用SpringMvc实现Excel导出功能

Posted 凉城

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以前只知道用poi导出Excel,最近用了SpringMvc的Excel导出功能,结合jxl和poi实现,的确比只用Poi好,两种实现方式如下:

一、结合jxl实现:

1、引入jxl的所需jar包:

<dependency org="net.sourceforge.jexcelapi" name="jxl" rev="2.6.3" conf="compile->compile(*),master(*);runtime->runtime(*)" transitive="false"/>

2、接口和实现类:

  接口源码:

public interface ExportRS {
/**
     * 息导出到Excel
     * <P>
     * <ul>
     * </ul>
     * </P>
     * 
     * @return 导出文件流
     */
    @RequestMapping(value="/export/excel" , method={RequestMethod.POST,RequestMethod.GET})
    ModelAndView exportExcel(@RequestParam(value = "condition", required = true)  String condition,
            HttpServletRequest request, HttpServletResponse response);
}

实现源码:

@RestController
public class ExportRSImpl implements ExportRS {
@Override
    public ModelAndView exportExcel(String condition, 
            HttpServletRequest request, HttpServletResponse response) {
        try{
            NSearch nSearch = JsonObjUtil.JsonToObj(condition, NSearch.class);
            String userId = SecurityHelper.getCurrentUserId();
            QueryResult result = _mupport.search(nSearch, userId);
            long total = result.getTotalCount();
            //System.out.println("资产总数是:"+total);
            Map<String, Object> model = new HashMap<String, Object>();  
            model.put("total", total+"");
            model.put("filename", "资产信息-"+new SimpleDateFormat("yyyyMMddhhmmss").format(new Date())+".xls");
            model.put("items", result.getItems());
            //资产类型
            List<AssetCategoryDefine> categoryList =  _assetCatRp.findAllRestrict();
            //所有用户
            String stationId = SecurityHelper.getCurrentStationId();
            List<User> userList = _rpUser.findByStationId(stationId);
            model.put("allUser", userList);
            model.put("allCategory", categoryList);
            
            return new ModelAndView(new JExcelView(),model);
        } catch (Throwable e) {
            throw new AssetRuntimeException(e);
        }
    }
}
ExportRSImpl.java

3、JExcelView的实现ModelAndView

public class JExcelView extends AbstractJExcelView{

    private static Logger logger = LoggerFactory.getLogger(JExcelView.class);
    private OutputStream os;
    
    String[] tilte = new String[]{"序号","资产名称","资产类型","创建时间","删除人","删除时间","删除主机"};
    
    List<AssetCategoryDefine> categoryList = null;
    List<User> userList = null;
    
    
    @SuppressWarnings("unchecked")
    @Override
    protected void buildExcelDocument(Map<String, Object> model, 
            WritableWorkbook workbook, 
            HttpServletRequest request,
            HttpServletResponse response){
        os = null;  
        try {
            
            categoryList = (List<AssetCategoryDefine>)model.get("allCategory");
            userList = (List<User>)model.get("allUser");
            
            String filename = (String)model.get("filename");
            //String total = (String)model.get("total");
            //响应信息,弹出文件下载窗口
            response.setContentType("APPLICATION/OCTET-STREAM");
            response.setHeader("Content-Disposition",  "attachment; filename=" 
                            + URLEncoder.encode(filename, "UTF-8"));  
            os = response.getOutputStream();
            
            //全局设置
            WorkbookSettings settings = new WorkbookSettings();
            settings.setEncoding("UTF-8");
            settings.setLocale(new Locale("zh", "cn"));
            
            workbook =  Workbook.createWorkbook(os);
            WritableSheet sheet =  workbook.createSheet("资产信息", 0);
            
            String titleName = "资产信息";
            
            //添加标题和文件列表头
            addTitle(sheet,tilte,titleName);
            //添加文件信息
            List<MObject> list = (List<MObject>)model.get("items");
            addContextByList(sheet,list,tilte.length);
        } catch (Throwable e) {
            logger.error("资产信息导出Excel出错:"+e.getMessage());
        }finally {
            try {
                    workbook.write();
                    workbook.close();
                    os.flush();
                    os.close();
                } catch (Throwable e) {
                    logger.error("资产信息导出Excel出错:"+e.getMessage());
                }
        }
        
    }

    //添加标题和列头信息
    public void addTitle(WritableSheet sheet, String[] assettitle, String total,String titleName) throws RowsExceededException, WriteException {
        //添加标题第一行
        Label label = new Label(2, 0, titleName+"(共"+total+"条)",getHeader());
        sheet.addCell(label);
        //添加第二行
        for (int i = 0; i < tilte.length; i++) {
            label = new Label(i, 1, tilte[i]);
            sheet.addCell(label);
        }
    }
    
    //添加标题和列头信息
    public void addTitle(WritableSheet sheet, String[] assettitle,String titleName) throws RowsExceededException, WriteException {
        //添加标题第一行
                Label label = new Label(2, 0, titleName,getHeader());
                sheet.addCell(label);
                //添加第二行
                for (int i = 0; i < tilte.length; i++) {
                    label = new Label(i, 1, tilte[i]);
                    sheet.addCell(label);
                }
    }

    //添加所有文件信息 从第三行开始添加
    //{"序号","资产名称","资产类型","创建时间","删除人","删除时间","删除主机"};
    @SuppressWarnings("unchecked")
    private <T> void addContextByList(WritableSheet sheet, List<T> list, int length) throws RowsExceededException, WriteException {
        if (list!=null) {
            CellView cellView = new CellView();
            cellView.setAutosize(true);
            
            List<MObject> mObjects = (List<MObject>)list;
            //int size = mObjects.size();
            Label label = null;
            MObject mObject = null;
            String value = "";
            for (int i = 0; i < list.size(); i++) {
                for (int j = 0; j < length; j++) {
                    mObject = mObjects.get(i);
                    if(j==0){
                        label = new Label(j, i+2, i+"");
                        sheet.addCell(label);
                    }else{
                        value = getValue(mObject,j);
                        label = new Label(j, i+2, value+"");
                        sheet.addCell(label);
                        sheet.setColumnView(j, cellView);
                    }
                    
                }
            }
        }else{
            Label label = new Label(0,3,"暂无数据");
            sheet.addCell(label);
        }
    }

    //根据列名获取值,先写死,之后再想其他办法
    //{"序号","资产名称","资产类型","创建时间","删除人","删除时间","删除主机"};
    private String getValue(MObject mObject, int j) {

        switch (j) {
        case 1:
            return mObject.getName();
        case 2:
            return getAssetCategory(objectToString(mObject.getCategoryId()),null);
        case 3:
            return objectToString(mObject.getCreatedTime());
        case 4:
            return getUserInfo(objectToString(mObject.getDeletedBy()),null);
        case 5:
            return objectToString(mObject.getDeletedTime());
        case 6:
            return objectToString(mObject.getExtraData().get("delHostName"));
        default:
        }
        return null;
    }
    
    private String objectToString(Object object){
        if(object==null){
            return "";
        }else{
            if(object instanceof Date){
                DateFormat from_type = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  
                Date date = (Date)object;
                return from_type.format(date);
            }else{
                return (String)object;
            }
        }
    }

    //标题样式
    public static WritableCellFormat getHeader(){
        
        WritableFont font = new WritableFont(WritableFont.TIMES,15,WritableFont.BOLD);
        
        WritableCellFormat  format  = new WritableCellFormat(font);
        try {
            format.setAlignment(Alignment.CENTRE);
            format.setOrientation(Orientation.HORIZONTAL);
        } catch (WriteException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        
        return format;
    }
    
    //获取用户名称
    /**
     *    id 用户id
     *  key:用于扩展属性的key值(若有)
     * */
    public String getUserInfo(String id,String key){
        if(userList !=null&&userList.size() > 0 ){
            for (User user : userList) {
                if( user.getId().equals(id))
                    return user.getName();
                
            }
        }
        return null;
    }
    
    //获取类型名称
    /**
     *    id 类型id
     *  key:用于扩展属性的key值 (若有)
     * */
    public String getAssetCategory(String id,String key){
      if(categoryList!=null && categoryList.size()>0){
          for (AssetCategoryDefine assetCategoryDefine : categoryList) {
                if(assetCategoryDefine.getId().equals(id))
                    return assetCategoryDefine.getName();
          }
      }
        return null;
    }
}
JExcelView.java

以上,代码编码完成,只用配置一下springMvc的正常配置足以。

关于JXL,SpringMvc 4.0已不再支持了,而且在实现的过程中,虽然功能可以实现,但是后台会报错。

/*
 * Copyright 2002-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.web.servlet.view.document;

import java.io.OutputStream;
import java.util.Locale;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import jxl.Workbook;
import jxl.write.WritableWorkbook;

import org.springframework.core.io.Resource;
import org.springframework.core.io.support.LocalizedResourceHelper;
import org.springframework.web.servlet.support.RequestContextUtils;
import org.springframework.web.servlet.view.AbstractView;

/**
 * Convenient superclass for Excel document views.
 *
 * <p>This class uses the <i>JExcelAPI</i> instead of <i>POI</i>.
 * More information on <i>JExcelAPI</i> can be found on their
 * <a href="http://www.andykhan.com/jexcelapi/" target="_blank">website</a>.
 *
 * <p>Properties:
 * <ul>
 * <li>url (optional): The url of an existing Excel document to pick as a
 * starting point. It is done without localization part nor the .xls extension.
 * </ul>
 *
 * <p>The file will be searched with locations in the following order:
 * <ul>
 * <li>[url]_[language]_[country].xls
 * <li>[url]_[language].xls
 * <li>[url].xls
 * </ul>
 *
 * <p>For working with the workbook in the subclass, see <a
 * href="http://www.andykhan.com/jexcelapi/">Java Excel API site</a>
 *
 * <p>As an example, you can try this snippet:
 *
 * <pre class="code">
 * protected void buildExcelDocument(
 *     Map&lt;String, Object&gt; model, WritableWorkbook workbook,
 *     HttpServletRequest request, HttpServletResponse response) {
 *
 *      if (workbook.getNumberOfSheets() == 0) {
 *        workbook.createSheet(&quot;Spring&quot;, 0);
 *   }
 *
 *      WritableSheet sheet = workbook.getSheet(&quot;Spring&quot;);
 *      Label label = new Label(0, 0, &quot;This is a nice label&quot;);
 *      sheet.addCell(label);
 * }</pre>
 *
 * The use of this view is close to the {@link AbstractExcelView} class,
 * just using the JExcel API instead of the Apache POI API.
 *
 * @author Bram Smeets
 * @author Alef Arendsen
 * @author Juergen Hoeller
 * @since 1.2.5
 * @see AbstractExcelView
 * @see AbstractPdfView
 * @deprecated as of Spring 4.0, since JExcelAPI is an abandoned project
 * (no release since 2009, with serious bugs remaining)
 */
@Deprecated
public abstract class AbstractJExcelView extends AbstractView {

因为以上,所以以下:

/*
 * Copyright 2002-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.web.servlet.view.document;

import java.util.Locale;
import java.util.Map;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;

import org.springframework.core.io.Resource;
import org.springframework.core.io.support.LocalizedResourceHelper;
import org.springframework.web.servlet.support.RequestContextUtils;
import org.springframework.web.servlet.view.AbstractView;

/**
 * Convenient superclass for Excel document views.
 * Compatible with Apache POI 3.5 and higher, as of Spring 4.0.
 *
 * <p>Properties:
 * <ul>
 * <li>url (optional): The url of an existing Excel document to pick as a starting point.
 * It is done without localization part nor the ".xls" extension.
 * </ul>
 *
 * <p>The file will be searched with locations in the following order:
 * <ul>
 * <li>[url]_[language]_[country].xls
 * <li>[url]_[language].xls
 * <li>[url].xls
 * </ul>
 *
 * <p>For working with the workbook in the subclass, see
 * <a href="http://jakarta.apache.org/poi/index.html">Jakarta\'s POI site</a>
 *
 * <p>As an example, you can try this snippet:
 *
 * <pre class="code">
 * protected void buildExcelDocument(
 *     Map&lt;String, Object&gt; model, HSSFWorkbook workbook,
 *     HttpServletRequest request, HttpServletResponse response) {
 *
 *   // Go to the first sheet.
 *   // getSheetAt: only if workbook is created from an existing document
 *      // HSSFSheet sheet = workbook.getSheetAt(0);
 *      HSSFSheet sheet = workbook.createSheet("Spring");
 *      sheet.setDefaultColumnWidth(12);
 *
 *   // Write a text at A1.
 *   HSSFCell cell = getCell(sheet, 0, 0);
 *   setText(cell, "Spring POI test");
 *
 *   // Write the current date at A2.
 *   HSSFCellStyle dateStyle = workbook.createCellStyle();
 *   dateStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("m/d/yy"));
 *   cell = getCell(sheet, 1, 0);
 *   cell.setCellValue(new Date());
 *   cell.setCellStyle(dateStyle);
 *
 *   // Write a number at A3
 *   getCell(sheet, 2, 0).setCellValue(458);
 *
 *   // Write a range of numbers.
 *   HSSFRow sheetRow = sheet.createRow(3);
 *   for (short i = 0; i < 10; i++) {
 *     sheetRow.createCell(i).setCellValue(i * 10);
 *   }
 * }</pre>
 *
 * This class is similar to the AbstractPdfView class in usage style.
 *
 * @author Jean-Pierre Pawlak
 * @author Juergen Hoeller
 * @see AbstractPdfView
 */
public abstract class AbstractExcelView extends AbstractView {

用AbstractExcelView替换,就需要引入Poi 

二、结合POI使用:

1、引入Poi

<dependency org="org.apache.poi" name="poi" rev="3.9" conf="compile->compile(*),master(*);runtime->runtime(*)" transitive="false"/>

2、接口与实现:

接口同上,实现源码:

@RestController
public class ExportRSImpl implements ExportRS {
@Override
    public ModelAndView exportExcel(String condition, 
            HttpServletRequest request, HttpServletResponse response) {
        try{
            NSearch nSearch = JsonObjUtil.JsonToObj(condition, NSearch.class);
            String userId = SecurityHelper.getCurrentUserId();
            QueryResult result = _mupport.search(nSearch, userId);
            long total = result.getTotalCount();
            //System.out.println("资产总数是:"+total);
            Map<String, Object> model = new HashMap<String, Object>();  
            model.put("total", total+"");
            model.put("filename", "资产信息-"+new SimpleDateFormat("yyyyMMddhhmmss").format(new Date())+".xls");
            model.put("items", result.getItems());
            //资产类型
            List<AssetCategoryDefine> categoryList =  _assetCatRp.findAllRestrict();
            //所有用户
            String stationId = SecurityHelper.getCurrentStationId();
            List<User> userList = _rpUser.findByStationId(stationId);
            model.put("allUser", userList);
            model.put("allCategory", categoryList);
            
            return new ModelAndView(new JPoiExcelView(),model);
        } catch (Throwable e) {
            throw new AssetRuntimeException(e);
        }
    }
}
ExportRSImpl.java

3、ModelAndView实现:

public class JPoiExcelView extends AbstractExcelView{

    private static Logger logger = LoggerFactory.getLogger(JPoiExcelView.class);
    
    String[] tilte = new String[]{"序号","资产名称","资产类型","创建时间","删除人","删除时间","删除主机"};
    
    List<AssetCategoryDefine> categoryList = null;
    List<User> userList = null;
    
    HSSFCellStyle headerStyle = null;
    HSSFCellStyle contextStyle = null;
    
    @SuppressWarnings("unchecked")
    @Override
    protected void buildExcelDocument(Map<String, Object> model, 
            HSSFWorkbook workbook, 
            HttpServletRequest request,
            HttpServletResponse response){
        OutputStream os = null;  
        try {
            categoryList = (List<AssetCategoryDefine>)model.get("allCategory");
            userList = (List<User>)model.get("allUser");
            String filename = (String)model.get("filename");
            //String total = (String)model.get("total");
            //响应信息,弹出文件下载窗口
            response.setContentType("APPLICATION/OCTET-STREAM");
            response.setHeader("Content-Disposition",  "attachment; filename=" 
                            + URLEncoder.encode(filename, "UTF-8"));  
            os = response.getOutputStream();
            HSSFSheet sheet = workbook.createSheet("资产信息");
            
            headerStyle = getHeader(workbook);
            contextStyle = getContext(workbook);
            
            String titleName = "资产信息";
            //添加标题和文件列表头
            addTitle(sheet,tilte,titleName);
            //添加文件信息
            List<MObject> list = (List<MObject>)model.get("items");
            addContextByList(sheet,list,tilte.length);
            
            workbook.write(os);
        } catch (Throwable e) {
            logger.error("资产信息导出出错:"+e.getMessage(),e);
        }finally {
            try {
                    os.flush();
                    os.close();
                } catch (Throwable e) {
                    logger.error("资产信息导出Excel出错:"+e.getMessage(),e);
                }
        }
        
    }

    //添加标题和列头信息
    public void addTitle(HSSFSheet sheet, String[] assettitle, String total,String titleName){
        HSSFRow row = sheet.createRow(0);
        HSSFCell cell = row.createCell(2);
        cell.setCellValue(titleName+"(共有"+total+"条)");
        row = sheet.createRow(1);
        for (int i = 0; i < assettitle.length; i++) {
            cell = row.createCell(i);
            cell.setCellValue(assettitle[i]);
        }
    }
    
    //添加标题和列头信息
    public void addTitle(HSSFSheet sheet, String[] assettitle,String titleName) {
        //添加标题第一行 合并单元格
        sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, assettitle.length-1));
        HSSFRow row = sheet.createRow(0);
        HSSFCell cell = row.createCell(0);
        cell.setCellValue(titleName);
        cell.setCellStyle(headerStyle);
        row = sheet.createRow(1);
        for (int i = 0; i < assettitle.length; i++) {
            cell = row.createCell(i);
            cell.setCellValue(assettitle[i]);
            cell.setCellStyle(contextStyle);
        }
    }

    //添加所有文件信息 从第三行开始添加
    //{"序号","资产名称","资产类型","创建时间","删除人","删除时间","删除主机"};
    @SuppressWarnings("unchecked")
    private <T> void addContextByList(HSSFSheet sheet, List<T> list, int length){
        
        try {
            HSSFRow row = null;
            HSSFCell cell = null;
            if (list!=null) {
                List<MObject> mObjects = (List<MObject>)list;
                MObject mObject = null;
                String value = "";
                for (int i = 0; i < list.size(); i++) {
                    row = sheet.createRow(i+2);
                    for (int j = 0; j < length; j++) {
                        mObject = mObjects.get(i);
                        if(j==0){
                            cell =  row.createCell(j);
                            cell.setCellValue(i+"");
                            cell.setCellStyle(contextStyle);
                        }else{
                            value = getValue(mObject,j);
                            cell =  row.createCell(j);
                            cell.setCellValue(value);
                            cell.setCellStyle(contextStyle);
                        }
                    }
                }
                
                for (int j = 1; j < length; j++) {
                    sheet.autoSizeColumn(j); //单元格宽度 以最大的为准
                }
            }else{
                row = sheet.createRow(2);
                cell =  row.createCell(0);
            }
        } catch (Throwable e) {
            logger.error("填充内容出现错误:"+e.getMessage(),e);
        }
    }

    //根据列名获取值,先写死,之后再想其他办法
    //{"序号","资产名称","资产类型","创建时间","删除人","删除时间","删除主机"};
    private String getValue(MObject mObject, int j) {

        switch (j) {
        case 1:
            return mObject.getName();
        case 2:
            return getAssetCategory(objectToString(mObject.getCategoryId()),null);
        case 3:
            return objectToString(mObject.getCreatedTime());
        case 4:
            return getUserInfo(objectToString(mObject.getDeletedBy()),null);
        case 5:
            return objectToString(mObject.getDeletedTime());
        case 6:
            return objectToString(mObject.getExtraData()==null? "" :mObject.getExtraData().get("delHostName"));
        default:
        }
        return "";
    }
    
    private String objectToString(Object object){
        if(object==null){
            return "";
        }else{
            if(object instanceof Date){
                DateFormat from_type = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  
                Date date = (Date)object;
                return from_type.format(date);
            }else{
                return (String)object;
            }
        }
    }

    //标题样式
    public static HSSFCellStyle getHeader(HSSFWorkbook workbook){
        
        HSSFCellStyle format = workbook.createCellStyle();
        HSSFFont font = workbook.createFont();
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);  //加粗
        font.setFontName("黑体");
        font.setFontHeightInPoints((short)16);
        format.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
        format.setAlignment(HSSFCellStyle.ALIGN_CENTER);    
        format.setFont(font);
        return format;
    }
    
    //内容样式
    public static HSSFCellStyle getContext(HSSFWorkbook workbook){
        
        HSSFCellStyle format = workbook.createCellStyle();
        HSSFFont font = workbook.createFont();
        font.setFontName("宋体");
        format.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
        format.setAlignment(HSSFCellStyle.ALIGN_CENTER);    
        format.setFont(font);
        return format;
    }
    
    
    //获取用户名称
    /**
     *    id 用户id
     *  key:用于扩展属性的key值(若有)
     * */
    public String getUserInfo(String id,String key){
        if(userList !=null&&userList.size() > 0 ){
            for (User user : userList) {
                if( user.getId().equals(id))
                    return user.getName();
                
            }
        }
        return "";
    }
    
    //获取类型名称
    /**
     *    id 类型id
     *  key:用于扩展属性的key值 (若有)
     * */
    public String getAssetCategory(String id,String key){
      if(categoryList!=null && categoryList.size()>0){
          for (AssetCategoryDefine assetCategoryDefine : categoryList) {
                if(assetCategoryDefine.getId().equals(id))
                    return assetCategoryDefine.getName();
          }
      }
        return "";
    }
}
JPoiExcelView.java

以上,代码编写完成:

三、为了方便,写一个工具类:

package com.cdv.edit.utils;

import java.lang.reflect.Method;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Map;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.ss.util.CellRangeAddress;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.StringUtils;

/**
 * 生成Excel的工具类
 */
public class PoiExcelUtils {

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