Java -＞ Json -＞ xml 格式之间转换

Java -> Json -> xml 格式之间转换

需求
获取xml报文  读取xml数据转换json  推送json数据给第三方
生成对应xml报文 ftp提交服务器

json-lib和fastjson在实现时都出现了意外情况后放弃
json转xml时不识别对应标签   单个数组标签会丢失数组变成对象
对接海关xml报文需求时 标签顺序乱了
转换不了命名空间属性和普通标签属性

记录dom4j  gson实现记录
记录参数配置
普通参数 例： head 、body
属性参数和命令空间参数： -xmlns    
根元素： sourceData 

实现 xml中标签属性的插入 和命令空间属性的插入
webservice例子如下

   
   
      
         
         广东
      
   

普通xml报文如下

   

   
      
         mw
      
   

public static String jsonToXml(Object json, String rootKey) {
    Document document = DocumentHelper.createDocument();
    //设置根节点和命名空间
    QName qName = new QName(rootKey);
    //设置命令空间
    Element element = document.addElement(qName);
    document.setRootElement(element);

    ObjectMapper objectMapper = new ObjectMapper();
    try {
        JsonObject jsonObject = new JsonParser().parse(objectMapper.writeValueAsString(json)).getAsJsonObject();
        toXml(jsonObject, document.getRootElement(), null);
        return document.asXML();
    } catch (Exception e) {
        log.error(e.getMessage());
        throw new AppException(e.getMessage());
    }
}

private static Element toXml(JsonElement jsonElement, Element parentElement, String name) {
    if (jsonElement instanceof JsonArray) {
        //是json数据，需继续解析
        JsonArray sonJsonArray = (JsonArray)jsonElement;
        for (int i = 0; i < sonJsonArray.size(); i++) {
            JsonElement arrayElement = sonJsonArray.get(i);
            toXml(arrayElement, parentElement, name);
        }
    }else if (jsonElement instanceof JsonObject) {
        //说明是一个json对象字符串，需要继续解析
        JsonObject sonJsonObject = (JsonObject) jsonElement;
        Element currentElement = null;
        if (name != null) {
            currentElement = parentElement.addElement(name);
        }
        Set> set = sonJsonObject.entrySet();
        for (Map.Entry s : set) {
            toXml(s.getValue(), currentElement != null ? currentElement : parentElement, s.getKey());
        }
    }else if (jsonElement.isJsonNull()){
        parentElement.addElement(name);
    }else {
        //说明是一个键值对的key,可以作为节点插入了
        addAttribute(parentElement, name, jsonElement.getAsString());
    }
    return parentElement;
}

private static void addAttribute(Element element, String name, String value) {
    //增加子节点，并为子节点赋值
    if (String.valueOf(name.charAt(0)).equals(StringPool.DASH)){

        // 参数前为 “-”符号的为节点属性 去除“-”符号并添加属性
        String key=name.substring(1);
        if (key.equals("xmlns")){
            Namespace namespace=new Namespace("",value);
            QName qName=new QName(element.getName(),namespace);
            element.setQName(qName);
        }else {
            element.addAttribute(key,value);
        }
    }else {
        Element el = element.addElement(name);
        el.addText(value);
    }
}

额外记录
mybatisplus StringPool常用符号常量

String AMPERSAND = "&";
    String AND = "and";
    String AT = "@";
    String ASTERISK = "*";
    String STAR = "*";
    String BACK_SLASH = "\";
    String COLON = ":";
    String COMMA = ",";
    String DASH = "-";
    String DOLLAR = "$";
    String DOT = ".";
    String DOTDOT = "..";
    String DOT_CLASS = ".class";
    String DOT_JAVA = ".java";
    String DOT_XML = ".xml";
    String EMPTY = "";
    String EQUALS = "=";
    String FALSE = "false";
    String SLASH = "/";
    String HASH = "#";
    String HAT = "^";
    String LEFT_BRACE = "{";
    String LEFT_BRACKET = "(";
    String LEFT_CHEV = "<";
    String DOT_NEWLINE = ",n";
    String NEWLINE = "n";
    String N = "n";
    String NO = "no";
    String NULL = "null";
    String OFF = "off";
    String ON = "on";
    String PERCENT = "%";
    String PIPE = "|";
    String PLUS = "+";
    String QUESTION_MARK = "?";
    String EXCLAMATION_MARK = "!";
    String QUOTE = """;
    String RETURN = "r";
    String TAB = "t";
    String RIGHT_BRACE = "}";
    String RIGHT_BRACKET = ")";
    String RIGHT_CHEV = ">";
    String SEMICOLON = ";";
    String SINGLE_QUOTE = "'";
    String BACKTICK = "`";
    String SPACE = " ";
    String TILDA = "~";
    String LEFT_SQ_BRACKET = "[";
    String RIGHT_SQ_BRACKET = "]";
    String TRUE = "true";
    String UNDERSCORE = "_";
    String UTF_8 = "UTF-8";
    String US_ASCII = "US-ASCII";
    String ISO_8859_1 = "ISO-8859-1";
    String Y = "y";
    String YES = "yes";
    String ONE = "1";
    String ZERO = "0";
    String DOLLAR_LEFT_BRACE = "${";
    String HASH_LEFT_BRACE = "#{";
    String CRLF = "rn";
    String HTML_NBSP = " ";
    String HTML_AMP = "&";
    String HTML_QUOTE = """;
    String HTML_LT = "<";
    String HTML_GT = ">";
    String[] EMPTY_ARRAY = new String[0];
    byte[] BYTES_NEW_LINE = "n".getBytes();