将文件(XML文件)写入字符串/内存

下面的方法可以将一个文件中的所有内容写入一个字符串中

public String file2String() throws TransformerException, IOException {
		BufferedReader br = new BufferedReader(new FileReader(
				"C://4test//test.xml"));

		Writer writer = new StringWriter();

		String str = "";
		while ((str = br.readLine()) != null) {
			writer.write(str + "\n");
			writer.flush();
		}

		String reValue = writer.toString();
		System.out.println(reValue);
		return reValue;
	}