创建一个封装类：
1 package com.jason.excel;
2
3 import java.io.FileNotFoundException;
4 import java.io.FileOutputStream;
5 import java.io.IOException;
6
7 import org.apache.poi.hssf.usermodel.HSSFCell;
8 import org.apache.poi.hssf.usermodel.HSSFCellStyle;
9 import org.apache.poi.hssf.usermodel.HSSFFont;
10 import org.apache.poi.hssf.usermodel.HSSFRow;
11 import org.apache.poi.hssf.usermodel.HSSFSheet;
12 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
13 import org.apache.poi.ss.usermodel.Cell;
14 import org.apache.poi.ss.usermodel.CellValue;
15 import org.apache.poi.ss.usermodel.FormulaEvaluator;
16 import org.apache.poi.ss.util.CellRangeAddress;
17
18
19 /**
20 * 生成可以合并的单元格的Excel
21 * @function
22 * @author 小风微凉
23 * @time 2018-8-9 下午8:02:30
24 */
25 public class CreateExcelUtil {
26
27 /**
28 * 生成字体（HSSFFont）
29 * @param workBook excel对象（必输项）
30 * @param fontName 字体名称（选填项，可直接null默认处理）
31 * @param fontSize 字体大小(选填项，可直接-1，默认处理)
32 * @param fontColor 字体颜色(选填项，可直接-1，默认处理)
33 * @return
34 */
35 public static HSSFFont getFont(HSSFWorkbook workBook,String fontName,int fontSize,int fontColor){
36 HSSFFont font=workBook.createFont();
37 if(fontName==null){
38 font.setFontName("宋体");
39 }else{
40 font.setFontName(fontName);
41 }
42 if(fontSize<=0){
43 font.setFontHeightInPoints((short) 14);// 设置字体大小
44 }else{
45 font.setFontHeightInPoints((short) fontSize);// 设置字体大小
46 }
47 if(fontColor>0){
48 font.setColor((short) fontColor);
49 }
50 return font;
51 }
52 /**
53 * 获取样式（HSSFCellStyle）
54 * @param workBook excel对象（必输项）
55 * @param lfc 样式对齐类型，默认null居中，lfc="left" lfc="right" lfc="center"
56 * @return
57 */
58 public static HSSFCellStyle getStyle(HSSFWorkbook workBook,HSSFFont font,String lfc){
59 HSSFCellStyle style=workBook.createCellStyle();
60 //默认上下居中
61 style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//上下居中
62 if(lfc==null || "center".equals(lfc)){
63 style.setAlignment(HSSFCellStyle.ALIGN_CENTER);//字体居中
64 }else if("left".equals(lfc)){
65 style.setAlignment(HSSFCellStyle.ALIGN_LEFT);//字体居左
66 }else if("right".equals(lfc)){
67 style.setAlignment(HSSFCellStyle.ALIGN_RIGHT);//字体居右
68 }else{
69 style.setAlignment(HSSFCellStyle.ALIGN_CENTER);//字体居中
70 }
71 if(font!=null){
72 style.setFont(font);
73 }
74 return style;
75 }
76 /**
77 * 合并行，合并列处理
78 * @param sheet 当前sheet对象
79 * @param fromRowIndex 从第*行开始（起始索引值为0）
80 * @param toRowIndex 到第*行结束
81 * @param fromColIndex 从第*列开始（起始索引值为0）
82 * @param toColIndex 到第*列结束
83 * @see 举例：setMergeArea(sheet,0,0,0,1):合并sheet下的第一行，前2列
84 */
85 public static void setMergeArea(HSSFSheet sheet,int fromRowIndex,int toRowIndex,int fromColIndex,int toColIndex){
86 sheet.addMergedRegion(new CellRangeAddress(fromRowIndex,toRowIndex,fromColIndex,toColIndex));
87 }
88
89 /**
90 * 生成指定行的单元格
91 * @param row 指定行对象
92 * @param cellIndex 单元格在所在行的列索引值
93 * @param style 单元格样式对象
94 * @param info 单元格内的信息
95 * @return
96 */
97 public static HSSFCell createCell(HSSFRow row,int cellIndex,HSSFCellStyle style,String info){
98 HSSFCell cell=row.createCell(cellIndex);
99 if(style!=null){
100 cell.setCellStyle(style);
101 }
102 if(!"".equals(info) && info!=null){
103 cell.setCellValue(info);
104 }
105 return cell;
106 }
107 /**
108 * 获取默认sheet对象
109 * @param workBook excel对象
110 * @param defaultColWidth 列宽（字符个数宽度）
111 * @return
112 */
113 public static HSSFSheet getDefaultSheet(HSSFWorkbook workBook,int defaultColWidth){
114 HSSFSheet sheet = workBook.createSheet();
115 //设置默认列宽
116 if(defaultColWidth<=0){
117 sheet.setDefaultColumnWidth(13);
118 }else{
119 sheet.setDefaultColumnWidth(defaultColWidth);
120 }
121 return sheet;
122 }
123 /**
124 * 生成一个单元行对象
125 * @param sheet sheet对象
126 * @param rowIndex 生成的行索引值
127 * @param defaultHeight 设置默认行的高度
128 * @return
129 */
130 public static HSSFRow creatRow(HSSFSheet sheet,int rowIndex,int defaultHeight){
131 HSSFRow row=sheet.createRow(rowIndex);
132 if(defaultHeight>0){
133 row.setHeight((short)defaultHeight);
134 }
135 return row;
136 }
137 /**
138 * 获取自带统计功能的单元格对象
139 * @param workBook excel对象
140 * @param row 指定行对象
141 * @param cellIndex 单元格在所在行的列索引值
142 * @param style 单元格样式对象
143 * @param info 单元格内的信息
144 * @param formula 计算公式
145 * @return
146 */
147 public static HSSFCell createCellFormula(HSSFWorkbook workBook,HSSFRow row,int cellIndex,HSSFCellStyle style,String info,String formula){
148 HSSFCell cell=row.createCell(cellIndex);
149 if(style!=null){
150 cell.setCellStyle(style);
151 }
152 if(!"".equals(info) && info!=null){
153 cell.setCellValue(info);
154 }
155 cell.setCellType(Cell.CELL_TYPE_FORMULA);
156 cell.setCellFormula(formula);//计算公式
157 FormulaEvaluator evaluator = workBook.getCreationHelper().createFormulaEvaluator();
158 evaluator.evaluateFormulaCell(cell);
159 CellValue cellValue = evaluator.evaluate(cell);
160 return cell;
161 }
162 /**
163 * 统计计算公式(+)求和
164 * @param tagert 列标记
165 * @param begIndex 起始索引
166 * @param endIndex 终止索引
167 * @return 返回计算公式
168 */
169 public static String getSumStr(String tagert,int begIndex,int endIndex){
170 String retStr=tagert+begIndex;
171 for(int i=begIndex+1;i<=endIndex;i++ ){
172 retStr+=("+"+tagert+i);
173 }
174 return "SUM("+retStr+")";
175 }
176 /**
177 * 生产excel文件到指定的路径下
178 * @param workBook excel对象
179 * @param sheetName sheet名称
180 * @param filePathName 保存路径
181 */
182 public static void writeToExcelFile(HSSFWorkbook workBook,String sheetName,String filePathName){
183 workBook.setSheetName(0,sheetName);
184 FileOutputStream fileOut = null;
185 try {
186 fileOut = new FileOutputStream(filePathName);
187 } catch (FileNotFoundException e1) {
188 e1.printStackTrace();//异常信息需要日志记录
189 }
190 try {
191 workBook.write( fileOut );
192 } catch (IOException e) {
193 e.printStackTrace();
194 }
195 }
196 }
测试类：
1 package com.jason.test;
2
3 import java.io.FileNotFoundException;
4 import java.io.FileOutputStream;
5 import java.io.IOException;
6
7 import org.apache.poi.hssf.usermodel.HSSFCell;
8 import org.apache.poi.hssf.usermodel.HSSFCellStyle;
9 import org.apache.poi.hssf.usermodel.HSSFFont;
10 import org.apache.poi.hssf.usermodel.HSSFRow;
11 import org.apache.poi.hssf.usermodel.HSSFSheet;
12 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
13 import org.apache.poi.ss.usermodel.Cell;
14 import org.apache.poi.ss.usermodel.CellValue;
15 import org.apache.poi.ss.usermodel.FormulaEvaluator;
16 import org.apache.poi.ss.util.CellRangeAddress;
17
18 import com.jason.excel.CreateExcelUtil;
19
20 public class Test2 {
21 /**
22 * 每个报表都不相同
23 */
24 private static String[] arr={"B","C","D","E","F","G","H","I","J","K","L"};
25 public static void main(String[] args)throws FileNotFoundException, IOException {
26 // 创建HSSFWorkbook对象
27 HSSFWorkbook workBook = new HSSFWorkbook();
28 //创建sheet对象
29 HSSFSheet sheet = CreateExcelUtil.getDefaultSheet(workBook,13);
30 //创建字体和样式
31 HSSFFont font=CreateExcelUtil.getFont(workBook, null, -1, -1);
32 HSSFCellStyle style=CreateExcelUtil.getStyle(workBook, font,"center");//居中样式
33 HSSFCellStyle style_left=CreateExcelUtil.getStyle(workBook,font, "left");//居左样式
34
35 //创建第1行
36 CreateExcelUtil.setMergeArea(sheet, 0,0,0,11);
37 HSSFRow row_1=CreateExcelUtil.creatRow(sheet, 0, 500);
38 HSSFCell cell_1_1=CreateExcelUtil.createCell(row_1, 0, style, "企业网银关键业务统计报表");
39 //创建第2行
40 CreateExcelUtil.setMergeArea(sheet, 1,1,1,3);
41 CreateExcelUtil.setMergeArea(sheet, 1,1,5,11);
42 HSSFRow row_2=CreateExcelUtil.creatRow(sheet, 1, 400);
43 //报表类型
44 HSSFCell cell_2_1=CreateExcelUtil.createCell(row_2, 0, style, "报表类型");
45 HSSFCell cell_2_2=CreateExcelUtil.createCell(row_2, 1, style_left,"日报表" );
46 //统计时间
47 HSSFCell cell_2_3=CreateExcelUtil.createCell(row_2, 4, style, "统计时间");
48 HSSFCell cell_2_4=CreateExcelUtil.createCell(row_2, 5, style_left, "2018/08/08-2018/08/09");
49 //创建第3行
50 CreateExcelUtil.setMergeArea(sheet, 2,2,1,3);
51 CreateExcelUtil.setMergeArea(sheet, 2,2,5,11);
52 HSSFRow row_3=CreateExcelUtil.creatRow(sheet, 2, -1);
53 //机构类型
54 HSSFCell cell_3_1=CreateExcelUtil.createCell(row_3, 0, style, "机构类型");
55 HSSFCell cell_3_2=CreateExcelUtil.createCell(row_3, 1, style_left,"分行" );
56 //机构名称
57 HSSFCell cell_3_3=CreateExcelUtil.createCell(row_3, 4, style, "机构名称");
58 HSSFCell cell_3_4=CreateExcelUtil.createCell(row_3, 5, style_left,"云南红塔银行总行营业部汇总" );
59 //创建第4行
60 CreateExcelUtil.setMergeArea(sheet,3,3,1,11);
61 HSSFRow row_4=CreateExcelUtil.creatRow(sheet, 3, -1);
62 //统计渠道
63 HSSFCell cell_4_1=CreateExcelUtil.createCell(row_4, 0, style, "统计渠道");
64 HSSFCell cell_4_2=CreateExcelUtil.createCell(row_4, 1, style_left,"全部" );
65 //创建第5行
66 CreateExcelUtil.setMergeArea(sheet, 4,4,0,11);
67 HSSFRow row_5=CreateExcelUtil.creatRow(sheet, 4, -1);
68 //创建第6行和第7行
69 CreateExcelUtil.setMergeArea(sheet, 5,6,0,1);//一级业务
70 CreateExcelUtil.setMergeArea(sheet, 5,6,2,3);//二级业务
71 CreateExcelUtil.setMergeArea(sheet, 5,5,4,5);//成功数
72 CreateExcelUtil.setMergeArea(sheet, 5,5,6,7);//失败数
73 CreateExcelUtil.setMergeArea(sheet, 5,5,8,9);//成功金额
74 CreateExcelUtil.setMergeArea(sheet, 5,5,10,11);//失败金额
75 HSSFRow row_6=CreateExcelUtil.creatRow(sheet, 5, -1);
76 HSSFRow row_7=CreateExcelUtil.creatRow(sheet, 6, -1);
77 //一级业务
78 HSSFCell cell_6_1=CreateExcelUtil.createCell(row_6, 0, style, "一级业务");
79 //二级业务
80 HSSFCell cell_6_2=CreateExcelUtil.createCell(row_6, 2, style, "二级业务");
81 //成功数
82 HSSFCell cell_6_3=CreateExcelUtil.createCell(row_6, 4, style, "成功数");
83 //单位个人
84 HSSFCell cell_7_1=CreateExcelUtil.createCell(row_7, 4, style, "单位");
85 HSSFCell cell_7_2=CreateExcelUtil.createCell(row_7, 5, style, "个人");
86 //失败数
87 HSSFCell cell_6_4=CreateExcelUtil.createCell(row_6, 6, style, "失败数");
88 //单位个人
89 HSSFCell cell_7_3=CreateExcelUtil.createCell(row_7, 6, style, "单位");
90 HSSFCell cell_7_4=CreateExcelUtil.createCell(row_7, 7, style, "个人");
91 //成功金额
92 HSSFCell cell_6_5=CreateExcelUtil.createCell(row_6, 8, style, "成功金额");
93 //单位个人
94 HSSFCell cell_7_5=CreateExcelUtil.createCell(row_7, 8, style, "单位");
95 HSSFCell cell_7_6=CreateExcelUtil.createCell(row_7, 9, style, "个人");
96 //失败金额
97 HSSFCell cell_6_6=CreateExcelUtil.createCell(row_6, 10, style, "失败金额");
98 //单位个人
99 HSSFCell cell_7_7=CreateExcelUtil.createCell(row_7, 10, style, "单位");
100 HSSFCell cell_7_8=CreateExcelUtil.createCell(row_7, 11, style, "个人");
101
102
103 //循环处理数据
104 int rowIndex=7;//从第7行开始计算
105 int dataCount=7;
106 for(int i=0;i<10;i++,rowIndex++){//循环产生行数据
107 dataCount++;
108 //创建新的行
109 HSSFRow row_index=CreateExcelUtil.creatRow(sheet, rowIndex, -1);
110 HSSFCell cell_1=CreateExcelUtil.createCell(row_index, 0, style, "世博支行");
111 for(int j=1;j<12;j++){//循环产生列数据
112 HSSFCell cell=CreateExcelUtil.createCell(row_index, j, style, "100");
113 }
114 }
115
116 //合计统计
117 HSSFRow row_total=CreateExcelUtil.creatRow(sheet, rowIndex, -1);
118 HSSFCell cell_total=CreateExcelUtil.createCell(row_total, 0, style, "合计");
119 for(int i=0;i<arr.length;i++){
120 String formula=CreateExcelUtil.getSumStr(arr[i],8,dataCount);
121 HSSFCell cell=CreateExcelUtil.createCellFormula(workBook,row_total, i+1, style, null,formula);
122 }
123 //开始写入文件： 定义你需要的输出流
124 CreateExcelUtil.writeToExcelFile(workBook, "企业网银关键业务统计报表", "./test.xls");
125 }
126 }
生成结果图：
未封装的代码：
1 package com.jason.test;
2
3 import java.io.FileNotFoundException;
4 import java.io.FileOutputStream;
5 import java.io.IOException;
6
7 import org.apache.poi.hssf.usermodel.HSSFCell;
8 import org.apache.poi.hssf.usermodel.HSSFCellStyle;
9 import org.apache.poi.hssf.usermodel.HSSFFont;
10 import org.apache.poi.hssf.usermodel.HSSFRow;
11 import org.apache.poi.hssf.usermodel.HSSFSheet;
12 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
13 import org.apache.poi.hssf.util.HSSFColor;
14 import org.apache.poi.ss.usermodel.Cell;
15 import org.apache.poi.ss.usermodel.CellStyle;
16 import org.apache.poi.ss.usermodel.CellValue;
17 import org.apache.poi.ss.usermodel.FormulaEvaluator;
18 import org.apache.poi.ss.util.CellRangeAddress;
19
20 public class Test {
21 /**
22 * 每个报表都不相同
23 */
24 private static String[] arr={"B","C","D","E","F","G","H","I","J","K","L"};
25 public static void main(String[] args)throws FileNotFoundException, IOException {
26 // 创建HSSFWorkbook对象
27 HSSFWorkbook workBook = new HSSFWorkbook();
28 //创建sheet对象
29 HSSFSheet sheet = workBook.createSheet();
30 //设置默认列宽
31 sheet.setDefaultColumnWidth(13);
32 //创建字体和样式
33 HSSFFont font=workBook.createFont();
34 HSSFCellStyle style=workBook.createCellStyle();//居中样式
35 HSSFCellStyle style_left=workBook.createCellStyle();
36
37 /**
38 * 设置边框样式
39 * style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
40 * style.setBottomBorderColor(HSSFColor.BLACK.index);
41 * style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
42 * style.setLeftBorderColor(HSSFColor.BLACK.index);
43 * style.setBorderRight(HSSFCellStyle.BORDER_THIN);
44 * style.setRightBorderColor(HSSFColor.BLACK.index);
45 * style.setBorderTop(HSSFCellStyle.BORDER_THIN);
46 * style.setTopBorderColor(HSSFColor.BLACK.index);
47 */
48
49
50 /**
51 * 设置背景色样式
52 * style.setFillForegroundColor(HSSFColor.LEMON_CHIFFON.index);
53 * style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);//单元格模式[SOLID_FOREGROUND]
54 */
55 style.setAlignment(HSSFCellStyle.ALIGN_CENTER);//设置字体居中（OK）
56 style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//上下居中
57 style_left.setVerticalAlignment(HSSFCellStyle.ALIGN_LEFT);//上下居左
58
59 font.setFontName("宋体");
60 font.setFontHeightInPoints((short) 14);// 设置字体大小
61 style.setFont(font);//设置字体样式
62 style_left.setFont(font);//设置字体样式
63 //创建第1行
64 sheet.addMergedRegion(new CellRangeAddress(0,0,0,11));
65 HSSFRow row_1=sheet.createRow(0);
66 //设置行高
67 row_1.setHeight((short)500);
68 HSSFCell cell_1_1=row_1.createCell(0);
69 cell_1_1.setCellStyle(style);
70 cell_1_1.setCellValue("企业网银关键业务统计报表");
71 //创建第2行
72 sheet.addMergedRegion(new CellRangeAddress(1,1,1,3));
73 sheet.addMergedRegion(new CellRangeAddress(1,1,5,11));
74 HSSFRow row_2=sheet.createRow(1);
75 row_2.setHeight((short)400);
76 //报表类型
77 HSSFCell cell_2_1=row_2.createCell(0);
78 cell_2_1.setCellStyle(style);
79 cell_2_1.setCellValue("报表类型");
80 HSSFCell cell_2_2=row_2.createCell(1);
81 cell_2_2.setCellStyle(style_left);
82 cell_2_2.setCellValue("日报表");
83 //统计时间
84 HSSFCell cell_2_3=row_2.createCell(4);
85 cell_2_3.setCellStyle(style);
86 cell_2_3.setCellValue("统计时间");
87 HSSFCell cell_2_4=row_2.createCell(5);
88 cell_2_4.setCellStyle(style_left);
89 cell_2_4.setCellValue("2018/08/08-2018/08/09");
90 //创建第3行
91 sheet.addMergedRegion(new CellRangeAddress(2,2,1,3));
92 sheet.addMergedRegion(new CellRangeAddress(2,2,5,11));
93 HSSFRow row_3=sheet.createRow(2);
94 //机构类型
95 HSSFCell cell_3_1=row_3.createCell(0);
96 cell_3_1.setCellStyle(style);
97 cell_3_1.setCellValue("机构类型");
98 HSSFCell cell_3_2=row_3.createCell(1);
99 cell_3_2.setCellStyle(style_left);
100 cell_3_2.setCellValue("分行");
101 //机构名称
102 HSSFCell cell_3_3=row_3.createCell(4);
103 cell_3_3.setCellStyle(style);
104 cell_3_3.setCellValue("机构名称");
105 HSSFCell cell_3_4=row_3.createCell(5);
106 cell_3_4.setCellStyle(style_left);
107 cell_3_4.setCellValue("云南红塔银行总行营业部汇总");
108 //创建第4行
109 sheet.addMergedRegion(new CellRangeAddress(3,3,1,11));
110 HSSFRow row_4=sheet.createRow(3);
111 //统计渠道
112 HSSFCell cell_4_1=row_4.createCell(0);
113 cell_4_1.setCellStyle(style);
114 cell_4_1.setCellValue("统计渠道");
115 HSSFCell cell_4_2=row_4.createCell(1);
116 cell_4_2.setCellStyle(style_left);
117 cell_4_2.setCellValue("全部");
118 //创建第5行
119 sheet.addMergedRegion(new CellRangeAddress(4,4,0,11));
120 HSSFRow row_5=sheet.createRow(4);
121 //创建第6行和第7行
122 sheet.addMergedRegion(new CellRangeAddress(5,6,0,1));//一级业务
123 sheet.addMergedRegion(new CellRangeAddress(5,6,2,3));//二级业务
124 sheet.addMergedRegion(new CellRangeAddress(5,5,4,5));//成功数
125 sheet.addMergedRegion(new CellRangeAddress(5,5,6,7));//失败数
126 sheet.addMergedRegion(new CellRangeAddress(5,5,8,9));//成功金额
127 sheet.addMergedRegion(new CellRangeAddress(5,5,10,11));//失败金额
128 HSSFRow row_6=sheet.createRow(5);
129 HSSFRow row_7=sheet.createRow(6);
130 //一级业务
131 HSSFCell cell_6_1=row_6.createCell(0);
132 cell_6_1.setCellStyle(style);
133 cell_6_1.setCellValue("一级业务");
134 //二级业务
135 HSSFCell cell_6_2=row_6.createCell(2);
136 cell_6_2.setCellStyle(style);
137 cell_6_2.setCellValue("二级业务");
138 //成功数
139 HSSFCell cell_6_3=row_6.createCell(4);
140 cell_6_3.setCellStyle(style);
141 cell_6_3.setCellValue("成功数");
142 //单位个人
143 HSSFCell cell_7_1=row_7.createCell(4);
144 cell_7_1.setCellStyle(style);
145 cell_7_1.setCellValue("单位");
146 HSSFCell cell_7_2=row_7.createCell(5);
147 cell_7_2.setCellStyle(style);
148 cell_7_2.setCellValue("个人");
149 //失败数
150 HSSFCell cell_6_4=row_6.createCell(6);
151 cell_6_4.setCellStyle(style);
152 cell_6_4.setCellValue("失败数");
153 //单位个人
154 HSSFCell cell_7_3=row_7.createCell(6);
155 cell_7_3.setCellStyle(style);
156 cell_7_3.setCellValue("单位");
157 HSSFCell cell_7_4=row_7.createCell(7);
158 cell_7_4.setCellStyle(style);
159 cell_7_4.setCellValue("个人");
160 //成功金额
161 HSSFCell cell_6_5=row_6.createCell(8);
162 cell_6_5.setCellStyle(style);
163 cell_6_5.setCellValue("成功金额");
164 //单位个人
165 HSSFCell cell_7_5=row_7.createCell(8);
166 cell_7_5.setCellStyle(style);
167 cell_7_5.setCellValue("单位");
168 HSSFCell cell_7_6=row_7.createCell(9);
169 cell_7_6.setCellStyle(style);
170 cell_7_6.setCellValue("个人");
171 //失败金额
172 HSSFCell cell_6_6=row_6.createCell(10);
173 cell_6_6.setCellStyle(style);
174 cell_6_6.setCellValue("失败金额");
175 //单位个人
176 HSSFCell cell_7_7=row_7.createCell(10);
177 cell_7_7.setCellStyle(style);
178 cell_7_7.setCellValue("单位");
179 HSSFCell cell_7_8=row_7.createCell(11);
180 cell_7_8.setCellStyle(style);
181 cell_7_8.setCellValue("个人");
182
183
184 //循环处理数据
185 int rowIndex=7;
186 int dataCount=7;
187 for(int i=0;i<10;i++,rowIndex++){
188 dataCount++;
189 //创建新的行
190 HSSFRow row_index=sheet.createRow(rowIndex);
191 HSSFCell cell_1=row_index.createCell(0);
192 cell_1.setCellStyle(style);
193 cell_1.setCellValue("世博支行");
194 for(int j=1;j<12;j++){
195 HSSFCell cell=row_index.createCell(j);
196 cell.setCellStyle(style);
197 cell.setCellValue("100");
198 }
199 }
200
201 //合计统计
202 HSSFRow row_total=sheet.createRow(rowIndex);
203 HSSFCell cell_total=row_total.createCell(0);
204 cell_total.setCellStyle(style);
205 cell_total.setCellValue("合计");
206 for(int i=0;i<arr.length;i++){
207 HSSFCell cell=row_total.createCell(i+1);
208 cell.setCellStyle(style);
209 //开始统计
210 cell.setCellType(Cell.CELL_TYPE_FORMULA);
211 cell.setCellFormula(getSumStr(arr[i],8,dataCount));//计算公式
212 System.out.println(getSumStr(arr[i],8,dataCount));
213 //创建poi计算器
214 FormulaEvaluator evaluator = workBook.getCreationHelper().createFormulaEvaluator();
215 evaluator.evaluateFormulaCell(cell);
216 CellValue cellValue = evaluator.evaluate(cell);
217 }
218 //开始写入文件： 定义你需要的输出流
219 workBook.setSheetName(0,"企业网银关键业务统计报表");
220 FileOutputStream fileOut =new FileOutputStream("./test.xls");
221 workBook.write( fileOut );
222 }
223 /**
224 * 统计计算公式
225 * @param tagert 列标记
226 * @param begIndex 起始索引
227 * @param endIndex 终止索引
228 * @return 返回计算公式
229 */
230 public static String getSumStr(String tagert,int begIndex,int endIndex){
231 String retStr=tagert+begIndex;
232 for(int i=begIndex+1;i<=endIndex;i++ ){
233 retStr+=("+"+tagert+i);
234 }
235 return "SUM("+retStr+")";
236 }
237 }
原文地址：https://www.cnblogs.com/newwind/p/9510834.html
时间： 2024-08-29 06:42:45