解决使用Spring Boot、Multipartfile上传文件路径错误问题

1.问题描述

java.io.IOException:
java.io.FileNotFoundException: /tmp/tomcat.273391201583741210.8080/work/Tomcat/localhost/ROOT/tmp/source/IMG_20160129_132623.jpg (No such file or directory)

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// 前端传入mulFileSource
// 创建压缩前源文件
File fileSourcePath = new File("tmp/source/");
File fileSource = new File(fileSourcePath, mulFileSource.getOriginalFilename());
if (!fileSourcePath.exists()) {
fileSourcePath.mkdirs();
}
// 将接收得图片暂存到临时文件中
mulFileSource.transferTo(fileSource);

2.问题分析

项目路径/tmp/source/

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public class StandardMultipartHttpServletRequest extends AbstractMultipartHttpServletRequest {

//中间代码省略

/**
* Spring MultipartFile adapter, wrapping a Servlet 3.0 Part object.
*/
@SuppressWarnings("serial")
private static class StandardMultipartFile implements MultipartFile, Serializable {

//中间代码省略

@Override
public void transferTo(File dest) throws IOException, IllegalStateException {
this.part.write(dest.getPath());
}
}
}

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package org.apache.catalina.core;
/**
* Adaptor to allow {@link FileItem} objects generated by the package renamed
* commons-upload to be used by the Servlet 3.0 upload API that expects
* {@link Part}s.
*/
public class ApplicationPart implements Part {

//中间代码省略

@Override
public void write(String fileName) throws IOException {
File file = new File(fileName);
if (!file.isAbsolute()) {
file = new File(location, fileName);
}
try {
fileItem.write(file);
} catch (Exception e) {
throw new IOException(e);
}
}
}

location

file
= new File(location, fileName);

项目路径/tmp/source/

/tmp/tomcat.273391201583741210.8080/work/Tomcat/localhost/ROOT/tmp/source/

3.问题解决方案

location

location

location

location

main()

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/**
* 文件上传临时路径
*/
@Bean
MultipartConfigElement multipartConfigElement() {
MultipartConfigFactory factory = new MultipartConfigFactory();
factory.setLocation("/app/pttms/tmp");
return factory.createMultipartConfig();
}

Spring 4 MVC Single and Multiple File Upload Example with Tomcat

Software Used

Project Structure in Eclipse

Controller Class: Use of MultipartFile

@RequestParam("file") MultipartFile file

@RequestParam("file") MultipartFile[]  file

package com.concretepage;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
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;
@Controller
public class FileUploadController {
@RequestMapping(value="/singleUpload")
public String singleUpload(){
return "singleUpload";
}
@RequestMapping(value="/singleSave", method=RequestMethod.POST )
public @ResponseBody String singleSave(@RequestParam("file") MultipartFile file, @RequestParam("desc") String desc ){
System.out.println("File Description:"+desc);
String fileName = null;
if (!file.isEmpty()) {
try {
fileName = file.getOriginalFilename();
byte[] bytes = file.getBytes();
BufferedOutputStream buffStream =
new BufferedOutputStream(new FileOutputStream(new File("F:/cp/" + fileName)));
buffStream.write(bytes);
buffStream.close();
return "You have successfully uploaded " + fileName;
} catch (Exception e) {
return "You failed to upload " + fileName + ": " + e.getMessage();
}
} else {
return "Unable to upload. File is empty.";
}
}
@RequestMapping(value="/multipleUpload")
public String multiUpload(){
return "multipleUpload";
}
@RequestMapping(value="/multipleSave", method=RequestMethod.POST )
public @ResponseBody String multipleSave(@RequestParam("file") MultipartFile[] files){
String fileName = null;
String msg = "";
if (files != null && files.length >0) {
for(int i =0 ;i< files.length; i++){
try {
fileName = files[i].getOriginalFilename();
byte[] bytes = files[i].getBytes();
BufferedOutputStream buffStream =
new BufferedOutputStream(new FileOutputStream(new File("F:/cp/" + fileName)));
buffStream.write(bytes);
buffStream.close();
msg += "You have successfully uploaded " + fileName +"<br/>";
} catch (Exception e) {
return "You failed to upload " + fileName + ": " + e.getMessage() +"<br/>";
}
}
return msg;
} else {
return "Unable to upload. File is empty.";
}
}
}

Configuration Class: Use of MultipartConfigElement Bean

package com.concretepage;
import javax.servlet.MultipartConfigElement;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.context.embedded.MultipartConfigFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.view.JstlView;
import org.springframework.web.servlet.view.UrlBasedViewResolver;
@Configuration
@ComponentScan
@EnableWebMvc
@EnableAutoConfiguration
public class AppConfig {
@Bean
public MultipartConfigElement multipartConfigElement() {
MultipartConfigFactory factory = new MultipartConfigFactory();
factory.setMaxFileSize("128KB");
factory.setMaxRequestSize("128KB");
return factory.createMultipartConfig();
}
@Bean
public UrlBasedViewResolver setupViewResolver() {
UrlBasedViewResolver resolver = new UrlBasedViewResolver();
resolver.setPrefix("/views/");
resolver.setSuffix(".jsp");
resolver.setViewClass(JstlView.class);
return resolver;
}
}

WebApplicationInitializer Class: Use of Dynamic.setMultipartConfig()

package com.concretepage;
import javax.servlet.MultipartConfigElement;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration.Dynamic;
import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;
public class WebAppInitializer implements WebApplicationInitializer {
public void onStartup(ServletContext servletContext) throws ServletException {
AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();
ctx.register(AppConfig.class);
ctx.setServletContext(servletContext);
ctx.refresh();
Dynamic dynamic = servletContext.addServlet("dispatcher", new DispatcherServlet(ctx));
dynamic.addMapping("/");
dynamic.setLoadOnStartup(1);
dynamic.setMultipartConfig(ctx.getBean(MultipartConfigElement.class));
}
}

View: Use of enctype="multipart/form-data" and type="file"

<html>
<body>
<h1>Single File Upload</h1>
<form method="post" enctype="multipart/form-data" action="singleSave">
Upload File: <input type="file" name="file">
<br /><br />
Description: <input type="text" name="desc"/>
<br/><br/><input type="submit" value="Upload">
</form>
</body>
</html>

<html>
<body>
<h1> Multiple File Upload </h1>
<form method="post" enctype="multipart/form-data" action="multipleSave">
Upload File 1: <input type="file" name="file"> <br/>
Upload File 2: <input type="file" name="file"> <br/>
Upload File 3: <input type="file" name="file"> <br/>
Upload File 4: <input type="file" name="file"> <br/>
<br /><br /><input type="submit" value="Upload">
</form>
</body>
</html>

Spring Boot Jar Dependency using Gradle

apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'war'
archivesBaseName = 'CP'
repositories {
mavenCentral()
}
dependencies {
compile 'org.springframework.boot:spring-boot-starter-web:1.1.4.RELEASE'
compile 'org.springframework.boot:spring-boot-starter-security:1.1.4.RELEASE'
compile 'javax.servlet:jstl:1.2'
compile 'commons-fileupload:commons-fileupload:1.3.1'
}

Deploy in Tomcat 7 To Check Output

Download Source Code