处理器方法的返回值

处理器方法的返回值：

ModelAndView：既要传递数据又要跳转资源
String 跳转字符资源，不能传递数据，可以用model、map、modelmap来承载数据

void

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-1.7.2.min.js"></script>
 8 <script type="text/javascript">
 9     $(function(){
10         $("#myButton").click(function(){
11             $.ajax({
12                 url:"${pageContext.request.contextPath}/springmvc/hello",
13                 type: "POST",
14                 success: function(data){
15                     var data1 = eval("("+data+")");
16                     alert(data1.flavor);
17                 }
18             })
19         })
20         
21     })
22 </script>
23 <title>Insert title here</title>
24 </head>
25 <body>
26     <button id="myButton">点击我呀！</button>
27 </body>
28 </html>

 1 package com.bjsxt.handlers;
 2 
 3 import java.io.IOException;
 4 
 5 import javax.servlet.http.HttpServletResponse;
 6 
 7 import org.springframework.context.annotation.Scope;
 8 import org.springframework.stereotype.Controller;
 9 import org.springframework.web.bind.annotation.RequestMapping;
10 
11 //后台控制器
12 @Controller
13 @Scope("prototype")
14 @RequestMapping("/springmvc")
15 public class MyController{
16 //接收json字符串封装成对象
17 @RequestMapping(value="/hello",produces="text/html;charset=utf-8")
18 public void hello1(HttpServletResponse response) throws IOException{
19     String json="{\"name\":\"weilong\",\"flavor\":\"hot\"}";
20     response.getWriter().print(json);
21 }
22     
23 }

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xmlns:context="http://www.springframework.org/schema/context" 
 5     xmlns:mvc="http://www.springframework.org/schema/mvc"
 6     xmlns:tx="http://www.springframework.org/schema/tx"
 7     xmlns:aop="http://www.springframework.org/schema/aop"
 8     xsi:schemaLocation="
 9         http://www.springframework.org/schema/beans 
10         http://www.springframework.org/schema/beans/spring-beans.xsd
11         http://www.springframework.org/schema/tx 
12         http://www.springframework.org/schema/tx/spring-tx.xsd
13         http://www.springframework.org/schema/aop 
14         http://www.springframework.org/schema/aop/spring-aop.xsd
15         http://www.springframework.org/schema/mvc
16         http://www.springframework.org/schema/mvc/spring-mvc.xsd
17         http://www.springframework.org/schema/context 
18         http://www.springframework.org/schema/context/spring-context.xsd">
19     <!-- 注册组件扫描器 -->
20     <context:component-scan base-package="com.bjsxt.handlers"></context:component-scan>
21     <!-- 注册注解驱动 -->
22     <mvc:annotation-driven/>
23     <!-- 注册视图解析器 -->
24     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
25         <property name="prefix" value="/jsp/"></property>
26         <property name="suffix" value=".jsp"></property>
27     </bean>
28         
29     <!-- 静态资源无法访问第二种解决方案 -->
30     <!-- <mvc:default-servlet-handler/> -->
31     <!-- 静态资源无法访问第三种解决方案 -->
32     <mvc:resources location="/images/" mapping="/images/**"></mvc:resources>
33     <mvc:resources location="/js/" mapping="/js/**"></mvc:resources>
34 </beans>

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
 3   <display-name>springmvc-01-primary</display-name>
 4   <welcome-file-list>
 5     <welcome-file>index.jsp</welcome-file>
 6   </welcome-file-list>
 7   <!-- 静态资源无法访问第一种解决方案 -->
 8   <!-- 
 9   <servlet-mapping>
10       <servlet-name>default</servlet-name>
11       <url-pattern>*.png</url-pattern>
12   </servlet-mapping>
13   <servlet-mapping>
14       <servlet-name>default</servlet-name>
15       <url-pattern>*.js</url-pattern>
16   </servlet-mapping>
17   <servlet-mapping>
18       <servlet-name>default</servlet-name>
19       <url-pattern>*.css</url-pattern>
20   </servlet-mapping>
21    -->
22   <!-- 注册springmvc前端控制器（中央调度器） -->
23   <servlet>
24       <servlet-name>springmvc</servlet-name>
25       <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
26       <!-- 指定springmvc配置文件的路径以及名称 -->
27       <init-param>
28           <param-name>contextConfigLocation</param-name>
29           <param-value>classpath:springmvc.xml</param-value>
30       </init-param>
31   </servlet>
32   <servlet-mapping>
33       <servlet-name>springmvc</servlet-name>
34       <url-pattern>/</url-pattern>
35   </servlet-mapping>
36 </web-app>

Object(涉及注解@ResponseBody,注册mvc注解驱动，导入jackson2.5包)

 1 package com.bjsxt.handlers;
 2 
 3 import org.springframework.context.annotation.Scope;
 4 import org.springframework.stereotype.Controller;
 5 import org.springframework.web.bind.annotation.RequestMapping;
 6 import org.springframework.web.bind.annotation.ResponseBody;
 7 
 8 //后台控制器
 9 @Controller
10 @Scope("prototype")
11 @RequestMapping("/springmvc")
12 public class MyController{
13 //接收json字符串封装成对象
14 @RequestMapping(value="/hello",produces="text/html;charset=utf-8")
15 @ResponseBody
16 public Object hello1() {
17     return "aaa";
18 }
19     
20 }

 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-1.7.2.min.js"></script>
 8 <script type="text/javascript">
 9     $(function(){
10         $("#myButton").click(function(){
11             $.ajax({
12                 url:"${pageContext.request.contextPath}/springmvc/hello",
13                 type: "POST",
14                 success: function(data){
15                     alert(data);
16                 }
17             })
18         })
19         
20     })
21 </script>
22 <title>Insert title here</title>
23 </head>
24 <body>
25     <button id="myButton">点击我呀！</button>
26 </body>
27 </html>

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xmlns:context="http://www.springframework.org/schema/context" 
 5     xmlns:mvc="http://www.springframework.org/schema/mvc"
 6     xmlns:tx="http://www.springframework.org/schema/tx"
 7     xmlns:aop="http://www.springframework.org/schema/aop"
 8     xsi:schemaLocation="
 9         http://www.springframework.org/schema/beans 
10         http://www.springframework.org/schema/beans/spring-beans.xsd
11         http://www.springframework.org/schema/tx 
12         http://www.springframework.org/schema/tx/spring-tx.xsd
13         http://www.springframework.org/schema/aop 
14         http://www.springframework.org/schema/aop/spring-aop.xsd
15         http://www.springframework.org/schema/mvc
16         http://www.springframework.org/schema/mvc/spring-mvc.xsd
17         http://www.springframework.org/schema/context 
18         http://www.springframework.org/schema/context/spring-context.xsd">
19     <!-- 注册组件扫描器 -->
20     <context:component-scan base-package="com.bjsxt.handlers"></context:component-scan>
21     <!-- 注册注解驱动 -->
22     <mvc:annotation-driven/>
23     <!-- 注册视图解析器 -->
24     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
25         <property name="prefix" value="/jsp/"></property>
26         <property name="suffix" value=".jsp"></property>
27     </bean>
28         
29     <!-- 静态资源无法访问第二种解决方案 -->
30     <!-- <mvc:default-servlet-handler/> -->
31     <!-- 静态资源无法访问第三种解决方案 -->
32     <mvc:resources location="/images/" mapping="/images/**"></mvc:resources>
33     <mvc:resources location="/js/" mapping="/js/**"></mvc:resources>
34 </beans>

posted @ 2018-12-25 15:31 wq9 阅读(165) 评论(0) 编辑收藏举报

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处理器方法的返回值

处理器方法的返回值：

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