vue form表单post请求结合Servlet实现文件上传功能

<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>

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();
		}
 }
 
}

protected void dopost(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception {
}

request.setcharacterencoding("utf-8");

<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>

string[] favorites = request.getparametervalues("favorite");