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  • SpringMvc下的文件上传

    首先是springmvc.xml

    <?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"
           xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:p="http://www.springframework.org/schema/p"
           xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.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">
    
    
        <!-- 配置自动扫描的包 -->
        <context:component-scan base-package="springmvc"></context:component-scan>
    
        <!-- 配置视图解析器 如何把handler 方法返回值解析为实际的物理视图 -->
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name = "prefix" value="/WEB-INF/"></property>
            <property name = "suffix" value = ".jsp"></property>
        </bean>
    
        <!-- 支持上传文件 -->
        <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>
    
    </beans>

    重点是最后的配置multipartResolver;其次有一个坑就是网上部分教程没告诉我们要引入两个必须的jar包common-fileupload和common-io。

    还有一点是form表单中的enctype="multipart/form-data"属性记得配置。

    下面是创建目录和文件以及展示上传页面的代码:

    package springmvc.action;
    
    /**
     * Created by alden on 2017/1/3.
     */
    
    import java.io.File;
    import java.util.Date;
    
    import javax.servlet.http.HttpServletRequest;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.ModelMap;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    import org.springframework.web.multipart.MultipartFile;
    
    @Controller
    @RequestMapping("/Upload")
    public class UploadController {
    //上传界面 @RequestMapping(
    "/UploadPage") public String UploadPage() { return "Upload/UploadFile"; } @RequestMapping(value = "/UploadFile") public String upload(@RequestParam(value = "file", required = false) MultipartFile file, HttpServletRequest request, ModelMap model) { System.out.println("开始"); String path = request.getSession().getServletContext().getRealPath("upload"); String fileName = file.getOriginalFilename(); // String fileName = new Date().getTime()+".jpg"; System.out.println(path); File targetFile = new File(path, fileName); if (!targetFile.exists()) { targetFile.mkdirs(); } //保存 try { file.transferTo(targetFile); } catch (Exception e) { e.printStackTrace(); } model.addAttribute("fileUrl", request.getContextPath() + "/upload/" + fileName); return "Upload/Result"; } }
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  • 原文地址:https://www.cnblogs.com/alden-it/p/6248409.html
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