非常简单的应用，直接上代码。
0. 获取域的代码
/** * @author jeremysong */ public class AccessChecker { public static boolean check(Object obj, String tag) { if (obj == null || tag == null || tag.isEmpty()) { return false; } try { Class clz = obj.getClass(); // Field field = clz.getField("tags"); Field field = clz.getDeclaredField("tags"); field.setAccessible(true); String[] tags = (String[]) field.get(obj); for (String t : tags) { if (tag.equals(t)) return true; } } catch (NoSuchFieldException e) { System.out.println("指定对象无tags属性"); e.printStackTrace(); } catch (IllegalAccessException e) { System.out.println("获取不到指定对象的tags属性"); e.printStackTrace(); } return false; } }1. 测试用例
public class Worker { private String name; private String[] tags; public String getName() { return name; } public void setName(String name) { this.name = name; } public String[] getTags() { return tags; } public void setTags(String[] tags) { this.tags = tags; } } import org.junit.Assert; import org.junit.Test; public class AccessCheckerTester { @Test public void testCheck1() { Worker worker = new Worker(); worker.setName("jeremysong"); worker.setTags(new String[]{"person", "male", "developer"}); Assert.assertTrue(AccessChecker.check(worker, "person")); } @Test public void testCheck2() { Worker worker = new Worker(); worker.setName("jeremysong"); worker.setTags(new String[]{"person", "male", "developer"}); Assert.assertFalse(AccessChecker.check(worker, "teacher")); } }2. 单元测试用例执行结果
