vue實現form表單post請求結合Servlet實現文件上傳

1. 前端測試頁面代碼：

<template>
    <div>
        <input type="file" name="file" @change="change($event)">
    </div>
</template>

<script>
    export default {
        created(){
            this.path = this.$route.query;
            for (let i in this.path) {
                this[i] = decodeURIComponent(this.path[i]);
            }
        },
        methods:{
            change(ev){
                let file = ev.target.files[0];
                let size = file.size;
                let name = file.name;
                if(size > 314572800){
                    this.$message.warning('上傳文件不能超過300M');
                    return;
                }
                let formData = new FormData();
                formData.append('file',file,name)
                this.$axios.post('/JT3'+this.getddRecordDelete,formData,{
                    headers:{"Content-Type":"multipart/form-data"}
                }).then(data=>{
                    console.log(data);
                })
            }
        }
    }
</script>

<style scoped>

</style>

2. 後端servlet接收代碼

package jt3.control.zygkh;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem; 
import org.apache.commons.fileupload.FileUploadException; 
import org.apache.commons.fileupload.disk.DiskFileItemFactory; 
import org.apache.commons.fileupload.servlet.ServletFileUpload;

import jtacc.filter.JTKit;
import jtacc.jtpub.DT; 

@WebServlet(urlPatterns = "/upfile/file")  
public class UploadServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		System.out.println(11);
		this.doPost(request, response);
    }


    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    	String uri="/u/file/"+DT.getFormatDate("yyyyMMdd")+"/";  //定義路徑
    	String tmpPath=JTKit.getBaseDIR()+uri;//此處爲個人項目路徑，根據需求定義路徑
    	DiskFileItemFactory factory = new DiskFileItemFactory();
		factory.setRepository(new File(tmpPath));//臨時文件存儲路徑
		ServletFileUpload fileUpload = new ServletFileUpload(factory);//核心操作對象
		fileUpload.setHeaderEncoding("utf-8");//防亂碼
		try {
			//此處如果要實時強行轉換則需要下載jar包（commons-fileupload-1.3.3.jar）
			List<FileItem> list = fileUpload.parseRequest(request);
			for (FileItem fileItem : list) {
				InputStream in = fileItem.getInputStream();
				String filename = fileItem.getName();
				if (fileItem != null) {
					System.out.println(filename);
					int len = 0;
					byte[] array = new byte[1024];
					FileOutputStream fos = new FileOutputStream(tmpPath+filename);
					while((len = in.read(array))!=-1){//表示每次最多讀1024個字節
						fos.write(array,0,len);
						fos.flush();
					}
					fos.close();
					in.close();
					fileItem.delete();
					response.setCharacterEncoding("UTF-8");
					String realPath = uri+filename;
					response.getWriter().append(realPath);
				}
			}
		} catch (FileUploadException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    }
    

}

3. 測試結果