java - 如何将流结果转换为字符串

Question

我想将流结果输出转换为字符串，因为我想在 Junit 中使用它我认为我需要使用字符串编写器，但我不确定如何准确使用它。

StreamResult result = new StreamResult(new File("C:\\file.xml"));
transformer.transform(source, result);

谢谢费多尔

Answer 1

查看并学习使用 StreamResult 类的 javadocs ( http://java.sun.com/javase/6/docs/api/ )。StreamResult 的构造函数之一将 Writer 对象作为参数。您将看到 Writer 的子类之一是 StringWriter。因此，要从写入 StreamResult 的内容中获取字符串，可以构造一个 StringWriter，将其放入 StreamResult，将 Source 转换（）到 StreamResult，然后从 StringWriter 中获取字符串。

//create a StringWriter for the output
StringWriter outWriter = new StringWriter();
StreamResult result = new StreamResult( outWriter );
...
transformer.transform( source, result );  
StringBuffer sb = outWriter.getBuffer(); 
String finalstring = sb.toString();

Answer 2

StringWriter writer = new StringWriter();
transformer.transform(source, new StreamResult(writer));
String output = writer.toString();

Answer 3

您可以通过这种方式使用StringWriter：

StringWriter sw = (StringWriter) result.getWriter(); 
StringBuffer sb = sw.getBuffer(); 
String finalstring = sb.toString();