SpringBoot第 6 讲：SpringBoot+jersey跨域文件上传

一、创建Maven项目

参考：SpringBoot第 1 讲：HelloWorld_秦毅翔的专栏-CSDN博客

二、修改pom.xm 

<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><!-- SpringBoot支持01、parent:Begin --><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>1.5.2.RELEASE</version></parent><!-- SpringBoot支持01、parent:End --><groupId>org.personal.qin.demos</groupId><artifactId>upload_demo</artifactId><version>1.0.0-SNAPSHOT</version><packaging>jar</packaging><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><!-- java版本 --><java.version>1.8</java.version></properties><dependencies><!-- SpringBoot:Begin --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><!-- SpringBoot:End --><!-- SpringMVC:Begin --><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId></dependency><!-- SpringMVC:End --><!-- 文件上传:Begin --><dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.3.1</version></dependency><!-- 文件上传:End --><!--跨服务器上传:Begin --><dependency><groupId>com.sun.jersey</groupId><artifactId>jersey-client</artifactId><version>1.19</version></dependency><dependency><groupId>com.sun.jersey</groupId><artifactId>jersey-core</artifactId><version>1.19</version></dependency><!--跨服务器上传:End --></dependencies><build><finalName>${project.artifactId}</finalName><plugins><!-- 资源文件拷贝插件 --><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-resources-plugin</artifactId><configuration><encoding>UTF-8</encoding></configuration></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><!-- SpringBoot支持03、添加SpringBoot的插件支持:Begin --><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin><!-- SpringBoot支持03、添加SpringBoot的插件支持:End --></plugins></build>
</project>

三、本站文件上传

package demo.upload.controller;import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Date;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;import demo.upload.entity.FileInfo;/*** 本站文件上传*/
@RestController
@RequestMapping("/file")
public class TestFileController {private String folder = "/Volumes/Elements_Mac/WorkSpace/spring_boot/upload_demo";@PostMappingpublic FileInfo upload(MultipartFile file) throws Exception {System.out.println(file.getName());System.out.println(file.getOriginalFilename());System.out.println(file.getSize());File localFile = new File(folder, new Date().getTime()+".txt");//		file.getInputStream(); //读取文件的输入流，之后就可以写到其他的文件服务器了file.transferTo(localFile); //将上传的文件内容写入到本地指定的文件中return new FileInfo(localFile.getAbsolutePath(), localFile.getPath());}@GetMapping("/{id}")public void download(@PathVariable String id, HttpServletRequest request, HttpServletResponse response) {try( //jdk7以后的语法，执行之后，jdk会自动关流，无需提供finally手动关流InputStream inputStream = new FileInputStream(folder+"/"+id+".txt");OutputStream outputStream = response.getOutputStream();	){response.setContentType("application/x-download");response.addHeader("Content-Disposition", "attachment;filename=test.txt");//将文件的输入流复制到输出流中（将文件的内容写到response中）IOUtils.copy(inputStream, outputStream);outputStream.flush();} catch (Exception e) {e.printStackTrace();}}
}

四、跨域文件上传

4.1、Jesy跨域文件上传工具类

package demo.upload.utils;import java.io.IOException;
import java.util.Date;
import java.util.Random;import javax.servlet.http.HttpServletRequest;import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.WebResource;import demo.upload.entity.FileInfo;/*** 跨服务器文件上传工具类* * @author qin**/
public class JesyFileUploadUtil {/*** 上传文件* * @param request --从request对象中获取上传的文件* @param fileName --文件名* @param servlerUrl --服务器路径http://127.0.0.1:8080/ssm_image_server* @return* @throws IOException */public static FileInfo uploadFile(HttpServletRequest request, String fileName, String serverUrl) throws IOException {//把request请求转换成多媒体的请求对象MultipartHttpServletRequest mh = (MultipartHttpServletRequest) request;//根据文件名获取文件对象MultipartFile cm = mh.getFile(fileName);//获取文件的上传流byte[] fbytes = cm.getBytes();//重新设置文件名String newFileName = "";newFileName += new Date().getTime()+""; //将当前时间获得的毫秒数拼接到新的文件名上//随机生成一个3位的随机数Random r = new Random();for(int i=0; i<3; i++) {newFileName += r.nextInt(10); //生成一个0-10之间的随机整数}//获取文件的扩展名String orginalFilename = cm.getOriginalFilename();String suffix = orginalFilename.substring(orginalFilename.indexOf("."));//创建jesy服务器，进行跨服务器上传Client client = Client.create();//把文件关联到远程服务器//http://127.0.0.1:8080/ssm_image_server/upload/123131312321.jpgWebResource resource = client.resource(serverUrl+"/upload/"+newFileName+suffix);//上传resource.put(String.class, fbytes);//图片上传成功后要做的事儿//1、ajax回调函数做图片回显（需要图片的完整路径）//2、将图片的路径保存到数据库（需要图片的相对路径）String fullPath = serverUrl+"/upload/"+newFileName+suffix; //全路径String relativePath = "/upload/"+newFileName+suffix; //相对路径//		//生成一个json响应给客户端
//		String resultJson = "{\"fullPath\":\""+fullPath+"\", \"relativePath\":\""+relativePath+"\"}";
//		return resultJson;return new FileInfo(fullPath, relativePath);}
}

4.2、RestController

package demo.upload.controller;import java.io.IOException;import javax.servlet.http.HttpServletRequest;import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;import demo.upload.entity.FileInfo;
import demo.upload.utils.JesyFileUploadUtil;/*** 跨域文件上传*/
@RestController
@RequestMapping("jersey")
public class TestJerseyUploadController {private final String PIC_URL = "http://127.0.0.1:8080/ssm_image_server";@PostMapping(value="uploadPic")@ResponseBodypublic FileInfo uploadPic(HttpServletRequest reqeust, String fileName) {//调用跨服务器上传文件的工具类方法上传文件FileInfo result = null;try {result = JesyFileUploadUtil.uploadFile(reqeust, fileName, PIC_URL);} catch (IOException e) {e.printStackTrace();}return result;}
}

五、BootApplication启动类

package demo.upload;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication
public class UploadBootApplication {public static void main(String[] args) {SpringApplication.run(UploadBootApplication.class, args);}
}

七、模拟文件服务器并且配置

7.1、创建一个web项目，并且修改Tomcat服务器模拟文件服务器

创建一个项目，图片服务器项目，图片服务器和上传图片的项目端口不一致。

7.2、修改文件服务器上传权限

 7.3、允许跨域请求

在web.xml中找到下面这行代码，并在其下方添加如下代码段：

<!-- The mapping for the HTTP header security Filter -->

<!-- The mapping for the HTTP header security Filter -->
<filter><filter-name>CorsFilter</filter-name><filter-class>org.apache.catalina.filters.CorsFilter</filter-class><init-param><param-name>cors.allowed.origins</param-name><param-value>*</param-value></init-param>
</filter>
<filter-mapping><filter-name>CorsFilter</filter-name><url-pattern>/*</url-pattern>
</filter-mapping>

七、源代码

https://download.csdn.net/download/qzc70919700/30503692