java - 如何在java中的循环中动态更改方法名称

Question

我有一个 bean 类，我想在循环中获取 MediaContentType0、MediaContentType1、MediaContentType2、MediaContentType3我得到了 json 字符串并使用 gson 将其转换为 java 类

       Gson gson=new Gson();
    CommonBean commonBean=gson.fromJson("JsonString",CommonBean.class)
    for(int i=0;i<numberOfMedia;i++)
            {
     commonBean.getMediaUrl0();
    commonBean.getMediaUrl1();
  commonBean.getMediaUrl2();
  //but i want it to fetch dynamically by iTh element.
 like-
 commonBean.getMediaUrl+i+();

这怎么可能？请建议。谢谢

mybean class is following :- 
public class CommonBean {
public String to;
public String from;
public String body;
public String numMedia;
public String MediaContentType0 ;
public String MediaContentType1 ;
public String MediaContentType2 ;
public String MediaContentType3;
public String getTo() {
    return to;
}
public void setTo(String to) {
    this.to = to;
}

public String getFrom() {
    return from;
}
public void setFrom(String from) {
    this.from = from;
}
public String getBody() {
    return body;
}
public void setBody(String body) {
    this.body = body;
}
public String getNumMedia() {
    return numMedia;
}
public void setNumMedia(String numMedia) {
    this.numMedia = numMedia;
}
public String getMediaContentType0() {
    return MediaContentType0;
}
public void setMediaContentType0(String mediaContentType0) {
    MediaContentType0 = mediaContentType0;
}
public String getMediaContentType1() {
    return MediaContentType1;
}
public void setMediaContentType1(String mediaContentType1) {
    MediaContentType1 = mediaContentType1;
}
public String getMediaContentType2() {
    return MediaContentType2;
}
public void setMediaContentType2(String mediaContentType2) {
    MediaContentType2 = mediaContentType2;
}
public String getMediaContentType3() {
    return MediaContentType3;
}
public void setMediaContentType3(String mediaContentType3) {
    MediaContentType3 = mediaContentType3;
}
}

请建议如何使用 getter 方法动态获取这些元素？

Answer 1

您可以使用 Java Reflection API

for(int i=0;i<numberOfMedia;i++) {
  try {
    Method getterMethod = commonBean.getClass().getMethod("getMediaUrl"+i);
    getterMethod.invoke(commonBean);
  } catch(Exception e) {}
}