创建一个实体：里面包含需要接受的多种类型的参数。如实体、list集合、单个参数。（因为springMVC无法同时接受这几种参数，需要创建一个实体包含它们来接受）
如接收User(bean里面包含List)集合参数：
1、User实体类：
1.public class User {
2. private String name;
3. private String pwd;
4. private List<User> customers;//属于用户的客户群
5. //省略getter/setter
6.}
2、页面js代码：
1.var customerArray = new Array();
2.customerArray.push({name: "李四",pwd: "123"});
3.customerArray.push({name: "张三",pwd: "332"});
4.var user = {};
5.user.name = "李刚";
6.user.pwd = "888";
7.user. customers = customerArray;
8.$.ajax({
9. type: "POST",
10. url: "<%=path%>/catalog.do?fn=saveUsers",
11. data: JSON.stringify(user),//将对象序列化成JSON字符串
12. dataType:"json",
13. contentType : 'application/json;charset=utf-8', //设置请求头信息
14. success: function(data){
15. …
16. },
17. error: function(res){
18. …
19. }
20.});
3、Controller方法：
1.@Controller
2.@RequestMapping("/catalog.do")
3.public class CatalogController {
4.
5. @RequestMapping(params = "fn=saveUsers")
6. @ResponseBody
7. public AjaxJson saveUsers(@RequestBody User user) {
8. List<User> customers = user.getCustomers();
9. …
10. }
11.}
