java - 如何让类中的方法名动态化？

Question

这个问题已经有答案了:

Java dynamic function calling (2 个回答)

已关闭 9 年前。

当我从类创建对象时，我想使类中的方法名称动态化，我想动态执行方法名称，下面是我的代码。

public static void ExecuteTest() throws Exception 
{
    for (int i = 1,  j = 1;  i < 2;  i = i+1, j = j+1)  {    
            FW_ReadExcelFile N = new FW_ReadExcelFile();
            FW_ReadExcelFile.setExcelSheetEnvValues(i,i);
             //java.lang.String Flag2 = N.getTCExecuteFlag() ;

             String Flag = "YES";
             String Flag21 = N.getTCExecuteFlag();


            if ( Flag.equals(Flag21)  ){
                String TCName = N.getTCName();
                FW_Report u = new FW_Report();
                u.TCName; // the FW_Report  class has many methods and I want to call the method on my demand .
            } 

Answer 1

i want to execute the method name dynamically

使用Reflections in Java来实现这一目标。

示例代码:

        Class<?> name = Class.forName("ClassName");
        Object instance = name.newInstance();
        Method[] methods = name.getMethods();

        for (Method method : methods) {
            if (method.getName().equals(N.getTCName())) {
                // Match found. Invoke the method. call the method on my demand.
                method.invoke(instance, null);
                break;
            }
        }

或者尝试一下:

       // Get the method name at runtime
        Method method = ClassName.class.getMethod(N.getTCName(), null);
        method.invoke(new ClassName(), null);