Java中xml字符串与json字符串的互转

        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20180813</version>
        </dependency>

    /**
     * @Description: XML字符串 -> JSON字符串
     * @Author: Yiang37
     * @Date: 2021/08/12 10:53:47
     * @Version: 1.0
     */
    public static String xmlToJson(String xmlStr) {
        JSONObject jsonObject = XML.toJSONObject(xmlStr);
        return jsonObject.toString();
    }

    /**
     * @Description: JSON字符串 - > XML字符串
     * @Author: Yiang37
     * @Date: 2021/08/12 10:54:12
     * @Version: 1.0
     */
    public static String jsonToXml(String jsonStr) {
        JSONObject jsonObject = new JSONObject(jsonStr);
        String xmlStr = XML.toString(jsonObject);
        return xmlStr;
    }

package com.boclink.utils;

import org.json.JSONObject;
import org.json.XML;

/**
 * @Description: 报文格式转换
 * @Class: MessageConversionUtils
 * @Author: Yiang37
 * @Date: 2021/8/12 10:36
 * @Version: 1.0
 */
public class MessageConversionUtils {
    // 头部追加 <?xml version="1.0" encoding="UTF-8"?>
    final static String HEAD = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>";

    // abc标签后追加 locale=" zh_CN" 
    final static String BLANK = " ";
    final static String ADD_STR = "locale=\"zh_CN\"";


    /**
     * @Description: XML字符串 -> JSON字符串
     * @Author: Yiang37
     * @Date: 2021/08/12 10:53:47
     * @Version: 1.0
     */
    public static String xmlToJson(String xmlStr) {
        JSONObject jsonObject = XML.toJSONObject(xmlStr);
        return jsonObject.toString();
    }

    /**
     * @Description: JSON字符串 - > XML字符串
     * @Author: Yiang37
     * @Date: 2021/08/12 10:54:12
     * @Version: 1.0
     */
    public static String jsonToXml(String jsonStr) {
        JSONObject jsonObject = new JSONObject(jsonStr);
        String xmlStr = XML.toString(jsonObject);
        // abc标签后追加ADD_STR
        String abc = appendXmlTagCon(xmlStr, "abc", ADD_STR);
        return HEAD + abc;
    }

    /**
     * @Description: xml的指定标签后 追加指定字符串
     * @Author: Yiang37
     * @Date: 2021/08/12 11:12:28
     * @Version: 1.0
     */
    public static String appendXmlTagCon(String xmlStr, String tagStr, String appendStr) {
        // 计算标签出现的起始位置
        int begin = xmlStr.indexOf(tagStr);
        if (begin < 0){
            // 未出现该字符串 返回原报文
            return xmlStr;
        }
        // 计算追加字符串时的起始位置
        int i = begin + tagStr.length();
        // 插入追加的字符串
        StringBuilder builder = new StringBuilder(xmlStr).insert(i, BLANK + appendStr);
        return builder + "";
    }
}