struts1 & jquery form 文件异步上传实例分享

程序员文章站 2022-04-20 15:58:53

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本文主要为大家带来一篇浅谈struts1 & jquery form 文件异步上传。小编觉得挺不错的，现在就分享给大家，也给大家做个参考。一起跟随小编过来看看吧，希望能帮助到大家。

1.概述

还在用struts1？是的，在地球的没写地方，落后的生产方式还在运转(老项目).

从继承org.apache.struts.action.Action，继承org.apache.struts.action.ActionForm开始吧

2. 代码

2.1 html页面

<html>
<head>
<title>网页上传</title>
</head>
<body>
  <center>
    <h1>本地文件网页上传</h1>
    <hr>

  </center>

  <h1>文件信息列表</h1>
  <hr>
  <form id="myform" method="post" enctype="multipart/form-data">
    <table width="0" border="0" cellspacing="10" cellpadding="0">
    
      <tr>
        <td>选择文件：</td>
        <td><input type="file" name="uploadFile" /></td>
      </tr>
      <tr>
        <td>标题：</td>
        <td><input type="text" name="filetitle" /></td>
      </tr>

      <tr>
        <td colspan="2">
          <input type="button" id="mysubmit" value="确认上传"/>
        </td>
      </tr>

    </table>
  </form>
  <script src="script/jquery.js"></script>
  <script src="script/jquery.form.js"></script>
  <script src="script/_fileUpload.js"></script>
</body>
</html>

2.2 _fileUpload.js

/**
 *_fileUpload.js 
 *
 * 
 */
window.onload = function() {
  
  
  $("#mysubmit").bind("click", function(){
    $("#myform").ajaxSubmit({
      url: "myUpload.do",
      type: "post",
      success: function(data){
        console.log(11111111);
        console.log(data);
      },
      error: function(responseError){
        console.log(22222222222);
        console.log(responseError);
      }
      
    });
  });
}

2.3 MyUploadAction.java(继承自Action)

package com.rocky.console.action;

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;

import com.rocky.console.form.MyUploadForm;
import com.rocky.console.service.ResponseUtil;


public class MyUploadAction extends Action {

  
  public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request,
      HttpServletResponse response) throws Exception{
    
    MyUploadForm myUploadForm = (MyUploadForm) form;
    FormFile uploadFile = myUploadForm.getUploadFile();
    String filetitle = myUploadForm.getFiletitle();
    System.out.println("111111"+filetitle);
    
    int fileSize = uploadFile.getFileSize();
    InputStream inputStream = uploadFile.getInputStream();
    System.out.println("fileSize::::::::"+fileSize);
    String path = "x:";
    String filename = path + File.separator + uploadFile.getFileName();
    FileOutputStream fos = new FileOutputStream(filename);
    byte[] b = new byte[1024];
    int len = -1;
    while((len = inputStream.read(b))!=-1){
      fos.write(b, 0, len);
    }
    fos.close();
    String result = "success";
    ResponseUtil.write(response, result, null);
    return null;
    
  }
}

2.4 MyUploadForm.java( 继承自ActionForm)

package com.rocky.console.form;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;

public class MyUploadForm extends ActionForm {

  /**
   * 
   */
  private static final long serialVersionUID = 6650496540449458586L;
  
  private FormFile uploadFile = null;
  
  private String filetitle;
  
  public String getFiletitle() {
    return filetitle;
  }

  public void setFiletitle(String filetitle) {
    this.filetitle = filetitle;
  }

  public ActionErrors validate(ActionMapping mapping,
      HttpServletRequest request) {
    return null;
  }
  
  public void reset(ActionMapping mapping, HttpServletRequest request) {
  }

  public FormFile getUploadFile() {
    return uploadFile;
  }

  public void setUploadFile(FormFile uploadFile) {
    this.uploadFile = uploadFile;
  }

}

2.5 struts-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "struts-config_1_2.dtd">

<struts-config>
  <data-sources />
  <form-beans>
    <form-bean name="myUploadForm" type="com.rocky.console.form.MyUploadForm" />
  </form-beans>
  <global-exceptions />
  <global-forwards />
  <action-mappings>
    <!-- rocky myupload -->
    <action path="/myUpload" attribute="myUploadForm" name="myUploadForm" type="com.rocky.console.action.MyUploadAction" />
  </action-mappings>
  <message-resources parameter="ApplicationResources" />
</struts-config>

2.6 说明

2.6.1 jquery.form.js 网上可以下载

使用var formData = new FormData(), 然后formData.append("myfile", document.getElementById("myfile").files[0]);form.append...

当form表单field较多时写很多 append很麻烦，显然 ajaxSubmit方便很多

2.6.2 前端过来的数据通过 ActionForm 直接封装到其子类(MyActionForm)对象中 , 用FormFile接收file文件用String等接收其他类型数据

当然都是根据HTML 标签的name属性一一对应来注入的

2.6.3 ActionForm是怎么和自定义实现的bean(MyUploadForm) 对上的？

在struts-config.xml中form-bean设置自己的那个bean，通过<action path="/myUpload" attribute="myUploadForm" name="myUploadForm"

来完成这种映射

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