spring文件上传的几种方式

文件上传 传统方式
借助第三方组件实现文件上传：
UserController.java编写：

文件上传 传统方式

前端表单index.jsp代码：
<%@ page language=“java” contentType=“text/html; charset=UTF-8”
pageEncoding=“UTF-8”%>

文件上传

传统方法上传文件 选择文件，
springmvc上传文件 选择文件，

运行截图：

借助第三方组件实现文件上传：

导入 写入配置pom.xml
UserController.java编写：
@Controller
@RequestMapping("/user")
public class UserController {
@RequestMapping("/file")
public String fileUpLoad(HttpServletRequest request) throws Exception {
System.out.println(“文件上传”);
//文件上传位置
String path = request.getSession().getServletContext().getRealPath("/uploads/");
File file = new File(path);

	if (!file.exists()) {
		// 判断文件存在否，创建该文件夹
		file.mkdirs();
	}
	DiskFileItemFactory factory = new DiskFileItemFactory();
	ServletFileUpload upload = new ServletFileUpload(factory);
		//解析request
	List<FileItem> items =upload.parseRequest(request);
		//遍历
	for (FileItem item : items) {
		// 判断当前对象item是否是上传文件项
		if (item.isFormField()) {
			// true 说明为普通表单项
		} else {
			// 说明上传文件项
			// 获取上传文件名称
			String filename = item.getName();
 
			try {
				// 完成文件上传
				item.write(new File(path, filename));
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			// 删除临时文件
			item.delete();
		}
	}
 
	return "success";
}

}

springmvc.xml配置

<?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:mvc=“http://www.springframework.org/schema/mvc”
xmlns:p=“http://www.springframework.org/schema/p” xmlns:context=“http://www.springframework.org/schema/context”
xsi:schemaLocation=“http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd”

<!--开启注解扫描-->
<context:component-scan base-package="com.tao.*"/>
 
<!--配置视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
      p:prefix="/WEB-INF/pages/" p:suffix=".jsp" />

<mvc:resources location="/css/" mapping="/css/**"/>
<mvc:resources location="/images/" mapping="/images/**"/>
<mvc:resources location="/js/" mapping="/js/**"/>
<!--开启springmvc框架注解的支持-->
<mvc:annotation-driven/>
                <!-- 配置 文件上传的支持 -->  
            <bean  class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  
                <property name="maxUploadSize" value="1024000000"/>  
                <property name="resolveLazily" value="true"/>  
                <property name="maxInMemorySize" value="4096"/>  
                <property name="defaultEncoding" value="UTF-8"/>  
            </bean>
<context:annotation-config></context:annotation-config>
</beans>

controller02.java
@Controller
@RequestMapping("/user")
public class Controller02 {
@RequestMapping("/load2")
public String fileUpload(HttpServletRequest request,MultipartFile upload)throws Exception {
System.out.println(“文件上传”);
String path=request.getSession().getServletContext().getRealPath("/upload/");

 File file=new File(path);
 //判断路径是否存在
 if (!path.isEmpty()) {
	file.mkdir();
 }
//上传文件唯一名修改
 String filename=upload.getOriginalFilename();
 String uuid=UUID.randomUUID().toString().replace("-", "");
 filename=uuid+"_"+filename;
 //文件保存
 upload.transferTo(new File(path,filename));
 return "success";

}
}

springmvc上传文件原理图示：
[详情有道笔记]