在Struts--hibernate开发框架中，实现formbean与hibernate pojo的自动转换

来源：互联网发布：魔方软件编辑：程序博客网时间：2024/05/22 17:46

在我们实际项目开发过程中，经常有大量的对单表的基本维护。在做这一部分工作时，最耗费我们宝贵时间的就是formbean与hibernate pojo之间的转换问题了。经过一天的努力，初见成效。贴出来，让大家拍拍砖。

源代码：

import java.lang.reflect.Field;
import java.lang.reflect.Method;

/**
* Title: 
*
* Description: 
*
* Copyright: Copyright (c) 2006
*
* Company: 
*
* @author 赵志宽
* @version 1.0
*/
public class DataForm {

    /**
     * VOToForm
     *
     * @param vo Object
     * @param form Object
     * @throws ClassNotFoundException
     */
    public static void VOToForm(Object vo, Object form) throws
            ClassNotFoundException {

        Field[] voFileds;
        Field[] formFields;
        Class beanVo = vo.getClass();
        voFileds = beanVo.getFields();
        Class formData = form.getClass();
        formFields = formData.getFields();
        try {
            DataTrants(voFileds, formFields, vo, form, "0");
        } catch (Exception ex) {
            System.out.println("转换失败" + ex.getMessage());
        }
    }

    /**
     * FormToVO
     *
     * @param vo Object
     * @param form Object
     */
    public static void FormToVO(Object vo, Object form) {
        Field[] voFileds;
        Field[] formFields;
        Class beanVo = vo.getClass();
        voFileds = beanVo.getFields();
        Class formData = form.getClass();
        formFields = formData.getFields();

try {
DataTrants(voFileds, formFields, vo, form, "1");

        } catch (Exception ex) {
            System.out.println("转换失败" + ex.getMessage());
        }

}

/**
 * DataTrants
 * flag = "0" 从VO到FORM flag = "1" 从form到VO
 * @param voFileds Field[]
 * @param formFields Field[]
 */
 public static void DataTrants(Field[] voFileds, Field[] formFields,
 Object vo,
 Object form, String flag) throws
 Exception {
 String voFieldName = "";
 String formFieldName = "";
 Method m = null;
 Method v = null;
 String value = "";
 Class param[] = new Class[1];
 Class param1[] = new Class[0];
 Object[] paramValue = new Object[1];
 if (flag.equals("0")) {
 for (int i = 0; i < voFileds.length; i++) {
 voFieldName = voFileds[i].getName();
 for (int j = 0; j < formFields.length; j++) {
 formFieldName = formFields[j].getName();
 if (voFieldName.equals(formFieldName.toLowerCase())) {
 v = vo.getClass().getMethod(getMethodName("get",
 voFieldName),
 param1);
 value = String.valueOf(v.invoke(vo, param1));
 param[0] = formFields[j].getType();
 m = form.getClass().getMethod("set" +
 voFieldName.toUpperCase(), param);
 paramValue[0] = value;
 if (String.valueOf(param[0].getName()).equals(
 "java.lang.Integer")) {
 paramValue[0] = new Integer(value);
 }
 m.invoke(form, paramValue);
 }
 }
 }
 } else {
 if (flag.equals("1")) {
 for (int i = 0; i < formFields.length; i++) {
 formFieldName = formFields[i].getName();
 v = form.getClass().getMethod("get" + formFieldName, param1);
 value = String.valueOf(v.invoke(form, param1));
 param[0] = vo.getClass().getField(formFieldName.toLowerCase()).
 getType();
 m = vo.getClass().getMethod(getMethodName("set",
 formFieldName), param);
 paramValue[0] = value;
 if (String.valueOf(param[0].getName()).equals(
 "java.lang.Integer")) {
 paramValue[0] = new Integer(value);
 }
 if (String.valueOf(param[0].getName()).equals(
 "java.util.Date")) {
 int year = new Integer(value.substring(0, 2)).intValue();
 int month = new Integer(value.substring(4, 6)).intValue();
 int days = new Integer(value.substring(8, 10)).intValue();
 paramValue[0] = new java.util.Date(year, month, days);
 }
 m.invoke(vo, paramValue);
 }
 } else {
 throw new Exception("数据转换标志不对");
 }

}
}

    /**
     * getMethodName
     *
     * @param flag String
     * @param columName String
     * @return String
     */
    private static String getMethodName(String flag, String columName) {
        String pre = columName.substring(0, 1).toUpperCase();
        String next = columName.substring(1, columName.length()).toLowerCase();
        StringBuffer methodName = new StringBuffer();
        methodName.append(flag);
        methodName.append(pre);
        methodName.append(next);
        return new String(methodName);

}