SpringMVC的基本使用

布满荆棘的人生 2022-03-31 09:14 239阅读 0赞

# 一.xml模式 #

### springmvc是个啥我就不多说了,c层框架的boss,要使用肯定第一件事就是导jar包 ###

<dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.1.3.RELEASE</version>
    </dependency>

### 然后在项目中的web.xml中加上 ###

<servlet>
        <servlet-name>springMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:mvc-servlet.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>springMVC</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>

### 然后在resources文件夹下弄一个主配置文件  详细看注释 ###

<?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:p="http://www.springframework.org/schema/p"
        xsi:schemaLocation="
            http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.xsd">
        
        <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>
        
        
            
                
                    
                
            
        
        
        <bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping">
        </bean>
        
        <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>
        
        <bean  class="com.hw.controller.StudentController"></bean>
        
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            
            <property name="prefix" value="/views/"></property>
            
            <property name="suffix" value=".jsp"></property>
        </bean>
    </beans>

### 然后贴上控制层的代码 ###

public class StudentController implements Controller {
        @Override
        public ModelAndView handleRequest(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
            ModelAndView view=new ModelAndView("studentlist");//返回的页面
            view.addObject("names","lisi");
            return view;
        }
    }

### 前台 studentlist.jsp代码 ###

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <%@ page pageEncoding="utf-8" isELIgnored="false"%>
    <html>
    <head>
        <title>Title</title>
    </head>
    <body>
    ${names}
    </body>
    </html>

### 示例 ###

![20190102215217504.png][]

# 二.然后看看注解式的开发,简单,方便 #

### 导jar和web.xml的步骤是一样的,不一样的地方在于主配置文件和控制层的代码 ###

### 贴上注解化的主配置文件 ###

### 然后是控制层的代码 ###

package com.hw.controller;
    
    import com.alibaba.fastjson.JSON;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    import java.io.IOException;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    
    @Controller //控制器
    @RequestMapping("/student") //这个是为了分清模块
    public class StudentController {
    
        @RequestMapping("/list")    //链接名
        public String list(){
            System.out.println(1);
            return "/index";    //返回的页面
        }
        //这个为ajax的套路
        @RequestMapping("/list2")
        public void list2(HttpServletRequest request, HttpServletResponse response) throws IOException {
            String str=JSON.toJSONString("ssssss");
            response.getWriter().println(str);
            response.getWriter().flush();
            response.getWriter().close();
        }
    }

### 看看效果 吧 ###

![20190102215826479.png][]

![20190102215833612.png][]

## 点赞或者评论是我最大的动力,有问题欢迎留言或者联系q:1559810637 ##

[20190102215217504.png]: /images/20220331/d474ffbce7fb458cae175a1f8b91a737.png
[20190102215826479.png]: /images/20220331/ef44b33b6b754037bf8e9702404eb100.png
[20190102215833612.png]: /images/20220331/9a387b1bb4674f2db9262dae782c14f2.png