1） 提交表單後，將JavaBean資訊以JSON文字形式返回到瀏覽器

bean2json.jsp

<form>
編號：<input type="text" name="id" value="1"/><br/>
姓名：<input type="text" name="name" value="哈哈"/><br/>
薪水：<input type="text" name="sal" value="5000"/><br/>
<input type="button" value="非同步提交註冊"/>
</form>
<script type="text/javascript">
$(":button").click(function(){
var url = "${pageContext.request.contextPath}/user/add.action";
var sendData = {
"id":1,
"name":"哈哈",
"sal":5000
};
$.post(url,sendData,function(backData,textStatus,ajax){
alert(ajax.responseText);
});
});
</script>
 

    User.java

public class User {
private Integer id;
private String name;
private Double sal;
public User(){}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Double getSal() {
return sal;
}
public void setSal(Double sal) {
this.sal = sal;
}
}
 

UserAction.java

@Controller
@RequestMapping(value="/user")
public class UserAction {
 
@RequestMapping(value="/add")
public @ResponseBody User add(User user) throws Exception{
System.out.println(user.getId()+":"+user.getName()+":"+user.getSal());
return user;
}
}

spring.xml

  <!-- Action控制器 -->
  <context:component-scan base-package="cn.itcast.javaee.springmvc.app25"/>  
 
 
  	  <!-- 配適器 -->
      <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
      	<property name="messageConverters">
      	   	<list>
      	<bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/>
      	   	</list>
      	</property>
      </bean>