SSM的最后一剑-SpringMVC

  <dependency>
      <groupId>junitgroupId>
      <artifactId>junitartifactId>
      <version>4.11version>
    dependency>

    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-coreartifactId>
      <version>5.1.5.RELEASEversion>
    dependency>

    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-webmvcartifactId>
      <version>5.1.5.RELEASEversion>
    dependency>

    <dependency>
      <groupId>org.mybatisgroupId>
      <artifactId>mybatisartifactId>
      <version>3.4.6version>
    dependency>

    
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-contextartifactId>
      <version>5.1.5.RELEASEversion>
    dependency>

    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-beansartifactId>
      <version>5.1.5.RELEASEversion>
    dependency>

    
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-jdbcartifactId>
      <version>5.1.5.RELEASEversion>
    dependency>

    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-txartifactId>
      <version>5.1.5.RELEASEversion>
    dependency>

    
    <dependency>
      <groupId>org.mybatisgroupId>
      <artifactId>mybatis-springartifactId>
      <version>2.0.2version>
    dependency>

    
    <dependency>
      <groupId>com.alibabagroupId>
      <artifactId>druidartifactId>
      <version>1.1.13version>
    dependency>

    <dependency>
      <groupId>mysqlgroupId>
      <artifactId>mysql-connector-javaartifactId>
      <version>5.1.47version>
    dependency>

    <dependency>
      <groupId>org.projectlombokgroupId>
      <artifactId>lombokartifactId>
      <version>1.18.12version>
    dependency>
    <dependency>
      <groupId>org.aspectjgroupId>
      <artifactId>aspectjrtartifactId>
      <version>1.8.8version>
    dependency>

    <dependency>
      <groupId>org.aspectjgroupId>
      <artifactId>aspectjweaverartifactId>
      <version>1.8.3version>
    dependency>

    <dependency>
      <groupId>org.slf4jgroupId>
      <artifactId>slf4j-log4j12artifactId>
      <version>1.7.25version>
    dependency>

    
    <dependency>
      <groupId>log4jgroupId>
      <artifactId>log4jartifactId>
      <version>1.2.17version>
    dependency>

    <dependency>
      <groupId>javax.servletgroupId>
      <artifactId>javax.servlet-apiartifactId>
      <version>3.1.0version>
      <scope>providedscope>
    dependency>

    
    <dependency>
      <groupId>javax.servletgroupId>
      <artifactId>jstlartifactId>
      <version>1.2version>
    dependency>

    
    <dependency>
      <groupId>javax.servlet.jspgroupId>
      <artifactId>javax.servlet.jsp-apiartifactId>
      <version>2.3.1version>
      <scope>providedscope>
    dependency>

<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 http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">


  <context:component-scan base-package="com.lin.controller"/>





  <mvc:annotation-driven />
  
  <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/"/>
    <property name="suffix" value=".jsp"/>
  bean>
beans>

<web-app>
  <display-name>Archetype Created Web Applicationdisplay-name>


  <servlet>
    <servlet-name>springmvcservlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
    <init-param>

      <param-name>contextConfigLocationparam-name>
      <param-value>classpath:springmvc.xmlparam-value>
    init-param>
  servlet>
  <servlet-mapping>

    <servlet-name>springmvcservlet-name>
    <url-pattern>/url-pattern>
  servlet-mapping>
web-app>

package com.lin.controller;

import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * @author XiaoLin
 * @date 2021/2/17 17:09
 */
@Controller
public class HellowController {

  /**
      * @Description:第一个springmvc测试类
      * @author XiaoLin
      * @date 2021/2/17
      * @Param: [username, password]
      * @return java.lang.String
      */
     /*
      RequestMapping的修饰范围：可以用在类上和方法上，他的作用如下：
      1. 用在方法上可以给当前方法加入指定的请求路径
      2. 用在类上可以给类中的所有方法都加入一个统一的请求路径，在这个方法访问之前都必须加上
      */
  @RequestMapping("/hello")
  public String hello(String username,String password){
    System.out.println("hello");
    return "index";
  }
}

@Controller
@RequestMapping("forwoartAndRedirect")
public class TestForwoartAndRedirect {

  @RequestMapping("test")
  public String test(){
    System.out.println("test");
    return"index";
  }
}

// 接收名字为name的参数
request.getParameter(name)

package com.filter;

import javax.servlet.*;
import java.io.IOException;

//自定义编码filter
public class CharacterEncodingFilter  implements Filter {

    private String encoding;
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        this.encoding = filterConfig.getInitParameter("encoding");
        System.out.println(encoding);
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        request.setCharacterEncoding(encoding);
        response.setCharacterEncoding(encoding);
        chain.doFilter(request,response);
    }

    @Override
    public void destroy() {

    }
}

  <filter>
    <filter-name>charsetfilter-name>
    <filter-class>com.filter.CharacterEncodingFilterfilter-class>
    <init-param>
      <param-name>encodingparam-name>
      <param-value>UTF-8param-value>
    init-param>
  filter>

  <filter-mapping>
    <filter-name>charsetfilter-name>
    <url-pattern>/*url-pattern>
  filter-mapping>

  <filter>
    <filter-name>charsetfilter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
    <init-param>
      <param-name>encodingparam-name>
      <param-value>UTF-8param-value>
    init-param>
  filter>

  <filter-mapping>
    <filter-name>charsetfilter-name>
    <url-pattern>/*url-pattern>
  filter-mapping>

package com.filter;

import javax.servlet.*;
import java.io.IOException;

//自定义编码filter
public class CharacterEncodingFilter  implements Filter {

    private String encoding;
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        this.encoding = filterConfig.getInitParameter("encoding");
        System.out.println(encoding);
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        request.setCharacterEncoding(encoding);
        response.setCharacterEncoding(encoding);
        chain.doFilter(request,response);
    }

    @Override
    public void destroy() {

    }
}

<web-app xmlns="http://java.sun.com/xml/ns/javaee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
                        http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
  version="3.0">
  
  <servlet>
    <servlet-name>dispatcherServletservlet-name>
    <servlet-
      class>org.springframework.web.servlet.DispatcherServletservlet-class>
    
    <init-param>
      <param-name>contextConfigLocationparam-name>
      <param-value>classpath:mvc.xmlparam-value>
    init-param>
    
    <load-on-startup>1load-on-startup>
  servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServletservlet-name>
    <url-pattern>/url-pattern>
  servlet-mapping>
web-app>

    Tomcat 容器处理静态资源是交由内置 DefaultServlet 来处理的（拦截路径是 /），处理 JSP 资源是交由内置的 JspServlet 处理的（拦截路径是*.jsp | *.jspx）。
    启动项目时，先加载容器的 web.xml，而后加载项目中的 web.xml。当拦截路径在两者文件中配置的一样，后面会覆盖掉前者。
    所以前端控制器配置拦截路径是 / 的所有静态资源都会交由前端控制器处理，而拦截路径配置 /*，所有静态资源和 JSP 都会交由前端控制器处理。

<servlet-mapping>
	<servlet-name>dispatcherServletservlet-name>
	<url-pattern>*.dourl-pattern>
servlet-mapping>	

<mvc:default-servlet-handler/>

package cn.wolfcode.web.controller;
	@Controller
	public class RequestController {
		@RequestMapping("/req7")
			public String resp7(@ModelAttribute("u") User user) {
			return "m";
		}
}

package cn.linstudy.web.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class ResponseController {
  // 提供方法处理请求，localhost/resp1
  @RequestMapping("/resp1")
  public ModelAndView resp1() {
// 通过创建这个类对象，告诉 Spring MVC 找什么视图文件， 往作用域或者说往模型中存入什么数据
    ModelAndView mv = new ModelAndView();
// 往作用域或者模型中存入数据
    mv.addObject("msg", "方法返回类型是 ModelAndView");
// 找视图
    mv.setViewName("/WEB-INF/views/resp.jsp");
    return mv;
  }

package cn.instudy.web.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class ResponseController {
  // 提供方法处理请求，localhost/resp2
  @RequestMapping("/resp2")
  public String resp2(Model model) {
// 往作用域或者模型中存入数据
    model.addAttribute("msg", "方法返回类型是 String");
// 返回视图名
    return "/WEB-INF/views/resp.jsp";
  }
}

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
	
	<property name="prefix" value="/WEB-INF/views/"/>
	
	<property name="suffix" value=".jsp"/>
bean>

package cn.linstudy.web.controller;
@Controller
public class ResponseController {

	@RequestMapping("/TestForward")
	public String forward() {
		return "forward:/WEB-INF/views/welcome.jsp";
	}
}

package cn.linstudy.web.controller;
@Controller
public class ResponseController {
	// localhost/r
	@RequestMapping("/TestRedirect")
	public String redirect() {
		return "redirect:/static/demo.html";
	}
}

 // 请求路径为：/req1?username=zs&age=18
package cn.linstudy.web.controller;
	@Controller
	public class RequestController {
		@RequestMapping("/req1")
		public ModelAndView resp1(String username, int age) {
			System.out.println(username);
			System.out.println(age);
			return null;
		}
}

 // 请求路径为：/req1?username=zs&age=18
package cn.linstudy.web.controller;
	@Controller
	public class RequestController {
		@RequestMapping("/req1")
		public ModelAndView resp1(@RequestParam("username") String username1, @RequestParam("age") int age1) {
			System.out.println(username);
			System.out.println(age);
			return null;
		}
}

// 请求路径 /req3?ids=1&ids=2&ids=3
package cn.linstudy.web.controller;
	@Controller
	public class RequestController {
		@RequestMapping("/req3")
		public ModelAndView resp3(Long[] ids) {
			System.out.println(Arrays.toString(ids));
			return null;
		}
}

// /req4?username=hehe&password=666
package cn.linstudy.web.controller;	
	@Controller
	public class RequestController {
		@RequestMapping("/req4")
		public ModelAndView resp4(User user) {
			System.out.println(user);
			return null
		}
}

package cn.linstudy.controller;
	@Controller
	public class RequestController {
		@RequestMapping("/req5")
		// 注意形参的类型为 java.util.Date
		public ModelAndView resp5(@DateTimeFormat(pattern="yyyy-MM-dd")Date date) {
			System.out.println(date.toLocaleString());
			return null;
		}
}

package cn.linstudy.domain;
	public class User {
	private Long id;
	private String Username;
	private String password;
	// 增加下面这个字段，并贴注解
	@DateTimeFormat(pattern="yyyy-MM-dd")
	private Date date;
	// 省略 setter getter toString
}

	package cn.linstudy.controller;
	@Controller
	public class RequestController {
		@RequestMapping("/req6")
		public ModelAndView resp6(User user) {
			System.out.println(user);
			return null;
		}
}

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>文件上传</title>
</head>
<body>
	<form action="/upload" method="POST" enctype="multipart/form-data">
		文件:<input type="file" name="pic"><br>
		<input type="submit" value="提交"/>
	</form>
</body>
</html>

<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:mvc.xml</param-value>
	</init-param>
	<load-on-startup>1</load-on-startup>
	<multipart-config>
		<max-file-size>52428800</max-file-size>
		<max-request-size>52428800</max-request-size>
	</multipart-config>
</servlet>
<servlet-mapping>
	<servlet-name>dispatcherServlet</servlet-name>
	<url-pattern>/</url-pattern>
</servlet-mapping>

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
  
  <property name="maxUploadSize" value="2097152"/>
bean>

package cn.linstudy.controller;
	@Controller
	public class UploadController {
	// Spring 容器存在 ServletContext 类型的对象，所以定义好 ServletContext 类型字段贴@Autowired 注解即可获取到
	@Autowired
	private ServletContext servletContext;
	@RequestMapping("/upload")
	public ModelAndView upload(Part pic) throws Exception {
		System.out.println(pic.getContentType()); // 文件类型
		System.out.println(pic.getName()); // 文件参数名
		System.out.println(pic.getSize()); // 文件大小
		System.out.println(pic.getInputStream()); // 文件输入流
		// FileCopyUtils.copy(in, out)，一个 Spring 提供的拷贝方法
		// 获取项目 webapp 目录下 uploadDir 目录的绝对路径
		System.out.println(servletContext.getRealPath("/uploadDir"));
		return null;
	}
}

	/**
     * 测试文件下载
     * @param fileName 要下载文件名
     * @return
     */
    @RequestMapping("download")
    public String download(String fileName, HttpServletRequest request, HttpServletResponse response) throws IOException {
        //获取下载服务器上文件的绝对路径
        String realPath = request.getSession().getServletContext().getRealPath("/down");
        //根据文件名获取服务上指定文件
        FileInputStream is = new FileInputStream(new File(realPath, fileName));
        //获取响应对象设置响应头信息
        response.setHeader("content-disposition","attachment;fileName="+ URLEncoder.encode(fileName,"UTF-8"));
        ServletOutputStream os = response.getOutputStream();
        IOUtils.copy(is,os);
        IOUtils.closeQuietly(is);
        IOUtils.closeQuietly(os);
        return null;
    }