SSM框架之Mybatis
0. 老版本Spring官方文档 https://docs.spring.io/spring-framework/docs/4.3.24.RELEASE/spring-framework-reference/html/
1. SpringMVC
2. HelloSpringMVC 配置版本springmvc-02-mymvc
- 2.1. 新建一个module，添加web支持！
- 2.2. 确定导入了SpringMVC的依赖！
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<?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.xiaofan</groupId> <artifactId>SpringMVC</artifactId> <packaging>pom</packaging> <version>1.0-SNAPSHOT</version> <modules> <module>springmvc-01-servlet</module> <module>springmvc-02-mymvc</module> </modules> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.1.9.RELEASE</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> </dependencies> </project> |
- 2.3. 配置web.xml， 注册DispatcherServlet！
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<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="https://jakarta.ee/xml/ns/jakartaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee https://jakarta.ee/xml/ns/jakartaee/web-app_5_0.xsd" version="5.0"> <!--配置DispatcherServlet： 这个是SpringMVC的核心，请求分发器，前端控制器--> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!--DispatcherServlet要绑定spring的配置文件--> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc-servlet.xml</param-value> </init-param> <!--启动级别 1--> <load-on-startup>1</load-on-startup> </servlet> <!--/: 只匹配所有的请求，不会去匹配jsp页面--> <!--/*: 配所有的请求，包括jsp页面--> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app> |
- 2.4. 编写SpringMVC的配置文件 springmvc-servlet.xml : [servletname]-servlet.xml 说明，这里的名称是按照官方来的
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<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd"> <!--处理器映射器--> <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/> <!--处理器适配器--> <bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"/> <!--处理器解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="InternalResourceViewResolver"> <!--前缀--> <property name="prefix" value="/WEB-INF/jsp/"/> <!--后缀--> <property name="suffix" value=".jsp"/> </bean> <!--BeanNameUrlHandlerMapping:bean--> <bean id="/hello" class="com.xiaofan.controller.HelloController"/> </beans> |
- 2.5. 添加处理映射器
- 2.6. 添加处理器适配器
- 2.7. 添加视图解析器
- 2.8. 编写我们要操作业务Controller，要么实现Controller接口， 要么增加注解；需要返回一个ModelAndView，装数据，封视图；
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package com.xiaofan.controller; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.Controller; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class HelloController implements Controller { @Override public ModelAndView handleRequest(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception { ModelAndView modelAndView = new ModelAndView(); // 业务代码 String result = "hello springmvc!"; modelAndView.addObject("msg", result); // 跳转视图 modelAndView.setViewName("test"); return modelAndView; } } |
- 2.9. 将自己的类交给SpringIOC容器，注册bean
- 2.10. 写需要跳转的jsp页面，显示ModelandView存放的数据，以及我们的正常页面；
- 2.11. 配置Tomcat启动测试！
3. SpringMVC执行原理
4. SpringMVC注解版本springmvc-03-annotation
- web.xml
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<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="https://jakarta.ee/xml/ns/jakartaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee https://jakarta.ee/xml/ns/jakartaee/web-app_5_0.xsd" version="5.0"> <!--配置DispatcherServlet： 这个是SpringMVC的核心，请求分发器，前端控制器--> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!--DispatcherServlet要绑定spring的配置文件--> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc-servlet.xml</param-value> </init-param> <!--启动级别 1--> <load-on-startup>1</load-on-startup> </servlet> <!--/: 只匹配所有的请求，不会去匹配jsp页面--> <!--/*: 配所有的请求，包括jsp页面--> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app> |
- springmvc-servlet.xml
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<?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:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--自动扫描包， 让指定包下的注解生效，由IOC容器统一管理--> <context:component-scan base-package="com.xiaofan.controller"/> <!--让Spring MVC不处理静态资源 .css .js .html .mp3 .mp4--> <mvc:default-servlet-handler /> <!--支持mvc注解驱动 在spring中一般采用@RequestMapping注解完成映射关系， 要想使@RequestMapping注解生效，必须向上下文注册DefaultAnnotationHandlerMapping 和一个AnnotationMethodHandlerAdapter实例，这两个实例分别在类级别和方法级别处理， 而annotation-driven配置帮助我们自动完成上述两个实例的注入--> <mvc:annotation-driven /> <!--处理器解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="InternalResourceViewResolver"> <!--前缀--> <property name="prefix" value="/WEB-INF/jsp/"/> <!--后缀--> <property name="suffix" value=".jsp"/> </bean> </beans> |
- HelloController.java
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package com.xiaofan.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; @Controller public class HelloController { @RequestMapping("/hello") public String hello(Model model) { // 封装数据 model.addAttribute("msg", "hello SpringMVCAnnotation!"); // 会被视图解析器处理 return "hello"; } } |
- hello.jsp
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<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> ${msg} </body> </html> |
5. RestFul 风格springmvc-04-controller
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package com.xiaofan.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestMapping; @Controller public class RestFulController { // http://localhost:8080/springmvc_04_controller_war_exploded/add/1/22 @GetMapping("/add/{a}/{b}") public String test1(@PathVariable int a, @PathVariable int b, Model model) { int res = a + b; model.addAttribute("msg", "结果为1：" + res); return "test"; } @PostMapping("/add/{a}/{b}") public String test2(@PathVariable int a, @PathVariable int b, Model model) { int res = a + b; model.addAttribute("msg", "结果为2：" + res); return "test"; } } |
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<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <%--模仿post方式 RestFul风格提交--%> <form action="/springmvc_04_controller_war_exploded/add/1/20" method="post"> <input type="submit"> </form> </body> </html> |
6. 转发和重定向
- 无视图解析器
- 有视图解析器
7. 接收请求数据及数据回显
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package com.xiaofan.controller; import com.xiaofan.pojo.User; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; @Controller @RequestMapping("/user") public class UserController { // localhost:8080/user/t1?username=xxx @GetMapping("/t1") public String test1(@RequestParam("username") String name, Model model) { System.out.println("接收到的前端参数：" + name); model.addAttribute("msg", name); return "test"; } // 接收一个对象 http://localhost:8080/springmvc_04_controller_war_exploded/user/t2?name=xiaofan&age=3&id=999 @GetMapping("/t2") public String test2(User user, Model model) { System.out.println("接收到的前端参数：" + user); model.addAttribute("msg", user); return "test"; } } |
8. 乱码问题解决
- 配置spring过滤器
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<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="https://jakarta.ee/xml/ns/jakartaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee https://jakarta.ee/xml/ns/jakartaee/web-app_5_0.xsd" version="5.0"> <!--配置DispatcherServlet： 这个是SpringMVC的核心，请求分发器，前端控制器--> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!--DispatcherServlet要绑定spring的配置文件--> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc-servlet.xml</param-value> </init-param> <!--启动级别 1--> <load-on-startup>1</load-on-startup> </servlet> <!--/: 只匹配所有的请求，不会去匹配jsp页面--> <!--/*: 配所有的请求，包括jsp页面--> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!--配饰SpringMVC的乱码过滤--> <filter> <filter-name>encoding</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app> |
- form.jsp
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<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <form action="/e/t1" method="post"> <input type="text" name="name"> <input type="submit"/> </form> </body> </html> |
- EncodingController.java
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package com.xiaofan.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.PostMapping; @Controller public class EncodingController { // 过滤器解决乱码 @PostMapping("/e/t1") public String test1(String name, Model model) { System.out.println(name); model.addAttribute("msg", name); return "test"; } } |
- tomcat.server
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<Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" URIEncoding="utf-8"/> |
9. JSONspringmvc-05-json
- fastjson
- json乱码问题
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<?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:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--自动扫描包， 让指定包下的注解生效，由IOC容器统一管理--> <context:component-scan base-package="com.xiaofan.controller"/> <!--让Spring MVC不处理静态资源 .css .js .html .mp3 .mp4--> <mvc:default-servlet-handler /> <!--支持mvc注解驱动 在spring中一般采用@RequestMapping注解完成映射关系， 要想使@RequestMapping注解生效，必须向上下文注册DefaultAnnotationHandlerMapping 和一个AnnotationMethodHandlerAdapter实例，这两个实例分别在类级别和方法级别处理， 而annotation-driven配置帮助我们自动完成上述两个实例的注入--> <mvc:annotation-driven> <mvc:message-converters register-defaults="true"> <bean class="org.springframework.http.converter.StringHttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>text/html;charset=UTF-8</value> <value>application/json;charset=UTF-8</value> </list> </property> </bean> </mvc:message-converters> </mvc:annotation-driven> <!--处理器解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="InternalResourceViewResolver"> <!--前缀--> <property name="prefix" value="/WEB-INF/jsp/"/> <!--后缀--> <property name="suffix" value=".jsp"/> </bean> </beans> |
10. 拦截器springmvc-07-interceptor
11. 文件上传下载
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