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>
