Java解析XML字符串「建议收藏」

大家好，又见面了，我是你们的朋友全栈君。

在网上找了很多Java语言解析XML字符串的资料，很多内容写得很繁复，没有普适性，遂自己动手写了一个用Java解析XML的工具类。话不多说，直接看下面代码：

XML解析工具类：

import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;

import java.io.ByteArrayInputStream;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/** * @author : chenfan * @className : XMLParse * @date : Created in 2021/3/29 13:59 * @description : XML解析工具 */

public class XMLParse { 
   

    public static Map<String, Object> getValueByNode(String xml, List<String> nodes, String charsetName) throws DocumentException, UnsupportedEncodingException { 
   
        Document document = new SAXReader().read(new ByteArrayInputStream(xml.getBytes(charsetName)));
        Map<String, Object> result = new HashMap();
        nodes.forEach(node -> { 
   
            String xpath = "//" + node;
            Node singleNode = document.selectSingleNode(xpath);
            if(singleNode != null) { 
   
                result.put(node, singleNode.getStringValue());
            }
        });
        return result;
    }
}

测试案例：

import com.chenfan.XMLParse;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/** * @author : chenfan * @className : TestXmlPrase * @date : Created in 2021/3/29 14:02 * @description : 测试类 */
public class TestXmlPrase { 
   
    public static void main(String[] args) { 
   
        String xml = "<?xml version=\"1.0\" encoding=\"utf-16\"?>\n" +
                     "<HouseVo xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">\n" +
                     " <returnCode>100</returnCode>\n" +
                     " <reason>获取成功！</reason>\n" +
                     " <orderNo>ZK12345678</orderNo>\n" +
                     " <totalAmount>2000000</totalAmount>\n" +
                     " <payedAmount>0</payedAmount>\n" +
                     " <oweAmount>0</oweAmount>\n" +
                     " <name>张三</name>\n" +
                     " <addr>测试用例</addr>\n" +
                     "</HouseVo>";

        Map<String, Object> map = new HashMap<>();
        try { 
   
            List<String> nodes = new ArrayList<>();
            nodes.add("returnCode");
            nodes.add("reason");
            nodes.add("orderNo");
            nodes.add("totalAmount");
            nodes.add("payedAmount");
            nodes.add("oweAmount");
            nodes.add("name");
            nodes.add("addr");

            /* * 注意此处处理xml报文的坑： * xml报文encoding是utf-16，所以此处XML解析的charsetName须为utf-16 * charsetName若跟xml报文encoding不一致，会报错：“前言中不允许有内容” */
            map = XMLParse.getValueByNode(xml, nodes, "utf-16");
        } catch (Exception e) { 
   
            e.printStackTrace();
            System.out.println("xml解析失败");
        }

        System.out.println("returnCode：" + map.get("returnCode"));
        System.out.println("reason：" + map.get("reason"));
        System.out.println("orderNo：" + map.get("orderNo"));
        System.out.println("totalAmount：" + map.get("totalAmount"));
        System.out.println("payedAmount：" + map.get("payedAmount"));
        System.out.println("oweAmount：" + map.get("oweAmount"));
        System.out.println("name：" + map.get("name"));
        System.out.println("addr：" + map.get("addr"));

    }
}

测试结果：