Struts2回到XML，JSON格式

Struts2返回XML，JSON格式
Java代码??

1. ??

Struts2返回XML格式?
1.struts.xml里面的配置package extends="struts-default"?

1. <action?name="actionName"?class="bookTypeAction"?method="methodName"?>??
2. ????????<result?name="xmlMessage"?type="plaintext"></result>??
3. </action>??

2.Action里面的方法?

1. public?void?xxxMethod()?throws?IOException{?????
2. ?????HttpServletResponse?response?=?ServletActionContext.getResponse();?????????
3. ?????PrintWriter?out?=?response.getWriter();?????????
4. ?????response.setContentType("application/xml;charset=UTF-8");??
5. ?????out.write("XML文档");??
6. }??

Struts2返回Json格式?
1.下载jsonplugin-0.7.jar包?
如果用JSONObject把Object转成JSON字符串的话需要下载下面的包?
?? commons-beanutils-1.7.0.jar?
?? json-lib-2.2.1-jdk15.jar?
?? ezmorph-1.0.4.jar?
2.Action里面的方法?
??

1. HttpServletRequest?request?=ServletActionContext.getRequest();??
2. HttpServletResponse?response?=?ServletActionContext.getResponse();??
3. ??
4. int?bookTypeId?=?Integer.parseInt(request.getParameter("bookTypeId"));??
5. int?num?=?admimService.getDeleteBookTypeCond(bookTypeId);??
6. response.setContentType(ContentType_JSON);??
7. if(num?==?0){??
8. ??boolean?isSuccess?=?true;??
9. ??int?x?=?admimService.deleteBookType(bookTypeId);??
10. ??//这是产生简单的json的方法??
11. ??response.getWriter().write("{success:"+isSuccess+",num:"+num+"}");??
12. }else{??
13. ?response.getWriter().write("{success:false,num:"+num+"}");???
14. }??

如果要把一个对象的实例转成json,建议用JSONObject,?
如：?

1. import?net.sf.json.JSONArray;??
2. import?net.sf.json.JSONObject;??
3. ??
4. ...??
5. ...??
6. ...??
7. /**?
8. ?*?通过bean生成JSON数据?
9. ?*?@param?bean?bean对象?
10. ?*?@return?生成的JSON数据?
11. */??
12. public?static?String?getJsonFromBean(Object?bean){??
13. ?try{??
14. ??????JSONObject?JsonObject?=?JSONObject.fromObject(bean);??
15. ??????return?JsonObject.toString();??
16. ?}catch(Exception?e){??
17. ???e.printStackTrace();??
18. ?}??
19. ?return?null;??
20. }?