关于@Before, @After, @BeforeClass, @AfterClass

以下面的类为例子:

public class JUnitTestSample{
    @BeforeClass
    public static void setUpBeforeClass() throws Exception {

    }

    @AfterClass
    public static void tearDownAfterClass() throws Exception {

    }

    @Before
    public void setUp() throws Exception {
	
    }
    
    @After
    public void tearDown() throws Exception {

    }

    @Test
    public final void testMethod1() {

    }

    @Test
    public final void testMethod2() {
    }
}

@BeforeClass 和@AfterClass只执行一次，所以标注的方法也是static的
@Before和@After执行的次数跟你测试的方法的个数一样多，这里有testMethod1和testMethod2,所以会执行2次，
执行顺序:@BeforeClass->@Before->testMethod1-@After->@Before->testMethod2->@After->@AfterClass