Java xml报文截取 java如何解析xml报文

xml报文解析方法有很多种，此处采用dom4j的方法。

dom4j的jar包下载地址:https://dom4j.github.io/#

1、request.getInputStream()和new SAXReader().read(输入流):

返回的报文如下：

<?xml version="1.0" encoding="UTF-8"?>
<CreateAccessKeyResponse>
　　<CreateAccessKeyResult>
　　　　<AccessKey>
　　　　　　<UserName>aaa</UserName>
　　　　　　<AccessKeyId>2019dfc6ab5fe433f10c</AccessKeyId>
　　　　　　<Status>Active</Status>
　　　　　　<IsPrimary>false</IsPrimary>
　　　　　　<SecretAccessKey>a14aeb3ac35b835d5ec4507d5667a353c77ceedc</SecretAccessKey>
</AccessKey></CreateAccessKeyResult></CreateAccessKeyResponse>

获取参数AccessKeyId的值：

import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader; HttpURLConnection conn = create_AccessKey();     //create_AccessKey为自己写的http请求方法
		// 从request中取得输入流
		InputStream inputStream = conn.getInputStream();
		// 读取输入流
		SAXReader reader = new SAXReader();
		Document document = reader.read(inputStream);
		// 得到xml根元素
		Element root = document.getRootElement();
String AK = root.element("CreateAccessKeyResult").element("AccessKey").element("AccessKeyId").getTextTrim();
		System.out.println("AccessKeyId="+AK+"\n");

 

2、用dom4j读取xml文件中的参数：

public void readXml() throws DocumentException, FileNotFoundException, IOException {
            String xml = System.getProperty("user.dir")+File.separator+"src"+File.separator+"test"+File.separator+"java"+File.separator+"http"+File.separator+"config.xml";
            File xmlFile = new File(xml);
            SAXReader reader = new SAXReader();

            try {
                Document document = reader.read(xmlFile);
                Element root =  document.getRootElement();
                AK = root.element("ak").getTextTrim();
                SK = root.element("sk").getTextTrim();
            } catch (Exception e) {
                e.printStackTrace();
            }
  }

config.xml的内容如下：

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
　　<ak>0d34d3db4bab560d343c</ak>
    　　<sk>a52628cb22b5a12642dd907075df6996b4c8a7b1</sk>
</configuration>