SpringMvc完成ajax功能
1.加入jackson的jar包
2.在响应的方法上加上@ResponseBody：把java对象转化为json对象
3.方法的返回值可以是对象集合字符串
1 @Controller 2 @RequestMapping("ajax") 3 public class Ajaxcontroller { 4 @RequestMapping("Ajax1") 5 @ResponseBody 6 public String example(String name) { 7 System.out.println(name); 8 return "你好"; 9 } 10 11 @RequestMapping("Ajax2") 12 @ResponseBody 13 public Users example2(String name) { 14 System.out.println(name); 15 Users user = new Users("张三","man",23); 16 return user; 17 } 18 19 @RequestMapping("Ajax3") 20 @ResponseBody 21 public List<Users> example3(String name) { 22 System.out.println(name); 23 List<Users> list=new ArrayList<Users>(); 24 Users user1 = new Users("张三1","man",23); 25 Users user2 = new Users("张三2","man",23); 26 Users user3 = new Users("张三3","man",23); 27 Users user4 = new Users("张三4","man",23); 28 list.add(user1); 29 list.add(user2); 30 list.add(user3); 31 list.add(user4); 32 return list; 33 }
4.返回字符串时会有乱码，解决办法
第一种：在@RequestMapping后写入(value="Ajax1",produces="text/html;charset=UTF-8")。代码如下：
1 @RequestMapping(value="Ajax1",produces="text/html;charset=UTF-8") 2 @ResponseBody 3 public String example(String name) { 4 System.out.println(name); 5 return "你好"; 6 }
第二种：在springMVC配置文件中通过org.springframework.web.servlet.view.InternalResourceViewResolver类重写代码编码。代码如下：
1 <mvc:annotation-driven> 2 <mvc:message-converters> 3 <bean class="org.springframework.http.converter.StringHttpMessageConverter"> 4 <constructor-arg index="0" value="utf-8"></constructor-arg> 5 </bean> 6 </mvc:message-converters> 7 </mvc:annotation-driven>
