vue form表单post请求结合Servlet实现文件上传功能

前端测试页面代码:

<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('上传文件不能超过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>

后端servlet接收代码

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")+"/"; //定义路径

String tmpPath=JTKit.getBaseDIR()+uri;//此处为个人项目路径,根据需求定义路径

DiskFileItemFactory factory = new DiskFileItemFactory();

factory.setRepository(new File(tmpPath));//临时文件存储路径

ServletFileUpload fileUpload = new ServletFileUpload(factory);//核心操作对象

fileUpload.setHeaderEncoding("utf-8");//防乱码

try {

//此处如果要实时强行转换则需要下载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){//表示每次最多读1024个字节

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();

}

}

}

测试结果

补充:Servlet获取表单提交过来的数据

在Servlet的doPost方法:

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

}

中获取表单数据,首先,为了防止出现中文乱码问题,需要给request设置编码为“UTF-8”:

request.setCharacterEncoding("utf-8");

获取单个字符串的方式:

<pre style="font-family: 宋体; font-size: 12pt; background-color: rgb(255, 255, 255);"><span style="font-size:18px; font-family: Arial, Helvetica, sans-serif; background-color: rgb(240, 240, 240);">String username = request.getParameter("username");</span>

获取字符串数组的方式:

String[] favorites = request.getParameterValues("favorite");

以上为个人经验,希望能给大家一个参考,也希望大家多多支持。如有错误或未考虑完全的地方,望不吝赐教。

以上是 vue form表单post请求结合Servlet实现文件上传功能 的全部内容, 来源链接: utcz.com/p/219444.html

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