springmvc笔记(基本配置,核心文件,路径,参数,文件上传,json整合)

首先导入jar包

大家注意一下我的springmvc,jackson,common-up的jar包版本.其他版本有可能出现不兼容.

src文件:

webroot目录:

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_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>springmvc7</display-name>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
      <servlet-name>mvc-dispatcher</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <!-- DispatcherServlet对应的上下文配置,默认/WEB-INF/$servlet-name$-servlet.xml
          下面配置spring-mvc的核心配置文件
       -->
       <init-param>
           <param-name>contextConfigLocation</param-name>
           <param-value>/WEB-INF/configs/spring/mvc-dispatcher-servlet.xml</param-value>
       </init-param>
      <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
      <servlet-name>mvc-dispatcher</servlet-name>
      <!-- mvc-dispatcher 拦截所有的请求 -->
      <url-pattern>/</url-pattern>
  </servlet-mapping>
  
  
</web-app>

mvc-dispatcher-servlet.xml

<?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" 
    xmlns:context="http://www.springframework.org/schema/context" 
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop"
    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-3.2.xsd        
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">

<!-- 激活
     @Required
     @Autowired,jsr250's
     @PostConstruct,
     @PreDestroy and @ Resource等标注
 -->
<context:annotation-config />
<!-- 
    DispatcherServlet上下文,只搜索@Controller标注的类,不搜索其他标注的类
 -->
<context:component-scan base-package="com.gys.mvcdemo">
    <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>

<!-- 
    
    HandlerMapping无需配置,Spring MVC可以默认启动
 -->
 <!-- 
     扩充了注解驱动,可以将请求参数绑定到控制器参数
    启用基于annotation的handlerMapping.
  -->
<mvc:annotation-driven />

<!-- 
    静态资源处理,css,js,imgs
 -->
<mvc:resources location="/resources/" mapping="/resources/**"/>


<!-- 视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
    <property name="prefix" value="/WEB-INF/jsps/" />
    <property name="suffix" value=".jsp" />
</bean>

<!-- 配置上传文件代码,导入commons-fileupload-1.2.2.jar,commons-io-2.4.jar
    200*1024*1024即200M resolveLazily属性启用是为了推迟文件解析,以便捕获文件大小异常
 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <!-- 上传的最大限制 -->
    <property name="maxUploadSize" value="209715200" />
    <!-- 默认编码 -->
    <property name="defaultEncoding" value="UTF-8" />
    <!-- 上传文件的解析 -->
    <property name="resolveLazily" value="true" />
</bean>

<!-- 整合json,导入jackson-core-asl-1.1.2.jar,jackson-mapper-asl-1.1.2.jar
    配置ViewResolver.
    可以用多个ViewResolver.使用order属性排序.InternalResourceViewResolver放在最后
 -->
<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
    <property name="order" value="1" />
    <property name="mediaTypes">
        <map>
            <entry key="json" value="application/json" />
            <entry key="xml" value="application/xml" />
            <entry key="htm" value="text/html" />
        </map>
    </property>
    <property name="defaultViews">
        <list>
        <!-- JSON View -->
            <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView"></bean>
        </list>
    </property>
    <property name="ignoreAcceptHeader" value="true" />
</bean>
</beans>

上传文件的页面:

file.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>上传页面</title>

  </head>
  
  <body>
    <h1>上传附件</h1>
    <form method="post" action="<%=path %>/courses/doUpload" enctype="multipart/form-data">
        <input type="file" name="file" /><br/>
        <input type="submit" value="上传" />
    </form>
    
  </body>
</html>

Course.java

package com.gys.mvcdemo.model;

public class Course {
    //课程IDd
    private Integer courseId;
    //课程名称
    private String title;
//图片路径    
    private String imgPath;
    //学习人数
    private Integer learningNum;
    //课程时长
    private Long duration;
    //课程难度
    private Integer level;
    //课程描述
    private String levelDesc;
    //课程介绍
    private String descr;
    public Integer getCourseId() {
        return courseId;
    }
    public void setCourseId(Integer courseId) {
        this.courseId = courseId;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public String getImgPath() {
        return imgPath;
    }
    public void setImgPath(String imgPath) {
        this.imgPath = imgPath;
    }
    public Integer getLearningNum() {
        return learningNum;
    }
    public void setLearningNum(Integer learningNum) {
        this.learningNum = learningNum;
    }
    public Long getDuration() {
        return duration;
    }
    public void setDuration(Long duration) {
        this.duration = duration;
    }
    public Integer getLevel() {
        return level;
    }
    public void setLevel(Integer level) {
        this.level = level;
    }
    public String getLevelDesc() {
        return levelDesc;
    }
    public void setLevelDesc(String levelDesc) {
        this.levelDesc = levelDesc;
    }
    public String getDescr() {
        return descr;
    }
    public void setDescr(String descr) {
        this.descr = descr;
    }
    
    
    
    
}

CourseServiceImpl.java

package com.gys.mvcdemo.service.impl;

import org.springframework.stereotype.Service;

import com.gys.mvcdemo.model.Course;
import com.gys.mvcdemo.service.CourseService;

@Service("courseService")
public class CourseServiceImpl implements CourseService{

    @Override
    public Course getCoursebyId(Integer courseId) {
        Course course=new Course();
        course.setCourseId(courseId);
        course.setTitle("深入浅出Java多线程");
        course.setImgPath("1.jpg");
        course.setLearningNum(123465);
        course.setLevel(2);
        course.setLevelDesc("中级");
        course.setDuration(7200L);
        course.setDescr("多线程是日常开发中的常用知识...........");
        return course;
    }
}

CourseService.java

package com.gys.mvcdemo.service;

import com.gys.mvcdemo.model.Course;

public interface CourseService {
    Course getCoursebyId(Integer courseId);
}

CourseController.java

package com.gys.mvcdemo.controller;

import java.io.File;
import java.io.IOException;
import java.util.Map;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.FileUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import com.gys.mvcdemo.model.Course;
import com.gys.mvcdemo.service.CourseService;

@Controller
@RequestMapping("/courses")
public class CourseController {
    
    private CourseService courseService;

    @Autowired
    public void setCourseService(CourseService courseService) {
        this.courseService = courseService;
    }
    
    /**
     * 路径一
     *  /courses/vies?courseId=123
     * @param model
     * @param courseId
     * @return
     */
    @RequestMapping(value="/view",method=RequestMethod.GET)
    public String viewCourse(Model model,@RequestParam("courseId") Integer courseId){
        Course course=courseService.getCoursebyId(courseId);
        model.addAttribute(course);
        return "course_overview";
    }
    /**
     * 路径二
     *  courses/view2/{courseId}
     * @param courseId
     * @param model
     * @return
     */
    @RequestMapping(value="/view2/{courseId}",method=RequestMethod.GET)
    public String viewCourse2(@PathVariable("courseId") Integer courseId,Map<String, Object> model){
        Course course=courseService.getCoursebyId(courseId);
        model.put("course",course);
        return "course_overview";
    }
    
    /**
     * 路径三
     *  courses/view3?courseId=3
     * @param request
     * @param response
     * @return
     */
    @RequestMapping("view3")
    public String viewCourse3(HttpServletRequest request,HttpServletResponse response){
        Integer courseId=Integer.valueOf(request.getParameter("courseId"));
        Course course=courseService.getCoursebyId(courseId);
        request.setAttribute("course", course);
        return "course_overview";
    }
    /**
     * 路径四
     * courses/admin?add
     * @return
     */
    @RequestMapping(value="/admin",method=RequestMethod.GET,params="add")
    public String createCourse(){
        
        return "course_admin/edit";
    }
    /**
     * 服务器内部跳转
     * @param course
     * @return
     */
    @RequestMapping(value="/save",method=RequestMethod.POST)
    public String doSave(Course course){
        course.setCourseId(123);
        //跳转
        return "redirect:view2/"+course.getCourseId();
    }
    /**
     * 上传页面
     * @return
     */
    @RequestMapping(value="/upload",method=RequestMethod.GET)
    public String showUploadPage(){
        return "course_admin/file";
    }
    /**
     * 上传文件
     * @param file
     * @return
     * @throws IOException
     */
    @RequestMapping(value="/doUpload",method=RequestMethod.POST)
    public String doUploadFile(@RequestParam("file") MultipartFile file) throws IOException{
        if(!file.isEmpty()){
            System.out.println("提示:"+file.getOriginalFilename());
            FileUtils.copyInputStreamToFile(file.getInputStream(), new File("d:\upload\",System.currentTimeMillis()+file.getOriginalFilename()));
        }
        return "success";
    }
    /**
     * 向前台返回json1
     * @param courseId
     * @return
     */
    @RequestMapping(value="/{courseId}",method=RequestMethod.GET)
    public @ResponseBody Course getCoruseInJson(@PathVariable("courseId") Integer courseId){
        return courseService.getCoursebyId(courseId);
    }
    /**
     * 向前台返回json2
     * @param courseId
     * @return
     */
    @RequestMapping(value="/jsontype/{courseId}",method=RequestMethod.GET)
    public ResponseEntity<Course> getCoruseInJson2(@PathVariable("courseId") Integer courseId){
        Course course=courseService.getCoursebyId(courseId);
        return new ResponseEntity<Course>(course,HttpStatus.OK);
    }
    
}

完了!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!