【SpringMVC】异步发送表单数据到JavaBean，并响应JSON文本返回（十七）

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1）提交表单后，将JavaBean信息以JSON文本形式返回到浏览器

bean2json.jsp

<form>编号：<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="异步提交注册"/></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"/>        <!-- 配适器 -->      <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">      <property name="messageConverters">         <list>      <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/>         </list>      </property>      </bean>

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