xml转为json，并解析json

最新推荐文章于 2022-03-28 18:17:04 发布

原创最新推荐文章于 2022-03-28 18:17:04 发布 · 2.1k 阅读

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#java xml json

本文介绍了一种使用Java实现的XML文件解析成JSON格式的方法，通过SAX解析器结合JDOM2和FastJSON库，实现了从XML数据到JSON数据的转换，并提供了完整的代码示例。

开篇：一般公司的项目，很多是返回xml报文，如何将xml解析为json，这里采用一种方法，sax解析方式

一.maven 依赖

<dependency>
    <groupId>org.jdom</groupId>
   <artifactId>jdom2</artifactId>
   <version>2.0.6</version>
</dependency>
<dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>fastjson</artifactId>
   <version>1.2.46</version>
</dependency>

二.代码如下

public class TestXml2Json {
    public static void main(String[] args) throws JDOMException, IOException {
        String xml="<?xml version=\"1.0\" encoding=\"utf-8\" ?>" +
                "<MoBaoAccount MessageType=\"UserMobilePay\" PlatformID=\"b2ctest\">" +
                "<OrderNo>M20150521084825</OrderNo>" +
                "<TradeAmt>5000.00</TradeAmt>" +
                "<Commission>0.5</Commission>" +
                "<UserID>zhangbingfa</UserID>" +
                "<MerchID>zhangbingfa</MerchID>" +
                "<tradeType>0</tradeType>" +
                "<CustParam>123</CustParam> " +
                "</MoBaoAccount>";
        //解析xml文档
        JSONObject json=xml2Json(xml.getBytes());
        //解析json数据
        JSONObject moBaoAccount = (JSONObject) json.get("MoBaoAccount");
        List commission = (List) moBaoAccount.get("Commission");
        Order order = new Order();
        //封装为自定义对象
        order.setCommission((String) commission.get(0));
        System.out.println(order.getOrderNo()+">>>>>>>>>"+order.getCommission()+">>>>>>>"+order.getTradeAmt());
        System.out.println(json.toJSONString());

    }

    public static JSONObject xml2Json(byte[] xml) throws JDOMException, IOException {
        JSONObject jsonObject = new JSONObject();
        //将字符串转换为输入流
        InputStream is = new ByteArrayInputStream(xml);
        //用sax解析，解析一行丢一行
        SAXBuilder saxBuilder = new SAXBuilder();
        //获得xml文档
        Document document = saxBuilder.build(is);
        //获得根元素，例如xml
        Element rootElement = document.getRootElement();
        //调用具体解析方法
        jsonObject.put(rootElement.getName(),iterateElement(rootElement));
        return jsonObject;
    }

    private static JSONObject iterateElement(Element rootElement) {
        //获得所有子元素的集合
        List note = rootElement.getChildren();
        Element et;
        JSONObject jsonObject = new JSONObject();
        List list;
        for(int i=0;i<note.size();i++){
            list = new LinkedList();
            et = (Element) note.get(i);
            //此处是从>解析到<，如果有嵌套的子节点，则递归遍历
            if(et.getTextTrim().equals("")){
                if(et.getChildren().size() == 0) continue;
                //有这个键，则用最新的值替换
                if(jsonObject.containsKey(et.getName())){
                    list = (List)jsonObject.get(et.getName());
                }
                list.add(iterateElement(et));
                jsonObject.put(et.getName(),list);
            }else{
                if(jsonObject.containsKey(et.getName())){
                    list = (List)jsonObject.get(et.getName());
                }
                //获得值，例如<a>1</a>,得到1
                list.add(et.getTextTrim());
                jsonObject.put(et.getName(),list);
            }
        }
        return jsonObject;
    }
}
class Order{
    private String OrderNo;
    private String TradeAmt;
    private String Commission;

    public String getOrderNo() {
        return OrderNo;
    }

    public void setOrderNo(String orderNo) {
        OrderNo = orderNo;
    }

    public String getTradeAmt() {
        return TradeAmt;
    }

    public void setTradeAmt(String tradeAmt) {
        TradeAmt = tradeAmt;
    }

    public String getCommission() {
        return Commission;
    }

    public void setCommission(String commission) {
        Commission = commission;
    }
}

三，结果如下

{
"MoBaoAccount": {
"MerchID": ["zhangbingfa"],
"UserID": ["zhangbingfa"],
"Commission": ["0.5"],
"OrderNo": ["M2015052198456"],
"TradeAmt": ["5000.00"],
"CustParam": ["321"],
"tradeType": ["0"]
}

}