一、样例一:
以根据订单号向支付宝查询支付是否成功为例(成功信息)
失败信息:
<?xml version="1.0" encoding="utf-8"?>
<alipay>
<is_success>F</is_success>
<error>TRADE_NOT_EXIST</error>
</alipay>
成功信息:
<?xml version="1.0" encoding="utf-8"?>
<alipay>
<is_success>T</is_success>
<request>
<param name="_input_charset">utf-8</param>
<param name="service">single_trade_query</param>
<param name="partner">2088121424678319</param>
<param name="out_trade_no">H161021114440198N</param>
</request>
<response>
<trade>
<body>订单:T16102111443568</body>
<buyer_email>1176760525@qq.com</buyer_email>
<buyer_id>2088402231747066</buyer_id>
<discount>0.00</discount>
<flag_trade_locked>0</flag_trade_locked>
<gmt_create>2016-10-21 11:45:06</gmt_create>
<gmt_last_modified_time>2016-10-21 11:45:16</gmt_last_modified_time>
<gmt_payment>2016-10-21 11:45:17</gmt_payment>
<is_total_fee_adjust>F</is_total_fee_adjust>
<operator_role>B</operator_role>
<out_trade_no>H161021114440198N</out_trade_no>
<payment_type>1</payment_type>
<price>0.01</price>
<quantity>1</quantity>
<seller_email>pay@gstarcad.com</seller_email>
<seller_id>2088121424678319</seller_id>
<subject>的生活费...</subject>
<time_out>2017-01-20 11:45:17</time_out>
<time_out_type>finishFPAction</time_out_type>
<to_buyer_fee>0.00</to_buyer_fee>
<to_seller_fee>0.01</to_seller_fee>
<total_fee>0.01</total_fee>
<trade_no>2016102121001004060245497067</trade_no>
<trade_status>TRADE_SUCCESS</trade_status>
<use_coupon>F</use_coupon>
</trade>
</response>
<sign>25217c932f49868371a301e3151201a2</sign>
<sign_type>MD5</sign_type>
</alipay>
首先解析is_success字段的值,看看结果是T(成功)还是F(失败),具体就不详细作解释,这里只分析为T时的数据,一定要判断,否则若为F再解析因XML格式不一会报错
Map<Object, Object> map = new HashMap<Object, Object>();
map = XMLUtil.doXMLParse(result);
String is_success = map.get("is_success").toString();
1、工具类XStreamHandle中定义两个方法:
/**
* 实体转xml字符串
* @param obj
* @return
*/
public static String toXml(Object obj) {
XStream xstream = new XStream(new DomDriver("utf8"));
xstream.processAnnotations(obj.getClass()); // 识别obj类中的注解
return xstream.toXML(obj);
}
/**
* 字符串转实体
* @param xmlStr
* @param cls
* @return
*/
public static <T> T toBean(String xmlStr, Class<T> cls) {
XStream xstream = new XStream(new DomDriver());
xstream.processAnnotations(cls);
@SuppressWarnings("unchecked")
T t = (T) xstream.fromXML(xmlStr);
return t;
}
2、根据节点的层级关系定义实体(此为重点)
由*节点alipay建的实体Alipay 类(Alipay -response-trade) request暂时不需要解析可用String接收
省略get,set方法
Alipay 的下级节点response建造类Response
省略get,set方法
Response的下级节点trade建造类
xml中所有的标签都要解析,否则会报错
3、调用
String xml="..."; //xml字符串
Alipay alipay = XStreamHandle.toBean(xml, Alipay.class);
Trade trade = alipay.getResponse().getTrade();
二、样例二
books中有好多book数,有价格,书名,作者
xml样式:
<?xml version="1.0" encoding="utf-8"?>
<books>
<book price="108">
<name>Java编程思想</name>
<author>Bruce Eckel</author>
</book>
<book price="52">
<name>Effective Java</name>
<author>Joshua Bloch</author>
</book>
<book price="118">
<name>Java 7入门经典</name>
<author>Ivor Horton</author>
</book>
</books>
1、工具类还用样例一中的工具类,这里不做重复了
2、根据节点的层级关系定义实体
根据*元素books创建实体
根据子级创建book类
3、调用
String xmlString = "......"; //xml内容
Books books = XStreamHandle.toBean(xmlString, Books.class);
List<Book> booklist = books.getList();
System.out.println(booklist.size());