spring中实现springMVC

缺乏、安全感 2022-07-12 15:23 27阅读 0赞

1. applicationContext.xml 中:

<?xml version="1.0" encoding="UTF-8"?>    
      
<beans xmlns="http://www.springframework.org/schema/beans"    
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    
       xmlns:aop="http://www.springframework.org/schema/aop"    
       xmlns:tx="http://www.springframework.org/schema/tx"                                 注意：xmlns需要和 xsi  一 一 对应  
       xmlns:context="http://www.springframework.org/schema/context"    
       xmlns:mvc="http://www.springframework.org/schema/mvc"    
       
       xsi:schemaLocation="     
            http://www.springframework.org/schema/beans  
            http://www.springframework.org/schema/beans/spring-beans-2.5.xsd     
            http://www.springframework.org/schema/aop  
            http://www.springframework.org/schema/aop/spring-aop-2.5.xsd     
            http://www.springframework.org/schema/tx  
            http://www.springframework.org/schema/tx/spring-tx-2.5.xsd  
            http://www.springframework.org/schema/context  
            http://www.springframework.org/schema/context/spring-context-2.5.xsd  
            http://www.springframework.org/schema/mvc  
            http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd ">  
  
    <aop:aspectj-autoproxy/>    
     
      
    <context:component-scan base-package="com.yuan"/>     
    
</beans>

2. spring-servlet.xml   (mvc配置)

3. web.xml

<?xml version="1.0" encoding="UTF-8"?>  
<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">  
   
  <servlet>  
    <servlet-name>spring</servlet-name>  
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
    <init-param>  
      <param-name>contextConfigLocation</param-name>  
      <param-value>classpath:spring-servlet.xml</param-value>  
    </init-param>  
    <load-on-startup>1</load-on-startup>  
  </servlet>  
  <servlet-mapping>  
    <servlet-name>spring</servlet-name>  
    <url-pattern>\*.do</url-pattern>  
  </servlet-mapping>  
   
  <listener>  
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
  </listener>  
   
    <context-param>  
    <param-name>contextConfigLocation</param-name>  
    <param-value>classpath:applicationContext.xml</param-value>  
  </context-param>  
   
    
  <welcome-file-list>  
    <welcome-file>index.jsp</welcome-file>  
  </welcome-file-list>  
  
</web-app>

4. controller

package com.yuan.controller;  
  
import org.springframework.beans.factory.annotation.Autowired;  
import org.springframework.stereotype.Controller;  
import org.springframework.web.bind.annotation.RequestMapping;  
  
import com.yuan.bean.Student;  
import com.yuan.service.impl.StudentServiceImpl;  
  
//控制器  
@Controller  
public class LonginController \{  
   
    @Autowired  
    private StudentServiceImpl studentServiceImpl;  
      
    @Autowired  
    private Student s;  
      
    @RequestMapping()  
    public String login()\{  
        return  "index";  
    \}  
      
    @RequestMapping("/show")  
    public void showStudent()\{  
        System.out.println("show...");  
        studentServiceImpl.showStudentName();  
    \}  
\}  
  
5.jsp

<%@ page language="java" import="java.util.\*" pageEncoding="utf-8"%>  
  
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">  
<html>  
  <head>  
      
  </head>  
   
  <body>  
      <form action="/test\_spring/show.do" method="post">  
       用户名:<input type="text" name="name"/><br/>  
       密码:<input type="password" name="passWord"><br/>  
       <input  type="submit" value="提交" />  
      </form>  
  </body>  
</html>  
  
6.注意jar包必须放在 lib 下面 , bean ,dao service 配置上对应的注解就ok了。

<listener>  
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
  </listener>

主要实现，启动web服务器时，自动装配Application*Context 。 装配之后就可以通过 autowried注解活得bean , 不然需要  ApplicationContext ac = new FileSystemXmlApplicationContext("src/applicationContext.xml"); ac.getBean(" ");来获取。*

*====================================================================*

*其他问题：*

*返回给前端 jsonObject 报错 ：*

no suitable HttpMessageConverter

解决：

第一步添加：

public class WxMappingJackson2HttpMessageConverter extends MappingJackson2HttpMessageConverter {
        public WxMappingJackson2HttpMessageConverter(){
            List<MediaType> mediaTypes = new ArrayList<>();
            mediaTypes.add(MediaType.TEXT_PLAIN);
            mediaTypes.add(MediaType.TEXT_HTML);  //加入text/html类型的支持
            setSupportedMediaTypes(mediaTypes);// tag6
        }
    }

第二步：

restTemplate.getMessageConverters().add(new WxMappingJackson2HttpMessageConverter());

参考：

[http://www.wld5.com/javajc/21506.html][http_www.wld5.com_javajc_21506.html]

===================================================================

# spring mvc 请求转发和重定向 #

参考文章：

[https://abelyang.blog.csdn.net/article/details/52103002?utm\_medium=distribute.pc\_relevant.none-task-blog-2%7Edefault%7EOPENSEARCH%7Edefault-19.control&depth\_1-utm\_source=distribute.pc\_relevant.none-task-blog-2%7Edefault%7EOPENSEARCH%7Edefault-19.control][https_abelyang.blog.csdn.net_article_details_52103002_utm_medium_distribute.pc_relevant.none-task-blog-2_7Edefault_7EOPENSEARCH_7Edefault-19.control_depth_1-utm_source_distribute.pc_relevant.none-task-blog-2_7Edefault_7EOPENSEARCH_7Edefault-19.control]

[http_www.wld5.com_javajc_21506.html]: http://www.wld5.com/javajc/21506.html
[https_abelyang.blog.csdn.net_article_details_52103002_utm_medium_distribute.pc_relevant.none-task-blog-2_7Edefault_7EOPENSEARCH_7Edefault-19.control_depth_1-utm_source_distribute.pc_relevant.none-task-blog-2_7Edefault_7EOPENSEARCH_7Edefault-19.control]: https://abelyang.blog.csdn.net/article/details/52103002?utm_medium=distribute.pc_relevant.none-task-blog-2~default~OPENSEARCH~default-19.control&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2~default~OPENSEARCH~default-19.control