Spring MVC的应用
目录
1、创建项目与maven坐标配置
2、核心配置
3、启动项目测试
4、不同请求参数在controller的配置
4.1 servlet API
4.2 简单类型
4.3 pojo类型
4.4 日期类型
4.5 restful风格4种操作类型
4.5.1 GET：获取资源
4.5.2 POST：新建资源
4.5.3 PUT：更新资源
4.5.4 DELETE：删除资源
4.6 json类型
4.7 文件类型multipart
5、在控制器中处理异常
1、创建项目与maven坐标配置
创建项目
maven坐标配置
<dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version><scope>test</scope></dependency><!--引入spring webmvc的依赖--><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.1.12.RELEASE</version></dependency><!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version><scope>provided</scope></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><uriEncoding>UTF-8</uriEncoding></configuration></plugin></plugins>
</build>2、核心配置
src/main/webapp/WEB-INF/web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-appversion="4.0"xmlns="http://xmlns.jcp.org/xml/ns/javaee"xmlns:javaee="http://xmlns.jcp.org/xml/ns/javaee"xmlns:xml="http://www.w3.org/XML/1998/namespace"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"><display-name>Archetype Created Web Application</display-name><!--springmvc提供的针对post请求的编码过滤器--><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><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.xml</param-value></init-param></servlet><servlet-mapping><servlet-name>springmvc</servlet-name><!--方式一：带后缀，比如*.action *.do *.aaa该种方式比较精确、方便，在以前和现在企业中都有很大的使用比例方式二：/ 不会拦截 .jsp，但是会拦截.html等静态资源（静态资源：除了servlet和jsp之外的js、css、png等）为什么配置为/ 会拦截静态资源？？？因为tomcat容器中有一个web.xml（父），你的项目中也有一个web.xml（子），是一个继承关系父web.xml中有一个DefaultServlet, url-pattern 是一个 /此时我们自己的web.xml中也配置了一个 / ,覆写了父web.xml的配置为什么不拦截.jsp呢？因为父web.xml中有一个JspServlet，这个servlet拦截.jsp文件，而我们并没有覆写这个配置，所以springmvc此时不拦截jsp，jsp的处理交给了tomcat如何解决/拦截静态资源这件事？方式三：/* 拦截所有，包括.jsp--><!--拦截匹配规则的url请求，进入springmvc框架处理--><url-pattern>/</url-pattern></servlet-mapping>
</web-app>src/main/resources/springmvc.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:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beanshttps://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttps://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvchttps://www.springframework.org/schema/mvc/spring-mvc.xsd
"><!--开启controller扫描--><context:component-scan base-package="com.test.controller"/><!--配置springmvc的视图解析器--><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/jsp/"/><property name="suffix" value=".jsp"/></bean><!--静态资源配置，方案一--><!--原理：添加该标签配置之后，会在SpringMVC上下文中定义一个DefaultServletHttpRequestHandler对象这个对象如同一个检查人员，对进入DispatcherServlet的url请求进行过滤筛查，如果发现是一个静态资源请求那么会把请求转由web应用服务器（tomcat）默认的DefaultServlet来处理，如果不是静态资源请求，那么继续由SpringMVC框架处理--><!--<mvc:default-servlet-handler/>--><!--静态资源配置，方案二，SpringMVC框架自己处理静态资源mapping:约定的静态资源的url规则location：指定的静态资源的存放位置--><mvc:resources location="classpath:/" mapping="/resources/**"/><mvc:resources location="/WEB-INF/js/" mapping="/js/**"/></beans>配置完的目录结构：
3、启动项目测试
启动项目：
访问路径：http://localhost:8080/
出现Hello World！即为成功
4、不同请求参数在controller的配置
新建成功跳转页面
src/main/webapp/WEB-INF/jsp/success.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>Title</title>
</head>
<body>跳转成功！服务器时间：${date}
</body>
</html>新建Controller
com.test.controller.DemoController
@Controller
@RequestMapping("/demo")
public class DemoController {
}修改index.jsp
src/main/webapp/index.jsp
<%@ page isELIgnored="false" contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>SpringMVC 测试页</title>
</head>
<body><div><h2>不同请求参数测试</h2><fieldset></fieldset></div>
</body>
</html>4.1 servlet API
原生servlet对象： HttpServletRequest、HttpServletResponse、HttpSession
DemoController添加方法
/**
* SpringMVC对原⽣servlet api的⽀持
* url：http://localhost:8080/demo/handle01?name=测试姓名
*/
@RequestMapping("/handle01")
public ModelAndView handle01(HttpServletRequest request,HttpServletResponse response,HttpSession session) {String name = request.getParameter("name");System.out.println(name);ModelAndView modelAndView = new ModelAndView();modelAndView.addObject("date",new Date());modelAndView.setViewName("success");return modelAndView;
}index.jsp添加标签
<fieldset><p>测试用例：SpringMVC对原⽣servlet api的⽀持</p><a href="/demo/handle01?name=测试姓名">点击测试</a>
</fieldset>页面测试
或者路径访问：http://localhost:8080/demo/handle01?name=测试姓名
4.2 简单类型
简单数据类型：⼋种基本数据类型及其包装类型
参数类型推荐使⽤包装数据类型，因为基础数据类型不可以为null
DemoController添加方法
/**
* SpringMVC 接收简单数据类型参数
* url：http://localhost:8080/demo/handle02?id=10
*/
@RequestMapping("/handle02")
public ModelAndView handle02(@RequestParam("id") Integer id) {System.out.println(id);ModelAndView modelAndView = new ModelAndView();modelAndView.addObject("date",new Date());modelAndView.setViewName("success");return modelAndView;
}index.jsp添加标签
<fieldset><p>测试用例：SpringMVC 接收简单数据类型参数</p><a href="/demo/handle02?id=10">点击测试</a>
</fieldset>页面测试：http://localhost:8080/
或者路径访问：http://localhost:8080/demo/handle02?id=10
4.3 pojo类型
DemoController添加方法
/**
* SpringMVC 绑定Pojo类型参数
* url：http://localhost:8080/demo/handle03?id=10&username=测试名称
*/
@RequestMapping("/handle03")
public ModelAndView handle03(User user) {System.out.println(user);ModelAndView modelAndView = new ModelAndView();modelAndView.addObject("date",new Date());modelAndView.setViewName("success");return modelAndView;
}index.jsp添加标签
<fieldset><p>测试用例：SpringMVC接收pojo类型参数</p><a href="/demo/handle03?id=10&username=测试名称">点击测试</a>
</fieldset>页面测试：http://localhost:8080/
或者路径访问：http://localhost:8080/demo/handle02?id=10&username=测试名称
http://localhost:8080/demo/handle03?user.id=10&user.username=测试名称
4.4 日期类型
新增自定义类型转换器
com.test.converter.DateConverter
import org.springframework.core.convert.converter.Converter;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* 自定义类型转换器
* <源类型，目标类型>
*/
public class DateConverter implements Converter<String, Date> {@Overridepublic Date convert(String source) {// 完成字符串向⽇期的转换SimpleDateFormat simpleDateFormat = newSimpleDateFormat("yyyy-MM-dd");try {Date parse = simpleDateFormat.parse(source);return parse;} catch (ParseException e) {e.printStackTrace();}return null;}
}配置自定义类型转换器
springmvc.xml
<!-- ⾃动注册最合适的处理器映射器，处理器适配器(调⽤handler⽅法) -->
<mvc:annotation-driven conversion-service="conversionServiceBean"/>
<!--注册⾃定义类型转换器-->
<bean id="conversionServiceBean" class="org.springframework.format.support.FormattingConversionServiceFactoryBean"><property name="converters"><set><bean class="com.test.converter.DateConverter"/></set></property>
</bean>DemoController添加方法
/**
* SpringMVC 绑定⽇期类型参数
* url：http://localhost:8080/demo/handle04?birthday=2024-09-23
*/
@RequestMapping("/handle04")
public ModelAndView handle04(Date birthday) {System.out.println(birthday);ModelAndView modelAndView = new ModelAndView();modelAndView.addObject("date",new Date());modelAndView.setViewName("success");return modelAndView;
}index.jsp添加标签
<fieldset><p>测试⽤例：SpringMVC接收⽇期类型参数</p><a href="/demo/handle04?birthday=2024-09-23">点击测试</a>
</fieldset>页面测试：http://localhost:8080/
或者路径访问：http://localhost:8080/demo/handle04?birthday=2024-09-23
4.5 restful风格4种操作类型
restful风格的url中，只有表示资源的名称，没有操作类型的动词
restful风格的资源操作类型，是在http请求中的method方法中表示，包括get、post、put、delete
web.xml中配置请求⽅式过滤器（将特定的post请求转换为put和delete请求）
<!--配置springmvc请求⽅式转换过滤器，会检查请求参数中是否有_method参数，如果有就按照指定的请求⽅式进⾏转换-->
<filter><filter-name>hiddenHttpMethodFilter</filter-name><filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>
<filter-mapping><filter-name>hiddenHttpMethodFilter</filter-name><url-pattern>/*</url-pattern>
</filter-mapping>4.5.1 GET：获取资源
DemoController添加方法
/**
* SpringMVC对Restful风格url的支持--GET
* url：http://localhost:8080/demo/handle05/15
*/
@RequestMapping(value = "/handle05/{id}",method = RequestMethod.GET)
public ModelAndView handle05(@PathVariable("id")Integer id) {System.out.println(id);ModelAndView modelAndView = new ModelAndView();modelAndView.addObject("date",new Date());modelAndView.setViewName("success");return modelAndView;
}index.jsp添加标签
<fieldset><p>测试⽤例：SpringMVC对Restful风格url的支持--GET</p><a href="/demo/handle05/15">点击测试</a>
</fieldset>页面测试：http://localhost:8080/
或者路径访问：http://localhost:8080/demo/handle05/15
4.5.2 POST：新建资源
DemoController添加方法
/**
* SpringMVC对Restful风格url的支持--POST
* url：http://localhost:8080/demo/handle06
*/
@RequestMapping(value = "/handle06",method = RequestMethod.POST)
public ModelAndView handle06(String username) {System.out.println(username);ModelAndView modelAndView = new ModelAndView();modelAndView.addObject("date",new Date());modelAndView.setViewName("success");return modelAndView;
}index.jsp添加标签
<fieldset><p>测试⽤例：SpringMVC对Restful风格url的支持--POST</p><form method="post" action="/demo/handle06"><input type="text" name="username"/><input type="submit" value="提交rest_post请求"/></form>
</fieldset>页面测试：http://localhost:8080/
4.5.3 PUT：更新资源
DemoController添加方法
/**
* SpringMVC对Restful风格url的支持--PUT
* url：http://localhost:8080/demo/handle07/15/测试姓名
*/
@RequestMapping(value = "/handle07/{id}/{name}",method = RequestMethod.PUT)
public ModelAndView handle07(@PathVariable("id")Integer id,@PathVariable("name")String name) {System.out.println(id + "," +name);ModelAndView modelAndView = new ModelAndView();modelAndView.addObject("date",new Date());modelAndView.setViewName("success");return modelAndView;
}index.jsp添加标签
<fieldset><p>测试⽤例：SpringMVC对Restful风格url的支持--PUT</p><form method="post" action="/demo/handle07/15/测试姓名"><input type="hidden" name="_method" value="put"/><input type="submit" value="提交rest_put请求"/></form>
</fieldset>页面测试：http://localhost:8080/
4.5.4 DELETE：删除资源
DemoController添加方法
/**
* SpringMVC对Restful风格url的支持--PUT
* url：http://localhost:8080/demo/handle08/20
*/
@RequestMapping(value = "/handle08/{id}",method = RequestMethod.DELETE)
public ModelAndView handle08(@PathVariable("id")Integer id) {System.out.println(id);ModelAndView modelAndView = new ModelAndView();modelAndView.addObject("date",new Date());modelAndView.setViewName("success");return modelAndView;
}index.jsp添加标签
<fieldset><p>测试⽤例：SpringMVC对Restful风格url的支持--DELETE</p><form method="post" action="/demo/handle08/20"><input type="hidden" name="_method" value="delete"/><input type="submit" value="提交rest_delete请求"/></form>
</fieldset>页面测试：http://localhost:8080/
4.6 json类型
导包
<!--json数据交互所需jar，start-->
<dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-core</artifactId><version>2.9.0</version>
</dependency>
<dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.9.0</version>
</dependency>
<dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-annotations</artifactId><version>2.9.0</version>
</dependency>
<!--json数据交互所需jar，end-->添加js文件：src/main/webapp/WEB-INF/js/jquery.min.js
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b,c,d,e=cq||cr(),g=!0,h=this.elem,i=this.options;if(a||e>=i.duration+this.startTime){this.now=this.end,this.pos=this.state=1,this.update(),i.animatedProperties[this.prop]=!0;for(b in i.animatedProperties)i.animatedProperties[b]!==!0&&(g=!1);if(g){i.overflow!=null&&!f.support.shrinkWrapBlocks&&f.each(["","X","Y"],function(a,b){h.style["overflow"+b]=i.overflow[a]}),i.hide&&f(h).hide();if(i.hide||i.show)for(b in i.animatedProperties)f.style(h,b,i.orig[b]),f.removeData(h,"fxshow"+b,!0),f.removeData(h,"toggle"+b,!0);d=i.complete,d&&(i.complete=!1,d.call(h))}return!1}i.duration==Infinity?this.now=e:(c=e-this.startTime,this.state=c/i.duration,this.pos=f.easing[i.animatedProperties[this.prop]](this.state,c,0,1,i.duration),this.now=this.start+(this.end-this.start)*this.pos),this.update();return!0}},f.extend(f.fx,{tick:function(){var a,b=f.timers,c=0;for(;c<b.length;c++)a=b[c],!a()&&b[c]===a&&b.splice(c--,1);b.length||f.fx.stop()},interval:13,stop:function(){clearInterval(co),co=null},speeds:{slow:600,fast:200,_default:400},step:{opacity:function(a){f.style(a.elem,"opacity",a.now)},_default:function(a){a.elem.style&&a.elem.style[a.prop]!=null?a.elem.style[a.prop]=a.now+a.unit:a.elem[a.prop]=a.now}}}),f.each(cp.concat.apply([],cp),function(a,b){b.indexOf("margin")&&(f.fx.step[b]=function(a){f.style(a.elem,b,Math.max(0,a.now)+a.unit)})}),f.expr&&f.expr.filters&&(f.expr.filters.animated=function(a){return f.grep(f.timers,function(b){return a===b.elem}).length});var cv,cw=/^t(?:able|d|h)$/i,cx=/^(?:body|html)$/i;"getBoundingClientRect"in c.documentElement?cv=function(a,b,c,d){try{d=a.getBoundingClientRect()}catch(e){}if(!d||!f.contains(c,a))return d?{top:d.top,left:d.left}:{top:0,left:0};var g=b.body,h=cy(b),i=c.clientTop||g.clientTop||0,j=c.clientLeft||g.clientLeft||0,k=h.pageYOffset||f.support.boxModel&&c.scrollTop||g.scrollTop,l=h.pageXOffset||f.support.boxModel&&c.scrollLeft||g.scrollLeft,m=d.top+k-i,n=d.left+l-j;return{top:m,left:n}}:cv=function(a,b,c){var d,e=a.offsetParent,g=a,h=b.body,i=b.defaultView,j=i?i.getComputedStyle(a,null):a.currentStyle,k=a.offsetTop,l=a.offsetLeft;while((a=a.parentNode)&&a!==h&&a!==c){if(f.support.fixedPosition&&j.position==="fixed")break;d=i?i.getComputedStyle(a,null):a.currentStyle,k-=a.scrollTop,l-=a.scrollLeft,a===e&&(k+=a.offsetTop,l+=a.offsetLeft,f.support.doesNotAddBorder&&(!f.support.doesAddBorderForTableAndCells||!cw.test(a.nodeName))&&(k+=parseFloat(d.borderTopWidth)||0,l+=parseFloat(d.borderLeftWidth)||0),g=e,e=a.offsetParent),f.support.subtractsBorderForOverflowNotVisible&&d.overflow!=="visible"&&(k+=parseFloat(d.borderTopWidth)||0,l+=parseFloat(d.borderLeftWidth)||0),j=d}if(j.position==="relative"||j.position==="static")k+=h.offsetTop,l+=h.offsetLeft;f.support.fixedPosition&&j.position==="fixed"&&(k+=Math.max(c.scrollTop,h.scrollTop),l+=Math.max(c.scrollLeft,h.scrollLeft));return{top:k,left:l}},f.fn.offset=function(a){if(arguments.length)return a===b?this:this.each(function(b){f.offset.setOffset(this,a,b)});var c=this[0],d=c&&c.ownerDocument;if(!d)return null;if(c===d.body)return f.offset.bodyOffset(c);return cv(c,d,d.documentElement)},f.offset={bodyOffset:function(a){var b=a.offsetTop,c=a.offsetLeft;f.support.doesNotIncludeMarginInBodyOffset&&(b+=parseFloat(f.css(a,"marginTop"))||0,c+=parseFloat(f.css(a,"marginLeft"))||0);return{top:b,left:c}},setOffset:function(a,b,c){var d=f.css(a,"position");d==="static"&&(a.style.position="relative");var e=f(a),g=e.offset(),h=f.css(a,"top"),i=f.css(a,"left"),j=(d==="absolute"||d==="fixed")&&f.inArray("auto",[h,i])>-1,k={},l={},m,n;j?(l=e.position(),m=l.top,n=l.left):(m=parseFloat(h)||0,n=parseFloat(i)||0),f.isFunction(b)&&(b=b.call(a,c,g)),b.top!=null&&(k.top=b.top-g.top+m),b.left!=null&&(k.left=b.left-g.left+n),"using"in b?b.using.call(a,k):e.css(k)}},f.fn.extend({position:function(){if(!this[0])return null;var a=this[0],b=this.offsetParent(),c=this.offset(),d=cx.test(b[0].nodeName)?{top:0,left:0}:b.offset();c.top-=parseFloat(f.css(a,"marginTop"))||0,c.left-=parseFloat(f.css(a,"marginLeft"))||0,d.top+=parseFloat(f.css(b[0],"borderTopWidth"))||0,d.left+=parseFloat(f.css(b[0],"borderLeftWidth"))||0;return{top:c.top-d.top,left:c.left-d.left}},offsetParent:function(){return this.map(function(){var a=this.offsetParent||c.body;while(a&&!cx.test(a.nodeName)&&f.css(a,"position")==="static")a=a.offsetParent;return a})}}),f.each({scrollLeft:"pageXOffset",scrollTop:"pageYOffset"},function(a,c){var d=/Y/.test(c);f.fn[a]=function(e){return f.access(this,function(a,e,g){var h=cy(a);if(g===b)return h?c in h?h[c]:f.support.boxModel&&h.document.documentElement[e]||h.document.body[e]:a[e];h?h.scrollTo(d?f(h).scrollLeft():g,d?g:f(h).scrollTop()):a[e]=g},a,e,arguments.length,null)}}),f.each({Height:"height",Width:"width"},function(a,c){var d="client"+a,e="scroll"+a,g="offset"+a;f.fn["inner"+a]=function(){var a=this[0];return a?a.style?parseFloat(f.css(a,c,"padding")):this[c]():null},f.fn["outer"+a]=function(a){var b=this[0];return b?b.style?parseFloat(f.css(b,c,a?"margin":"border")):this[c]():null},f.fn[c]=function(a){return f.access(this,function(a,c,h){var i,j,k,l;if(f.isWindow(a)){i=a.document,j=i.documentElement[d];return f.support.boxModel&&j||i.body&&i.body[d]||j}if(a.nodeType===9){i=a.documentElement;if(i[d]>=i[e])return i[d];return Math.max(a.body[e],i[e],a.body[g],i[g])}if(h===b){k=f.css(a,c),l=parseFloat(k);return f.isNumeric(l)?l:k}f(a).css(c,h)},c,a,arguments.length,null)}}),a.jQuery=a.$=f,typeof define=="function"&&define.amd&&define.amd.jQuery&&define("jquery",[],function(){return f})})(window);DemoController添加方法
/**
* Ajax-json交互
* url：http://localhost:8080/demo/handle09
*/
@RequestMapping(value = "/handle09")
public @ResponseBody User handle09(@RequestBody User user) {user.setUsername("修改后的用户名");return user;
}index.jsp添加标签
<fieldset><p>测试⽤例：Ajax-json交互</p><input type="button" id="ajaxBtn" value="ajax-json提交"/>
</fieldset><script type="text/javascript" src="/js/jquery.min.js"></script>
<script>$(function() {$("#ajaxBtn").bind("click",function () {// 发送ajax请求$.ajax({url: '/demo/handle09',type: 'POST',data: '{"id":"1","username":"李四"}',contentType: 'application/json;charset=utf-8',dataType: 'json',success: function (data) {alert(data.username);}})})})
</script>页面测试：http://localhost:8080/
4.7 文件类型multipart
导包
<!--文件上传所需坐标-->
<dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.3.1</version>
</dependency>springmvc.xml配置文件上传解析器
<!--配置⽂件上传解析器，id是固定的multipartResolver-->
<bean id="multipartResolver"class="org.springframework.web.multipart.commons.CommonsMultipartResolver"><!--设置上传⼤⼩，单位字节--><property name="maxUploadSize" value="1000000000"/>
</bean>DemoController添加方法
/**
* 文件上传
*/
@RequestMapping("upload")
public String upload(MultipartFile uploadFile, HttpSession session) throws IOException {// 获取文件原名String originalFilename = uploadFile.getOriginalFilename();// 原始名称// 获取文件的扩展名String ext = originalFilename.substring(originalFilename.lastIndexOf(".") + 1);// 新文件名String newName = UUID.randomUUID().toString() + "." + ext;// 存储,要存储到指定的文件夹，/uploads/yyyy-MM-dd，考虑文件过多的情况按照日期，生成一个子文件夹String realPath = session.getServletContext().getRealPath("/uploads");String datePath = new SimpleDateFormat("yyyy-MM-dd").format(new Date());File folder = new File(realPath + "/" + datePath);if(!folder.exists()) {folder.mkdirs();}// 存储文件到目录uploadFile.transferTo(new File(folder,newName));return "success";
}index.jsp添加标签
<fieldset><p>测试⽤例：上传文件</p><form method="post" enctype="multipart/form-data" action="/demo/upload"><input type="file" name="uploadFile"/><input type="submit" value="上传"/></form>
</fieldset>页面测试：http://localhost:8080/
5、在控制器中处理异常
添加错误显示页面：src/main/webapp/WEB-INF/jsp/error.jsp
<%@ page language="java" isELIgnored="false" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<html>
<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>Insert title here</title>
</head>
<body>异常信息: ${msg}
</body>
</html>添加异常捕捉处理类：com/test/controller/GlobalExceptionResolver.java
// 可以让我们优雅的捕获所有Controller对象handler方法抛出的异常
@ControllerAdvice
public class GlobalExceptionResolver {@ExceptionHandler(ArithmeticException.class)public ModelAndView handleException(ArithmeticException exception, HttpServletResponse response) {ModelAndView modelAndView = new ModelAndView();modelAndView.addObject("msg",exception.getMessage());modelAndView.setViewName("error");return modelAndView;}
}DemoController添加方法
/**
* 异常处理测试
* url：http://localhost:8080/demo/handle10
*/
@RequestMapping("/handle10")
public ModelAndView handle10(HttpServletRequest request) {int i = 10/0;ModelAndView modelAndView = new ModelAndView();modelAndView.addObject("date",new Date());modelAndView.setViewName("success");return modelAndView;
}index.jsp添加标签
<fieldset><p>测试用例：异常处理测试</p><a href="/demo/handle10">点击测试</a>
</fieldset>页面测试：http://localhost:8080/
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