請問為什么我這個testUserDAOImpl總是報空指針異常？代碼都對著，數(shù)據(jù)庫也有這條數(shù)據(jù)
二月 24, 2017 3:45:35 下午 org.hibernate.hql.internal.ast.HqlSqlWalker generatePositionalParameter
WARN: [DEPRECATION] Encountered positional parameter near line 1, column 49. ?Positional parameter are considered deprecated; use named parameters or JPA-style positional parameters instead.
Hibernate:?
? ? select
? ? ? ? users0_.UID as UID1_1_,
? ? ? ? users0_.USERNAME as USERNAME2_1_,
? ? ? ? users0_.PASSWORD as PASSWORD3_1_?
? ? from
? ? ? ? USERS users0_?
? ? where
? ? ? ? users0_.USERNAME=??
? ? ? ? and users0_.PASSWORD=?
java.lang.NullPointerException
at service.impl.UserDAOImpl.UserLogin(UserDAOImpl.java:26)
at service.impl.TestUserDAOImpl.testUserDAOImpl(TestUserDAOImpl.java:14)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
2018-04-17
我也是這樣，樓主您解決了嗎
2017-03-02
hql = "from Users where username=:username and password=:password ";
Query query = session.createQuery(hql);
query.setParameter("username", u.getUsername());
query.setParameter("password", u.getPassword());