Java-Pojo类转Flex-Vo类

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在使用openamf的类映射功能时，一般需要在as端也定义和java pojo类似的对象，用于类的映射。

有关使用openamf的类映射，请见之前的《openAMF自定义类映射(custom-class-mapping)的使用》

如果手工去写这些和java对应的flex vo对象比较麻烦，这里用java写了个简单的as vo对象生成的工具，代码如下：

/**
*
*/
package com.nstar.base.util;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.lang.reflect.Field;

import org.apache.commons.lang.StringUtils;


/**
* @author Administrator
*
*/
public class VoUtils {
public VoUtils(){}

//根据java类对象的类型返回vo类型
public static String getClassType(Class c){
   String typeName = c.getSimpleName();

   if (typeName.equals("String") || typeName.equals("Date") || typeName.equals("Boolean")) {
    return typeName;
   }else if (typeName.equals("BigDecimal") || typeName.equals("Decimal") ||
      typeName.equals("Double")) {
    return "Number";
   }else if (typeName.equals("Integer")) {
    return "int";
   }else {
    return "*";//其它类型的设置为未知类型,此处由自己去补充完善，并不建议使用"*"
   }

}
//重复c字符count次，用于格式化生成的as文件
public static String repeat(String c, int count){
   String temp = "";
   for(int i = 0;i<count ;i++){
    temp += c;
   }

   return temp;
}
/**
* 生成as文件
* @param pojoName java对象名称
* @param packageName flex中vo对象的包名
* @throws ClassNotFoundException
* @throws IOException
*/
public static void generateAsFile(String pojoName, String packageName, String folder)
    throws ClassNotFoundException, IOException {
   Class c = Class.forName(pojoName);
   Field[] fields =c.getDeclaredFields();

   //as的vo对象名称结尾加上VO标志
   File f = new File(folder+c.getSimpleName()+"VO.as");
   BufferedWriter bw = new BufferedWriter(
           new FileWriter(f));
   //包名，没有设置包名就取和java pojo一样的包名
   if (StringUtils.isEmpty(packageName)){
    bw.write("package "+c.getPackage().getName()+"\n{\n");
   }else{
    bw.write("package "+packageName+"\n{\n");
   }

   //写类
   bw.write(repeat(" ",4)+"public class "+c.getSimpleName()+"VO\n");
   bw.write(repeat(" ",4)+"{\n");

   //写属性
   for(int i=0;i<fields.length;i++){
    Class fieldType = fields[i].getType();
    String typeName = getClassType(fieldType);
    bw.write(repeat(" ",8)+"private var _"+fields[i].getName()+":"+typeName+";\n");
   }

   bw.write("\n\n\n");
   //写空的构造函数
   bw.write(repeat(" ",8)+"public function "+c.getSimpleName()+"VO(){}\n\n");

   //写 setter/getter 方法
   for(int i=0;i<fields.length;i++){
    Class fieldType = fields[i].getType();
    String typeName = getClassType(fieldType);
    //setter
    bw.write(repeat(" ",8)+"public function set "+fields[i].getName()+"(value:"+typeName+"):void{\n");
    bw.write(repeat(" ",12)+"this._"+fields[i].getName()+" = value;\n");
    bw.write(repeat(" ",8)+"}\n\n");
    //getter
    bw.write(repeat(" ",8)+"public function get "+fields[i].getName()+"():"+typeName+"{\n");
    bw.write(repeat(" ",12)+"return this._"+fields[i].getName()+";\n");
    bw.write(repeat(" ",8)+"}\n\n\n");

   }
   bw.write(repeat(" ",4)+"}\n");
   bw.write("}");
   bw.close();  
}

//测试，写了个测试
public static void main(String[] args) throws ClassNotFoundException, IOException {
   // TODO Auto-generated method stub
   String[] pojos = {
     "com.nstar.model.orderexpress.Area",
     "com.nstar.model.orderexpress.FoodType",
     "com.nstar.model.orderexpress.Holiday",
     "com.nstar.model.orderexpress.ItemSpec",
     "com.nstar.model.orderexpress.ItemSpecType",
     "com.nstar.model.orderexpress.Menu2Rest",
     "com.nstar.model.orderexpress.OrderInfo",
     "com.nstar.model.orderexpress.OrderInfoExp",
     "com.nstar.model.orderexpress.OrderMenu",
     "com.nstar.model.orderexpress.OrderState",
     "com.nstar.model.orderexpress.OrderType",
     "com.nstar.model.orderexpress.Repository",
     "com.nstar.model.orderexpress.RepositoryType",
     "com.nstar.model.orderexpress.RestInfo",
     "com.nstar.model.orderexpress.UserInfo",
     "com.nstar.model.orderexpress.UserLevel",
     "com.nstar.model.orderexpress.UserType"
     };
   for(int i=0;i<pojos.length;i++){
    //Class c = Class.forName(pojos[i]);
    //System.out.println("registerClassAlias('"+pojos[i]+"',com.nstar.orderexpress.vo."+c.getSimpleName()+"VO);");
    VoUtils.generateAsFile(pojos[i],"com.nstar.orderexpress.vo","C:/temp/");
   }

}

}

测试时可以随便找个Java对象来测试，下面是其中生成的一个文件(OrderTypeVO)的内容：

package com.nstar.orderexpress.vo
{
    public class OrderTypeVO
    {
        private var _orderTypeId:String;
        private var _name:String;
        private var _remarks:String;

        public function OrderTypeVO(){}

        public function set orderTypeId(value:String):void{
            this._orderTypeId = value;
        }

        public function get orderTypeId():String{
            return this._orderTypeId;
        }


        public function set name(value:String):void{
            this._name = value;
        }

        public function get name():String{
            return this._name;
        }


        public function set remarks(value:String):void{
            this._remarks = value;
        }

        public function get remarks():String{
            return this._remarks;
        }


    }
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本文是转载自网友的，我们自己可以在此基础上做一些修改使其成为我们的工具类。其实这种做法之前在写Mysql部分的监控时也曾用到了。[/size]