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執(zhí)行Bach()操作報(bào)空指針異常

@Test
public?void?Batch(){
????Displacementinfor?displacementinfor?=?new?Displacementinfor();
????displacementinfor.setEquipname("趨勢(shì)GNSS高精定位儀");
????displacementinfor.setLongitude(102.123456f);

????Displacementinfor?displacementinfor1?=?new?Displacementinfor();
????displacementinfor.setEquipname("大趨勢(shì)");
????displacementinfor.setLongitude(34.123456f);

????List<Displacementinfor>?displacementinfors?=?Arrays.asList(displacementinfor,?displacementinfor1);
????boolean?saveBatch?=?displacementinforService.saveBatch(displacementinfors);
????System.out.println(displacementinforService);

}

java.lang.NullPointerException

at com.laoyi.pandmonitor05.DisplacementinforInsertTest.Batch(DisplacementinforInsertTest.java:46)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)

at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)

at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)

at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)

at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)

at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)

at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)

weixin_慕沐0534232

2021-12-14

源自：MyBatis-Plus入門 7-1

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1 回答

霜花似雪
2022-09-05

@Test
public?void?Batch(){
????Displacementinfor?displacementinfor?=?new?Displacementinfor();
????displacementinfor.setEquipname("趨勢(shì)GNSS高精定位儀");
????displacementinfor.setLongitude(102.123456f);

????Displacementinfor?displacementinfor1?=?new?Displacementinfor();
????displacementinfor1.setEquipname("大趨勢(shì)");
????displacementinfor1.setLongitude(34.123456f);

????List<Displacementinfor>?displacementinfors?=?Arrays.asList(displacementinfor,?displacementinfor1);
????boolean?saveBatch?=?displacementinforService.saveBatch(displacementinfors);
????System.out.println(displacementinforService);

}