相关疑难解决方法(0)

我正在尝试使用twitter4j库为我的java项目发送推文.在我第一次运行时,我收到了关于证书sun.security.validator.ValidatorException和错误的错误sun.security.provider.certpath.SunCertPathBuilderException.然后我添加了twitter证书:

C:\Program Files\Java\jdk1.7.0_45\jre\lib\security>keytool -importcert -trustcacerts -file PathToCert -alias ca_alias -keystore "C:\Program Files\Java\jdk1.7.0_45\jre\lib\security\cacerts"

但没有成功.这是获得twitters的过程:

public static void main(String[] args) throws TwitterException {
    ConfigurationBuilder cb = new ConfigurationBuilder();
    cb.setDebugEnabled(true)
        .setOAuthConsumerKey("myConsumerKey")
        .setOAuthConsumerSecret("myConsumerSecret")
        .setOAuthAccessToken("myAccessToken")
        .setOAuthAccessTokenSecret("myAccessTokenSecret");

    TwitterFactory tf = new TwitterFactory(cb.build());
    Twitter twitter = tf.getInstance();

    try {
        Query query = new Query("iphone");
        QueryResult result;
        result = twitter.search(query);
        System.out.println("Total amount of tweets: " + result.getTweets().size());
        List<Status> tweets = result.getTweets();

        for (Status tweet : tweets) {
            System.out.println("@" + tweet.getUser().getScreenName() + " …

当我编译我的spring项目时,我收到以下错误.

在类路径资源中定义名为'entityManagerFactory'的bean时出错[org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]:调用init方法失败

我正在使用STS Eclipse和MySql数据库

我的连接字符串Application.Properties是

spring.datasource.url=jdbc:mysql://localhost:3306/stgdb
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.hibernate.ddl-auto=update

详细错误如下

=================================================

2016-10-15 15:34:38.875[0;39m [31mERROR[0;39m [35m3700[0;39m [2m---[0;39m [2m[           main][0;39m [36mo.s.boot.SpringApplication              [0;39m [2m:[0;39m Application startup failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is javax.persistence.PersistenceException: [PersistenceUnit: default] Unable to build Hibernate SessionFactory
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1583) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1076) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE] …

在四月2021（最新更新到JDK 11.0.11+9-0ubuntu2~18.04），用于支持TLSv1和TLSv1.1被放弃了，可能是因为2021年3月份以来的版本不再支持。从java.security文件中的差异可以看出这一点：

前：

jdk.tls.disabledAlgorithms=SSLv3, RC4, DES, MD5withRSA, DH keySize < 1024, \
    EC keySize < 224, 3DES_EDE_CBC, anon, NULL, \
    include jdk.disabled.namedCurves

后：

jdk.tls.disabledAlgorithms=SSLv3, TLSv1, TLSv1.1, RC4, DES, MD5withRSA, \
    DH keySize < 1024, EC keySize < 224, 3DES_EDE_CBC, anon, NULL, \
    include jdk.disabled.namedCurves

这也在这篇 SO 帖子中进行了讨论：SSLHandShakeException No Appropriate Protocol。在该线程中，自更新的 JDK 版本以来的最后几天还出现了更多答案。

这次更新JDK后，我们收到错误

java.sql.SQLException: An attempt by a client to checkout a Connection has timed out.

与c3p0.

切换到后，hikari …

我正在尝试使用 jdk1.8.0_xxx 连接到 jms 服务，但出现 ssl 握手错误。但是，我无法真正理解 javax.net.debug 的输出。

System property jdk.tls.client.cipherSuites is set to 'null'
System property jdk.tls.server.cipherSuites is set to 'null'
Ignoring disabled cipher suite: TLS_DH_anon_WITH_AES_256_CBC_SHA
Ignoring disabled cipher suite: TLS_DH_anon_WITH_AES_256_CBC_SHA256
Ignoring disabled cipher suite: TLS_ECDHE_RSA_WITH_NULL_SHA
Ignoring disabled cipher suite: SSL_RSA_WITH_DES_CBC_SHA
Ignoring disabled cipher suite: SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA
Ignoring disabled cipher suite: TLS_KRB5_WITH_DES_CBC_MD5
Ignoring disabled cipher suite: TLS_ECDH_RSA_WITH_NULL_SHA
Ignoring disabled cipher suite: SSL_DH_anon_EXPORT_WITH_RC4_40_MD5
Ignoring disabled cipher suite: SSL_DH_anon_WITH_DES_CBC_SHA
Ignoring disabled cipher suite: TLS_DH_anon_WITH_AES_128_CBC_SHA
Ignoring disabled cipher suite: TLS_KRB5_WITH_3DES_EDE_CBC_SHA
Ignoring disabled …