第一部分 文件上传
一、新建项目
二、配置maven
4.0.0
org.springframework.boot
spring-boot-starter-parent
2.1.2.RELEASE
qiu
fileupload
0.0.1-SNAPSHOT
fileupload
Demo project for Spring Boot
1.8
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-devtools
runtime
org.springframework.boot
spring-boot-starter-test
test
org.springframework.boot
spring-boot-maven-plugin
三、SpringBoot配置文件application.properties
server.port=6555
# 上传文件总的大值
spring.servlet.multipart.max-request-size=10MB
# 单个文件的大值
spring.servlet.multipart.max-file-size=10MB
## jsp
#spring.mvc.view.prefix=/WEB-INF/jsp/
#spring.mvc.view.suffix=.jsp
spring.mvc.static-path-pattern=/**
四、前端页面
前端页面放于resources目录下面的public目录中，springboot会默认加载这个目录。
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文件上传
五、controller
package qiu.fileupload.test;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import java.io.File;
import java.io.IOException;
@Controller
public class GetFile {
@GetMapping("/upload")
public String upload() {
return "upload";
}
@PostMapping("/upload")
@ResponseBody
public String upload(@RequestParam("file") MultipartFile file,@RequestParam("path") String path) {
if (file.isEmpty()) {
return "上传失败，请选择文件";
}
System.out.println("aaaaaaaaaaaaaaaaaaaaaaaaa");
String fileName = file.getOriginalFilename();
String filePath = path;
System.out.println(filePath);
File dest = new File(filePath + fileName);
try {
file.transferTo(dest);
return "上传成功";
} catch (IOException e) {
}
return "上传失败！";
}
}
六、测试
1、浏览器中输入地址：http://localhost:6555/register.html
2、选择“选择文件”，“开始上传”
3、到D盘D:\test\test\目录下面查看
第二部分 文件下载
一、前端页面
文件下载
文件下载列表
二、controller
package qiu.fileupload.test;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
@Controller
public class DownloadFile {
@RequestMapping(value = "/testDownload1", method = RequestMethod.GET)
public void Download1(HttpServletResponse res) {
String fileName = "1.png";
res.setHeader("content-type", "application/octet-stream");
res.setContentType("application/octet-stream");
res.setHeader("Content-Disposition", "attachment;filename=" + fileName);
byte[] buff = new byte[1024];
BufferedInputStream bis = null;
OutputStream os = null;
try {
os = res.getOutputStream();
bis = new BufferedInputStream(new FileInputStream(new File("L://test//"
+ fileName)));
int i = bis.read(buff);
while (i != -1) {
os.write(buff, 0, buff.length);
os.flush();
i = bis.read(buff);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (bis != null) {
try {
bis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
@RequestMapping(value = "/testDownload2", method = RequestMethod.GET)
public void Download2(HttpServletResponse res) {
String fileName = "Android常用英语.docx";
res.setHeader("content-type", "application/octet-stream");
res.setContentType("application/octet-stream");
res.setHeader("Content-Disposition", "attachment;filename=" + fileName);
byte[] buff = new byte[1024];
BufferedInputStream bis = null;
OutputStream os = null;
try {
os = res.getOutputStream();
bis = new BufferedInputStream(new FileInputStream(new File("L://test//"
+ fileName)));
int i = bis.read(buff);
while (i != -1) {
os.write(buff, 0, buff.length);
os.flush();
i = bis.read(buff);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (bis != null) {
try {
bis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
@RequestMapping(value = "/testDownload3", method = RequestMethod.GET)
public void Download3(HttpServletResponse res) {
String fileName = "Git-2.17.0-64-bit.exe";
res.setHeader("content-type", "application/octet-stream");
res.setContentType("application/octet-stream");
res.setHeader("Content-Disposition", "attachment;filename=" + fileName);
byte[] buff = new byte[1024];
BufferedInputStream bis = null;
OutputStream os = null;
try {
os = res.getOutputStream();
bis = new BufferedInputStream(new FileInputStream(new File("L://test//"
+ fileName)));
int i = bis.read(buff);
while (i != -1) {
os.write(buff, 0, buff.length);
os.flush();
i = bis.read(buff);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (bis != null) {
try {
bis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
@RequestMapping(value = "/testDownload4", method = RequestMethod.GET)
public void Download4(HttpServletResponse res) {
String fileName = "MyBatis源代码.zip";
res.setHeader("content-type", "application/octet-stream");
res.setContentType("application/octet-stream");
res.setHeader("Content-Disposition", "attachment;filename=" + fileName);
byte[] buff = new byte[1024];
BufferedInputStream bis = null;
OutputStream os = null;
try {
os = res.getOutputStream();
bis = new BufferedInputStream(new FileInputStream(new File("L://test//"
+ fileName)));
int i = bis.read(buff);
while (i != -1) {
os.write(buff, 0, buff.length);
os.flush();
i = bis.read(buff);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (bis != null) {
try {
bis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
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