SSM poi通过模板 反射导出excel

 1 import java.lang.reflect.Field;
 2 import java.lang.reflect.Method;
 3 import java.util.Iterator;
 4 import java.util.List;
 5
 6 import org.apache.poi.hssf.usermodel.HSSFCell;
 7 import org.apache.poi.hssf.usermodel.HSSFCellStyle;
 8 import org.apache.poi.hssf.usermodel.HSSFRow;
 9 import org.apache.poi.hssf.usermodel.HSSFSheet;
10 import org.apache.poi.hssf.usermodel.HSSFWorkbook;
11
12 /**
13  * Excel通用工具类
14  * @param sheetName 表格名字
15  * @param headers 表头
16  * @param columns 列(对象属性名)对应表头
17  * @param lists 数据源
18  */
19 public class ExcelUtil<T> {
20      public HSSFWorkbook export(String sheetName, String[] headers, String[] columns, List<T> lists) throws Exception {
21             HSSFWorkbook wb = new HSSFWorkbook();
22             HSSFSheet sheet = wb.createSheet(sheetName);
23             sheet.setDefaultColumnWidth(11);
24             HSSFCellStyle style = wb.createCellStyle();
25             HSSFRow row = sheet.createRow(0);
26             style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
27             style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
28             for (int i = 0; i < headers.length; i++) {
29                 HSSFCell headerCell = row.createCell(i);
30                 headerCell.setCellValue(headers[i]);
31                 headerCell.setCellStyle(style);
32             }
33             Iterator<T> it = lists.iterator();
34             int rowIndex = 0;
35             while (it.hasNext()) {
36                 rowIndex++;
37                 row = sheet.createRow(rowIndex);
38                 T t = it.next();
39                 Field[] fields = t.getClass().getDeclaredFields();
40                 for (int i = 0; i < fields.length; i++) {
41                     Field field = fields[i];
42                     String fieldName = field.getName();
43                     for (int j = 0; j < columns.length; j++) {
44                         if (fieldName.equals(columns[j])) {
45                         String getMethodName ="get"+fieldName.substring(0,1).toUpperCase()+fieldName.substring(1);
46                         Class<? extends Object> cls = t.getClass();
47                         Method getMethod = cls.getMethod(getMethodName, new Class[] {});
48                         Object val = getMethod.invoke(t, new Object[] {});
49                         String textVal = null;
50                         if (null != val) {
51                             textVal = val.toString();
52                         } else {
53                             textVal = null;
54                         }
55                         HSSFCell hssfCell=row.createCell(j);
56                         hssfCell.setCellValue(textVal);
57                         hssfCell.setCellStyle(style);
58                     }
59                 }
60             }
61         }
62         return wb;
63      }
64 }

 1 Server层
 2
 3     /**
 4      *  导出数据
 5      * @throws Exception
 6      */
 7     public HSSFWorkbook  outputExcel() throws Exception {
 8         List<Distribution> lists = mapper.selectByExample(new DistributionExample());
 9         String sheetName = "债券分销表";
10         String[] headers = {"指令日期","组合代码","组合名字","业务类型","缴款金额","缴款日期",
11                              "O32状态","是否加急","出款状态","主承状态","交收状态"};  //表头
12         String[] columns = {"instructionDate","compositeCode","combinationName","interestType",
13                              "paymentAmount","paymentDate","o32Status","urgentStatus","cashFlowStatus",
14                              "underwritingStatus","settlementState"};　　　　　　//bean 属性名 需对应表头
15         ExcelUtil<Distribution> excelUtil = new ExcelUtil<Distribution>();
16         HSSFWorkbook wb=excelUtil.export(sheetName, headers, columns, lists);
17         //FileOutputStream fos= new FileOutputStream("E://dis.xls");
18         //wb.write(fos);
19         return wb;
20     }
21     

 1 @RequestMapping(produces="application/vnd.ms-excel;charset=UTF-8",value="qwangxiao.com /downloadExcel",method = RequestMethod.GET)
 2     public void downloadExcel(HttpServletResponse response){
 3         response.addHeader("Content-Disposition","attachment; filename=\"债券分销列表.xls\"" );
 4         HSSFWorkbook wk=null;
 5         OutputStream oStream=null;
 6         try {
 7             oStream = response.getOutputStream();
 8             wk = distributionService.outputExcel();
 9             wk.write(oStream);
10         }catch (Exception e) {
11             e.printStackTrace();
12             logger.info("导出Excel表格出现异常"+e);
13         }finally {
14             if(oStream!=null){
15                 try {
16                     oStream.close();
17                 } catch (IOException e) {
18                     e.printStackTrace();
19                 }
20             }
21         }
22     }