通过request请求获取<xml>

使用io流完成request传参，获取<xml>,具体代码如下：

public Object getParameter(HttpServletRequest request, HttpServletResponse response){

request.setCharacterEncoding("UTF-8");//设置字符格式
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
response.setHeader("Access-Control-Allow-Origin", "*");
// achieve input stream
InputStream in = request.getInputStream();
ByteArrayOutputStream out = new ByteArrayOutputStream();
// length of string
byte[] buffer = new byte[1024];
int len = 0;
// achieve data from in
while ((len = in.read(buffer)) != -1) {
out.write(buffer, 0, len);
}
in.close();
out.close();

//获取流对象内容

String content = new String(out.toByteArray(), "utf-8");
//获取json对象

JSONObject jsonObject = JSONObject.parseObject(XmltoJsonUtil.xml2JSON(content));
//获取xml对象
JSONObject result_xml = jsonObject.getJSONObject("xml");
// 获取<xml>中某个对象具体的值
JSONArray return_code = result_xml.getJSONArray("return_code");
String code = return_code.get(0).toString();

System.out.println("code:"+code);

}

//<xml>转为json格式

public class XmltoJsonUtil {
public static String xml2JSON(String xml) {
JSONObject obj = new JSONObject();
try {
InputStream is = new ByteArrayInputStream(xml.getBytes("utf-8"));
SAXBuilder sb = new SAXBuilder();
Document doc = sb.build(is);
Element root = doc.getRootElement();
obj.put(root.getName(), iterateElement(root));
return obj.toString();
} catch (Exception e) {
e.printStackTrace();
return null;
}
}

eg：输入的<xml>对象为：

<xml>
<return_code>SUCCESS</return_code>
<appid><![CDATA[wx2421b1c4370ec43b]]></appid>
<mch_id><![CDATA[10000100]]></mch_id>
<nonce_str><![CDATA[TeqClE3i0mvn3DrK]]></nonce_str>

</xml>

输出结果为：

code：SUCCESS