SpringBoot实现文件上传功能

新建maven项目，pom文件：

 1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 2   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
 3   <modelVersion>4.0.0</modelVersion>
 4   <groupId>com.niiam</groupId>
 5   <artifactId>SBFileUpload</artifactId>
 6   <packaging>war</packaging>
 7   <version>0.0.1-SNAPSHOT</version>
 8   <name>SBFileUpload Maven Webapp</name>
 9   <url>http://maven.apache.org</url>
10   
11   <!-- 引入springboot组件 -->
12   <parent>
13       <groupId>org.springframework.boot</groupId>
14           <artifactId>spring-boot-starter-parent</artifactId>
15           <version>1.5.9.RELEASE</version>
16   </parent>
17   
18   <dependencies>
19      <dependency>
20          <groupId>org.springframework.boot</groupId>
21          <artifactId>spring-boot-starter-web</artifactId>
22      </dependency>
23      <dependency>
24          <groupId>org.springframework.boot</groupId>
25          <artifactId>spring-boot-starter-test</artifactId>
26          <scope>test</scope>
27      </dependency>
28      <!-- 引入json组件 -->
29      <dependency>
30          <groupId>com.jayway.jsonpath</groupId>
31          <artifactId>json-path</artifactId>
32          <scope>test</scope>
33      </dependency>
34      
35     <!-- 使得内嵌的Tomcat不可见，用于导出war包 -->
36     <dependency>
37         <groupId>org.springframework.boot</groupId>
38         <artifactId>spring-boot-starter-tomcat</artifactId>
39         <scope>provided</scope>
40     </dependency>
41     
42   </dependencies>
43   
44   <!-- 制定Java编译版本，用于消除IDE关于JRE版本的warning -->
45   <properties>
46         <java.version>9</java.version>
47   </properties>
48   
49   <build>
50     <finalName>SBFileUpload</finalName>
51         <plugins>
52             <plugin>
53                 <groupId>org.springframework.boot</groupId>
54                 <artifactId>spring-boot-maven-plugin</artifactId>
55             </plugin>
56         </plugins>
57   </build>
58   
59   <repositories>
60     <repository>
61         <id>spring-releases</id>
62         <url>https://repo.spring.io/libs-release</url>
63     </repository>
64   </repositories>
65   <pluginRepositories>
66     <pluginRepository>
67         <id>spring-releases</id>
68         <url>https://repo.spring.io/libs-release</url>
69     </pluginRepository>
70   </pluginRepositories>
71   
72 </project>

 

Test.html文件：

 1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  
 2 <html>  
 3 <head>  
 4 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">  
 5 <title>Insert title here</title>  
 6 <script type="text/javascript" src="http://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>  
 7 
 8 </head>  
 9 <body>  
10 <form id="formId" action="/SBFileUpload/testUpload" target="frame1" method="POST" enctype="multipart/form-data">  
11     <input type="file" name="file"/>  
12     <input type="button" value="提交" onclick="upload()">  
13 </form>  
14 
15 <iframe name="frame1" frameborder="0" height="40"></iframe>
16 
17 <script type="text/javascript">
18     function upload() {
19         $("#formId").submit();
20     }
21 </script>
22 
23 </body>  
24 </html>

注意：

1、第10行，action里要指明项目名，这样在跳转时才能跳转到该项目的链接中

2、为了防止点击提交按键后页面跳转，此处设置了iframe标签，用于点击按键后发送ajax指令。

 

后台Java代码：

Application.java

 1 package com.niiam;
 2 
 3 import org.springframework.boot.SpringApplication;
 4 import org.springframework.boot.autoconfigure.SpringBootApplication;
 5 
 6 import org.springframework.boot.builder.SpringApplicationBuilder;
 7 import org.springframework.boot.web.support.SpringBootServletInitializer;
 8 
 9 @SpringBootApplication
10 public class Application extends SpringBootServletInitializer{
11     
12     @Override
13     protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
14         return application.sources(Application.class);
15     }
16     
17     public static void main(String[] args) {
18         SpringApplication.run(Application.class, args);
19     }
20 }

 

Controller.java

 1 package com.niiam;
 2 
 3 import org.springframework.web.bind.annotation.RequestMapping;
 4 import org.springframework.web.bind.annotation.RestController;
 5 import org.springframework.web.multipart.MultipartHttpServletRequest;
 6 import org.springframework.web.bind.annotation.RequestMethod;
 7 
 8 import java.io.*;
 9 
10 import javax.servlet.http.HttpServletRequest;
11 
12 @RestController
13 public class Controller {    
14     @RequestMapping(value="/testUpload",method=RequestMethod.POST)  
15     public void testUploadFile(HttpServletRequest req,MultipartHttpServletRequest multiReq) throws IOException{  
16         FileOutputStream fos=new FileOutputStream(new File("E://fileuploadtest//src//file//upload.jpg"));  
17         FileInputStream fs=(FileInputStream) multiReq.getFile("file").getInputStream();  
18         byte[] buffer=new byte[1024];  
19         int len=0;  
20         while((len=fs.read(buffer))!=-1){  
21             fos.write(buffer, 0, len);  
22         }  
23         fos.close();  
24         fs.close();  
25     }
26 }

 

如果上传的文件大于 1M 时，上传会报错文件太大的错误，在 application.properties 中设置上传文件的参数即可

spring.http.multipart.maxFileSize=100Mb
spring.http.multipart.maxRequestSize=100Mb

 

 application.properties可以自己新建，放在这里：（该文件可以放在4个地方，详情百度）

 

 

三种方法测试：

1、右键点击Test.html，选择run on server

2、项目Export为war包，放在Tomcat上运行

 

结果展示：

 

posted @ 2018-01-11 16:07  知乐  阅读(11205)  评论(0)  编辑  收藏  举报