java - 避免代码重复——最好的方法

Question

我有两个方法，它们具有相同的列表和参数类型以及几乎相同的主体，但每个方法都调用另一个函数来获取元素列表。更准确地说:

    public void method1 (int a, int b) {
            //body (the same in both of methods)
            List<SomeObject> list = service.getListA(int c, int d);
            //rest of the body (the same in both of methods)
        }

        public void method2 (int a, int b) {
            //body (the same in both of methods)
            List<SomeObject> list = service.getListB(int c, int d, int e);
            //rest of the body (the same in both of methods)
        }

在这种情况下，避免代码重复的最佳方法是什么？我考虑过策略模式，但参数列表存在差异。

更新:

    public void method1 (int a, int b) {
            //body (the same in both of methods)
            int c = some_value;
            List<SomeObject> list = service.getListA(a, b, c);
            //rest of the body (the same in both of methods)
        }

        public void method2 (int a, int b) {
            //body (the same in both of methods)
            int c = some_value;
            int d = another_value;
            List<SomeObject> list = service.getListB(a, b, c, d);
            //rest of the body (the same in both of methods)
        }

所以有些变量是局部的，有些是通过参数传递的。

Answer 1

将它们分解为其他方法。

public void method1 (int a, int b) {
        MyClass myClass = method3(a, b);
        List<SomeObject> list = service.getListA(myClass.getC(), myClass.getD());
        method4(list);
}

public void method2 (int a, int b) {
        MyClass myClass = method3(a, b);
        List<SomeObject> list = service.getListB(myClass.getC(), myClass.getD(), myClass.getE());
        method4(list);
}

public MyClass {
    private final int c;
    private final int d;
    private final int e;
    ...
}

public MyClass method3(int a, int b) {
    // body
    return new MyClass(c, d, e)
}

public void method4(List<SomeObject> list) {
    // rest of body
}