动态将BEAN中的数据装到数据库

 

//将BEAN装到数据库中

public static void beanToResultset(Object databaseBean,  java.sql.PreparedStatement stmt)
  throws Exception {
  stmtNo = 1;
  try {

   //得到类或接口的单个字段的信息，以及对它的动态访问权限

    java.lang.reflect.Field[] declaredField = databaseBean.getClass().getDeclaredFields();

   //将BEAN中的数据放到数据中

    executeBeanToDB(declaredField , databaseBean , stmt);
   declaredField = null;
   java.lang.reflect.Field[] declaredSuperField = databaseBean.getClass().getSuperclass().getDeclaredFields();

   //将BEAN中的数据放到数据中

    executeBeanToDB(declaredSuperField , databaseBean , stmt);
   declaredSuperField = null;
  } catch (Exception e) {
     throw e;
  }
 }

private static void executeBeanToDB(java.lang.reflect.Field[] declaredField , Object databaseBean,  java.sql.PreparedStatement stmt) throws Exception{
  String fieldType = null;
  String fieldName = null;  
  for (int i = 0; i < declaredField.length; ++i) {

   //判断信息中是否有方法

    if (declaredField[i].getType().getName().equals("java.lang.Class"))
   continue; 

   //得到方法类型

      fieldType = declaredField[i].getType().getName();

   //得到方法名

    fieldName = declaredField[i].getName();

   //将BEAN中的数据装到数据库中

    beanValueToResultset(
    fieldType,
      getGetterMethodValue(fieldType,getGetterMethodName(fieldName),databaseBean  ),
      stmt
    );
  }
 }

//运行GET方法

public static String getGetterMethodValue(String fieldType , String methodName ,Object databaseBean) throws Exception{
  try {
   Class[] types = {};
   Object[] args = {};
   java.lang.reflect.Method m = databaseBean.getClass().getMethod(methodName, types);
   return (String)m.invoke(databaseBean, args);
  } catch (Exception e) {
   logger.error(displayExceptionMessage("HibernateBean","getGetterMethodValue",e.getMessage()));
   throw e;
  }
 }

//将GET方法得到的值装到数据库中

private static void beanValueToResultset(String fieldType, String fieldValue, java.sql.PreparedStatement stmt)throws  java.sql.SQLException {
  if (fieldType.equals("java.lang.String")) {
   stmt.setString(stmtNo,fieldValue);
   ++stmtNo;
  } else if (fieldType.equals("int")) {
   stmt.setInt(stmtNo,Integer.parseInt(fieldValue));
   ++stmtNo;   
  } else if (fieldType.equals("float")) {
   stmt.setFloat(stmtNo,Float.parseFloat(fieldValue));
   ++stmtNo;      
  } else {
   stmt.setString(stmtNo,fieldValue);
   ++stmtNo;
  }
 }

//生成GET方法

private static String getGetterMethodName(String fieldName) {
  //return "get" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1, fieldName.length());
  return "get" + fieldName;
 }