springMVC---resultful风格

目录

一、创建项目

pom.xml

二、配置文件

1.web.xml

2.spring-mvc.xml

三、图解

四、controller

---

一、创建项目

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.qcby</groupId><artifactId>springMVC14</artifactId><version>1.0-SNAPSHOT</version><packaging>war</packaging><properties><maven.compiler.source>8</maven.compiler.source><maven.compiler.target>8</maven.compiler.target><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><!--版本锁定--><spring.version>5.0.2.RELEASE</spring.version></properties><dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>${spring.version}</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>2.5</version><scope>provided</scope></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.0</version><scope>provided</scope></dependency></dependencies></project>

二、配置文件

1.web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"version="4.0"><!-- 配置过滤器，解决中文乱码的问题 --><filter><filter-name>characterEncodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><!-- 指定字符集 --><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param></filter><filter-mapping><filter-name>characterEncodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!--前端控制器--><servlet><servlet-name>dispatcherServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring-mvc.xml</param-value></init-param><!--配置启动加载--><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>dispatcherServlet</servlet-name><!--<url-pattern>*.do</url-pattern>--><url-pattern>/</url-pattern></servlet-mapping>
</web-app>

2.spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd"><!-- 配置spring创建容器时要扫描的包 --><context:component-scan base-package="com.qcby.controller"></context:component-scan><!-- 配置视图解析器 --><bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/pages/"></property><property name="suffix" value=".jsp"></property></bean><!-- 配置spring开启注解mvc的支持--><!--    <mvc:annotation-driven></mvc:annotation-driven>-->
</beans>

三、图解

Get对应select（查询）

Post对应insert（添加）

Put对应update（修改）

Delete对应delete（删除）

他们的请求路径一样，是根据不同的请求方式去执行后台的不同方法

四、controller

1.Get和Post请求就是在form表单里设置method="get"/method="post"

2.发起put和delete请求：

（1）有post请求的form标签

（2）在form表单中添加一个额外的隐藏域 _method="put"/_method="delete"

（3）web.xml中配置一个Filter过滤器org.springframework.web.filter.HiddenHttpMethodFilter(注：这个Filter必须要在处理乱码的Filter)

3.web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"version="4.0"><!-- 配置过滤器，解决中文乱码的问题 --><filter><filter-name>characterEncodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><!-- 指定字符集 --><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param></filter><filter-mapping><filter-name>characterEncodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!--负责把隐藏域中的put..，改为请求的put请求..--><filter><filter-name>HiddenHttpMethodFilter</filter-name><filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class></filter><filter-mapping><filter-name>HiddenHttpMethodFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><!--前端控制器--><servlet><servlet-name>dispatcherServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring-mvc.xml</param-value></init-param><!--配置启动加载--><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>dispatcherServlet</servlet-name><!--<url-pattern>*.do</url-pattern>--><url-pattern>/</url-pattern></servlet-mapping>
</web-app>

 controller

package com.qcby.controller;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;@Controller
public class UserController {// 发送Get查询所有@GetMapping("/user")public String getUserAll(){System.out.println("查询所有用户");return "success";}// 发送Get查询一个@GetMapping("/user/{id}")public String getUserById(@PathVariable(value = "id") Integer id){System.out.println("根据id查询用户信息，id："+id);return "success";}// 发送Post--添加@PostMapping("/user")public String UserInsert(String username,String password){System.out.println("添加用户,用户名:"+username+",密码:"+password);return "success";}// 发送put--修改@PutMapping("/user/{id}")public String UserUpdate(@PathVariable(value = "id") Integer id,String username,String password){System.out.println("修改id为"+id+"的用户信息,用户名为:"+username+",密码为:"+password);return "success";}// 发送Delete--删除@DeleteMapping(value = "/user/{id}")public String deleteUserById(@PathVariable String id) {System.out.println("删除id为" + id+"的用户信息");return "success";}
}