JAVA 将xml文件转换成String
调用webservice方法的时候，参数有时经常是xml文件的字符串形式，简单的拼个字符串还好说，比如：
StringBuilder str = new StringBuilder("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
str.append("<REQUEST>");
str.append("<NAME>").append("echo").append("</NAME>");
str.append("<AGE>").append("6").append("</AGE>");
str.append("</REQUEST>");
System.out.println(str.toString());但是，对于比较复杂的xml手动拼字符串就太过麻烦了……，所以想办法将xml转化成了字符串，在此记录一下：
import java.io.File;
import java.io.StringWriter;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
private String turnDocumentToString() {
try {
// 读取 xml 文件
File fileinput = new File("E:/test.xml");
DocumentBuilderFactory dbFactory = DocumentBuilderFactory
.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(fileinput);
// 方法1：将xml文件转化为String
// StringWriter sw = new StringWriter();
// TransformerFactory tf = TransformerFactory.newInstance();
// Transformer transformer = tf.newTransformer();
// transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION,
// "no");
// transformer.setOutputProperty(OutputKeys.METHOD, "xml");
// transformer.setOutputProperty(OutputKeys.INDENT, "yes");
// transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
// transformer.transform(new DOMSource(doc), new StreamResult(sw));
//方法2：和方法1类似
DOMSource domSource = new DOMSource(doc);
StringWriter writer = new StringWriter();
StreamResult result = new StreamResult(writer);
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
transformer.transform(domSource, result);
// 将转换过的xml的String 样式打印到控制台