SpringMVC学习笔记

科技2025-09-16 36

一、入门

1、创建web项目 1）打开idea ->new ->project->java enterprise->(勾选上)web application->next ->输入项目名 2)导入jar包再WEB-INF下创建一个lib文件夹->将jar包导入lib文件夹中->选择右键->add as library 3)添加配置文件再src目录下创建一个springmvc.xml文件在springmvc.xml中添加如下内容： <?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" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" 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/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">  <context:component-scan base-package="com.itlike"/> </beans> 4)配置前端控制器再web.xml中配置如下内容： <?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">  <servlet> <servlet-name>mySpringMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>mySpringMVC</servlet-name> <url-pattern>*.action</url-pattern> </servlet-mapping> </web-app> 5）创建控制器（1)在src目录下创建一个包com.itlike.springmvc (2)在包中创建一个l类MyController @Controller public class MyController { @RequestMapping("/first.action") public ModelAndView show(){ //创建ModeANndView 用来从存放数据视图 ModelAndView modelAndView=new ModelAndView(); //请求过来后跳转到另一个界面往另一个 modelAndView.addObject("name","myxq"); //设置视图jsp modelAndView.setViewName(/result.jsp"); return modelAndView; } } 6）创建jsp (1)ideal实现热部署 https://blog.csdn.net/weixin_42831477/article/details/82229436 (2)点击项目名称SpringMVCProject1 点击RJebel 进行热部署 (3)在web目录下建立两个jsp文件 index.jsp: <html> <head> <title>$Title$</title> </head> <body> <a href="${pageContext.request.contextPath}/first.action">发送多个,</a> </body> </html> result.jsp <html> <head> <title>Title</title> </head> <body> <h1>result ${name} </h1> </body> </html> 7)执行点击rebel debug Tomcat 7.0 如果在web-inf下的myxq文件下建立一个itlike.jsp文件使index.jsp能跳转到itlike.jsp有两种方式： (1)modelAndView.setViewName("/WEB-INF/myxq/itlike.jsp"); (2)在springmvc.xml中配置 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/myxq"></property> <property name="suffix" value=".jsp"></property> </bean> 在控制器中 modelAndView.setViewName("itlike") 8)执行转发的两种方式 @Controller public class MyController { //设置数据 @RequestMapping("/first.action") public ModelAndView show() { //创建ModeANndView 用来从存放数据视图 ModelAndView modelAndView = new ModelAndView(); //请求过来后跳转到另一个界面往另一个 modelAndView.addObject("name", "myxq"); //设置视图jsp modelAndView.setViewName("/result.jsp"); return modelAndView; } //不需要设置数据 @RequestMapping("/second.action") public String show2() { return "/result.jsp"; } } 9）重定向 @Controller public class MyController { //设置数据 @RequestMapping("/first.action") public ModelAndView show() { //创建ModeANndView 用来从存放数据视图 ModelAndView modelAndView = new ModelAndView(); //请求过来后跳转到另一个界面往另一个 modelAndView.addObject("name", "myxq"); //设置视图jsp modelAndView.setViewName("redirect:/result.jsp"); return modelAndView; } //不需要设置数据 @RequestMapping("/second.action") public String show2() { return "redirect:/result.jsp"; } }

二、SpringMVC Request接收参数

1、创建web项目如上 2、在项目下创建单独的source文件夹存放.xml文件右击source文件夹 mark resource as-> resourse root 3、web.xml 中使用/ <servlet-mapping> <servlet-name>mySpringMVC</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> 4、在index.jsp中输入参数 <a href="${pageContext.request.contextPath}/first?id=1&name=itlike">first.jsp</a> <a href="${pageContext.request.contextPath}/second?id=1&name=itlike">second.jsp</a> 在控制器中接收 @Controller public class MyController { @RequestMapping("/first") public String myform(HttpServletRequest request){ String id=request.getParameter("id"); String name=request.getParameter("name"); System.out.println(id); System.out.println(name); return "/second.jsp"; } //id 参数名称必须和前面传进来的参数名相同 @RequestMapping("/second") public String myform2(Integer id,String name) { System.out.println(id); System.out.println(name); return "/result.jsp"; } //id 参数名称也可以和传入的参数不同但必须用RequestParam //required 传参要求默认true @RequestMapping("/second") public String myform3(@RequestParam(value="id",required = false,defaultValue = "100") Integer idkey, String name) { System.out.println(idkey); System.out.println(name); return "/result.jsp"; } }

三、javebean接收参数

1、在com.itlike.domain包下创建一个javebean User 里面有两属性和getter setter toString private String user_name; private String user_age; 2、MyControler //bean User类中的属性名称必须和index中传入的属性名称相同 @RequestMapping("/fouth") public String myform4(User user) { System.out.println(user); return "/result.jsp"; }

四、数组接收参数

1、纯数组 1)MyController @RequestMapping("/five") public String myform4(String name[]) { System.out.println(Arrays.toString(name)); return "/result.jsp"; } 2)index.jsp <form action="${pageContext.request.contextPath}/five"> user:<input type="text" name="user_name"><br> age:<<input type="text" name="user_age"><<br> <input type="submit" value="提交"> </form> 2、封装 1）MyController @RequestMapping("/six") public String myform5(User user) { System.out.println(user); return "/result.jsp"; } 2)javabean User private String user_name; private String user_age; private String hobby[]; 3)jsp <form action="${pageContext.request.contextPath}/six"> user:<input type="text" name="user_name"><br> age:<<input type="text" name="user_age"><<br> 爱好：<input type="checkbox" name="hobby" value="篮球">篮球 <input type="checkbox" name="hobby" value="乒乓">乒乓 <input type="checkbox" name="hobby" value="足球">足球 <input type="submit" value="提交"> </form> 3、包装类接收 1）MyController @RequestMapping("/seven") public String myform7(User user) { System.out.println(user); return "/result.jsp"; } 2)index.jsp <form action="${pageContext.request.contextPath}/seven"> user:<input type="text" name="user_name"><br> age:<<input type="text" name="user_age"><<br> 爱好：<input type="checkbox" name="hobby" value="篮球">篮球 <input type="checkbox" name="hobby" value="乒乓">乒乓 <input type="checkbox" name="hobby" value="足球">足球<br> ------宠物------<br> 宠物名称:<input type="text" name="dog.name"><br> 宠物颜色：<<input type="text" name="dog.color"><br> <input type="submit" value="提交"> </form> 3)javabean Dog: private String name; private String color; User: private String user_name; private String user_age; private String hobby[]; private Dog dog; 4、list接收 1）MyController: @RequestMapping("/eight") public String myform8(User user) { System.out.println(user); return "/result.jsp"; } 2)index.jsp <form action="${pageContext.request.contextPath}/eight"> user:<input type="text" name="user_name"><br> age:<<input type="text" name="user_age"><<br> 爱好：<input type="checkbox" name="hobby" value="篮球">篮球 <input type="checkbox" name="hobby" value="乒乓">乒乓 <input type="checkbox" name="hobby" value="足球">足球<br> ------宠物------<br> 宠物名称:<input type="text" name="dog.name"><br> 宠物颜色：<<input type="text" name="dog.color"><br> 宠物名称:<input type="text" name="dog[0].name"><br> 宠物颜色：<<input type="text" name="dog[0].color"><br> 宠物名称:<input type="text" name="dog[1].name"><br> 宠物颜色：<<input type="text" name="dog[1].color"><br> <input type="submit" value="提交"> </form> 3)javabean User: private String user_name; private String user_age; private String hobby[]; private Dog dog; private List<Dog> dogs; Dog: private String name; private String color; 5、日期转换 1）Mycontroller2: @RequestMapping("/convert") public ModelAndView testconvert(String age, Date date) { //创建ModeANndView 用来从存放数据视图 System.out.println(age); System.out.println(date); ModelAndView modelAndView = new ModelAndView(); modelAndView.setViewName("/result.jsp"); return modelAndView; } 2)convert.jsp <form action="${pageContext.request.contextPath}/convert"> 年龄：<input type="text" name="age"> 生日：<input type="text" name="date"> <input type="submit" value="提交"> </form> 3)存在的问题：上面做和这种形式日期输入格式智能是2020/10/01 6、转换器的使用 1）定义转换器 public class DateConverter implements Converter<String, Date> { @Override public Date convert(String s){ if(s!=null){ SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yyyy-MM-dd"); try{ return simpleDateFormat.parse(s); }catch (ParseException e){ e.printStackTrace(); } } return null; } 2)在springmvc.xml中进行配置 <bean id="dateConverter" class="org.springframework.format.support.FormattingConversionServiceFactoryBean"> <property name="converters"> <list> <bean class="com.itlike.web.converter.DateConverter"></bean> </list> </property> </bean>  <mvc:annotation-driven conversion-service="dateConverter"/> 7、post请求乱码问题解决方案在web.xml中配置过滤器  <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>

五、RequestMapping相关属性

1、value :多个路径访问同一个方法 1)MyController3: @RequestMapping(value={"testrequestmapping1","testrequestmapping2"}) public String testquest(){ return "/second.jsp"; } 2)index.jsp <a href="${pageContext.request.contextPath}/testrequestmapping1">请求方式一</a> <a href="${pageContext.request.contextPath}/testrequestmapping2">请求方式二</a> 2、method 1)MyController3: //指定请求方式为get 默认都允许 @RequestMapping(value="testmethod",method = {RequestMethod.GET,RequestMethod.POST}) public String testmethod(){ System.out.println("testmethod..."); return "/second.jsp"; } 2)jsp: <form action="${pageContext.request.contextPath}/testmethod" method="get"> <input type="submit" value="提交"> </form> 3、param 1)MyController //param的使用要求name属性必须为itlike age不为1 否则报错 @RequestMapping(value="testparams",params = {"name=itlike","age！=1"}) public String testparams(){ System.out.println("testparams..."); return "/second.jsp"; } 2)jsp <a href="${pageContext.request.contextPath}/testparam?name=itlike">请求方式三</a> 4、headers: 1)MyController //headers的使用要求主机必须为8080 必须从http://localhost:8080/requestmapping.jsp来的信息才能访问 @RequestMapping(value="testheaders",params = {"name=itlike","age！=1"},headers = {"Host=localhost:8080","Referer=http://localhost:8080/requestmapping.jsp"}) public String testheaders(){ System.out.println("testheaders..."); return "/second.jsp"; } 2)jsp: <a href="${pageContext.request.contextPath}/testheaders?name=itlike">请求方式四</a> 5、地址通配符 ?:匹配单个字符 *:匹配多个字符：@RequestMapping("testant/*/ac")代表中间只能是一级 **:匹配多重路径：@RequestMapping("testant/**/ac")代表中间可以是任意级目录 1）jsp: //testant/ac 取决于@RequestMapping("testant/??") <a href="${pageContext.request.contextPath}/testant/ac">请求方式五</a> 2）MyController @RequestMapping("testant/??") public String testant(){ System.out.println("testant..."); return "/second.jsp"; }

@PathVariable

1、rest风格：资源定位及资源操作的风格不是协议,可以遵循,也可以不遵循 2、REST风格请求 REST 即 Representational State Transfer （资源）表现层状态转化用URL定位资源,用HTTP描述操作是目前最流行的一种互联网软件架构它结构清晰、符合标准、易于理解、扩展方便，所以正得到越来越多网站的采用使用POST, DELETE, PUT, GET 分别对应 CRUD Spring3.0 开始支持 REST 风格的请求 3、传统的操作资源 http://localhost:8080/get.action?id=10 查询 get http://localhost:8080/add.action 新增 post http://localhost:8080/update.action 修改 post http://localhost:8080/delete.action?id=10 删除 post 4、restful操作资源 http://localhost:8080/goods/1 查询GET http://localhost:8080/goods 新增POST http://localhost:8080/goods 更新PUT http://localhost:8080/goods/1 删除DELETE 5、rest 1）MyController3 //可以获取浏览器URL rest/1 @RequestMapping("rest/{id}") public String testrest(@PathVariable Integer id){ System.out.println(id); return "/second.jsp"; } 2)jsp <a href="${pageContext.request.contextPath}/rest/1">请求方式rest</a> 6、发送put与delete请求默认情况下form表单是bbu不支持put delete请求 spring3.0添加了一个HiddenHttpMethodFilter 可以将post转换为put delete请求 1）在web.xml中配置过滤器  <filter> <filter-name>hiddenmethod</filter-name> <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class> </filter> <filter-mapping> <filter-name>hiddenmethod</filter-name> <url-pattern>/*</url-pattern> */ </filter-mapping> 2）jsp <form action="${pageContext.request.contextPath}/testRestForm" method="post"> <input type="hidden" name="_method" value="put"> <input type="submit" > </form> 3）MyController @RequestMapping(value = "testRestForm/{id}",method = RequestMethod.PUT) public String testRestForm(@PathVariable Integer id){ System.out.println(id); return "redirect:/localsecond"; } @RequestMapping("localsecond") public String localsecond(){ return "/second.jsp"; } 7、@RequestHeader:

七、@RequestHeader

1、作用：获取请求头信息 2、MyController @RequestMapping("testHeader") public String testHeader(@RequestHeader("Host") String host, @RequestHeader("Referer") String referer, @RequestHeader("Cookie") String cookie){ System.out.println("testHeader"); System.out.println(host); System.out.println(referer); System.out.println(cookie); return "/second.jsp"; }

八、@CookieValue

1、在@RequestHeader中获取的cookie是一系列cookie的集合 2、通过JSESSIONID获取单个cookie @RequestMapping("testHeader") public String testHeader(@RequestHeader("Host") String host, @RequestHeader("Referer") String referer, @RequestHeader("Cookie") String cookie, @CookieValue("JSESSIONID") String sessionid){ System.out.println("testHeader"); System.out.println(host); System.out.println(referer); System.out.println(cookie); System.out.println(sessionid); return "/second.jsp"; }

九、页面传值

1、ModelAndView 传递和接收数据 1）MyController @RequestMapping("testModelAndView") public ModelAndView testModelAndView(){ ModelAndView modelAndView=new ModelAndView(); //把数据写到request域中 modelAndView.addObject("name","itlike"); modelAndView.setViewName("result.jsp"); return modelAndView; } 2)index.jsp: <a href="${pageContext.request.contextPath}/testModelAndView">测试testModelAndView</a> 3)result.jsp <h1>result...${requestScope.name}</h1> 2、model接收参数 1)addAttribute(String attributeName,Object attributeValue) 1）MyController @RequestMapping("testModel") public String testModel(Model model){ //把数据写到request域 model.addAttribute("name","itlike001"); return "result.jsp"; } 2)index.jsp <a href="${pageContext.request.contextPath}/testModel">测试testModel</a> 3)result.jsp <h1>result...${requestScope.name}</h1> 2)Map<String,Object>asMap(); 将当前的model转换成Map 3)Model addAttribute(Object attributeValue); 1)MyController //Model addAttribute(Object attributeValue)的使用 @RequestMapping("testModelAddAttribute") public String testModelAddAttribute(Model model){ //把数据写到request域 model.addAttribute("name","itlike001"); Goods mygoods=new Goods(); mygoods.setName("goods1"); mygoods.setPrice("10"); model.addAttribute(mygoods); //{name=itlike001,goods=Goods{name='goods1',price='10'}} //key值为mygoods所在类名 System.out.println(model.asMap()); return "result.jsp"; } 2)index.jsp <a href="${pageContext.request.contextPath}/testModelAddAttribute">测试testModelAddAttribute</a> 3)result.jsp //Model addAttribute(Object attributeValue)数据的获取 <h1>result...${goods.name}---${goods.price}</h1> 4)Model addAllAttributes(Map<String,?>attributes) 1)MyController //Model addAllAttributes(Map<String,?>attributes) //将Map中的内容复制到当前的model中如果当前model存在相同key 内容会被覆盖 @RequestMapping("testModelAddAllAttributes1") public String testModelAddAllAttributes1(Model model){ HashMap<String,Object> hashMap=new HashMap<>(); hashMap.put("name","itlike002"); hashMap.put("hot",1000); model.addAllAttributes(hashMap); System.out.println(model.asMap()); return "result.jsp"; } 2)index.jsp <a href="${pageContext.request.contextPath}/testModelAddAllAttributes1">测试testModelAddAllAttributes1</a> 5)Model addAllAttributes(Collection<?>attributeValues) 1)MyController //Model addAllAttributes(Collection) //将集合中类型作为key 将所提供的Collection z中的所有属性复制到这个Map中如果有相同类型会存在覆盖现象 //运行结果 {string =myxq ,integer=100} @RequestMapping("testModelAddAllAttributes2") public String testModelAddAllAttributes2(Model model){ ArrayList<Object> arrayList=new ArrayList<>(); arrayList.add("myxq"); arrayList.add(100); model.addAllAttributes(arrayList); System.out.println(model.asMap()); return "result.jsp"; } 2)index.jsp <a href="${pageContext.request.contextPath}/testModelAddAllAttributes2">测试testModelAddAllAttributes2</a> 6)Model mergeAttributes(Map<String,?>attributes) 和Model addAttributes(Map<String,?>attributes)一样只是它不会覆盖之前的内容 7)boolean containsAttribute(String attributeName)；判断model里有没有包含对应key值有则返回true没有返回 false @RequestMapping("testModelContainsAttribute") public String testModelContainsAttribute(Model model){ model.addAttribute("name","itlike"); Map map=new HashMap<>(); map.put("name","itlike110"); model.mergeAttributes(map); System.out.println(model.containsAttribute("name")); return "result.jsp"; } 3、Map接收参数 1)index.jsp <a href="${pageContext.request.contextPath}/testMap">测试testMap</a> 2)MyController //Map接收参数 @RequestMapping("testMap") public String testMap(Map map){ map.put("key1","value1"); map.put("key2","value2"); return "/result.jsp"; } 3)result.jsp <h1>result...${requestScope.key1}</h1> 4、SessionAttributes注解 1）再类上加注解 @Controller //把model中key为name存d到session中 @SessionAttributes("name") //把model中为String类型都写到session //@SessionAttributes(types=String.class) public class MyController {} 2)MyController @RequestMapping("testSession") public String testSession(Model model){ //把数据存在request中‘ model.addAttribute("name","itkkk") ; model.addAttribute("name2","bd"); return "/result2.jsp"; } 3)index.jsp <a href="${pageContext.request.contextPath}/testSession">测试testSession</a> 5、@SessionAttribute注解 1）MyController //从Session中取数据所以先得Session中有数据才行否则报错 @RequestMapping("testSession2") public String testSession2(@SessionAttribute("name") String name){ System.out.println(name); return "/result2.jsp"; } 2)index.jsp <a href="${pageContext.request.contextPath}/testSession2">测试testSession2</a><br>

十、form标签与验证

1、mvc-view-controller配置：当我们发送一个请求时，如果没有找到对应的mapping 则会到配置文件当中匹配mvc:view-controller 可以从index.jsp跳转到result.jsp 无需借助Controller 1)index.jsp <a href="${pageContext.request.contextPath}/testView">测试View</a> 2)result.jsp <h1>结果页---</h1> 3)springmvc.xml  <mvc:view-controller path="testView" view-name="result.jsp"/> 2、mvc:annotation-driven: 1)Controller @Controller public class MyController { @RequestMapping("testController") public String testController(){ return "/result.jsp"; } } 2)index.jsp <a href="${pageContext.request.contextPath}/testView">测试View</a> <a href="${pageContext.request.contextPath}/testController">测试Controller</a> 3)result.jsp <h1>result--</h1> 4)springmvc.xml  <mvc:view-controller path="testView" view-name="result.jsp"/> <mvc:annotation-driven/> 如果springmvc不加<mvc:annotation-driven>则 <a href="${pageContext.request.contextPath}/testController">测试Controller</a>将会时效因为mvc:view-controller的使用回答导致Controller失效 3、form标签 1)index.jsp <a href="${pageContext.request.contextPath}/update/1">测试update更新</a> 2)MyController @RequestMapping("update/{id}") public String testUpdate(@PathVariable Integer id, Model model){ System.out.println(id); User user=new User(); user.setAge(10); user.setName("LL"); model.addAttribute("user",user); return "/result.jsp"; } 3)result.jsp 再html标签之前添加： <%@taglib uri="http://www.springframework.org/tags/form" prefix="fm"%> body标签中添加： <fm:form modelAttribute="user"> <fm:input path="username"/> <fm:input path="age"/> </fm:form> 必须添加modelAttribute="user" 如果不想添加则再Controller的model.addAttribute("user",user);中"user"改成"command" 因为form默认为command 4、check-box标签的使用 1）MyController @RequestMapping("testCheckBox/{id}") public String testCheckBox(@PathVariable Integer id, Model model){ System.out.println(id); User user=new User(); user.setAge(10); user.setUsername("LL"); user.setGender(0); String[] hobby=new String[]{"篮球","足球"}; user.setHobby(hobby); model.addAttribute("user",user); ArrayList<Object> arrayList=new ArrayList<>(); arrayList.add("足球"); arrayList.add("篮球"); arrayList.add("乒乓求"); model.addAttribute("allhobby",arrayList); return "/result.jsp"; } 2)index.jsp <a href="${pageContext.request.contextPath}/testCheckBox/1">测试testCheckBox更新</a> 3)result.jsp <fm:form modelAttribute="user"> <fm:input path="username"/> <fm:input path="age"/> 性别：<fm:radiobutton path="gender" value="0" label="男"/> <fm:radiobutton path="gender" value="1" label="女"/> 爱好:<fm:checkboxes path="hobby" items="${allhobby}"/> </fm:form> 再上述基础上进行修改： 1)index.jsp <a href="${pageContext.request.contextPath}/testCheckBox/1">测试testCheckBox更新</a> 2)Conteolller @RequestMapping("update2") public String testCheckBox(User user){ System.out.println(user); return "/result2.jsp"; } 3)result.jsp <fm:form modelAttribute="user" action="${pageContext.request.contextPath}/pudate2"> <fm:input path="username"/> <fm:input path="age"/> 性别：<fm:radiobutton path="gender" value="0" label="男"/> <fm:radiobutton path="gender" value="1" label="女"/> 爱好:<fm:checkboxes path="hobby" items="${allhobby}"/> <input type="submit" value="修改"> </fm:form> 5、select标签使用 1)index.jsp <a href="${pageContext.request.contextPath}/testSelect">测试testSelect</a> 2)Controller @RequestMapping("testSelect") public String testSelect(@PathVariable Integer id, Model model){ ArrayList<Object> arrayList=new ArrayList<>(); arrayList.add("足球"); arrayList.add("篮球"); arrayList.add("乒乓求"); model.addAttribute("allhobby",arrayList); ArrayList<Object> petList=new ArrayList<>(); Pet pet1=new Pet(); pet1.setId(1); pet1.setName("狗"); Pet pet2=new Pet(); pet1.setId(1); pet1.setName("猫"); Pet pet3=new Pet(); pet1.setId(1); pet1.setName("老虎"); petList.add(pet1); petList.add(pet2); petList.add(pet3); model.addAttribute("petList",petList); System.out.println(id); User user=new User(); user.setAge(10); user.setUsername("LL"); user.setGender(0); String[] hobby=new String[]{"篮球","足球"}; user.setHobby(hobby); user.setPet(pet2); model.addAttribute("user",user); return "/result.jsp"; } 3)result.jsp <fm:form modelAttribute="user" action="${pageContext.request.contextPath}/pudate2"> <fm:input path="username"/> <fm:input path="age"/> 性别：<fm:radiobutton path="gender" value="0" label="男"/> <fm:radiobutton path="gender" value="1" label="女"/> 爱好:<fm:checkboxes path="hobby" items="${allhobby}"/> 宠物:<fm:select path="pet.id" items="${petList}" itemValue="id" itemLabel="name"/> <input type="submit" value="修改"> </fm:form> 6、服务器表单校验

十一、JSON数据格式处理

1、静态资源访问

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