java导出excel设置表头

import java.sql.SQLException;

import java.util.List;

 

import javax.servlet.http.HttpServletRequest;

 

import org.apache.poi.hssf.usermodel.HSSFCell;

import org.apache.poi.hssf.usermodel.HSSFCellStyle;

import org.apache.poi.hssf.usermodel.HSSFFont;

import org.apache.poi.hssf.usermodel.HSSFPrintSetup;

import org.apache.poi.hssf.usermodel.HSSFRichTextString;

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.hssf.util.CellRangeAddress;

 

public class Excel {

 

         private HSSFWorkbook wb = null;

 

         private HSSFSheet sheet = null;

 

         private HSSFRow row = null;

 

         private HSSFCell cell = null;

 

         private HSSFCellStyle titleStyle = null;

 

         private HSSFCellStyle headStyle = null;

 

         private HSSFCellStyle bodyStyle = null;

 

         private int num = 0;

         

         private int headLength = 0;

 

         public Excel() {

                   wb = new HSSFWorkbook();

                   sheet = wb.createSheet();

                   sheet.setDefaultColumnWidth(14);

                   sheet.setDefaultRowHeight((short)20);

                   //打印设置

                   HSSFPrintSetup hps = sheet.getPrintSetup(); 

                   hps.setPaperSize(HSSFPrintSetup.A4_PAPERSIZE); // 设置A4

                   hps.setLandscape(true); // 将页面设置为横向打印模式

//               sheet.setHorizontallyCenter(true); // 设置打印页面为水平居中

//               sheet.setVerticallyCenter(true); // 设置打印页面为垂直居中

                   //冻结第一行和第二行

                   sheet.createFreezePane( 0, 2, 0, 2 );

 

                   

                   init();

         }

         

         /**

          初始化样式

          */

         private void init() {

                   titleFont();

                   headFont();

                   bodyFont();

         }

 

         /**

          设置标题样式

          

          */

         private void titleFont() {

                   HSSFFont titleFont = wb.createFont();

                   titleFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);

                   titleFont.setFontName("宋体");

                   titleFont.setFontHeightInPoints((short) 18);

                   titleStyle = wb.createCellStyle();

                   titleStyle.setFont(titleFont);

//               titleStyle.setBorderTop((short)1);

//               titleStyle.setBorderRight((short)1);

                   titleStyle.setBorderBottom((short)1);

//               titleStyle.setBorderLeft((short)1);

                   

                   titleStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);

 

         }

 

         /**

          设置head样式

          

          */

         private void headFont() {

 

                   HSSFFont headFont = wb.createFont();

                   headFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);

                   headFont.setFontName("宋体");

                   headFont.setFontHeightInPoints((short) 11);

                   headStyle = wb.createCellStyle();

                   headStyle.setFont(headFont);

                   headStyle.setBorderTop((short)1);

                   headStyle.setBorderRight((short)1);

                   headStyle.setBorderBottom((short)1);

                   headStyle.setBorderLeft((short)1);

                   headStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);

         }

 

         /**

          设置body样式

          

          */

         private void bodyFont() {

                   HSSFFont bodyFont = wb.createFont();

                   bodyFont.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);

                   bodyFont.setFontName("宋体");

                   bodyFont.setFontHeightInPoints((short) 9);

                   bodyStyle = wb.createCellStyle();

                   bodyStyle.setFont(bodyFont);

                   bodyStyle.setBorderTop((short)1);

                   bodyStyle.setBorderRight((short)1);

                   bodyStyle.setBorderBottom((short)1);

                   bodyStyle.setBorderLeft((short)1);

                   bodyStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);

                   bodyStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

         }

         

         /**

          生成Excel主方法

          * @param xml :包括titlehead的内容和设置

          * @param list :内容

          * @param fit :是否需要宽度自适应

          * @return HSSFWorkbook

          * @throws SQLException

          */

         public HSSFWorkbook createWorkBook(final ExcelHeadXML xml, final List<Object[]> list, boolean fit) throws SQLException {

                   createTop(xml);

                   /*

                   List<Object[]> list1 = new LinkedList<Object[]>();

                   list1.add(new Object[]{"000003","武汉市XXX公司","XXXXXX","VVVVVVVV","dddd","23","2009-04-04"});

                   list1.add(new Object[]{"000003","武汉市XXX公司","XXXXXX","VVVVVVVV","dddd","23","2009-04-04"});

                   list1.add(new Object[]{"000003","武汉市XXX公司","XXXXXX","VVVVVVVV","dddd","23","2009-04-04"});

                   list1.add(new Object[]{"000003","武汉市XXX公司","XXXXXX","VVVVVVVV","dddd","23","2009-04-04"});

                   list1.add(new Object[]{"000003","武汉市XXX公司","XXXXXX","VVVVVVVV","dddd","23","2009-04-04"});

                   list1.add(new Object[]{"000003","武汉市XXX公司","XXXXXX","VVVVVVVV","dddd","23","2009-04-04"});

                   list1.add(new Object[]{"000003","武汉市XXX公司","XXXXXX","VVVVVVVV","dddd","23","2009-04-04"});

                   list1.add(new Object[]{"000003","武汉市XXX公司","XXXXXX","VVVVVVVV","dddd","23","2009-04-04"});

                   list1.add(new Object[]{"000003","武汉市XXX公司","XXXXXX","VVVVVVVV","dddd","23","2009-04-04"});

                   list1.add(new Object[]{"000003","武汉市XXX公司","XXXXXX","VVVVVVVV","dddd","23","2009-04-04"});

                   list1.add(new Object[]{"000003","武汉市XXX公司","XXXXXX","VVVVVVVV","dddd","23","2009-04-04"});

                   list1.add(new Object[]{"000003","武汉市XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX公司","XXXXXX","VVVVVVVV","dddd","23","2009-04-04"});

                   createBody(list1,true);

                   */

                   createBody(list,true);

                   //宽度自适应

                   if(fit){

                            for(int i=0; i<headLength; i++){

                                     sheet.autoSizeColumn(i); 

                            }

                   }

                   return wb;

         }

         

         /**

          生成Excel主方法

          * @param xml :包括titlehead的内容和设置

          * @param list :内容

          * @param fit :是否需要宽度自适应

          * @return HSSFWorkbook

          * @throws SQLException

          */

         public HSSFWorkbook createWorkBook(final ExcelHeadXML xml,HttpServletRequest request, final List<Object[]> list, boolean fit) throws SQLException {

                   createTop(xml,request);

                   createBody(list,true);

                   //宽度自适应

                   if(fit){

                            for(int i=0; i<headLength; i++){

                                     sheet.autoSizeColumn(i); 

                            }

                   }

                   return wb;

         }

         

         /**

          创建ExcelHeadtitle部分

          * @param xml ExcelHeadXML

          */

         @SuppressWarnings("deprecation")

         private void createTop(final ExcelHeadXML xml,HttpServletRequest request) {

                   //创建Title部分

                   if (null != xml.getTitle() && !"".equals(xml.getTitle())) {

                            row = sheet.createRow(num++);

                            cell = row.createCell(0);

                            cell.setCellStyle(titleStyle);

                            sheet.addMergedRegion(new CellRangeAddress(xml.getUniteRowStart(),

                                               xml.getUniteRowEnd(), xml.getUniteCellStart(), xml

                                                                 .getUniteRowCount()));

                            

                   }

                   //创建Head部分

                   List<String> head = xml.getHead();

                   if(null != head && head.size() > 0){

                            headLength = xml.getHeadLength();

                            row = sheet.createRow(num++);

                            for(int i=0; i<head.size(); i++){

                                     cell = row.createCell(i);

                                     cell.setCellStyle(headStyle);

                                     cell.setCellValue(new HSSFRichTextString(head.get(i)));

                                     

                            }

                   }

         }

         

         

         /**

          创建ExcelHeadtitle部分

          * @param xml ExcelHeadXML

          */

         @SuppressWarnings("deprecation")

         private void createTop(final ExcelHeadXML xml) {

                   //创建Title部分

                   if (null != xml.getTitle() && !"".equals(xml.getTitle())) {

                            row = sheet.createRow(num++);

                            cell = row.createCell(0);

                            cell.setCellStyle(titleStyle);

                            cell.setCellValue(new HSSFRichTextString(xml.getTitle().trim()));

                            sheet.addMergedRegion(new CellRangeAddress(xml.getUniteRowStart(),

                                               xml.getUniteRowEnd(), xml.getUniteCellStart(), xml

                                                                 .getUniteRowCount()));

                            

                   }

                   //创建Head部分

                   List<String> head = xml.getHead();

                   if(null != head && head.size() > 0){

                            headLength = xml.getHeadLength();

                            row = sheet.createRow(num++);

                            for(int i=0; i<head.size(); i++){

                                     cell = row.createCell(i);

                                     cell.setCellStyle(headStyle);

                                     cell.setCellValue(new HSSFRichTextString(head.get(i)));

                                     

                            }

                   }

         }

         /**

          创建Excelbody部分

          * @param list : body部分的数据

          * @param useId : body部分是否要序号

          * @throws SQLException 

          */

         private void createBody(final List<Object[]> list, boolean useId) throws SQLException {

                   if(null != list && list.size() > 0){

                            Object[] o;

                            

                            for(int i=0; i<list.size(); i++){

                                     row = sheet.createRow(num++);

                                     row.setHeightInPoints(30);

                                     o = list.get(i);

                                     if(useId){

                                               //序号

                                               cell = row.createCell(0);

                                               cell.setCellStyle(bodyStyle);

                                               cell.setCellValue(new HSSFRichTextString((i+1)+""));

                                               

                                     }

                                     for(int j=0; j<o.length; j++){

                                               if(useId){

                                                        cell = row.createCell(j+1);

                                               }else{

                                                        cell = row.createCell(j);

                                               }

                                               cell.setCellStyle(bodyStyle);

                                               cell.setCellValue(new HSSFRichTextString(emptyToString(o[j])));

                                               

                                     }

                            }

                   }

         } 

 

 

 

 

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