jquery之ajaxfileupload异步上传插件

点我下载工程代码

由于项目需求，在处理文件上传时需要使用到文件的异步上传。这里使用JqueryAjaxFileUploader这个组件下载地址：http://www.phpletter.com/download_project_version.php?version_id=6

服务器端采用struts2来处理文件上传。

所需环境：

jquery.js

ajaxfileupload.js

struts2所依赖的jar包

及struts2-json-plugin-2.1.8.1.jar

package com.ajaxfile.action;

importjava.io.File;

importjava.io.FileInputStream;

importjava.io.FileOutputStream;

importorg.apache.struts2.ServletActionContext;

importcom.opensymphony.xwork2.ActionSupport;

@SuppressWarnings("serial")

publicclassFileActionextendsActionSupport{

privateFilefile;

privateStringfileFileName;

privateStringfileFileContentType;

privateStringmessage="你已成功上传文件";

publicStringgetMessage(){

returnmessage;

}

publicvoidsetMessage(Stringmessage){

this.message=message;

}

publicFilegetFile(){

returnfile;

}

publicvoidsetFile(Filefile){

this.file=file;

}

publicStringgetFileFileName(){

returnfileFileName;

}

publicvoidsetFileFileName(StringfileFileName){

this.fileFileName=fileFileName;

}

publicStringgetFileFileContentType(){

returnfileFileContentType;

}

publicvoidsetFileFileContentType(StringfileFileContentType){

this.fileFileContentType=fileFileContentType;

}

@SuppressWarnings("deprecation")

@Override

publicStringexecute()throwsException{

Stringpath=ServletActionContext.getRequest().getRealPath("/upload");

try{

Filef=this.getFile();

if(this.getFileFileName().endsWith(".exe")){

message="对不起,你上传的文件格式不允许!!!";

returnERROR;

}

FileInputStreaminputStream=newFileInputStream(f);

FileOutputStreamoutputStream=newFileOutputStream(path+"/"+this.getFileFileName());

byte[]buf=newbyte[1024];

intlength=0;

while((length=inputStream.read(buf))!=-1){

outputStream.write(buf,0,length);

}

inputStream.close();

outputStream.flush();

}catch(Exceptione){

e.printStackTrace();

message="对不起,文件上传失败了!!!!";

}

returnSUCCESS;

}

}

struts.xml

<?xmlversion="1.0"encoding="UTF-8"?>

<!DOCTYPEstrutsPUBLIC"-//ApacheSoftwareFoundation//DTDStrutsConfiguration2.1//EN""http://struts.apache.org/dtds/struts-2.1.dtd">

<struts>

<packagename="struts2"extends="json-default">

<actionname="fileUploadAction"class="com.ajaxfile.action.FileAction">

<resulttype="json"name="success">

<paramname="contentType">

text/html

</param>

</result>

<resulttype="json"name="error">

<paramname="contentType">

text/html

</param>

</result>

</action>

</package>

</struts>

contentType参数是一定要有的，否则浏览器总是提示将返回的JSON结果另存为文件，不会交给ajaxfileupload处理。这是因为struts2 JSON Plugin默认的contentType为application/json，而ajaxfileupload则要求为text/html。