浅谈struts1 & jquery form 文件异步上传
时间：2021-02-09 14:34:52|栏目：jquery|点击： 次
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
