Replace Method

这是一个Spring提供的可以对指定Bean的方法进行替换的功能。
待替换类的方法：

public class MyValueCalculator {

    public String computeValue(String input) {
        // some real code...
    }

    // some other methods...
}

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替换成的方法，需要实现MethodReplacer接口：

public class ReplacementComputeValue implements MethodReplacer {

    public Object reimplement(Object o, Method m, Object[] args) throws Throwable {
        // get the input value, work with it, and return a computed result
        String input = (String) args[0];
        ...
        return ...;
    }
}

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通过xml注入到目标类：

<bean id="myValueCalculator" class="x.y.z.MyValueCalculator">
    <!-- arbitrary method replacement -->
    <replaced-method name="computeValue" replacer="replacementComputeValue">
        <arg-type>String</arg-type>
    </replaced-method>
</bean>

<bean id="replacementComputeValue" class="a.b.c.ReplacementComputeValue"/>

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编辑

#BeanDefinition #Replace Method

上次更新: 2023/04/09, 16:34:32

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