java.security.NoSuchAlgorithmException: SHA1PRNG SecureRandom not available

好久沒有使用MyEclipse10了，今天打開看了以前大學的項目，在Tomcat7中發布啟動，我嚓嘞，報錯：

SEVERE: Exception initializing random number generator using algorithm [SHA1PRNG]
java.security.NoSuchAlgorithmException: SHA1PRNG SecureRandom not available
    at sun.security.jca.GetInstance.getInstance(Unknown Source)
    at java.security.SecureRandom.getInstance(Unknown Source)
    at org.apache.catalina.util.SessionIdGeneratorBase.createSecureRandom(SessionIdGeneratorBase.java:210)
    at org.apache.catalina.util.SessionIdGeneratorBase.getRandomBytes(SessionIdGeneratorBase.java:174)
    at org.apache.catalina.util.StandardSessionIdGenerator.generateSessionId(StandardSessionIdGenerator.java:34)
    at org.apache.catalina.util.SessionIdGeneratorBase.generateSessionId(SessionIdGeneratorBase.java:167)
    at org.apache.catalina.util.SessionIdGeneratorBase.startInternal(SessionIdGeneratorBase.java:256)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
    at org.apache.catalina.session.ManagerBase.startInternal(ManagerBase.java:714)
    at org.apache.catalina.session.StandardManager.startInternal(StandardManager.java:461)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5643)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:899)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:875)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652)
    at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1260)
    at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:2002)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

 看到這個錯誤，一頭霧水，從來沒有見過這個錯誤，以為是tomcat7的緣故，又換位tomcat6，發布啟動之后，我叉，有出現錯誤：

SEVERE: Cannot find message associated with key managerBase.digest
java.security.NoSuchAlgorithmException: MD5 MessageDigest not available
    at sun.security.jca.GetInstance.getInstance(Unknown Source)
    at java.security.Security.getImpl(Unknown Source)
    at java.security.MessageDigest.getInstance(Unknown Source)
    at org.apache.catalina.session.ManagerBase.getDigest(ManagerBase.java:478)
    at org.apache.catalina.session.ManagerBase.generateSessionId(ManagerBase.java:1220)
    at org.apache.catalina.session.StandardManager.start(StandardManager.java:636)
    at org.apache.catalina.core.ContainerBase.setManager(ContainerBase.java:448)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4665)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:803)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:780)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:583)
    at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:676)
    at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:602)
    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:503)
    at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1322)
    at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:325)
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1069)
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:822)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1061)
    at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
    at org.apache.catalina.core.StandardService.start(StandardService.java:525)
    at org.apache.catalina.core.StandardServer.start(StandardServer.java:759)
    at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

然后，干脆就去掉項目，單獨的啟動tomcat6 和 tomcat7，我叉，還是一樣的錯誤，這說明 原來的項目是沒有問題的，那就是 MyEclipse10 和 tomcat的原因了。

因為tomcat6和tomcat7 依賴的是 JDK7，所以報了這個錯，原因還不清楚，但是在eclipse中 tomcat6 和 tomcat7 是可以使用JDK7的。於是，把tomcat6 和 tomcat7 依賴的JDK7換為 MyEclipse10自帶的JDK6，重新啟動tomcat，我叉，真的就沒有問題了。