[二十]SpringBoot 之（多）文件上传

（1）新建maven Java project

新建一个名称为spring-boot-fileuploadmaven java项目

（2）在pom.xml加入相应依赖；

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId>me.shijunjie</groupId>

    <artifactId>spring-boot-fileuploadmaven</artifactId>

    <version>0.0.1-SNAPSHOT</version>

    <packaging>jar</packaging>

    <name>spring-boot-fileuploadmaven</name>

    <url>http://maven.apache.org</url>

    <properties>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

    </properties>

    <parent>

        <groupId>org.springframework.boot</groupId>

        <artifactId>spring-boot-starter-parent</artifactId>

        <version>1.3.4.RELEASE</version>

    </parent>

    <dependencies>

        <dependency>

            <groupId>junit</groupId>

            <artifactId>junit</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

        <!-- thmleaf模板依赖. -->

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-thymeleaf</artifactId>

        </dependency>

    </dependencies>

    <build>

        <plugins>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin </artifactId>

            </plugin>

            <!-- <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin

                </artifactId> <dependencies> springloaded hotdeploy <dependency> <groupId>org.springframework</groupId>

                <artifactId>springloaded</artifactId> <version>1.2.4.RELEASE</version> </dependency>

                </dependencies> <executions> <execution> <goals> <goal>repackage</goal> </goals>

                <configuration> <classifier>exec</classifier> </configuration> </execution>

                </executions> </plugin> -->

            <!-- java编译插件 -->

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-compiler-plugin</artifactId>

                <configuration>

                    <source>1.8</source>

                    <target>1.8</target>

                    <encoding>UTF-8</encoding>

                </configuration>

            </plugin>

        </plugins>

    </build>

</project>

（3）新建一个表单页面（这里使用thymeleaf）

在src/main/resouces新建templates(如果看过博主之前的文章，应该知道，templates是spring boot存放模板文件的路径)，在templates下新建一个file.html:

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml"

    xmlns:th="http://www.thymeleaf.org"

    xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">

<head>

<title>Hello World!</title>

</head>

<body>

    <form method="POST" enctype="multipart/form-data" action="/upload">

        <p>

            文件：<input type="file" name="file" />

        </p>

        <p>

            <input type="submit" value="上传" />

        </p>

    </form>

</body>

</html>

（4）编写controller;

package me.shijunjie.controller;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.bind.annotation.ResponseBody;

import org.springframework.web.multipart.MultipartFile;

import org.springframework.web.multipart.MultipartHttpServletRequest;

@Controller

public class FileUploadController {

    //访问路径为：http://127.0.0.1:8080/file

    @RequestMapping("/file")

    public String file(){

        return "/file";

    }

    @RequestMapping("/mutifile")

    public String mutifile(){

        return "/mutifile";

    }

    @RequestMapping("/upload")

    @ResponseBody

    public String handleFileUpload(@RequestParam("file")MultipartFile file){

        if(!file.isEmpty()){

            try {

                BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(new File(file.getOriginalFilename())));

                out.write(file.getBytes());

                out.flush();

                out.close();

            }catch(FileNotFoundException e) {

                e.printStackTrace();

                return "上传失败,"+e.getMessage();

            }catch (IOException e) {

                e.printStackTrace();

                return "上传失败,"+e.getMessage();

            }

            return "上传成功";

        }else{

            return "上传失败，因为文件是空的.";

        }

    }

    /**

     * 多文件具体上传时间，主要是使用了MultipartHttpServletRequest和MultipartFile

     * @param request

     * @return

     */

    @RequestMapping(value="/batch/upload", method=RequestMethod.POST)

    public @ResponseBody

    String handleFileUpload(HttpServletRequest request){

        List<MultipartFile> files =((MultipartHttpServletRequest)request).getFiles("file");

        MultipartFile file = null;

        BufferedOutputStream stream = null;

        for (int i =0; i< files.size(); ++i) {

            file = files.get(i);

            if (!file.isEmpty()) {

                try {

                    byte[] bytes = file.getBytes();

                    stream =

                            new BufferedOutputStream(new FileOutputStream(new File(file.getOriginalFilename())));

                    stream.write(bytes);

                    stream.close();

                } catch (Exception e) {

                    stream =  null;

                    return "You failed to upload " + i + " =>" + e.getMessage();

                }

            } else {

                return "You failed to upload " + i + " becausethe file was empty.";

            }

        }

        return "upload successful"; 

    }

}

（6）对上传的文件做一些限制；

package me.shijunjie.spring_boot_fileuploadmaven;

import javax.servlet.MultipartConfigElement;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.boot.context.embedded.MultipartConfigFactory;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.ComponentScan;

@SpringBootApplication

@ComponentScan(value="me.shijunjie")

public class App

{

    @Bean

    public MultipartConfigElement multipartConfigElement() {

        MultipartConfigFactory factory = new MultipartConfigFactory();

        //// 设置文件大小限制 ,超了，页面会抛出异常信息，这时候就需要进行异常信息的处理了;

        factory.setMaxFileSize("128KB"); //KB,MB

        /// 设置总上传数据总大小

        factory.setMaxRequestSize("256KB");

        //Sets the directory location wherefiles will be stored.

        //factory.setLocation("路径地址");

        return factory.createMultipartConfig();

    } 

    public static void main( String[] args )

    {

        SpringApplication.run(App.class, args);

    }

}

多文件上传差不多，可以参照http://blog.csdn.net/linxingliang/article/details/52077816

巴特西

[二十]SpringBoot 之（多）文件上传

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巴特西

[二十]SpringBoot 之 （多）文件上传

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[二十]SpringBoot 之（多）文件上传