struts2 ajax jquery 实现 export/download 文件
前提， 用struts-jquery-grid 生成的表单，然后导出所选的记录。
第一部分（jsp）
<script type="text/javascript">$.subscribe('beforeLink', function(event,data) {var fData =$('#gridmultitable').jqGrid('getGridParam','selarrrow');$('#select').attr('value',fData);});</script></head><title>Users</title></head><body>.......中间漏去了 表单部分<sjg:gridColumn name="id" index="id" title="ID" hidden="true"/></sjg:grid><br/></div><s:form id="download" action="download" ><div id="text"><s:hidden id="select" label="SelectIds" name="selectIds" value="wiow"/></div></s:form><div name="code"><!-- download simple--><action name="download" type="stream"><param name="contentType">application/octet-stream;charset=ISO8859-1</param><param name="inputName">inputStream</param><param name="contentDisposition">attachment;filename="struts2.txt"</param><param name="bufferSize">4096</param></result></action> 第三部分 action
packagecom.XXX;importjava.io.ByteArrayInputStream;importjava.io.InputStream;importjava.util.ArrayList;importjava.util.Collection;importjava.util.List;importjava.util.Map; importorg.apache.commons.collections.CollectionUtils;importorg.apache.struts2.interceptor.SessionAware;importcom.opensymphony.xwork2.Action;importcom.opensymphony.xwork2.ActionSupport;importcom.XXX.WebUserPageBean;publicclass FileDownloadAction extends ActionSupport implements Action, SessionAware{/****/private static final long serialVersionUID = 1L;private Map<String, Object> session;private String selectIds ;private InputStream inputStream;public InputStream getInputStream() throws Exception {return inputStream;}public String execute() throws Exception {List<WebUserPageBean> li=(List)session.get("mylist");List<WebUserPageBean> reli=new ArrayList<WebUserPageBean>();WebUserPageBean webuserTemp;StringBuffer exportdata=new StringBuffer();if (this.selectIds!=null && !this.selectIds.trim().equals("")) {String [] str=selectIds.split(",");for (int i = 0; i < str.length; i++ ){for (int j = 0; j< li.size() ; j++){webuserTemp= (WebUserPageBean) li.get(j);String id=webuserTemp.getId();if (str[i].trim().equalsIgnoreCase(id)){reli.add(webuserTemp);break;}}}// instead of doing the CSV transformation here, we can declare a custom CvsTransfermer@SuppressWarnings("unchecked")Collection<String> csvRows = CollectionUtils.collect(reli,new CvsTransfermer());for(String s : csvRows) {exportdata.append(s);}}inputStream = new ByteArrayInputStream(exportdata.toString().getBytes());return SUCCESS;}public void setSession(Map<String, Object> session){this.session = session;}public void setSelectIds(String selectIds){this.selectIds=selectIds;}public String getSelectIds(){return this.selectIds;}}好了。
注意的是， sj:submit 标签必须targets 不为空。 所以必须用sj:a