在使用TestNG做单元测试时，需要测试的代码中出现System.exit(0)，导致单元测试还未结束程序就停止了。解决方法如下：

public class TestMain {    public static void main(String args[]) {        NoExitSecurityManager manager = new NoExitSecurityManager();        System.setSecurityManager(manager);        new TestNGApp("test/TestUtils.xml").run();        manager.exitFilter = false;        System.exit(0);    }    /**     * 拦截系统退出     */    private static class NoExitSecurityManager extends SecurityManager {        boolean exitFilter = true;        @Override        public void checkPermission(Permission perm) {        }        @Override        public void checkPermission(Permission perm, Object context) {        }        @Override        public void checkExit(int status) {            super.checkExit(status);            if (exitFilter) {                throw new ExitException(status);            }        }    }    protected static class ExitException extends SecurityException {        private static final long serialVersionUID = 1L;        public final int status;        public ExitException(int status) {            super("成功拦截System.ext(0)！");            this.status = status;        }    }}　　

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