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
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<?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>
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