Using XStream to convert between JavaBean and Xml/json

XML and JSON are two commonly used formats for data description and transmission today, especially when it comes to JS using JSON quite frequently. Naturally, in the Java world, it is the XStream and json-lib that are the components that JavaBean and the two formats convert to each other. Here I jot down the usage of xstream.

In fact, similar tools have already existed. If you have used DWR comrades, there must be a print, DWR remote method calls can also be completed for you JavaBean and JSON format two-way conversion, depends on its various Converter. If you pay attention to the details of the Struts1, Struts1 's Actionservlet the Commons-digester to complete the conversion of XML to JavaBean when initializing Struts-config.xml. The corresponding Apache also has a commons-betwixt implementation of JavaBean to XML generation.

And I am here to say XStream (http://xstream.codehaus.org) JavaBean and Xml/json between the two-way conversion all realized, and Json-lib as its name, the function is too shabby. To use XStream, download to the XStream package, the current version is 1.3.1. The Xstream-1.x.x.jar is then added to the project's Classpath and is not dependent on other packages. Other packages in the Lib directory are required at certain times, as mentioned below.

Briefly explain the use of XStream, divided into JavaBean-> XML, JavaBean-> JSON, XML-> JavaBean, JSON-> JavaBean several parts of the content. Before starting the example, define three classes (all in the Com.unmi.model package):

01.public　class　Customer　{
02.　　　　private　int　custId;
03.　　　　private　String　custName;
04.　　　　private　List<Order>　orders;
05.　　　　//setter/getter　和构造方法略
06.}
07.
08.public　class　Order　{
09.　　　　private　int　orderId;
10.　　　　private　String　orderName;
11.　　　　private　Product[]　products;
12.　　　　//setter/getter　和构造方法略
13.}
14.
15.public　class　Product　{
16.　　　　private　int　prodId;
17.　　　　private　String　prodName;
18.　　　　private　double　prodPrice;
19.　　　　//setter/getter　和构造方法略
20.}

Customer/order/product, the relationship between them is One-to-many, One-to-many, and for demonstration purposes, the List and array are used as aggregation attributes respectively.

1. JavaBean-> XML

01.public　static　void　main(String[]　args)　{
02.
03.　　　　//构造接近实际的　Customer　对象
04.　　　　Product　p1　=　new　Product(1001,"电脑",4000);
05.　　　　Product　p2　=　new　Product(1002,"空调",2000);
06.　　　　Product[]　prods1　=　new　Product[]{p1,p2};
07.
08.　　　　Order　order1　=　new　Order(101,"电器类",prods1);
09.
10.　　　　List<Order>　orders　=　new　ArrayList<Order>();
11.　　　　orders.add(order1);　
12.　　　　Customer　customer　=　new　Customer(1,"Unmi",orders);
13.
14.　　　　//XStream　xstream　=　new　XStream();
15.　　　　XStream　xstream　=　new　XStream(new　DomDriver());
16.
17.　　　　String　xml　=　xstream.toXML(customer);//转换成　xml　格式
18.
19.　　　　System.out.println(xml);　//输出　xml　字符串
20.}