package com.zyy.springmvc.controller;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import javax.servlet.http.HttpServletResponse;
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.RequestPart;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import com.zyy.springmvc.model.ResultVo;
@Controller
@RequestMapping("file")
public class FileUploadController {
@RequestMapping(value = "/pdf", method = RequestMethod.GET)
public void upload(HttpServletResponse response) throws IOException {
byte[] buf = getBytes();
// 将byte数组写到response里面
response.getOutputStream().write(buf, 0, buf.length);
}
private byte[] getBytes() throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try (FileInputStream in = new FileInputStream(new File("C:\\Users\\wild\\Desktop\\pdf\\aaa.pdf"))) {
int len;
byte[] b = new byte[1024];
while ((len=in.read(b)) != -1) {
bos.write(b, 0, len);
}
}
return bos.toByteArray();
}
}
