JAVA 操作Excel工具类

Posted 2020-06-23 代码就是情人

　　

　　Bean转Excel对象

　　

 1 /*
 2  * 文件名：BeanToExcel.java
 3  */
 4 
 5 import java.util.ArrayList;
 6 import java.util.List;
 7 
 8 import jxl.Sheet;
 9 import jxl.write.WritableCell;
10 import jxl.write.WritableSheet;
11 import jxl.write.WriteException;
12 import jxl.write.biff.RowsExceededException;
13 
14 
15 
16 /**
17  * TODO 添加类的一句话简单描述。
18  */
19 public class BeanToExcel<T> {
20     
21     private WritableSheet wrightsheet;
22     private Sheet readSheet;
23     private List<T> beanList;
24     private Mapper<T> mapper;
25     private List<WritableCell> needChangeCells = new ArrayList<WritableCell>();
26     
27     public BeanToExcel(WritableSheet sheet, List<T> beanList, Mapper<T> mapper){
28         this.wrightsheet = sheet;
29         this.beanList = beanList;
30         this.mapper = mapper;
31     }
32     
33     public BeanToExcel(Sheet sheet, Mapper<T> mapper){
34         this.readSheet = sheet;        
35         this.mapper = mapper;
36         this.beanList = new ArrayList<T>();
37     }
38     
39     public void writeExcel() throws Exception{
40         try {
41             write();
42         } catch (RowsExceededException e) {
43             DEBUGGER.error("Failed to writeExcel", e);
44             throw e;
45         } catch (WriteException e) {
46             DEBUGGER.error("Failed to writeExcel", e);
47             throw e;
48         }
49     }
50     
51     public List<T> readBeans(){
52         for(int i=1; i<readSheet.getRows(); i++){
53             try {
54                 T bean = mapper.toBean(readSheet.getRow(i));
55                 if (bean instanceof ExcelInfo) {
56                     ((ExcelInfo) bean).setRow(i);
57                     ((ExcelInfo) bean).setReadSheet(readSheet);
58                 }
60                 if (bean != null){
61                     beanList.add(bean);
62                 }
63             } catch (ExcelException e) {
64                 needChangeCells.addAll(e.getCellList());
65             }
66         }
67         return beanList;
68     }
69     
70     protected void write() throws RowsExceededException, WriteException{
71         for(int i = 0 ; i < beanList.size(); i++){
72             T bean = beanList.get(i);
73             List<WritableCell> line = mapper.toRow(i+1, bean);
74             for(WritableCell cell : line){
75                 wrightsheet.addCell(cell);
76             }
77         }
78     }
79 
80     public List<WritableCell> getNeedChangeCells() {
81         return needChangeCells;
82     }
83     
84 }

　　

　　Excel.java

　　

 1 /*
 2  * 文件名：ExcelInfo.java
 3  */
 4 
 5 import jxl.Sheet;
 6 
 7 /**
 8  * ExcleInfo
 9  */
10 public class ExcelInfo
11 {
12     
13     private int row;
14     
15     private Sheet readSheet;
16     
17     public int getRow()
18     {
19         return row;
20     }
21     
22     public void setRow(int row)
23     {
24         this.row = row;
25     }
26     
27     public Sheet getReadSheet()
28     {
29         return readSheet;
30     }
31     
32     public void setReadSheet(Sheet readSheet)
33     {
34         this.readSheet = readSheet;
35     }
36 }

　　ExcelException.java

　　

 1 /*
 2  * 文件名：ExcelException.java
 3  */
 4 
 5 import java.util.List;
 6 
 7 import jxl.write.WritableCell;
 8 
 9 /**
10  * TODO 添加类的一句话简单描述。
11  */
12 public class ExcelException extends RuntimeException {
13 
14     private static final long serialVersionUID = -3113079946804687851L;
15     
16     public static ExcelException DEFAULT = new ExcelException("未知异常");
17     
18     private String msg;
19     private List<WritableCell> cellList; 
20 
21     public ExcelException(String msg) {
22         this.msg = msg;
23     }
24     
25     public ExcelException(String msg, List<WritableCell> cellList) {
26         this.msg = msg;
27         this.cellList = cellList;
28     }
29 
30     public ExcelException(String msg, StackTraceElement[] e, List<WritableCell> cellList) {
31         this.msg = msg;
32         this.cellList = cellList;
33         this.setStackTrace(e);
34     }
35 
36     @Override
37     public String getMessage() {
38         return this.msg;
39     }
40 
41     public List<WritableCell> getCellList() {
42         return cellList;
43     }
44 
45 }

　　Mapper.java

　　

 1 /*
 2  * 文件名：Mapper.java
 3  */
 4 
 5 import java.util.List;
 6 
 7 import jxl.Cell;
 8 import jxl.format.Colour;
 9 import jxl.write.Label;
10 import jxl.write.WritableCell;
11 import jxl.write.WritableCellFormat;
12 import jxl.write.WriteException;
13 
14 
15 /**
16  * TODO 添加类的一句话简单描述。
17  */
18 public abstract class Mapper<T> {
19     
20    22     
23     public abstract List<WritableCell> toRow(int row,T t);
24     
25     public abstract T toBean(Cell[] rowCells) throws ExcelException;
26     
27     public WritableCell createCell(int column, int row,  String content){
28         Label label = new Label(column, row, content);
29         return label;
30     }
31     
32     public WritableCell createErrorCell(int column, int row, String content){
33         Label label = new Label(column, row, content);
34         WritableCellFormat cellFormat = new WritableCellFormat();
35         try {
36             cellFormat.setBackground(Colour.YELLOW);
37             label.setCellFormat(cellFormat);
38         } catch (WriteException e) {
39             DEBUGGER.error("Failed to createErrorCell", e);
40         }
41         return label;
42     }47 }