {}", e.getMessage(), e.getCause(), e.getStackTrace());
            throw new RuntimeException(e);
        }
        return dummyResponse;
    }