JAVA 操作Excel工具类

　　

　　Bean转Excel对象

　　

 /*
  * 文件名：BeanToExcel.java
  */

 import java.util.ArrayList;
 import java.util.List;

 import jxl.Sheet;
 import jxl.write.WritableCell;
 import jxl.write.WritableSheet;
 import jxl.write.WriteException;
 import jxl.write.biff.RowsExceededException;

 /**
  * TODO 添加类的一句话简单描述。
  */
 public class BeanToExcel<T> {

     private WritableSheet wrightsheet;
     private Sheet readSheet;
     private List<T> beanList;
     private Mapper<T> mapper;
     private List<WritableCell> needChangeCells = new ArrayList<WritableCell>();

     public BeanToExcel(WritableSheet sheet, List<T> beanList, Mapper<T> mapper){
         this.wrightsheet = sheet;
         this.beanList = beanList;
         this.mapper = mapper;
     }

     public BeanToExcel(Sheet sheet, Mapper<T> mapper){
         this.readSheet = sheet;
         this.mapper = mapper;
         this.beanList = new ArrayList<T>();
     }

     public void writeExcel() throws Exception{
         try {
             write();
         } catch (RowsExceededException e) {
             DEBUGGER.error("Failed to writeExcel", e);
             throw e;
         } catch (WriteException e) {
             DEBUGGER.error("Failed to writeExcel", e);
             throw e;
         }
     }

     public List<T> readBeans(){
         for(int i=1; i<readSheet.getRows(); i++){
             try {
                 T bean = mapper.toBean(readSheet.getRow(i));
                 if (bean instanceof ExcelInfo) {
                     ((ExcelInfo) bean).setRow(i);
                     ((ExcelInfo) bean).setReadSheet(readSheet);
                 }
                 if (bean != null){
                     beanList.add(bean);
                 }
             } catch (ExcelException e) {
                 needChangeCells.addAll(e.getCellList());
             }
         }
         return beanList;
     }

     protected void write() throws RowsExceededException, WriteException{
         for(int i = 0 ; i < beanList.size(); i++){
             T bean = beanList.get(i);
             List<WritableCell> line = mapper.toRow(i+1, bean);
             for(WritableCell cell : line){
                 wrightsheet.addCell(cell);
             }
         }
     }

     public List<WritableCell> getNeedChangeCells() {
         return needChangeCells;
     }

 }

　　

　　Excel.java

　　

 /*
  * 文件名：ExcelInfo.java
  */

 import jxl.Sheet;

 /**
  * ExcleInfo
  */
 public class ExcelInfo
 {

     private int row;

     private Sheet readSheet;

     public int getRow()
     {
         return row;
     }

     public void setRow(int row)
     {
         this.row = row;
     }

     public Sheet getReadSheet()
     {
         return readSheet;
     }

     public void setReadSheet(Sheet readSheet)
     {
         this.readSheet = readSheet;
     }
 }

　　ExcelException.java

　　

 /*
  * 文件名：ExcelException.java
  */

 import java.util.List;

 import jxl.write.WritableCell;

 /**
  * TODO 添加类的一句话简单描述。
  */
 public class ExcelException extends RuntimeException {

     private static final long serialVersionUID = -3113079946804687851L;

     public static ExcelException DEFAULT = new ExcelException("未知异常");

     private String msg;
     private List<WritableCell> cellList; 

     public ExcelException(String msg) {
         this.msg = msg;
     }

     public ExcelException(String msg, List<WritableCell> cellList) {
         this.msg = msg;
         this.cellList = cellList;
     }

     public ExcelException(String msg, StackTraceElement[] e, List<WritableCell> cellList) {
         this.msg = msg;
         this.cellList = cellList;
         this.setStackTrace(e);
     }

     @Override
     public String getMessage() {
         return this.msg;
     }

     public List<WritableCell> getCellList() {
         return cellList;
     }

 }

　　Mapper.java

　　

 /*
  * 文件名：Mapper.java
  */

 import java.util.List;

 import jxl.Cell;
 import jxl.format.Colour;
 import jxl.write.Label;
 import jxl.write.WritableCell;
 import jxl.write.WritableCellFormat;
 import jxl.write.WriteException;

 /**
  * TODO 添加类的一句话简单描述。
  */
 public abstract class Mapper<T> {

     public abstract List<WritableCell> toRow(int row,T t);

     public abstract T toBean(Cell[] rowCells) throws ExcelException;

     public WritableCell createCell(int column, int row,  String content){
         Label label = new Label(column, row, content);
         return label;
     }

     public WritableCell createErrorCell(int column, int row, String content){
         Label label = new Label(column, row, content);
         WritableCellFormat cellFormat = new WritableCellFormat();
         try {
             cellFormat.setBackground(Colour.YELLOW);
             label.setCellFormat(cellFormat);
         } catch (WriteException e) {
             DEBUGGER.error("Failed to createErrorCell", e);
         }
         return label;
     } }