SSH2下使用ajaxFileUpload控件上传附件

使用jQuery的ajaxFileUpload控件以ajax方式上传附件有较好的用户体验，在某SSH2项目开发中，使用了ajaxFileUpload实现了附件的上传，具体过程如下：

1、引入及修改ajaxFileUpload.js

<script type="text/javascript" src="<%=basePath%>/js/jquery/jquery-1.8.0.min.js"></script><script type="text/javascript" src="<%=basePath%>js/ajaxfileupload.js"></script> 

为了使得ajaxfileupload支持IE9、IE10，在ajaxfileupload.js中修改createUploadIframe方法（可参考http://blog.csdn.net/tiangsu_php/article/details/7795927）

 createUploadIframe: function(id, uri){//create frame            var frameId = 'jUploadFrame' + id;                    if(window.ActiveXObject) {                 if(jQuery.browser.version=="9.0"||jQuery.browser.version=="10.0") {                     io = document.createElement('iframe');                     io.id = frameId;                     io.name = frameId;                 } else if(jQuery.browser.version=="6.0"||jQuery.browser.version=="7.0"||jQuery.browser.version=="8.0") {                     var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');                     if(typeof uri== 'boolean'){                         io.src = 'javascript:false';                     }                     else if(typeof uri== 'string'){                         io.src = uri;                     }                    } } 

2、form表单及上传控件

form表单设置为：

enctype="multipart/form-data" id="addForm" method="post"

上传控件代码为：

<input id="upload" name="upload" size="50"type="file"  />  <a class="easyui-linkbutton" iconCls="icon-upload" onclick="ajaxFileUploadCheckType('/sys/file/uploadSysFile.action?fileVo.status=0')" >上传</a> <img src="<%=basePath%>/img/loading_16x16.gif" id="loading"    style="display: none;">                         

上传的脚本代码为：

function ajaxFileUploadCheckType(url){ var str=""; var re=new RegExp("(.pdf|.PDF)$");         var upload=$("#upload").val();     if(upload=="")              str+="请选择要上传的附件！<br/>";          else if(!re.test(upload.toLowerCase()))       str+="请上传PDF格式的文件！！";     if(str=="")        ajaxFileUpload(url);  else        alert(str);     }        //文件上传        function ajaxFileUpload(url1)            {              $("#loading")                .ajaxStart(function(){                    $(this).show();                })//开始上传文件时显示一个等待图片                .ajaxComplete(function(){                        $(this).hide();                });//文件上传完成将图片隐藏起来                var fileSelect=$("#fileSelect").val(); //是否选择了文件类型                var url2=url1;                if(fileSelect!=undefined&&fileSelect!=null&&fileSelect!=''){                if(url1.indexOf('?')>0)                  url2=encodeURI(url1+"&fileVo.fileTypeId="+fileSelect);                else                  url2=encodeURI(url1+"?fileVo.fileTypeId="+fileSelect);                  }                 var tableName=$("#tableName").val();                     if(url2.indexOf('?')>0)                     url2=encodeURI(url2+"&fileVo.tableName="+tableName);                else                    url2=encodeURI(url2+"?fileVo.tableName="+tableName);                var fid=$("#fid").val();                if(url2.indexOf('?')>0)                     url2=encodeURI(url2+"&fileVo.fid="+fid);                else                      url2=encodeURI(url2+"?fileVo.fid="+fid);                              $.ajaxFileUpload                   (                                         {                                 url:url2,//用于文件上传的服务器端请求地址                             secureuri:false,//一般设置为false                        fileElementId:'upload',//文件上传空间的id属性  <input type="file" id="upload" name="upload" />                                              // type:'POST',                          dataType: 'text',//返回值类型 一般设置为json                             //contentType: "application/x-www-form-urlencoded; charset=utf-8",                        success: function (data, status)  //服务器成功响应处理函数                        {                                                             //alert((data));                                           var result=eval('('+data+')');                                  generateFileList(result,"type"); //使用ajax方式重新长生附件列表                                                                                                               },                        error: function (data, status, e)//服务器响应失败处理函数                        {                                  $.messager.alert('错误提示',"文件上传出现异常，请重新上传或联系管理员！","error");                        }                    }                )                            return false;            }      

 3、Struts2的XML配置及服务器端处理

XML配置：

        <package name="sys.file" namespace="/sys/file" extends="globalpackage"><action name="uploadSysFile" class="com.cnpc.sys.action.FileUploadAction"method="uploadSysFile"></action>         ……

服务器端Action处理：

package com.cnpc.sys.action;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.util.ArrayList;import java.util.Date;import java.util.List;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.struts2.ServletActionContext;import com.cnpc.framework.common.action.BaseAction;import com.cnpc.framework.common.exception.GlobalException;import com.cnpc.framework.common.servicefactory.SystemInstance;import com.cnpc.sys.entity.Dictionary;import com.cnpc.sys.entity.Employee;import com.cnpc.sys.service.IDictionaryService;import com.cnpc.sys.service.IEmployeeService;import com.cnpc.sys.service.ISysFileService;import com.cnpc.sys.vo.SysFileVo;import com.cnpc.utils.DateUtils;import com.cnpc.utils.PropertiesTools;import com.cnpc.utils.StrUtils;//附件上传处理类public class FileUploadAction extends BaseAction {private ISysFileService sysFileService = (ISysFileService) SystemInstance.getInstance().getBean(ISysFileService.class);private IDictionaryService dictionaryService = (IDictionaryService) SystemInstance.getInstance().getBean(IDictionaryService.class);private IEmployeeService employeeService = (IEmployeeService) SystemInstance.getInstance().getBean(IEmployeeService.class);private SysFileVo fileVo;private File upload;// 实际上传文件private String uploadContentType; // 文件的内容类型private String uploadFileName; // 上传文件名private List<SysFileVo> fileVoList;private String message = "你已成功上传文件";private String tableName;private String year;private List<SysFileVo> volist;public String getYear() {return year;}public void setYear(String year) {this.year = year;}public String getTableName() {return tableName;}public void setTableName(String tableName) {this.tableName = tableName;}public List<SysFileVo> getVolist() {return volist;}public void setVolist(List<SysFileVo> volist) {this.volist = volist;}public SysFileVo getFileVo() {return fileVo;}public void setFileVo(SysFileVo fileVo) {this.fileVo = fileVo;}public File getUpload() {return upload;}public void setUpload(File upload) {this.upload = upload;}public String getUploadContentType() {return uploadContentType;}public void setUploadContentType(String uploadContentType) {this.uploadContentType = uploadContentType;}public String getUploadFileName() {return uploadFileName;}public void setUploadFileName(String uploadFileName) {this.uploadFileName = uploadFileName;}public List<SysFileVo> getFileVoList() {return fileVoList;}public void setFileVoList(List<SysFileVo> fileVoList) {this.fileVoList = fileVoList;}public String getMessage() {return message;}public void setMessage(String message) {this.message = message;}public String uploadSysFile() throws GlobalException, IOException {String isAll=fileVo.getIsAll();Employee emp = employeeService.getEmployeeByID(getSessionContainer().getUserId());if (fileVo == null) {  fileVo = new SysFileVo();   }     String[] str = saveUpload();fileVo.setFileName(str[0]);fileVo.setVirtualName(str[1]);fileVo.setFilePath(str[2].replace("\\", "\\\\"));if (fileVo != null) {if (fileVo.getEmpid() == null) {       Integer empid = emp.getEmpid();fileVo.setEmpid(empid);}if (fileVo.getUploadTime() == null) {fileVo.setUploadTime(DateUtils.format(new Date(System.currentTimeMillis()), DateUtils.formatStr_yyyyMMdd));}if (fileVo.getTableName() == null) {fileVo.setTableName(tableName);}if(fileVo.getYear()==null){if(year==null)year=DateUtils.getYear();   fileVo.setYear(year);}if(fileVo.getIid()==null){fileVo.setIid(emp.getInstitute().getIid()); }fileVo = sysFileService.addSysFileVo(fileVo);}if (fileVoList == null) {fileVoList = new ArrayList<SysFileVo>();}     fileVo.setIsAll(isAll);if(fileVo.getIsAll()!=null&&fileVo.getIsAll().equals("1")){fileVoList = sysFileService.getAllSysFileByInfoId(fileVo.getTableName(), fileVo.getFid()); }else{fileVoList = sysFileService.getSysFileByInfoId(fileVo.getTableName(),null, fileVo.getFid(),fileVo.getStatus()); }String jsonStr = getJsonForFileList(fileVoList);HttpServletResponse response = getCurrentResponse();HttpServletRequest request=getCurrentRequest();request.setCharacterEncoding(ENCODING);response.setCharacterEncoding(ENCODING);response.setContentType("text/html");  outPutString(jsonStr);         return NONE;  }public String getJsonForFileList(List<SysFileVo> filelist) {if (filelist == null)return "[]";StringBuffer buffer = new StringBuffer("[");for (SysFileVo vo : filelist) {buffer.append("{'id':'" + vo.getFileId() + "' ,'name':'"+ vo.getFileName() + "','path':'"+ vo.getFilePath().replace("\\", "\\\\") + "','typeName':'"+ vo.getFileTypeName() + "','typeid':'"+ vo.getFileTypeId() + "','status':'"+ vo.getStatus() + "'},");         }if (buffer.length() > 1)buffer = new StringBuffer(buffer.substring(0, buffer.length() - 1));buffer.append("]");  return buffer.toString();}@SuppressWarnings("deprecation")public String[] saveUpload() throws IOException {String[] result = new String[3];try {if (uploadFileName != null && !"".equals(uploadFileName)) {String trueName = uploadFileName.substring(uploadFileName.lastIndexOf("/") + 1, uploadFileName.length());String fileName = new Date().getTime()+ com.cnpc.utils.FileUtils.getExtention(uploadFileName);String path = PropertiesTools.getPropertiesValueByFileAndKey("globalParameters.properties", "uploadPath");String targetDirectory = path;String targetFileName = fileName;// 以服务器的文件保存地址和原文件名建立上传文件输出流FileOutputStream fos = new FileOutputStream(path + "\\"+ fileName);// 以上传文件建立一个文件上传流FileInputStream fis = new FileInputStream(upload);// 将上传文件的内容写入服务器byte[] buffer = new byte[1024];int len = 0;while ((len = fis.read(buffer)) > 0) {fos.write(buffer, 0, len);}fis.close();fos.flush();result[0] = trueName;result[1] = fileName;result[2] = path + "\\" + fileName;}} catch (Exception e) {e.printStackTrace();message = "对不起,文件上传失败了!!!!";}return result;}public String deleteSysFile() throws GlobalException, IOException {if (fileVo != null && fileVo.getFileId() != null) {SysFileVo deleteVo = sysFileService.getSysFileByID(fileVo.getFileId());deleteFile(deleteVo.getFilePath());      sysFileService.deleteSysFileByVoId(deleteVo.getFileId());if (fileVoList == null) {    fileVoList = new ArrayList<SysFileVo>();}if(fileVo.getIsAll()!=null&&fileVo.getIsAll().equals("1")){fileVoList = sysFileService.getAllSysFileByInfoId(    deleteVo.getTableName(), deleteVo.getFid());    }else{          fileVoList = sysFileService.getSysFileByInfoId(deleteVo.getTableName(),null, deleteVo.getFid(),deleteVo.getStatus()); }}String jsonStr = getJsonForFileList(fileVoList);HttpServletResponse response = getCurrentResponse();HttpServletRequest request=getCurrentRequest();request.setCharacterEncoding(ENCODING);response.setCharacterEncoding(ENCODING);response.setContentType("text/html");  outPutString(jsonStr);return NONE;}public String downloadFile() throws Exception {SysFileVo filevo = sysFileService.getsysfilebypath(fileVo.getFilePath());HttpServletResponse response = getCurrentResponse();HttpServletRequest request=getCurrentRequest();request.setCharacterEncoding(ENCODING);response.setCharacterEncoding(ENCODING);   response.setContentType("text/html");  if (filevo != null) {setCurrentAttribute("filename", filevo.getFileName());setCurrentAttribute("fileurl", filevo.getFilePath());} else {setCurrentAttribute("filename", fileVo.getFileName());setCurrentAttribute("fileurl", fileVo.getFilePath());}return "download";}public void deleteFile(String path) {String targetDirectory = ServletActionContext.getRequest().getRealPath("");File target = new File(targetDirectory, path);if (target.exists()) {target.delete();} else {System.out.println("文件不存在");}}public String ajaxCheckFile() throws IOException {String typeids = getCurrentParameter("typeids");String dictCode = getCurrentParameter("dictCode");// List<SysFileVo> filelist=sysFileService.getSysFileByInfoId(tabName,// Integer.valueOf(id));String[] arrType = null;if (!StrUtils.isEmpty(typeids))arrType = typeids.substring(0, typeids.length() - 1).split(",");List<Dictionary> dictlist = dictionaryService.getDictsByDictCode(dictCode);String str = "";boolean isExist = false;for (Dictionary dict : dictlist) {isExist = false;if (dict.getIsCheck() != null && dict.getIsCheck().equals("1")) {if (arrType != null) {for (String typeid : arrType) {if (dict.getDictid().equals(Integer.valueOf(typeid))) {isExist = true;break;}      }}if (!isExist)str += dict.getDictName() + "不能为空！\r\n";}}outPutString(str);return NONE;}}

FileUploadAction包含了附件上传、删除、生成json附件列表功能，该处理类是直接复制、粘贴项目源代码而来，如果使用，请按照需求进行增删。

以上三个步骤就在SSH2中完成了ajaxFileUpload控件上传附件的功能，仅供参考。