应用注解和反射构造ext的grid需要的列模型

使用注解和反射构造ext的grid需要的列模型

注解类：

?

package xzd;import java.lang.reflect.Field;import net.sf.json.JSONArray;import net.sf.json.JSONObject;public class Dog {@FieldsAnnotation(header="姓名",hidden=1)public String name;@FieldsAnnotation(header="地址",width=150,hidden=0)public String loc;@FieldsAnnotation(header="年龄",width=70,hidden=1)public long age;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getLoc() {return loc;}public void setLoc(String loc) {this.loc = loc;}public long getAge() {return age;}public void setAge(long age) {this.age = age;}public static void main(String[] args) {JSONArray jsonArray = new JSONArray();Field[] f = Dog.class.getDeclaredFields();for(int i =0;i<f.length;i++){if(f[i].isAnnotationPresent(FieldsAnnotation.class)){FieldsAnnotation fa = f[i].getAnnotation(FieldsAnnotation.class);JSONObject jsonObject= new JSONObject();jsonObject.accumulate("header",fa.header());jsonObject.accumulate("hidden",fa.hidden()==0?true:false);jsonObject.accumulate("width",fa.width());jsonArray.add(jsonObject);}}System.out.println(jsonArray.toString());}}

?? 打印结果：

???[{"header":"姓名","hidden":false,"width":100},{"header":"地址","hidden":true,"width":150},{"header":"年龄","hidden":false,"width":70}]

另附注解学习文章 ：http://yangjunfeng.iteye.com/blog/400085