详解spring mvc(注解)上传文件的简单例子
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2024-03-08 20:22:40
spring mvc(注解)上传文件的简单例子。
这有几个需要注意的地方
1.form的enctype=”multipart/form-data” 这个是上传文件必...
spring mvc(注解)上传文件的简单例子。
这有几个需要注意的地方
1.form的enctype=”multipart/form-data” 这个是上传文件必须的
2.applicationcontext.xml中 <bean id=”multipartresolver” class=”org.springframework.web.multipart.commons.commonsmultipartresolver”/> 关于文件上传的配置不能少
3、亲这两个jar包不能少哦,之前就是因为少了这个两个jar,一直报一些奇葩的错,给我累了个半死~(版本没什么要求)
commons-fileupload-1.2.2.jar
commons-io-2.0.1.jar
大家可以看具体代码如下:
web.xml
<?xml version="0" encoding="utf-8"?> <web-app xmlns:xsi="http://wwwworg/2001/xmlschema-instance" xmlns="http://javasuncom/xml/ns/javaee" xmlns:web="http://javasuncom/xml/ns/javaee/web-app_2_xsd" xsi:schemalocation="http://javasuncom/xml/ns/javaee http://javasuncom/xml/ns/javaee/web-app_2_xsd" id="webapp_id" version="5"> <display-name>webtest</display-name> <listener> <listener-class>orgspringframeworkwebcontextcontextloaderlistener</listener-class> </listener> <context-param> <param-name>contextconfiglocation</param-name> <param-value> /web-inf/config/applicationcontextxml /web-inf/config/codeifactionxml </param-value> </context-param> <servlet> <servlet-name>dispatcherservlet</servlet-name> <servlet-class>orgspringframeworkwebservletdispatcherservlet</servlet-class> <init-param> <param-name>contextconfiglocation</param-name> <param-value>/web-inf/config/codeifactionxml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <!-- 拦截所有以do结尾的请求 --> <servlet-mapping> <servlet-name>dispatcherservlet</servlet-name> <url-pattern>*do</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>indexdo</welcome-file> </welcome-file-list> </web-app>
applicationcontext.xml
<?xml version="0" encoding="utf-8"?> <beans xmlns="http://wwwspringframeworkorg/schema/beans" xmlns:xsi="http://wwwworg/2001/xmlschema-instance" xmlns:p="http://wwwspringframeworkorg/schema/p" xmlns:context="http://wwwspringframeworkorg/schema/context" xsi:schemalocation="http://wwwspringframeworkorg/schema/beans http://wwwspringframeworkorg/schema/beans/spring-beans-xsd http://wwwspringframeworkorg/schema/context http://wwwspringframeworkorg/schema/context/spring-context-xsd" default-lazy-init="true"> <!-- 启动spring mvc的注解功能,完成请求和注解pojo的映射 --> <bean class="orgspringframeworkwebservletmvcannotationannotationmethodhandleradapter" lazy-init="false" /> <!-- 另外最好还要加入defaultannotationhandlermapping,不然会被 xml或其它的映射覆盖! --> <bean class="orgspringframeworkwebservletmvcannotationdefaultannotationhandlermapping" /> <!-- 对模型视图名称的解析,即在模型视图名称添加前后缀 --> <bean class="orgspringframeworkwebservletviewinternalresourceviewresolver" p:prefix="/web-inf/jsp/" p:suffix="jsp" /> <!-- 支持上传文件 --> <bean id="multipartresolver" class="orgspringframeworkwebmultipartcommonscommonsmultipartresolver"/> </beans>
codeifaction.xml
<?xml version="0" encoding="utf-8"?> <beans xmlns="http://wwwspringframeworkorg/schema/beans" xmlns:xsi="http://wwwworg/2001/xmlschema-instance" xmlns:context="http://wwwspringframeworkorg/schema/context" xsi:schemalocation="http://wwwspringframeworkorg/schema/beans http://wwwspringframeworkorg/schema/beans/spring-beans-xsd http://wwwspringframeworkorg/schema/context http://wwwspringframeworkorg/schema/context/spring-context-xsd" default-lazy-init="true"> <bean id="uploadaction" class="comcodeifactionuploadaction" /> </beans>
uploadaction.java
package comcodeifaction; import javaiofile; import javautildate; import javaxservlethttphttpservletrequest; import orgspringframeworkstereotypecontroller; import orgspringframeworkuimodelmap; import orgspringframeworkwebbindannotationrequestmapping; import orgspringframeworkwebbindannotationrequestparam; import orgspringframeworkwebmultipartmultipartfile; @controller public class uploadaction { @requestmapping(value = "/uploaddo") public string upload(@requestparam(value = "file", required = false) multipartfile file, httpservletrequest request, modelmap model) { systemoutprintln("开始"); string path = requestgetsession()getservletcontext()getrealpath("upload"); string filename = filegetoriginalfilename(); // string filename = new date()gettime()+"jpg"; systemoutprintln(path); file targetfile = new file(path, filename); if(!targetfileexists()){ targetfilemkdirs(); } //保存 try { filetransferto(targetfile); } catch (exception e) { eprintstacktrace(); } modeladdattribute("fileurl", requestgetcontextpath()+"/upload/"+filename); return "result"; } }
index.jsp
<%@ page pageencoding="utf-8"%> <!doctype html> <html> <head> <meta charset="utf-8"> <title>上传图片</title> </head> <body> <form action="uploaddo" method="post" enctype="multipart/form-data"> <input type="file" name="file" /> <input type="submit" value="submit" /></form> </body> </html>
web-inf/jsp/下的result.jsp
<%@ page pageencoding="utf-8"%> <!doctype html> <html> <head> <meta charset="utf-8"> <title>上传结果</title> </head> <body> <img alt="" src="${fileurl }" /> </body> </html>
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
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