标签：direct else start let exists 问题 log ns-3 3.0
运用SpringMVC的文件上传，我们只需要一些配置就可以了，很方便！
只需要一下几步就行：
1.新建xml文件，例如：a.xml 配置如下：
<?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"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"
default-lazy-init="true">
<!--Controller类的路径-->
<bean id="pickMaintainController" class="com.ly.controller.PickMaintainController"></bean>
</beans>
2.在spring-application.xml中添加配置如下:
<!-- 支持文件上传 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/> 在web.xml中添加配置如下: <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:resources/codeifAction.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet>
3.Controller类如下：红色标注为关键
@Controller
public class PickMaintainController {
@RequestMapping("batchUpload")
public String batchUpload(Model model, @RequestParam(value = "file", required = false) MultipartFile file, HttpServletRequest request) {
//上传文件操作
}
}
4.jsp页面：注意name值file和 MultipartFile file一样的
<form id="" method="post" action="" enctype="multipart/form-data"> <input type="file" id="file" name="file" /> </form>
想了想还把上传文件操作贴出来吧：不然你会苦恼的。。。
@RequestMapping("batchUpload")
public String batchUpload(Model model, @RequestParam(value = "file", required = false) MultipartFile file, HttpServletRequest request) {
//上传文件操作
String path = request.getSession().getServletContext().getRealPath("upload");
String fileName = file.getOriginalFilename();
System.out.println(path);
System.out.println(fileName);
File targetFile = new File(path, fileName);
if(!targetFile.exists()) {
targetFile.mkdirs();
}
//如果文件存在，就删除
deleteFiles(path+"\\"+fileName, fileName);
//保存
try{
file.transferTo(targetFile);
}catch(Exception e) {
e.printStackTrace();
System.out.println("文件保存失败！");
}
String filePath = request.getSession().getServletContext().getRealPath("upload")+"/"+fileName;
}
//删除指定路径下的文件
public static void deleteFiles(String path, String fileName){
File file = new File(path);
//1級文件刪除
if(!file.isDirectory() && file.getName().equals(fileName)){
file.delete();
}else if(file.isDirectory()){
//2級文件列表
String []filelist = file.list();
//获取新的二級路徑
for(int j=0;j<filelist.length;j++){
File filessFile= new File(path+"\\"+filelist[j]);
if(!filessFile.isDirectory() && file.getName().equals(fileName)){
filessFile.delete();
}else if(filessFile.isDirectory()){
//递归調用
deleteFiles(path+"\\"+filelist[j], fileName);
}
}
file.delete();
}
}
}
有问题请留言。。。。
标签：direct else start let exists 问题 log ns-3 3.0
原文地址：http://www.cnblogs.com/julinhuitianxia/p/7230113.html
