Java返回文件流给前端_本地文件转成流给前端

import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
 
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
 
@RestController
@RequestMapping("/downLoad")
@Slf4j
public class DemoController {
    
    @PostMapping("/file")
    public static void downLoadFile(HttpServletResponse response){
        String filePath="E:\\羊肉产品.zip";
        ServletOutputStream out = null;
        FileInputStream in = null;
        try {
            in = new FileInputStream(new File(filePath));
            String[] dir = filePath.split("/");
            String fileName = dir[dir.length-1];
            String[] array = fileName.split("[.]");