java开发异常Exception集锦

背景：整理开发过程中的异常问题

java.lang.Exception: No tests found matching

一般出现在新导入的工程中。在sts中通过open project的方式导入工程后，运行test用例，报No tests found matching错误。

根因是build path问题。解决方案：

1 查看jdk版本，更新到目前的版本

2 删除项目中的junit包，右键 Build Path, addLibraay, 添加Junit4，在build path中通过add library的方式添加junit

 

java.lang.Exception: No tests found matching [{ExactMatcher:fDisplayName=testMessageProducer], {ExactMatcher:fDisplayName=testMessageProducer(com.jdjr.fmq.demo.ProducerTest)], {LeadingIdentifierMatcher:fClassName=com.jdjr.fmq.demo.ProducerTest,fLeadingIdentifier=testMessageProducer]] from org.junit.internal.requests.ClassRequest@27973e9b
    at org.junit.internal.requests.FilterRequest.getRunner(FilterRequest.java:35)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createFilteredTest(JUnit4TestLoader.java:83)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:74)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:49)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:525)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)

 

java.lang.NoSuchMethodError: org.springframework.util.ClassUtils.determineCommonAncestor

这种错误一般是jar包冲突导致的。

解决办法：根据异常查找冲突的jar包，然后点击pom文件——Dependency Hierarchy 查找相关的jar包，会看到omitted for conflict with的相关信息。在导入的jar包中exclude即可。

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>3.2.5.RELEASE</version>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework</groupId>
                    <artifactId>spring-core</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

 

 

java.lang.NoSuchMethodError: org.springframework.util.ClassUtils.determineCommonAncestor(Ljava/lang/Class;Ljava/lang/Class;)Ljava/lang/Class;
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:682)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:575)
    at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1350)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:358)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:327)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:437)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:624)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:461)
    at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:120)
    at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:60)
    at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.delegateLoading(AbstractDelegatingSmartContextLoader.java:100)
    at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.loadContext(AbstractDelegatingSmartContextLoader.java:248)
    at org.springframework.test.context.CacheAwareContextLoaderDelegate.loadContextInternal(CacheAwareContextLoaderDelegate.java:)
    at org.springframework.test.context.CacheAwareContextLoaderDelegate.loadContext(CacheAwareContextLoaderDelegate.java:91)
    at org.springframework.test.context.TestContext.getApplicationContext(TestContext.java:122)
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:109)
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:75)
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:312)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:211)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:288)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)

 

com.alibaba.fastjson.JSONException

com.alibaba.fastjson.JSONException: syntax error, expect {, actual int, pos 176
    at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:155) ~[fastjson-1.1.27.jar:na]
    at com.alibaba.fastjson.parser.deserializer.ASMJavaBeanDeserializer.deserialze(ASMJavaBeanDeserializer.java:31) ~[fastjson-1.1.27.jar:na]
    at Fastjson_ASM_ProducerPolicy_4.deserialze(Unknown Source) ~[na:na]
    at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:471) ~[fastjson-1.1.27.jar:na]
    at com.alibaba.fastjson.parser.deserializer.DefaultObjectDeserializer.parseMap(DefaultObjectDeserializer.java:239) ~[fastjson-1.1.27.jar:na]
    at com.alibaba.fastjson.parser.deserializer.MapDeserializer.deserialze(MapDeserializer.java:61) ~[fastjson-1.1.27.jar:na]
    at com.alibaba.fastjson.parser.deserializer.MapDeserializer.deserialze(MapDeserializer.java:47) ~[fastjson-1.1.27.jar:na]
    at Fastjson_ASM_TopicConfig_1.deserialze(Unknown Source) ~[na:na]
    at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:471) ~[fastjson-1.1.27.jar:na]
    at com.alibaba.fastjson.parser.deserializer.DefaultObjectDeserializer.parseMap(DefaultObjectDeserializer.java:239) ~[fastjson-1.1.27.jar:na]
    at com.alibaba.fastjson.parser.deserializer.MapDeserializer.deserialze(MapDeserializer.java:61) ~[fastjson-1.1.27.jar:na]
    at com.alibaba.fastjson.parser.deserializer.MapDeserializer.deserialze(MapDeserializer.java:47) ~[fastjson-1.1.27.jar:na]
    at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:471) ~[fastjson-1.1.27.jar:na]
    at com.alibaba.fastjson.JSON.parseObject(JSON.java:211) ~[fastjson-1.1.27.jar:na]
    at com.alibaba.fastjson.JSON.parseObject(JSON.java:166) ~[fastjson-1.1.27.jar:na]
    at com.jdjr.fmq.client.cluster.ClusterManager.updateCluster(ClusterManager.java:234) [fmq-client-core-2.2.5-SNAPSHOT.jar:na]
    at com.jdjr.fmq.client.cluster.ClusterManager.doStart(ClusterManager.java:101) [fmq-client-core-2.2.5-SNAPSHOT.jar:na]
    at com.jdjr.fmq.registry.util.Service.start(Service.java:34) [registry-util-2.2.5-SNAPSHOT.jar:na]

jar包冲突导致的，排查下jar包。

 

org.xml.sax.SAXParseException: SchemaLocation: schemaLocation 值 ' 

org.xml.sax.SAXParseException: SchemaLocation: schemaLocation 值 '      
  http://www.springframework.org/schema/jdbc <br>http://www.springframework.org/schema/jdbc/spring-jdbc.xsd  <br><br>http://www.springframework.org/schema/aop ' 必须具有偶数个 URI。

 原因：命名空间url对没有成对出现

xsi:schemaLocation属性的值由多个URI引用对组成，两个URI之间以空白符分隔。第一个URI是名称空间的名字，第二个URI给出模式文档的位置，模式处理器将从这个位置读取模式文档，该模式文档的目标名称空间必须与第一个URI相匹配。

java.lang.IllegalStateException: Failed to load ApplicationContext

 

遇到这种错误，不必慌张，主要看Cause by后面的原因

 

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shiroFilter' defined in class path resource [spring/spring-shiro.xml]: Cannot resolve reference to bean 'securityManager' while setting bean property 'securityManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'securityManager' defined in class path resource [spring/spring-shiro.xml]: Cannot resolve reference to bean 'shiroCacheManager' while setting bean property 'cacheManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'shiroCacheManager' defined in class path resource [spring/spring-shiro.xml]: Initialization of bean failed; nested exception is org.springframework.beans.FatalBeanException: Error initializing bean [shiroCacheManager]; nested exception is org.apache.shiro.cache.CacheException: org.apache.shiro.config.ConfigurationException: Unable to obtain input stream for cacheManagerConfigFile [classpath:/spring/ehcache.xml]

 

如上，标红的部分，提示找不到路径，原因是

classpath:/spring/ehcache.xml中多了一个根路径，去掉即可。