Bean property 'dao' is not writable or has an invalid setter method. Does the parameter type of the

1号.此類錯誤的解決流程：

1.先去找到你的ApplicationContext.xml配置檔案

2.通過ApplicationContext.xml中，找到<bean id=stuService>标簽裡面的<property name="dao"> 這裡的類，通過這個類标簽找到實作類，在實作類裡面給dao的屬性添加setter 和getter方法

2号.此類錯誤的解決流程：

1.找到ApplicationContext.xml配置檔案，找到<bean name=StudentAction>這裡注釋一下就OK

錯誤提示：

1号.org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'stuService' defined in class path resource [applicationContext.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'dao' of bean class [com.baidu.service.StudentServiceImpl]: Bean property 'dao' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1493)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1197)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)

at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)

at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)

at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)

at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:703)

at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)

at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)

at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)

at com.baidu.test.Test1.testAdd(Test1.java:18)

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

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

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

at java.lang.reflect.Method.invoke(Method.java:606)

at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:59)

at org.junit.internal.runners.MethodRoadie.runTestMethod(MethodRoadie.java:98)

at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:79)

at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:87)

at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:77)

at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:42)

at org.junit.internal.runners.JUnit4ClassRunner.invokeTestMethod(JUnit4ClassRunner.java:88)

at org.junit.internal.runners.JUnit4ClassRunner.runMethods(JUnit4ClassRunner.java:51)

at org.junit.internal.runners.JUnit4ClassRunner$1.run(JUnit4ClassRunner.java:44)

at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:27)

at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:37)

at org.junit.internal.runners.JUnit4ClassRunner.run(JUnit4ClassRunner.java:42)

at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)

at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)

at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

Caused by: org.springframework.beans.NotWritablePropertyException: Invalid property 'dao' of bean class [com.baidu.service.StudentServiceImpl]: Bean property 'dao' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?

at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:1064)

at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:922)

at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:82)

at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:62)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1489)

... 35 more

2号：org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [com.baidu.action.StuAction] for bean with name 'stuAction' defined in class path resource [applicationContext.xml]; nested exception is java.lang.ClassNotFoundException: com.baidu.action.StuAction

at org.springframework.beans.factory.support.AbstractBeanFactory.resolveBeanClass(AbstractBeanFactory.java:1325)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:594)

at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1394)

at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:957)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:683)