异常：Caused by: java.lang.NoClassDefFoundError: Could not initialize class net.sf.log4jdbc.Properties
参考文章：
使用Log4jdbc-log4j2监听MyBatis中运行的SQL和Connection
使用 log4jdbc格式化输出SQL，maven配置如下：
<dependency>
<groupId>org.bgee.log4jdbc-log4j2</groupId>
<artifactId>log4jdbc-log4j2-jdbc4</artifactId>
<version>1.16</version>
</dependency>
datasouce.xml配置如下：
<!-- DataSource -->
<bean id="dataSourceSpied" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${db.driver}"></property>
<property name="url" value="${db.url}"></property>
<property name="username" value="${db.username}"></property>
<property name="password" value="${db.password}"></property>
</bean>
<!-- log4jdbc -->
<bean id="dataSource" class="net.sf.log4jdbc.sql.jdbcapi.DataSourceSpy">
<constructor-arg ref="dataSourceSpied" />
</bean>
异常信息：
java.lang.IllegalStateException: Failed to load ApplicationContext
at org.springframework.test.context.CacheAwareContextLoaderDelegate.loadContext(CacheAwareContextLoaderDelegate.java:99) ~[spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.test.context.TestContext.getApplicationContext(TestContext.java:122) ~[spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:109) ~[spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:75) ~[spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:312) ~[spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:211) [spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:288) [spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.11.jar:na]
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:284) [spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231) [spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:88) [spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) [junit-4.11.jar:na]
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) [junit-4.11.jar:na]
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) [junit-4.11.jar:na]
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) [junit-4.11.jar:na]
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) [junit-4.11.jar:na]
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) [spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71) [spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.junit.runners.ParentRunner.run(ParentRunner.java:309) [junit-4.11.jar:na]
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174) [spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) [.cp/:na]
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) [.cp/:na]
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) [.cp/:na]
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) [.cp/:na]
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) [.cp/:na]
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) [.cp/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userDao' defined in file [C:\stsworkspace\git\tqc\tqc-common-dal\target\classes\spring\applicationContext-dal.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in URL [file:/C:/stsworkspace/git/tqc/tqc-common-dal/target/classes/spring/datasource.xml]: Cannot resolve reference to bean 'dataSource' while setting bean property 'dataSource'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in URL [file:/C:/stsworkspace/git/tqc/tqc-common-dal/target/classes/spring/datasource.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [net.sf.log4jdbc.sql.jdbcapi.DataSourceSpy]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: Could not initialize class net.sf.log4jdbc.Properties
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:529) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:626) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932) ~[spring-context-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479) ~[spring-context-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:120) ~[spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:60) ~[spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.delegateLoading(AbstractDelegatingSmartContextLoader.java:100) ~[spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.loadContext(AbstractDelegatingSmartContextLoader.java:248) ~[spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.test.context.CacheAwareContextLoaderDelegate.loadContextInternal(CacheAwareContextLoaderDelegate.java:64) ~[spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.test.context.CacheAwareContextLoaderDelegate.loadContext(CacheAwareContextLoaderDelegate.java:91) ~[spring-test-3.2.3.RELEASE.jar:3.2.3.RELEASE]
... 25 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sqlSessionFactory' defined in URL [file:/C:/stsworkspace/git/tqc/tqc-common-dal/target/classes/spring/datasource.xml]: Cannot resolve reference to bean 'dataSource' while setting bean property 'dataSource'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in URL [file:/C:/stsworkspace/git/tqc/tqc-common-dal/target/classes/spring/datasource.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [net.sf.log4jdbc.sql.jdbcapi.DataSourceSpy]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: Could not initialize class net.sf.log4jdbc.Properties
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:329) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:107) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1387) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1128) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireByName(AbstractAutowireCapableBeanFactory.java:1146) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1096) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
... 39 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in URL [file:/C:/stsworkspace/git/tqc/tqc-common-dal/target/classes/spring/datasource.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [net.sf.log4jdbc.sql.jdbcapi.DataSourceSpy]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: Could not initialize class net.sf.log4jdbc.Properties
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:288) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1045) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:949) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:487) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:323) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
... 51 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [net.sf.log4jdbc.sql.jdbcapi.DataSourceSpy]: Constructor threw exception; nested exception is java.lang.NoClassDefFoundError: Could not initialize class net.sf.log4jdbc.Properties
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:163) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:121) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:280) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
... 60 common frames omitted
Caused by: java.lang.NoClassDefFoundError: Could not initialize class net.sf.log4jdbc.Properties
at net.sf.log4jdbc.log.SpyLogFactory.getSpyLogDelegator(SpyLogFactory.java:69) ~[log4jdbc-log4j2-jdbc4-1.16.jar:na]
at net.sf.log4jdbc.sql.jdbcapi.DataSourceSpy.<init>(DataSourceSpy.java:90) ~[log4jdbc-log4j2-jdbc4-1.16.jar:na]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_11]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_11]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_11]
at java.lang.reflect.Constructor.newInstance(Constructor.java:408) ~[na:1.8.0_11]
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:148) ~[spring-beans-3.2.3.RELEASE.jar:3.2.3.RELEASE]
... 62 common frames omitted
16:44:15.402 [main] DEBUG o.s.t.c.s.DirtiesContextTestExecutionListener - After test class: context [[TestContext@8a9f61 testClass = TestUserDao, testInstance = [null], testMethod = [null], testException = [null], mergedContextConfiguration = [MergedContextConfiguration@16905e testClass = TestUserDao, locations = '{classpath*:/spring/applicationContext*.xml, classpath*:/spring/datasource.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]]], dirtiesContext [false].
产生原因：
我的日志环境使用的是slf4j，log4jdbc-log4j2默认只支持log4j2，如果想要支持slf4j，则需要增加如下配置：
Configure log4jdbc-log4j2 options log4jdbc-log4j2 can be configured in the exact same way than log4jdbc (see below). Please note two changes as compared to log4jdbc: log4jdbc.spylogdelegator.name: this is a new option, allowing to provide the qualified class name of the logger to use. Notably, if you want to use the SLF4J logger rather than Log4j 2, you must set this option to the valuenet.sf.log4jdbc.log.slf4j.Slf4jSpyLogDelegator.
解决方案：
在classpath的jdbc.properties中增加如下配置：
#jdbc settings
#db.driver=com.mysql.jdbc.Driver
#db.url=jdbc:mysql://127.0.0.1:3306/tqc
db.driver=net.sf.log4jdbc.sql.jdbcapi.DriverSpy
db.url=jdbc:log4jdbc:mysql://127.0.0.1:3306/tqc
db.username=aaa
db.password=aaa
log4jdbc.log4j2.properties中增加如下配置
dbc.spylogdelegator.name=net.sf.log4jdbc.log.slf4j.Slf4jSpyLogDelegator
log4jdbc.debug.stack.prefix=
log4jdbc.sqltiming.warn.threshold=
log4jdbc.sqltiming.error.threshold=
log4jdbc.dump.booleanastruefalse=
log4jdbc.dump.sql.maxlinelength=
log4jdbc.dump.fulldebugstacktrace=
log4jdbc.statement.warn=
log4jdbc.dump.sql.select=
log4jdbc.dump.sql.insert=
log4jdbc.dump.sql.update=
log4jdbc.dump.sql.delete=
log4jdbc.dump.sql.create=
log4jdbc.dump.sql.addsemicolon=
log4jdbc.auto.load.popular.drivers=
log4jdbc.trim.sql=
log4jdbc.trim.sql.extrablanklines=
log4jdbc.suppress.generated.keys.exception=
log4jdbc.drivers=
异常：Caused by: java.lang.NoClassDefFoundError: Could not initialize class net.sf.log4jdbc.Properties的更多相关文章
- 异常-----java.lang.NoClassDefFoundError: Could not initialize class net.sf.cglib.core.KeyFactory
SSH 类库问题 java.lang.NoClassDefFoundError: Could not initialize class net.sf.cglib.proxy.Enhancer2009- ...
- java.lang.NoClassDefFoundError: Could not initialize class net.sf.json.util.JSONUtils
页面报错: root: java.lang.NoClassDefFoundError: Could not initialize class net.sf.json.util.JSONUtils 出错 ...
- 类找不到异常 Caused by: java.lang.NoClassDefFoundError
错误原因:在部署应用的时候,服务器报错,Caused by: java.lang.ClassNotFoundException: org.quartz.impl.JobDetailImpl,某个类找不 ...
- Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.elasticsearch.threadpool.ThreadPool
springboot中遇到的, 将guava添加到项目中即可.(当时添加的是guava 18)
- Java 上传文件到 SFTP 抛异常 java.lang.NoClassDefFoundError: Could not initialize class sun.security.ec.SunEC 的解决办法
最近从 Op 那里报来一个问题,说是SFTP上传文件不成功.拿到的 Exception 如下: Caused by: java.lang.NoClassDefFoundError: Could not ...
- java.lang.NoClassDefFoundError: Could not initialize class异常处理
借鉴:http://blog.csdn.net/sleepdancer/article/details/9207425 static { InputStream in = XXX.class.getR ...
- 【转】Caused by: java.lang.NoClassDefFoundError: android.support.v7.gridlayout.R$dimen 异常解决方法
在使用gridlayout中遇到 Caused by: java.lang.NoClassDefFoundError: android.support.v7.gridlayout.R$dimen 问题 ...
- 异常：Caused by: java.lang.NoClassDefFoundError: org/springframework/web/context/WebApplicationContext
说明项目没有加载jar包 异常:Caused by: java.lang.NoClassDefFoundError: org/springframework/web/context/WebApplic ...
- 1.spring异常：Caused by: java.lang.NoClassDefFoundError: org/aopalliance/intercept/MethodInterceptor
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springfr ...
随机推荐
- 微信消息处理JAXP-sax解析
package cn.zhaokai.sax; import java.io.IOException; import java.io.InputStream; import java.io.Print ...
- ASP.NET Web - 开篇
ASP.NET运行库 服务器系统上需要ASP.NET运行库.如果系统上有IIS,就会在安装.NET Framework时为服务器配置ASP.NET运行库.开发过程中,不需要IIS,因为VS发布了自己的 ...
- http 4中 cache 头
// head['Cache-Control']='max-age=31536000'; // head['Expires']=new Date((new Date().getTime()+99999 ...
- HDU 2121 Ice_cream’s world II 不定根最小树形图
题目链接: 题目 Ice_cream's world II Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Ja ...
- nenu contest3 The 5th Zhejiang Provincial Collegiate Programming Contest
ZOJ Problem Set - 2965 Accurately Say "CocaCola"! http://acm.zju.edu.cn/onlinejudge/showP ...
- 找不到对应的webservice配置参数[ProcessService]
在UI端 保存时 界面显示无法保存 且报此错误 “找不到对应的webservice配置参数[ProcessService]” 此下为解决方法: 首先 在[应用管理平台]--[参数模板设置] 找到你的参 ...
- Linux 操作Mysql详解
一.引言 想使用Linux已经很长时间了,由于没有硬性任务一直也没有系统学习,近日由于工作需要必须使用Linux下的MySQL.本以为有 Windows下使用SQL Server的经验,觉得在Linu ...
- Kafka之Purgatory Redesign Proposal （翻译）
Purgatory是Kafka server中处理请求时使用的一个重要的数据结构.正好研究ReplicaManager源码的时候发现了这篇文章,顺便翻译下.由于这个proposal里的很多东西需要看源 ...
- HDU 1087 Super Jumping! Jumping! Jumping!（最长上升子序列，dp）
以下引用自:http://www.cnblogs.com/Lyush/archive/2011/08/31/2161314.html沐阳 该题可以算是一道经典的DP题了,题中数据是这样的.以 3 1 ...
- javascript加速运动
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <m ...