如何在java中动态传递方法名称 [英] How to pass method name dynamically in java

问题描述

我有一个如下所示的类

public class Test
{
     private Long id;
     private Long locationId;
     private Long anotherId;

    public Long getId() {
    return id;
}


public void setId(Long id) {
    this.id = id;
}


public Long getLocationId() {
    return locationId;
}


public void setLocationId(Long locationId) {
    this.locationId = locationId;
}


public Long getAnotherId() {
    return anotherId;
}


public void setAnotherId(Long anotherId) {
    this.anotherId = anotherId;
}
}

我在各个地方使用了以下方法通过使用 id、locationId 或 anotherId 来查找匹配的对象

I have used following methods in various places to find the matched object by using id,locationId or anotherId

public Test getMatchedObject(List<Test> list,Long id )
{

          for(Test vo : list)
                if(vo.getId() != null && vo.getId().longValue() == id.longValue())
                return vo;
}

public Test getMatchedLocationVO(List<Test> list,Long locationId )
{

          for(Test vo : list)
                if(vo.getLocationId() != null && vo.getLocationId().longValue() == locationId.longValue())
                return vo;
}

public Test getMatchedAnotherVO(List<Test> list,Long anotherId )
{

          for(Test vo : list)
                if(vo.getAnotherId() != null && vo.getAnotherId().longValue() == anotherId.longValue())
                return vo;
}

我对每个参数使用不同的方法来找出对象.有什么办法可以动态传递方法名称?

I used different method for each parameter to find out the object.Is there any way i can pass method name dynamically?

提前致谢...

推荐答案

你需要使用反射来做到这一点.

You need to use reflection to do this.

import java.lang.reflect.*;

Method method = obj.getClass().getMethod(methodName);

然后用 method.invoke(obj, arg1, arg2);

这有点类似于 javascript 中调用的工作方式(如果您熟悉它的话)，除了不是传递上下文，而是传递对象及其方法的引用.

This is somewhat similar to the way call works in javascript (if you're familiar with that), except instead of passing the context, you're passing the object and a reference to it's method.

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