自定义Junit运行器，运行前和运行后

import org.junit.runners.BlockJUnit4ClassRunner;
import org.junit.runners.model.FrameworkMethod;
import org.junit.runners.model.InitializationError;
import org.junit.runners.model.Statement;

public class CustomRunner extends BlockJUnit4ClassRunner {

    public CustomRunner(Class<?> klass) throws InitializationError {
        super(klass);
    }

    @Override
    protected Statement withBefores(FrameworkMethod method, Object target, Statement statement) {
        return new Statement() {
            @Override
            public void evaluate() throws Throwable {
                // 运行前执行的操作
                System.out.println("运行前执行的操作");

                statement.evaluate();
            }
        };
    }

    @Override
    protected Statement withAfters(FrameworkMethod method, Object target, Statement statement) {
        return new Statement() {
            @Override
            public void evaluate() throws Throwable {
                statement.evaluate();

                // 运行后执行的操作
                System.out.println("运行后执行的操作");
            }
        };
    }
}

@RunWith(CustomRunner.class)
public class MyTest {
    // 测试方法...
}