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;
}