200字范文 > springmvc代码详细(五种映射绑定参数处理json数据文件上传转发拦截器的实现)

springmvc代码详细(五种映射绑定参数处理json数据文件上传转发拦截器的实现)

时间：2023-01-04 01:33:48

项目结构图：

父工程的pom.xml文件：

<properties><junit.version>4.10</junit.version><spring.version>4.1.3.RELEASE</spring.version><mybatis.version>3.2.8</mybatis.version><mybatis.spring.version>1.2.2</mybatis.spring.version><mybatis.paginator.version>1.2.15</mybatis.paginator.version><mysql.version>5.1.32</mysql.version><slf4j.version>1.6.4</slf4j.version><jackson.version>2.4.2</jackson.version><druid.version>1.0.9</druid.version><httpclient.version>4.3.5</httpclient.version><jstl.version>1.2</jstl.version><servlet-api.version>2.5</servlet-api.version><jsp-api.version>2.0</jsp-api.version><joda-time.version>2.5</joda-time.version><commons-lang3.version>3.3.2</commons-lang3.version><commons-io.version>1.3.2</commons-io.version></properties><dependencyManagement><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>${junit.version}</version><scope>test</scope></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aspects</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>${mybatis.version}</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>${mybatis.spring.version}</version></dependency><dependency><groupId>com.github.miemiedev</groupId><artifactId>mybatis-paginator</artifactId><version>${mybatis.paginator.version}</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>${mysql.version}</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>${slf4j.version}</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>${jackson.version}</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>${druid.version}</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>${httpclient.version}</version></dependency><dependency><groupId>jstl</groupId><artifactId>jstl</artifactId><version>${jstl.version}</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>${servlet-api.version}</version><scope>provided</scope></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jsp-api</artifactId><version>${jsp-api.version}</version><scope>provided</scope></dependency><dependency><groupId>joda-time</groupId><artifactId>joda-time</artifactId><version>${joda-time.version}</version></dependency><dependency><groupId>mons</groupId><artifactId>commons-lang3</artifactId><version>${commons-lang3.version}</version></dependency><dependency><groupId>mons</groupId><artifactId>commons-io</artifactId><version>${commons-io.version}</version></dependency></dependencies></dependencyManagement><build><finalName>${project.artifactId}</finalName><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-resources-plugin</artifactId><version>2.7</version><configuration><encoding>UTF-8</encoding></configuration></plugin><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>3.2</version><configuration><source>1.7</source><target>1.7</target><encoding>UTF-8</encoding></configuration></plugin></plugins><pluginManagement><plugins><plugin><groupId>org.apache.tomcat.maven</groupId><artifactId>tomcat7-maven-plugin</artifactId><version>2.2</version></plugin></plugins></pluginManagement></build>

子工程的pom.xml文件：

<dependencies><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId></dependency><dependency><groupId>jstl</groupId><artifactId>jstl</artifactId></dependency><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><scope>provided</scope></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jsp-api</artifactId><scope>provided</scope></dependency><dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.3.2</version></dependency></dependencies><build><plugins><plugin><groupId>org.apache.tomcat.maven</groupId><artifactId>tomcat7-maven-plugin</artifactId><version>2.2</version><configuration><port>8080</port><path>/</path></configuration></plugin></plugins></build>

springmvc-servlet.xml：

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="/schema/beans"xmlns:xsi="/2001/XMLSchema-instance" xmlns:p="/schema/p"xmlns:context="/schema/context"xmlns:mvc="/schema/mvc"xsi:schemaLocation="/schema/beans /schema/beans/spring-beans.xsd/schema/mvc /schema/mvc/spring-mvc-4.0.xsd/schema/context /schema/context/spring-context.xsd"><context:component-scan base-package="com.ljh.web"/><mvc:annotation-driven/><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/views/"></property><property name="suffix" value=".jsp"></property></bean><bean id="multipartResolver"class="org.springframework.monsMultipartResolver"><property name="defaultEncoding" value="UTF-8"></property><property name="maxUploadSize" value="5242880"></property></bean><mvc:interceptors><mvc:interceptor><mvc:mapping path="/**"/><bean class="com.ljh.web.MyHandler"></bean></mvc:interceptor></mvc:interceptors></bean

web.xml：

<!DOCTYPE web-app PUBLIC"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN""/dtd/web-app_2_3.dtd" ><web-app><filter><filter-name>encodingFilter</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>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><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:springmvc-servlet.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>springmvc</servlet-name><url-pattern>/rest/*</url-pattern></servlet-mapping></web-app>

User：

package com.ljh.pojo;public class User {private Integer id;private String name;private Integer age;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}@Overridepublic String toString() {return "User{" +"id=" + id +", name='" + name + '\'' +", age=" + age +'}';}}

Hello2：

package com.ljh.web;import com.ljh.pojo.ListUser;import com.ljh.pojo.User;import org.springframework.http.HttpStatus;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.*;import org.springframework.web.multipart.MultipartFile;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.File;import java.util.ArrayList;import java.util.List;@Controllerpublic class Hello2 {/*** 五种映射方式的演示从show1到show7* @return*///标椎url映射@RequestMapping("show1")public ModelAndView test1(){ModelAndView mv = new ModelAndView();mv.addObject("msg","第一个注解程序");mv.setViewName("hello");return mv;}//ant方式映射 *代表通配符有* 和** 两种方式一个*只能匹配一个位置的字符两个* 可以匹配0个,一个或者多个位置的字符//比如：/*/show2 URL可以写成 /aaa/show2.do ;/**/show2 url可以写成 /show2.do 或者 /aa/show2.do 以及/aa/bb/show2.do 都可以@RequestMapping("/**/show2")public ModelAndView test2(){ModelAndView mv = new ModelAndView("hello");mv.addObject("msg","这是通配符映射");return mv;}//占位符映射其中{userid}和{username}就是两个占位符在URL中这两个位置可以写任意字符//@PathVariable() 可以通过这个注解来获取占位符的值@RequestMapping("test/{userid}/{username}/show3")public ModelAndView test3(@PathVariable("userid") int id,@PathVariable("username")String name){ModelAndView mv = new ModelAndView("hello");mv.addObject("msg","这是占位符映射 userid:"+id+"username:"+name);return mv;}//限制请求方式映射可以写多种请求方式用{}就可以如果一个的话就不需要{}了 405:请求方式错误@RequestMapping(value = "show4",method = {RequestMethod.GET,RequestMethod.POST})public ModelAndView test4(){ModelAndView mv = new ModelAndView("hello");mv.addObject("msg","这是限制请求方式映射");return mv;}//限制请求参数@RequestMapping(value = "show5",params = "userId") //表示url必须要带上UuserId这个参数才可以访问比如/shoiw5.do?userId=任意值public ModelAndView test5(){ModelAndView mv = new ModelAndView("hello");mv.addObject("msg","这是限制请求方式映射");return mv;}@RequestMapping(value = "show6",params = "!userId") //表示url中UuserId不能作为参数的名称才可以访问比如/shoiw5.do?aaa=任意值public ModelAndView test6(){ModelAndView mv = new ModelAndView("hello");mv.addObject("msg","这是限制请求方式映射");return mv;}@RequestMapping(value = "show7",params = "userId!=1") //表示url中UuserId的值不能等于1才可以访问比如/shoiw5.do?userId=除了1以外都可以public ModelAndView test7(){ModelAndView mv = new ModelAndView("hello");mv.addObject("msg","这是限制请求方式映射");return mv;}//如何获取页面上的请求参数获取form表单的数据@RequestMapping("show8")public void test8(HttpServletRequest request, HttpServletResponse response){String username = request.getParameter("userName");String password = request.getParameter("passWord");System.out.println(username+" "+password);}//第二种获取请求参数的方式 @RequestParam() 相当于request.getParameter()//@RequestParam()里面还有两个属性 required和defaultValue//required默认为true 表示该属性必须要赋值如果是false的话该属性可以不赋值就提交表单如果是int类型的属性设置为false的话会出现400错误最好使用Ingeter类型因为int类型不写会用0表示 0也是数字//defaultValue是默认值的意思如果有defaultValue的话那么required就会失效@RequestMapping("show9")public ModelAndView test9(@RequestParam("username" ) String username,@RequestParam("age") int age ){ModelAndView mv = new ModelAndView("hello");mv.addObject("msg","username="+username+"age="+age);return mv;}//获取cookie的值@RequestMapping("show11") //通过这种方法进去到cookie.jsp页面通过视图解析器解析返回的字符串实现跳转页面public String test11(){return "cookie";}@RequestMapping("show10") //从cookie.jsp页面跳转到 show10中public String test10(@CookieValue(value = "name",required = false) String name,@CookieValue(value = "age") int age){System.out.println(name+" "+age);return "hello";}//pojo对象传递参数@RequestMapping("show12")public ModelAndView test12(User user){ModelAndView mv = new ModelAndView("hello");mv.addObject("msg",user);System.out.println(user);return mv;}//数据类型的绑定@RequestMapping("show13")@ResponseStatus(HttpStatus.OK)//响应状态码可以解决返回值为void的问题因为这个注解直接响应了成功的状态码public void test13(@RequestParam("name") String name,@RequestParam("age")Integer age,@RequestParam("income")Double income,@RequestParam("isMarried")Boolean isMarried,@RequestParam("interests")String[] interests){System.out.println("name="+name);System.out.println("age="+age);System.out.println("income="+income);System.out.println("isMarried="+isMarried);System.out.println("interests="+interests);}//list绑定这里面的方法不能直接用集合做参数所以创建了一个ListUser类做参数@RequestMapping("show14")@ResponseStatus(HttpStatus.OK)public void test14(ListUser listUser){if(listUser.getUser()!=null){for(User u : listUser.getUser()){System.out.println(u);}}}//jsp 和jstl视图解析器@RequestMapping("show15")public ModelAndView test15(){ModelAndView mv = new ModelAndView("users");User user1 = new User();user1.setId(1);user1.setName("张三");user1.setAge(20);User user2 = new User();user2.setId(2);user2.setName("李四");user2.setAge(20);User user3 = new User();user3.setId(3);user3.setName("王五");user3.setAge(20);User user4 = new User();user4.setId(4);user4.setName("小明");user4.setAge(20);List<User> list = new ArrayList<User>();list.add(user1);list.add(user2);list.add(user3);list.add(user4);mv.addObject("list",list);return mv;}//以json格式输出数据单个对象@RequestMapping("show16")@ResponseBody //用@ResponseBody会把返回的对象进行json输出注意是返回的对象public User test16(){User user1 = new User();user1.setId(1);user1.setName("张三");user1.setAge(20);return user1;}//集合处理@RequestMapping("show17")@ResponseBodypublic List<User> test17(){User user1 = new User();user1.setId(1);user1.setName("张三");user1.setAge(20);User user2 = new User();user2.setId(2);user2.setName("李四");user2.setAge(20);User user3 = new User();user3.setId(3);user3.setName("王五");user3.setAge(20);User user4 = new User();user4.setId(4);user4.setName("小明");user4.setAge(20);List<User> list = new ArrayList<User>();list.add(user1);list.add(user2);list.add(user3);list.add(user4);return list;}//处理json数据并显示出来@RequestMapping("show18")@ResponseBodypublic List<User> test18(){User user1 = new User();user1.setId(1);user1.setName("张三");user1.setAge(20);User user2 = new User();user2.setId(2);user2.setName("李四");user2.setAge(20);User user3 = new User();user3.setId(3);user3.setName("王五");user3.setAge(20);List<User> list = new ArrayList<User>();list.add(user1);list.add(user2);list.add(user3);return list;}//跳转json页面方法@RequestMapping("show19")public String test19(){return "json";}//接收json串转换为pojo对象@RequestMapping("show20")@ResponseStatus(HttpStatus.OK)public void test20(@RequestBody User user){System.out.println(user);}//集合@RequestMapping("show21")@ResponseStatus(HttpStatus.OK)public void test21(@RequestBody List<User> list){for(User u : list){System.out.println(u);}}//通用页面的跳转也要在核心控制器中修改url路径为/* 原本是*.do@RequestMapping("{path}")public String test22(@PathVariable("path") String path){return path;}//文件上传@RequestMapping("upload.do")public String upload(@RequestParam("file") MultipartFile multipartFile) throws Exception{if(multipartFile != null){multipartFile.transferTo(new File("e://temp//"+multipartFile.getOriginalFilename()));}return "success";}//转发 forward 不仅可以转发跳转页面还可以跳转到方法上@RequestMapping("show22")public String test22(){/*return "forward:user.html"; */return "forward:/rest/show1";}@RequestMapping("login")public String login(){return "forward:/login.jsp";}}

MyHandler拦截器：

package com.ljh.web;import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class MyHandler implements HandlerInterceptor {//前置方法@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {System.out.println("执行前置方法");return true;//true 表示继续执行后面的逻辑 false 表示不继续执行}//后置方法@Overridepublic void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {System.out.println("执行后置方法");}//完成方法@Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {System.out.println("执行完成方法");}}

cookie.jsp：

<%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head><title>Title</title><script>document.cookie="name=zhangsan";document.cookie="age=20";</script></head><body><a href="show10.do">提交</a></body></html>

hello.jsp：

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %><%--isELIgnored="false"这句话是添加上去的因为在页面中原本是不能使用el表达式的这句话的意思就是忽略el表达式现在可以使用el表达式来获取数据了--%><html><head><title>Title</title></head><body>${msg}</body></html>

json.jsp：

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %><html><head><title>Title</title><%--因为本地没有jquery包所以引入网上的包--%><script type="text/javascript" src="/jquery/2.0.0/jquery.min.js"></script></head><body><script type="text/javascript">$.ajax({type:"get",url:"/show18.do",success: function (data) {var t = "";$(data).each(function (i) {t += "<tr><td>" + data[i].id + "<tr><td>" + data[i].name + "<tr><td>" + data[i].age+"<tr><td>"});$("table").append(t);}});</script><table border="1"><tr><td>id</td><td>name</td><td>age</td></tr></table></body></html>

success.jsp：

<%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head><title>Title</title></head><body>上传成功</body></html>

upload.jsp：

<%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head><title>Title</title></head><body><h2>上传页面</h2><form action="/rest/upload.do" method="post" enctype="multipart/form-data" ><input type="file" name="file" ><br><input type="submit" value="上传"></form></body></html>

users.jsp：

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %><%@ taglib prefix="c" uri="/jsp/jstl/core" %><html><head><title>Title</title></head><body><table border="1"><thead><tr><th>ID</th><th>Name</th><th>Age</th></tr></thead><tbody><c:forEach items="${list}" var="user"><tr><td>${user.id}</<td><td>${user.name}</<td><td>${user.age}</<td></tr></c:forEach></tbody></table></body></html>

list.jsp：

<%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head><title>Title</title></head><body><form action="/show14.do">用户1：<input type="text" name="user[0].name"/><br/><%--这个user必须要和ListUser类中的变量名一样那么要和User中的变量名一样--%>用户2：<input type="text" name="user[1].name"/><br/>用户3：<input type="text" name="user[2].name"/><br/><input type="submit" value="测试"/></form></body></html>

user.html

<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>Title</title></head><body><form action="/show8.do" method="post">姓名：<input type="text" name="userName"><br/>密码：<input type="password" name="passWord"><br/><input type="submit"></form><form action="/show13.do" method="post"><div>姓名:</div><div><input name="name" value="张三"/></div><div class="clear"></div><div>年龄:</div><div><input name="age" value="20"/></div><div class="clear"></div><div>收入:</div><div><input name="income" value="100000"/></div><div class="clear"></div><div>结婚:</div><div><input type="radio" name="isMarried" value="true" checked="checked"/>是<input type="radio" name="isMarried" value="false"/>否</div><div class="clear"></div><div>兴趣:</div><div><input type="checkbox" name="interests" value="听歌" checked="checked"/>听歌<input type="checkbox" name="interests" value="书法" checked="checked"/>书法<input type="checkbox" name="interests" value="看电影" checked="checked"/>看电影</div><div class="clear"></div><div><input type="submit" value="提交表单"/></div></form></body></html>

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