Spring使用@AutoWired自动装配redisTemplate时的一个细节

今天引入了redis，起先在测试redis工具类的时候报了template未初始化的错误，提示我应当先调用 afterPropertiesSet() 方法

java.lang.IllegalArgumentException: template not initialized; call afterPropertiesSet() before using it

    at org.springframework.util.Assert.isTrue(Assert.java:92)
    at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:183)
    at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:169)
    at org.springframework.data.redis.core.AbstractOperations.execute(AbstractOperations.java:91)
    at org.springframework.data.redis.core.DefaultValueOperations.get(DefaultValueOperations.java:43)
    at cn.hy.regRecord.utils.RedisUtils.get(RedisUtils.java:94)
    at cn.hy.regRecord.test.TestOthers.testRedis(TestOthers.java:97)
    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:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:221)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)

 

在查资（bai）料（du）得知 RedisTemplate 如果是手动new了一个对象的话那就应该 afterPropertiesSet() 方法，

要么就使用 @AutoWired 注解自动装配 RedisTemplate 对象，但是更改之后报了下面这个异常

java.lang.NullPointerException
    at cn.hy.regRecord.utils.RedisUtils.get(RedisUtils.java:94)
    at cn.hy.regRecord.test.TestOthers.testRedis(TestOthers.java:97)
    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:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:221)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)

原因是我这段代码是在Junit环境测试的，测试环境如果要用到自动装配应当在类之前加上  @RunWith(SpringRunner.class)

 

@RunWith(SpringRunner.class)
@WebAppConfiguration //使用此注解后可通过AutoWired装配IOC容器本身
@ContextConfiguration(locations = {"classpath:applicationContext.xml", "classpath:dispatcherServlet-servlet.xml"})
public class TestRedis {
    @Autowired
    RedisTemplate redisTemplate;
    @Test
    public void testRedis() {
        RedisUtils redisUtils = new RedisUtils(redisTemplate);
        redisUtils.set("code", "123456", 12000);
        System.out.println("服务正在运行: "+redisUtils.get("code"));
    }
}

 

至此，整段测试代码成功运行