把数据导入到本地的EXcel中和读取本地的EXCEL到list中

public class TestCaseManager{
      public static final String title_caseID="测试例ID";
      public static final String title_caseName="测试名";
      public static final String title_testResult="测试结果";
      public static final String title_testTime ="测试通过时间";
      public static final String [] titles= new String[]{title_caseID,title_caseName,title_testResult,title_testTime };
    public static void generExcel(List<TestCase> list , String path){
    File file = new File (path);
    if(!file.exists()){
           createExcel(list,path);
              }else{
              List <TestCase> list2 readExcel(path);
              int listNumber list2.size();
             for(int i=0;i<listNumber;i++){
                      TestCase testcase =list2.get(i);
                          list.add(testcase);  
                      }
                       createExcel(list,path);
                   }
    }
      public static void createExcel(List<TestCase> list ,String path){
         HSSFWorkbook workbook = new HSSFWorkbook();
         Format format = new SimpleDateFormat("yyyy-MM-dd");
         String sheetName = format.format(new Date());
         HSSFSheet sheet = workbook.createSheet(sheetName);
         HSSFRow row =sheet.create
        }
    public static List<TestCase> readExcel(String path){

     }
}