使用jxl.jar操作Excel

在工程的build path中添加jxl.jar，网址：http://www.andykhan.com/jexcelapi/

 import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import jxl.Workbook;
 import jxl.write.Label;
 import jxl.write.WritableSheet;
 import jxl.write.WritableWorkbook;

 /**
  * 将错误码的描述信息导入到表格中
  */
 public class ErrorsToExcel {
     //错误码文件的默认编码格式
     private String defaultEncoding = "gb2312";

     private String errorsXls = "errorMessage_batch_template.xls";
     private String errorsSrcFile = "error-messages.properties";

     //写入错误码的列
     private int errorCodeIndex = 1;
     //要写入错误描述的表格的列
     private int[] errorDescIndexs = {5,6};

     /**
      * 将错误码的相关数据写入到给定的Excel中
      */
     public boolean appendErrorsToXls(){
         boolean flag = true;

         Workbook book = null;
         WritableWorkbook writableWorkbook = null;

         try{
             File excelFile = new File(errorsXls);
             if(!excelFile.exists()){
                 System.out.println("要导入的Excel模板不存在");
                 return false;
             }

             //获取可写入的Excel对象
             book = Workbook.getWorkbook(excelFile);
             writableWorkbook = Workbook.createWorkbook(excelFile, book);

             //获取可写入的表格对象
             WritableSheet targetSheet = writableWorkbook.getSheet(0);

             //添加数据
             if(!appendDataToSheet(targetSheet))
                 flag = false;

             //将表格中的数据写入Excel中
             writableWorkbook.write();

         }catch(Exception e){
             System.out.println("将错误码放到Excel时出错");
             flag = false;
         }finally{
             if(book!=null){
                 book.close();
             }
             if(writableWorkbook!=null){
                 try {
                     writableWorkbook.close();
                 } catch (Exception e) {
                     e.printStackTrace();
                 }
             }
         }

         return flag;
     }

     /**
      * 将数据写入到表格Sheet中
      *
      * @param targetSheet 要写入数据的表格
      * @return true表示写入成功  false表示失败
      * @throws IOException
      */
     private boolean appendDataToSheet(WritableSheet targetSheet) throws IOException{
         boolean flag = true;
         File file = null;

         file = new File(errorsSrcFile);

         if(!file.exists()){
             System.out.println("错误码源文件不存在");
             return false;
         }

         //进行编码格式的转换
         InputStreamReader streamReader = new InputStreamReader(new FileInputStream(file), defaultEncoding);
         BufferedReader reader = new BufferedReader(streamReader);
         String nextLine = "";

         int row = 1;

         //处理格式
         while((nextLine=reader.readLine())!=null){
             String[] codeDescs = nextLine.split("=");
             if(codeDescs.length<=1){    //非错误码内容行
                 continue;
             }

             try{
                 //插入错误码单元格
                 Label codeLabel = generateLabel(errorCodeIndex-1, row, codeDescs[0]);
                 targetSheet.addCell(codeLabel);

                 //插入描述信息单元格
                 for(int j=0; j<errorDescIndexs.length; ++j ){
                     Label descLabel = generateLabel(errorDescIndexs[j]-1, row, codeDescs[1]);
                     targetSheet.addCell(descLabel);
                 }
             }catch(Exception e){
                 System.out.println("插入单元格信息出错");
             }

             row++;
         }

         return flag;
     }

     private Label generateLabel(int col, int row, String contents){
         //Label的构造函数中是列序号在前，行序号在后
         return new Label(col, row, contents);
     }

     public String getErrorsXls() {
         return errorsXls;
     }
     public void setErrorsXls(String errorsXls) {
         this.errorsXls = errorsXls;
     }
     public String getErrorsSrcFile() {
         return errorsSrcFile;
     }
     public void setErrorsSrcFile(String errorsSrcFile) {
         this.errorsSrcFile = errorsSrcFile;
     }

     public static void main(String[] args){
         ErrorsToExcel transformer = new ErrorsToExcel();

         if(transformer.appendErrorsToXls()){
             System.out.println("导入Excel成功");
         }else{
             System.out.println("导入Excel失败");
         }
     }
 }

遇到的奇葩问题：

在Java工程中使用jxl时，一切正常。但是，日后将相应文件迁移到Spring MVC环境中使用时（且将jxl.jar加到了工程的build path中），但是加载工程时，每次调用到使用jxl的类时，都会报错jxl/write/writableCell类不存在；

解决方式：将jxl.jar放到WEB-INF/lib下解决；