@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface Test {

}

public class UserTest {
	
	@Test
	public void testInsert() {
		User user = null;
		System.out.println(user.getUsername());
	}
	
	@Test
	public void testQuery() {
		Blog b = new Blog();
		b.setTips(new String[] {"技術(shù)","java","多線程"});
		String[] tips = b.getTips();
		System.out.println(tips[3]);
	}
	
	@Test
	public void divide() {
		System.out.println(10/0);
	}
	

}

public static void main(String[] args) {
		BufferedWriter bw = null;
		try {
			//記錄方法總數(shù)
			int methodCount = 0;
			//記錄錯(cuò)誤方法總數(shù)
			int expCount = 0;
			//準(zhǔn)備一個(gè)文件輸出流，用于記錄程序執(zhí)行過程中的異常信息
			bw = new BufferedWriter(new FileWriter("log.txt"));
			// 獲取類的Class對(duì)象
			Class clz = UserTest.class;
			//創(chuàng)建目標(biāo)類型的實(shí)例對(duì)象
			Object obj = clz.newInstance();
			//獲取所有的方法對(duì)象
			Method[] methods = clz.getMethods();
			for (Method m : methods) {
				if(m.isAnnotationPresent(Test.class)) {
					//統(tǒng)計(jì)總共有多少方法需要被測試
					methodCount++;
				}
			}
			bw.write("測試方法總數(shù)：" + methodCount);
			bw.newLine();
			bw.write("================================");
			bw.newLine();
			for (Method m : methods) {
				try {
					//如果方法上面包含了Test注解則作為測試方法進(jìn)行測試
					if(m.isAnnotationPresent(Test.class)) {
						m.invoke(obj);
					}
				} catch (Exception e) {
					//異常方法計(jì)數(shù)器遞增
					expCount++;
					bw.write(m.getName() + "出現(xiàn)異常");
					bw.newLine();
					bw.write("類型：" + e.getCause().getClass());
					bw.newLine();
					bw.write("原因：" + e.getCause().getMessage());
					bw.newLine();
					bw.write("================================");
					bw.newLine();
				}
			}
			bw.write("錯(cuò)誤方法總數(shù)：" + expCount);
			bw.newLine();
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			try {
				if(bw != null) {
					bw.flush();
					bw.close();
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}