學習1-加油！

ApplicationContext：獲得spring定義的bean實例

pubilc class Test{                  
	protected static ApplicationContext context;
	protected ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws Exception {
		context = new ClassPathXmlApplicationContext("classpath:epolicy-context-task-test.xml");                                              		LinkExpiryDataJob linkExpiryDataJob = (LinkExpiryDataJob) context.getBean("linkExpiryDataJob");
	}
}

根據配置文件獲取屬性的屬性值：

public class SpringCfgPropHelper {
	
	private static Properties instance;
	private static String classpath = "/epolicy-context.properties";
	public void setClasspath(String classpath) {
		SpringCfgPropHelper.classpath = classpath;
	}
	
	private synchronized static void init() {
		//System.out.println("classpath:"+classpath);
		Resource resource = new ClassPathResource(classpath);
		try {
			instance = PropertiesLoaderUtils.loadProperties(resource);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	public static String getProperty(String key) {
		if(instance==null) {
			init();
		}
		return instance.getProperty(key);
	}
}

Calendar cal = Calendar.getInstance();     cal.add(Calendar.DATE, -1);   cal.getTime()

poi設置字體大小（來自poi官網）

    Workbook wb = new HSSFWorkbook();
    Sheet sheet = wb.createSheet("new sheet");
    // Create a row and put some cells in it. Rows are 0 based.
    Row row = sheet.createRow(1);

    // Create a new font and alter it.
    Font font = wb.createFont();
    font.setFontHeightInPoints((short)24);
    font.setFontName("Courier New");
    font.setItalic(true);
    font.setStrikeout(true);

    // Fonts are set into a style so create a new one to use.
    CellStyle style = wb.createCellStyle();
    style.setFont(font);
    HSSFDataFormat format=wb.createDataFormat();                                  
    style.setDataFormat(format.getFormat("@"));//設置文本輸出，避免將過長的數字，轉化成科學技術法
    // Create a cell and put a value in it.
    Cell cell = row.createCell(1);
    cell.setCellValue("This is a test of fonts");
    cell.setCellStyle(style);

		Map countMap = new HashMap();
		// 文件名稱配置的固定目錄+時間+文件名稱
		String fileName = localPath + fileTimestamp + "/" + Const.INTERFACE_FILE_END + fileTimestamp + ".CSV";
		BufferedReader br;
		try {
			br = new BufferedReader(new FileReader(fileName));

			String csvLine = null;
			while ((csvLine = br.readLine()) != null) {
				csvLine = csvLine.replaceAll(",", ", "); // 防止截少字段
				String[] lineData = csvLine.split(",");
				if (lineData != null && lineData.length > 1) {
					int count = -1;
					try {
						count = Integer.valueOf(this.trim(lineData[1]));
						countMap.put(this.trim(lineData[0]), count);
					} catch (NumberFormatException e) {
					} catch (Exception e) {
						//e.printStackTrace();
						logger.error(e,e.fillInStackTrace());
					}
				}
			}
		} catch (FileNotFoundException e1) {
			throw new ServiceException("獲取接口文件計數錯誤：", null, e1.fillInStackTrace());
		} catch (IOException e) {
			throw new ServiceException("獲取接口文件計數錯誤：", null, e.fillInStackTrace());
		}
		return countMap;
		//.csv格式：  string, num

//throw Exception後，程序中斷，後面代碼不再執行。
public class ThrowTest {
	public static void main(String[] args) throws Exception {
		int a=0;
		int b=0;
		if(a==b){
			throw new Exception("做個小測試而已");
		}
		System.out.println("a= "+a+"; b="+b);
	}
}

根據反射機制創建對象

Class cls=interfaceName.class;
InterfaceData obj = null;
obj = (InterfaceData) cls.newInstance();