使用jxl读取excel内容，并转换成Json,用于Datagrid

一、上传excel文件，得到InputStream,由InputStream得到Jxl中的Workbook,取出内容，存到二维数组中。  

 

1、使用 Jquery Uploadify 插件（http://www.uploadify.com/ ），得到FileItem,由FileItem得到InputStream。

 

   String[][] excelContent = getExcelContent(fileItem.getInputStream());

 

2、将Excel内容存放到二维数组中。

public String[][] getExcelContent(InputStream is) {

  try {

   Workbook workBook = Workbook.getWorkbook(is);

   Sheet sheet = workBook.getSheet(0);

   int sheetColumns = sheet.getColumns();

   int sheetRows = sheet.getRows();

   // excel内容

   String[][] excelContent = new String[sheetRows][sheetColumns];

   for (int i = 0; i < sheetRows; i++) {

    for (int j = 0; j < sheetColumns; j++) {

     // 将excel值放入二维数组excelContent中

     excelContent[i][j] = sheet.getCell(j, i).getContents();

    }

   }

 

 

二、将二维数组转换成JSON(stringBuffer)格式为：[{"filed1":,"value"},{"filed2":,"value2"}]

stringBuffer = convertToJson(excelContent);

 

  拼字符串花了我很多时间

 

private static final String QUOTATION_MARKS = "\"";  //双引号

private static final String COMMA = ",";   //逗号



public StringBuffer convertToJson(String[][] srcArray) {



		StringBuffer stringBuffer = new StringBuffer();

		boolean first = true;

		stringBuffer.append("[");



		for (int i = 0; i < srcArray.length; i++) {

			String[] arrayItem = srcArray[i];

			if (!first) {

				stringBuffer.append(COMMA);

			}

			stringBuffer.append("{");



			boolean first2 = true;

			for (int j = 0; j < arrayItem.length; j++) {



				if (!first2) {

					stringBuffer.append(COMMA);

				}

				stringBuffer.append(QUOTATION_MARKS + "field" + j

						+ QUOTATION_MARKS + ":\"" + arrayItem[j]

						+ QUOTATION_MARKS);

				first2 = false;

			}

			stringBuffer.append("}");

			first = false;

		}



		stringBuffer.append("]");

		return stringBuffer;



	}

 三、生成可用于DataGrid加载的Json格式，即 {"total":n,"rows":[{"filed1":,"value"},{"filed2":,"value2"}]}。

sheetRows = excelContent.length;

sheetColumns = excelContent[0].length;

 

StringBuffer stringBuffer2 = new StringBuffer("");

stringBuffer2.append("{");

   stringBuffer2.append(QUOTATION_MARKS + "total"

     + QUOTATION_MARKS + ":" + sheetRows + COMMA

     + QUOTATION_MARKS + "rows" + QUOTATION_MARKS + ":");

   stringBuffer2.append(stringBuffer);

stringBuffer2.append("}");

 http://bbs.csdn.net/topics/390395096