通过Spring反射机制,实现通用的Excel导出类
Struts2.xml
<!-- 基本资料设置 --> <package name="exportExcel" namespace="/exportExcel" extends="default"> <!-- 附件信息 --> <default-class-ref class="com.microcredit.common.action.ExportExcelAction"> </default-class-ref> <!-- 查询导出Excel列配置表--> <action name="getColumnsByPage" method="getColumnsByPage"> <result type="json"> <param name="root">pageVo</param> </result> </action> <!-- 导出Excel--> <action name="getDownloadExcel" method="getDownloadExcel"> <result name="excel" type="stream"> <param name="contentType">application/vnd.ms-excel</param> <param name="inputName">inputStreamExcel</param> <param name="contentDisposition">attachment;filename="${fileName}"</param> <param name="bufferSize">1024</param> </result> </action> </package>
导出Excel的工具Jsp
exportexcel.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>导出excel</title> <script type="text/javascript"> $(function(){ $("#open_win_excelGrid").click(function(){ $("#win_excelGrid").window('open'); $("#win_excelGrid").window('center'); //加载excel导出datagrid $("#excelGrid").datagrid({ url:ctx + '/exportExcel/getColumnsByPage.do?MODELNAME=' + $("#MODELNAME").val(),//提供模块名 pagination:true, idField:'REFCODE', loadMsg:'加载中...', singleSelect:false, fitColumns:true, striped:false, border:false, fit:true, pageSize:10, pageList:[10,15,20], columns:[[ {checkbox:true,field:'check', width:100}, {title:'列名称',field:'COLNAME', width:120, align:'center'} ]] }); }); //下载Excel $("#downloadExcel").click(function(){ var serviceName = $("#SERVICENAME").val(); var methodName = $("#METHODNAME").val(); var MODELNAME = $("#MODELNAME").val(); var excelName = $("#EXCELNAME").val(); var sheetName = $("#SHEETNAME").val(); var title = $("#TITLE").val(); var seledGrid = $('#excelGrid').datagrid('getSelections'); if(seledGrid.length > 0){ var refcodeParams = new Array(); for (i = 0; i < seledGrid.length; i++) { refcodeParams[i] = seledGrid[i].REFCODE; }; var url = "/exportExcel/getDownloadExcel.do?1=1"; url += "&serviceName=" + serviceName,//bean名 url += "&methodName=" + methodName,//方法名 url += "&MODELNAME=" + MODELNAME,//模块名 url += "&excelName=" + excelName; url += "&sheetName=" + sheetName; url += "&title=" + title; url += "&refcodeParams[]=" + refcodeParams; url += "&queryParams=" + JSON.stringify(queryParams); var form=$("<form>");//定义一个form表单 form.attr("style","display:none"); form.attr("target",""); form.attr("method","post"); form.attr("action",ctx + url); $("body").append(form);//将表单放置在web中 form.submit(); $(".btnExcelBack").click(); } else { $.messager.alert('提示','请选择要下载的列!','info'); return false; } }); $(".btnExcelBack").click(function(){ $("#win_excelGrid").window('close'); $('#excelGrid').datagrid('clearSelections'); }); }); </script> </head> <body> <div id="win_excelGrid" class="easyui-window" title="导出Excel" style="width:480px;height:385px" data-options="modal:true,closed:true,resizable:false"> <div id="cc" class="easyui-layout" fit="true"> <div data-options="region:'center'" style="padding:2px;background:#eee;"> <table id="excelGrid" toolbar='#northPanel'></table> </div> <div data-options="region:'south'" style="padding:3px;background:#eee;height:35px"> <div align="center"> <a id="downloadExcel" href="javascript:void(0)" class="easyui-linkbutton" data-options="iconCls:'icon-ok'" style="width: 80px">下载</a> <a href="javascript:void(0)" class="easyui-linkbutton btnExcelBack" data-options="iconCls:'icon-undo'" style="width: 80px">返回</a> </div> </div> </div> </div> </body> </html>
报表页面需要引入 Excel导出工具Jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="s" uri="/struts-tags"%> <%@include file="/common/in.jsp"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>贷后查询</title> </head> <body> <table id="qryDataGrid"></table> <div id="qyNorthPanel"> <div align='center'> <a id="btnQuery" href="javascript:void(0)" style="width: 80px" class="easyui-linkbutton" data-options="iconCls:'icon-search'">查询</a> <span class="btnSplit"></span> <a id="open_win_excelGrid" href="javascript:void(0)" style="width: 100px" class="easyui-linkbutton" data-options="iconCls:'icon-print'">导出Excel</a> <span class="btnSplit"></span> </div> </div> <input type="hidden" id="SERVICENAME" value="loanQryInfoService" /> <input type="hidden" id="METHODNAME" value="getLoanQryByPage" /> <input type="hidden" id="MODELNAME" value="LOANFQRY" /> <input type="hidden" id="EXCELNAME" value="贷后查询Excel" /> <input type="hidden" id="SHEETNAME" value="贷后查询" /> <input type="hidden" id="TITLE" value="贷后查询" /> <%@include file="/common/exportexcel.jsp"%> </body> </html>
ExportExcelAction.java package com.microcredit.common.action; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.InputStream; import java.util.ArrayList; import java.util.List; import java.util.Map; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import com.microcredit.basicdata.entity.BPSAEXLM; import com.microcredit.common.service.ExportExcelService; import com.microcredit.common.util.ExcelUtil; import com.microcredit.system.SpringUtils; import com.microcredit.system.exception.MsException; import com.microcredit.utils.CheckClass; public class ExportExcelAction extends BaseAction { private static final long serialVersionUID = 4383815022290991861L; private static final Log log = LogFactory.getLog(ExportExcelAction.class); private SpringUtils springUtils; private InputStream inputStreamExcel; private String fileName; //注入相应的service private ExportExcelService exportExcelService; public String getColumnsByPage(){ try { pageVo = this.exportExcelService.getExportExcelByPage(getRequestMap()); } catch (Exception e) { log.error(e.getMessage(),e); this.getOpearteFailException(e); } return SUCCESS; } /** * 导出Excel列表 * @return */ public String getDownloadExcel(){ //获取Excel名、页眉、标题 String excelName = ExcelUtil.charGBK2Utf8(CheckClass.chcString(getRequestMap().get("excelName"))); String sheetName = ExcelUtil.charGBK2Utf8(CheckClass.chcString(getRequestMap().get("sheetName"))); String title = ExcelUtil.charGBK2Utf8(CheckClass.chcString(getRequestMap().get("title"))); //获取数据 List<Map<String,Object>> dataList = new ArrayList<Map<String,Object>>(); try { this.getRequestMap().put("userId", this.getCurrentUser().getUSERID()); dataList = this.exportExcelService.getDownExportExcelData(getRequestMap()); } catch (Exception e1) { e1.printStackTrace(); } //获取列表数据 try { pageVo = this.exportExcelService.getExportExcelByPage(getRequestMap()); } catch (Exception e) { log.error(e.getMessage(),e); this.getOpearteFailException(e); } List<BPSAEXLM> BPSAEXLMList = pageVo.getRows();//---没有对应实体 try { ByteArrayOutputStream os = new ByteArrayOutputStream(); ExcelUtil.createWorkBook(sheetName, title, dataList, BPSAEXLMList).write(os); byte[] content = os.toByteArray(); String fileNameTemp = excelName + ".xls"; fileName = ExcelUtil.charGB23122GBK(fileNameTemp); inputStreamExcel = new ByteArrayInputStream(content); os.flush(); os.close(); } catch (Exception e) { throw new MsException("0",new String[]{"导出Eecel异常!"},null,null); } finally { return "excel"; } } public ExportExcelService getExportExcelService() { return exportExcelService; } public void setExportExcelService(ExportExcelService exportExcelService) { this.exportExcelService = exportExcelService; } public InputStream getInputStreamExcel() { return inputStreamExcel; } public void setInputStreamExcel(InputStream inputStreamExcel) { this.inputStreamExcel = inputStreamExcel; } public String getFileName() { return fileName; } public void setFileName(String fileName) { this.fileName = fileName; } public SpringUtils getSpringUtils() { return springUtils; } public void setSpringUtils(SpringUtils springUtils) { this.springUtils = springUtils; } }
ExportExcelService.java package com.microcredit.common.service; import java.lang.reflect.Method; import java.util.List; import java.util.Map; import net.sf.json.JSONObject; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.beans.factory.BeanFactoryAware; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.cglib.core.ReflectUtils; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import com.microcredit.common.dao.ExportExcelDao; import com.microcredit.common.util.ExcelUtil; import com.microcredit.common.vo.PageVo; import com.microcredit.system.SpringUtils; import com.microcredit.utils.CheckClass; @Service("exportExcelService") @Transactional(readOnly = true) public class ExportExcelService extends BaseService { private static final Log log = LogFactory.getLog(ExportExcelService.class); @Autowired @Qualifier("exportExcelDao") private ExportExcelDao exportExcelDao; @Autowired @Qualifier("springUtils") private SpringUtils springUtils; public PageVo getExportExcelByPage(Map map) throws Exception{ return this.exportExcelDao.getExportExcelByPage(map); } public List<Map<String,Object>> getDownExportExcelData(Map map) throws Exception{ String serviceName = CheckClass.chcString(map.get("serviceName")); String methodName = CheckClass.chcString(map.get("methodName")); String queryParams = ExcelUtil.charGBK2Utf8(CheckClass.chcString(map.get("queryParams"))); String userId = CheckClass.chcString(map.get("userId")); //通过SpringUtils获取,对应的bean对象 Object infoService = springUtils.beanFactory.getBean(serviceName); //通过bean对象创建的service,和已知的方法名,来获取方法对象 Method method = ReflectUtils.findDeclaredMethod(infoService.getClass(),methodName, new Class[]{Map.class}); Map queryMap = (Map)JSONObject.fromObject(queryParams); queryMap.put("userId", userId); //执行方法,将创建的service对象,以及方法所需参数传进去 Object obj = method.invoke(infoService, queryMap); PageVo pageVo = new PageVo(); if(obj instanceof PageVo){ pageVo = (PageVo) obj; } List<Map<String,Object>> dataList = ExcelUtil.transListBean2Map(pageVo.getRows()); return dataList; } // public Object getDownExportExcelData(Map map) throws Exception{ // String serviceName = CheckClass.chcString(map.get("serviceName")); // String methodName = CheckClass.chcString(map.get("methodName")); // String queryParams = CheckClass.chcString(map.get("queryParams")); // Object infoService = springUtils.beanFactory.getBean(serviceName); // // //查询条件需要带入分页的参数 // // Method method = ReflectUtils.findDeclaredMethod(infoService.getClass(),methodName, new Class[]{Map.class}); // Map queryMap = (Map)JSONObject.fromObject(queryParams); // Object obj = method.invoke(infoService, queryMap); // List list = new ArrayList(); // if(obj instanceof PageVo){ // //使用分页查询,需要循环查询分页,每页查询出来的结果拼接到一个List中, // PageVo pageVo = (PageVo) obj; // new BigDecimal(pageVo.getTotal()).divideAndRemainder(new BigDecimal(pageVo.getRows().size())); // } else if(obj instanceof List){ // // } //} }
ExportExcelDaoImpl.java package com.microcredit.common.dao.impl; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.commons.lang3.math.NumberUtils; import org.springframework.stereotype.Repository; import com.microcredit.basicdata.entity.BPSAEXLM; import com.microcredit.common.dao.ExportExcelDao; import com.microcredit.common.vo.PageVo; import com.microcredit.utils.CheckClass; @Repository("exportExcelDao") public class ExportExcelDaoImpl extends BaseDaoImpl implements ExportExcelDao { @Override public PageVo getExportExcelByPage(Map map) throws Exception{ StringBuffer selectSql = new StringBuffer(); StringBuffer pageSql = new StringBuffer(); StringBuffer whereSql = new StringBuffer(); Map params = new HashMap(); String MODELNAME = CheckClass.chcString(map.get("MODELNAME")); String refcodeParams = CheckClass.chcString(map.get("refcodeParams[]")); List<String> REFCODE_list = new ArrayList<String>(); if(!CheckClass.isBlank(refcodeParams)){ String[] REFCODE = refcodeParams.split(","); for (int i = 0; i < REFCODE.length; i++) { REFCODE_list.add(REFCODE[i]); } } selectSql.append(" select t.* "); pageSql.append( "from BPSAEXLM t "); whereSql.append(" where 1=1 and t.enable = 'Y' "); if(!CheckClass.isBlank(MODELNAME)){ whereSql.append(" and t.MODELNAME = :MODELNAME"); params.put("MODELNAME", MODELNAME); } if(REFCODE_list.size() > 0){ whereSql.append(" and t.REFCODE in (:REFCODE_list)"); params.put("REFCODE_list", REFCODE_list); } int page = NumberUtils.toInt((String)map.get("page")); int rows = NumberUtils.toInt((String)map.get("rows")); int start = (page-1)*rows; PageVo pageVo = new PageVo(); List rowsList = this.queryEntitesByPageForSql(start, rows,selectSql.append(pageSql).append(whereSql).append(" order by t.REMARK asc ").toString(), params,BPSAEXLM.class); int total = this.getEntitiesCountForSql(pageSql.append(whereSql).toString(), params); pageVo.setTotal(total); pageVo.setRows(rowsList); return pageVo; } }
导出列表的建表语句 -- Create table create table BPSAEXLM ( refcode NUMBER(10) default 0 not null, modelname NVARCHAR2(100) not null, colname NVARCHAR2(100) not null, colcode NVARCHAR2(100) not null, coltype NVARCHAR2(100), colfarmat NVARCHAR2(100), enable CHAR(1), remark NVARCHAR2(200), lastmoduser NVARCHAR2(20), lastmoddate DATE ) tablespace HEAD pctfree 10 initrans 1 maxtrans 255 storage ( initial 64K next 1M minextents 1 maxextents unlimited ); -- Create/Recreate primary, unique and foreign key constraints alter table BPSAEXLM add constraint PK_BPSAEXLM primary key (REFCODE) using index tablespace HEAD pctfree 10 initrans 2 maxtrans 255 storage ( initial 64K next 1M minextents 1 maxextents unlimited );
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