bluemapleman / newsrecommendsystem Goto Github PK

public static void removeOverNews(Set set, int N){
int i = 0;
Iterator ite = set.iterator();
while (ite.hasNext()){
if (i >= N){
ite.remove();
ite.next();
}else{
ite.next();
}
i++;
}
}

要把
if (i >= N){
ite.remove();
ite.next();
}
里边的这两名话交换一下位置，移除的结果才是正确的

我在main 中按照你在readme中所说进行调试 测试数据一直为零 请问是什么原因

您好！不好意思请问一下该项目是只需要配置好数据库url、user、password就可以了吗？运行出现了一些错误，还不能定位出在哪个地方。

D:\Java\jdk1.8.0_321\bin\java.exe "-javaagent:D:\soft\IntelliJ IDEA Community Edition 2021.3.3\lib\idea_rt.jar=60833:D:\soft\IntelliJ IDEA Community Edition 2021.3.3\bin" -Dfile.encoding=UTF-8 -classpath D:\java\jdk1.8.0_321\jre\lib\charsets.jar;D:\java\jdk1.8.0_321\jre\lib\deploy.jar;D:\java\jdk1.8.0_321\jre\lib\ext\access-bridge-64.jar;D:\java\jdk1.8.0_321\jre\lib\ext\cldrdata.jar;D:\java\jdk1.8.0_321\jre\lib\ext\dnsns.jar;D:\java\jdk1.8.0_321\jre\lib\ext\jaccess.jar;D:\java\jdk1.8.0_321\jre\lib\ext\jfxrt.jar;D:\java\jdk1.8.0_321\jre\lib\ext\localedata.jar;D:\java\jdk1.8.0_321\jre\lib\ext\nashorn.jar;D:\java\jdk1.8.0_321\jre\lib\ext\sunec.jar;D:\java\jdk1.8.0_321\jre\lib\ext\sunjce_provider.jar;D:\java\jdk1.8.0_321\jre\lib\ext\sunmscapi.jar;D:\java\jdk1.8.0_321\jre\lib\ext\sunpkcs11.jar;D:\java\jdk1.8.0_321\jre\lib\ext\zipfs.jar;D:\java\jdk1.8.0_321\jre\lib\javaws.jar;D:\java\jdk1.8.0_321\jre\lib\jce.jar;D:\java\jdk1.8.0_321\jre\lib\jfr.jar;D:\java\jdk1.8.0_321\jre\lib\jfxswt.jar;D:\java\jdk1.8.0_321\jre\lib\jsse.jar;D:\java\jdk1.8.0_321\jre\lib\management-agent.jar;D:\java\jdk1.8.0_321\jre\lib\plugin.jar;D:\java\jdk1.8.0_321\jre\lib\resources.jar;D:\java\jdk1.8.0_321\jre\lib\rt.jar;D:\GRADUATE\1\target\classes;D:\java\jdk1.8.0_321\lib\tools.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\jfinal\jfinal\3.0\jfinal-3.0.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\cglib\cglib-nodep\3.1\cglib-nodep-3.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\ansj\ansj_seg\5.0.3\ansj_seg-5.0.3.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\nlpcn\nlp-lang\1.7\nlp-lang-1.7.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\slf4j\slf4j-api\1.7.21\slf4j-api-1.7.21.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\mchange\c3p0\0.9.5.1\c3p0-0.9.5.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\mchange\mchange-commons-java\0.2.10\mchange-commons-java-0.2.10.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\fasterxml\jackson\core\jackson-core\2.5.3\jackson-core-2.5.3.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\log4j\log4j\1.2.16\log4j-1.2.16.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\mysql\mysql-connector-java\8.0.28\mysql-connector-java-8.0.28.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\google\protobuf\protobuf-java\3.11.4\protobuf-java-3.11.4.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\quartz-scheduler\quartz\2.2.2\quartz-2.2.2.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\postgresql\postgresql\42.1.1\postgresql-42.1.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\mahout\mahout-core\0.9\mahout-core-0.9.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\mahout\mahout-math\0.9\mahout-math-0.9.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\codehaus\jackson\jackson-core-asl\1.9.12\jackson-core-asl-1.9.12.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\codehaus\jackson\jackson-mapper-asl\1.9.12\jackson-mapper-asl-1.9.12.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\thoughtworks\xstream\xstream\1.4.4\xstream-1.4.4.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\xmlpull\xmlpull\1.1.3.1\xmlpull-1.1.3.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\xpp3\xpp3_min\1.1.4c\xpp3_min-1.1.4c.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\lucene\lucene-core\4.6.1\lucene-core-4.6.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\lucene\lucene-analyzers-common\4.6.1\lucene-analyzers-common-4.6.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\mahout\commons\commons-cli\2.0-mahout\commons-cli-2.0-mahout.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\commons\commons-math3\3.2\commons-math3-3.2.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\solr\solr-commons-csv\3.5.0\solr-commons-csv-3.5.0.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hadoop\hadoop-core\1.2.1\hadoop-core-1.2.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\commons-cli\commons-cli\1.2\commons-cli-1.2.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\sun\jersey\jersey-core\1.8\jersey-core-1.8.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\sun\jersey\jersey-json\1.8\jersey-json-1.8.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\codehaus\jettison\jettison\1.1\jettison-1.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\stax\stax-api\1.0.1\stax-api-1.0.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\sun\xml\bind\jaxb-impl\2.2.3-1\jaxb-impl-2.2.3-1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\javax\xml\bind\jaxb-api\2.2.2\jaxb-api-2.2.2.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\javax\xml\stream\stax-api\1.0-2\stax-api-1.0-2.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\javax\activation\activation\1.1\activation-1.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\codehaus\jackson\jackson-jaxrs\1.7.1\jackson-jaxrs-1.7.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\codehaus\jackson\jackson-xc\1.7.1\jackson-xc-1.7.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\sun\jersey\jersey-server\1.8\jersey-server-1.8.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\asm\asm\3.1\asm-3.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\commons-httpclient\commons-httpclient\3.0.1\commons-httpclient-3.0.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\commons-codec\commons-codec\1.4\commons-codec-1.4.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\commons\commons-math\2.1\commons-math-2.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\commons-configuration\commons-configuration\1.6\commons-configuration-1.6.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\commons-collections\commons-collections\3.2.1\commons-collections-3.2.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\commons-digester\commons-digester\1.8\commons-digester-1.8.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\commons-beanutils\commons-beanutils\1.7.0\commons-beanutils-1.7.0.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\commons-beanutils\commons-beanutils-core\1.8.0\commons-beanutils-core-1.8.0.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\commons-net\commons-net\1.4.1\commons-net-1.4.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\commons-el\commons-el\1.0\commons-el-1.0.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\mahout\mahout-integration\0.12.2\mahout-integration-0.12.2.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\mahout\mahout-hdfs\0.12.2\mahout-hdfs-0.12.2.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hadoop\hadoop-client\2.4.1\hadoop-client-2.4.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hadoop\hadoop-hdfs\2.4.1\hadoop-hdfs-2.4.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hadoop\hadoop-mapreduce-client-app\2.4.1\hadoop-mapreduce-client-app-2.4.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hadoop\hadoop-mapreduce-client-common\2.4.1\hadoop-mapreduce-client-common-2.4.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hadoop\hadoop-yarn-client\2.4.1\hadoop-yarn-client-2.4.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\sun\jersey\jersey-client\1.9\jersey-client-1.9.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hadoop\hadoop-yarn-server-common\2.4.1\hadoop-yarn-server-common-2.4.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hadoop\hadoop-mapreduce-client-shuffle\2.4.1\hadoop-mapreduce-client-shuffle-2.4.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\slf4j\slf4j-log4j12\1.7.5\slf4j-log4j12-1.7.5.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hadoop\hadoop-yarn-api\2.4.1\hadoop-yarn-api-2.4.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hadoop\hadoop-mapreduce-client-jobclient\2.4.1\hadoop-mapreduce-client-jobclient-2.4.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hadoop\hadoop-annotations\2.4.1\hadoop-annotations-2.4.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\mahout\mahout-mr\0.12.2\mahout-mr-0.12.2.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\commons-io\commons-io\2.4\commons-io-2.4.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\google\guava\guava\14.0.1\guava-14.0.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hbase\hbase-client\1.0.0\hbase-client-1.0.0.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hbase\hbase-annotations\1.0.0\hbase-annotations-1.0.0.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hbase\hbase-common\1.0.0\hbase-common-1.0.0.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\mortbay\jetty\jetty-util\6.1.26\jetty-util-6.1.26.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hbase\hbase-protocol\1.0.0\hbase-protocol-1.0.0.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\commons-lang\commons-lang\2.6\commons-lang-2.6.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\commons-logging\commons-logging\1.2\commons-logging-1.2.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\io\netty\netty-all\4.0.23.Final\netty-all-4.0.23.Final.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\zookeeper\zookeeper\3.4.6\zookeeper-3.4.6.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\htrace\htrace-core\3.1.0-incubating\htrace-core-3.1.0-incubating.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\jruby\jcodings\jcodings\1.0.8\jcodings-1.0.8.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\jruby\joni\joni\2.1.2\joni-2.1.2.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hadoop\hadoop-auth\2.5.1\hadoop-auth-2.5.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\httpcomponents\httpclient\4.2.5\httpclient-4.2.5.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\httpcomponents\httpcore\4.2.4\httpcore-4.2.4.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\directory\server\apacheds-kerberos-codec\2.0.0-M15\apacheds-kerberos-codec-2.0.0-M15.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\directory\server\apacheds-i18n\2.0.0-M15\apacheds-i18n-2.0.0-M15.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\directory\api\api-asn1-api\1.0.0-M20\api-asn1-api-1.0.0-M20.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\directory\api\api-util\1.0.0-M20\api-util-1.0.0-M20.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hadoop\hadoop-common\2.5.1\hadoop-common-2.5.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\xmlenc\xmlenc\0.52\xmlenc-0.52.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\avro\avro\1.7.4\avro-1.7.4.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\thoughtworks\paranamer\paranamer\2.3\paranamer-2.3.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\xerial\snappy\snappy-java\1.0.4.1\snappy-java-1.0.4.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\jcraft\jsch\0.1.42\jsch-0.1.42.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\google\code\findbugs\jsr305\1.3.9\jsr305-1.3.9.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\commons\commons-compress\1.4.1\commons-compress-1.4.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\tukaani\xz\1.0\xz-1.0.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hadoop\hadoop-mapreduce-client-core\2.5.1\hadoop-mapreduce-client-core-2.5.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\apache\hadoop\hadoop-yarn-common\2.5.1\hadoop-yarn-common-2.5.1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\io\netty\netty\3.6.2.Final\netty-3.6.2.Final.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\com\github\stephenc\findbugs\findbugs-annotations\1.3.9-1\findbugs-annotations-1.3.9-1.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\junit\junit\4.11\junit-4.11.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\hamcrest\hamcrest-core\1.3\hamcrest-core-1.3.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\org\jsoup\jsoup\1.8.3\jsoup-1.8.3.jar;C:\Users\zmx.DESKTOP-QVL1S3M.m2\repository\c3p0\c3p0\0.9.1.1\c3p0-0.9.1.1.jar top.zmx.Main.Main
开始测试数据的运行！
22/04/25 11:34:09 INFO log.MLog: MLog clients using slf4j logging.
22/04/25 11:34:10 INFO c3p0.C3P0Registry: Initializing c3p0-0.9.5.1 [built 16-June-2015 00:06:36 -0700; debug? true; trace: 10]
22/04/25 11:34:10 INFO impl.AbstractPoolBackedDataSource: Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 2, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, contextClassLoaderSource -> caller, dataSourceName -> 1hgfdohaoqarocy547uhg|7d417077, debugUnreturnedConnectionStackTraces -> false, description -> null, driverClass -> com.mysql.jdbc.Driver, extensions -> {}, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, forceSynchronousCheckins -> false, forceUseNamedDriverClass -> false, identityToken -> 1hgfdohaoqarocy547uhg|7d417077, idleConnectionTestPeriod -> 0, initialPoolSize -> 10, jdbcUrl -> null, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 20, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 100, maxStatements -> 0, maxStatementsPerConnection -> 0, minPoolSize -> 10, numHelperThreads -> 3, preferredTestQuery -> null, privilegeSpawnedThreads -> false, properties -> {}, propertyCycle -> 0, statementCacheNumDeferredCloseThreads -> 0, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, userOverrides -> {}, usesTraditionalReflectiveProxies -> false ]
Loading class com.mysql.jdbc.Driver'. This is deprecated. The new driver class is com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
22/04/25 11:34:40 WARN resourcepool.BasicResourcePool: com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@73d699ae -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception:
java.lang.NullPointerException
at org.postgresql.Driver.parseURL(Driver.java:531)
at org.postgresql.Driver.acceptsURL(Driver.java:463)
at java.sql.DriverManager.getDriver(DriverManager.java:299)
at com.mchange.v2.c3p0.DriverManagerDataSource.driver(DriverManagerDataSource.java:285)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:161)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:161)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:147)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:202)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)
at com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44)
at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)
22/04/25 11:34:40 WARN resourcepool.BasicResourcePool: com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@b999da4 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception:
java.lang.NullPointerException
at org.postgresql.Driver.parseURL(Driver.java:531)
at org.postgresql.Driver.acceptsURL(Driver.java:463)
at java.sql.DriverManager.getDriver(DriverManager.java:299)
at com.mchange.v2.c3p0.DriverManagerDataSource.driver(DriverManagerDataSource.java:285)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:161)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:161)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:147)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:202)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)
at com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44)
at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)
22/04/25 11:34:40 WARN resourcepool.BasicResourcePool: com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@2017aca0 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception:
java.lang.NullPointerException
at org.postgresql.Driver.parseURL(Driver.java:531)
at org.postgresql.Driver.acceptsURL(Driver.java:463)
at java.sql.DriverManager.getDriver(DriverManager.java:299)
at com.mchange.v2.c3p0.DriverManagerDataSource.driver(DriverManagerDataSource.java:285)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:161)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:161)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:147)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:202)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)
at com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44)
at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)
22/04/25 11:34:40 WARN resourcepool.BasicResourcePool: Having failed to acquire a resource, com.mchange.v2.resourcepool.BasicResourcePool@43814d18 is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests.
22/04/25 11:34:40 WARN resourcepool.BasicResourcePool: Having failed to acquire a resource, com.mchange.v2.resourcepool.BasicResourcePool@43814d18 is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests.
22/04/25 11:34:40 WARN resourcepool.BasicResourcePool: Having failed to acquire a resource, com.mchange.v2.resourcepool.BasicResourcePool@43814d18 is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests.
22/04/25 11:34:40 WARN resourcepool.BasicResourcePool: com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@5c42cc1e -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception:
java.lang.NullPointerException
at org.postgresql.Driver.parseURL(Driver.java:531)
at org.postgresql.Driver.acceptsURL(Driver.java:463)
at java.sql.DriverManager.getDriver(DriverManager.java:299)
at com.mchange.v2.c3p0.DriverManagerDataSource.driver(DriverManagerDataSource.java:285)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:161)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:161)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:147)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:202)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)
at com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44)
at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)
22/04/25 11:34:40 WARN resourcepool.BasicResourcePool: Having failed to acquire a resource, com.mchange.v2.resourcepool.BasicResourcePool@43814d18 is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests.
22/04/25 11:34:40 ERROR dbconnection.DBKit: 数据库连接初始化错误！
Exception in thread "main" java.lang.NullPointerException
at com.jfinal.plugin.activerecord.Db.update(Db.java:213)
at top.zmx.Main.TestDataRunner.databaseReady(TestDataRunner.java:39)
at top.zmx.Main.TestDataRunner.runTestData(TestDataRunner.java:24)
at top.zmx.Main.Main.main(Main.java:23)

Process finished with exit code 1

19/09/09 10:41:16 INFO impl.AbstractPoolBackedDataSource: Initializing c3p0 pool... com.mchange.v2.c3p0.ComboPooledDataSource [ acquireIncrement -> 2, acquireRetryAttempts -> 30, acquireRetryDelay -> 1000, autoCommitOnClose -> false, automaticTestTable -> null, breakAfterAcquireFailure -> false, checkoutTimeout -> 0, connectionCustomizerClassName -> null, connectionTesterClassName -> com.mchange.v2.c3p0.impl.DefaultConnectionTester, contextClassLoaderSource -> caller, dataSourceName -> 1bqrgyfa55iqosw1l9r37i|dd8ba08, debugUnreturnedConnectionStackTraces -> false, description -> null, driverClass -> com.mysql.jdbc.Driver, extensions -> {}, factoryClassLocation -> null, forceIgnoreUnresolvedTransactions -> false, forceSynchronousCheckins -> false, forceUseNamedDriverClass -> false, identityToken -> 1bqrgyfa55iqosw1l9r37i|dd8ba08, idleConnectionTestPeriod -> 0, initialPoolSize -> 10, jdbcUrl -> jdbc:mysql://localhost:3306/newsrecommender?useUnicode=true&characterEncoding=utf8, maxAdministrativeTaskTime -> 0, maxConnectionAge -> 0, maxIdleTime -> 20, maxIdleTimeExcessConnections -> 0, maxPoolSize -> 100, maxStatements -> 0, maxStatementsPerConnection -> 0, minPoolSize -> 10, numHelperThreads -> 3, preferredTestQuery -> null, privilegeSpawnedThreads -> false, properties -> {user=, password=}, propertyCycle -> 0, statementCacheNumDeferredCloseThreads -> 0, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, userOverrides -> {}, usesTraditionalReflectiveProxies -> false ]
19/09/09 10:41:16 ERROR dbconnection.DBKit: 数据库连接初始化错误！

执行mvn compile 遇到错误：Could not resolve dependencies for project top.tomqian:recommender-system:jar:0.0.1-SNAPSHOT: Could not find artifact jdk.tools:jdk.tools:jar:1.7 at specified path /usr/local/java/jdk-17.0.2/../lib/tools.jar
求教一下这个问题应该怎么解决，网上找了很多资料都没有解决。
感谢！

请问下博主的环境配置是什么呢？

topHotNewsList 这个list 不知道干啥用的， 暂时没看到从哪往这个list add 数据

你好，请问新闻抓取部分内容是抓取不了的，是没有这个功能还是BUG呢，。

只用协同过滤方法，没有生成推荐结果

请问下效果评估该如何去实现呢？

大大你好，我最近也在做相关的推荐系统，有一些问题，希望方便加个QQ请教一下。

请问项目还在维护吗

以下是我的一些问题：
1.对测试数据进行测试结果应该是较为符合，但是进行协同过滤也会产生两条推荐，id:1用户的103号新闻以及id：3用户的101号新闻。
2.新闻推荐表如果不进行清空多次推荐就会报错并且不追加写入
3.关于后续的日常使用，大佬在说明里提到抓取的代码是默认对网易新闻首页的所有新闻进行一次抓取入库，同时也提到入库的新闻需要标注module_id，这块我不太理解.查看代码也不清楚这个module_id是怎么标注的
是要手动标注还是自动辨别的。
4.如果要真实使用的话用户的数据是怎么采集的，网页浏览信息是人工设定，还是有相关代码能生成。

關於您的第二點額外說明～
想請問一下，Mahout 協同過濾工具不好嗎？
目前這項目還有持續維護嗎？非常期待後期的部分～

词语出现在文章，文章总数是用的词频。
public Keyword(String name, int docFreq, double weight) {
this.name = name;
this.idf = Math.log(10000 + 10000.0 / (docFreq + 1));
this.score = idf * weight;
freq++;
}

Main.java 的第一行是:
package top.qianxinyao.main;
但 Main.java 所在的目录是:

NewsRecommendSystem/src/top/qianxinyao/Main/Main.java

'Main' 目录的 'M' 是大写的, 与 Main.java 中的第一行 package 语句不一致, Linux 下编译报错。
本人对 Java 不是特别熟悉, 难道这个大小写的问题是 Linux / Mac 平台有关?

求大佬指点一下

我的maven是3.9.0，java是19，我看您的maven是3.7，但是java版本我没有看到，然后我将本项目使用maven导入但是不能成功运行
以下为报错信息：期待您的回答，我的邮箱是[email protected]，假如您愿意帮助我调试程序成功，我可以给您发个红包感谢您
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.101 s
[INFO] Finished at: 2023-02-25T21:03:05+08:00
[INFO] ------------------------------------------------------------------------
[ERROR] No goals have been specified for this build. You must specify a valid lifecycle phase or a goal in the format : or :[:]:. Available lifecycle phases are: pre-clean, clean, post-clean, validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy, pre-site, site, post-site, site-deploy. -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/NoGoalSpecifiedException

大佬您好，我想问下您这个项目里的内容推荐可以从eclipse上移植到Android Studio上嘛？学校里要求做一个带有可以用内容推荐来推荐文章的宠物App

你好，想问下数据来源，newslogs这个表的数据怎么获取的，我看到的TestDataProcessor只是爬取网易的新闻，并没有某个用户的历史记录.

请问性能怎么保证? 比如一天增长几万个新闻, 如果有20万数据, 这个大概耗时多少? 定时任务多久能跑完呢?

博主，如果可以的话，能否删除项目中的无用文件，比如log、target这些。

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.

boolean enableCF=true,enableCB=false,enableHR=false;
List userList=new ArrayList();
userList.add(1l);
new JobSetter(enableCF,enableCB,enableHR).executeInstantJobForCertainUsers(userList);

改上面三个任意为true，都无法将推荐结果写入数据库？？？？

可以指导一下具体怎么操作吗，尤其是idea导入之后配置，网上教程对不上号，各种报错

com.jfinal.plugin.activerecord.ActiveRecordException: java.sql.SQLException: Incorrect TIMESTAMP value: ''2019-07-30''
at com.jfinal.plugin.activerecord.Model.find(Model.java:579)
at top.qianxinyao.algorithms.RecommendKit.filterReccedNews(RecommendKit.java:124)
at top.qianxinyao.contentbasedrecommend.ContentBasedRecommender.recommend(ContentBasedRecommender.java:95)
at top.qianxinyao.Main.JobSetter.executeInstantJob(JobSetter.java:112)
at top.qianxinyao.Main.JobSetter.executeInstantJobForCertainUsers(JobSetter.java:125)
at top.qianxinyao.Main.TestDataRunner.runTestData(TestDataRunner.java:37)
at top.qianxinyao.Main.Main.main(Main.java:26)
Caused by: java.sql.SQLException: Incorrect TIMESTAMP value: ''2019-07-30''
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:127)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:95)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeInternal(ClientPreparedStatement.java:960)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeQuery(ClientPreparedStatement.java:1019)
at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeQuery(NewProxyPreparedStatement.java:379)
at com.jfinal.plugin.activerecord.Model.find(Model.java:560)
at com.jfinal.plugin.activerecord.Model.find(Model.java:577)
... 6 more

按照说明进行测试可是没有任何返回

你好，我想问一下，我的机子装的是jdk9.0.4，导入以后发现pom.xml报错，尝试修改了pom加入了依赖
`

 <dependency>  
    <groupId>jdk.tools</groupId>  
    <artifactId>jdk.tools</artifactId>  
    <version>9.0.4</version>  
    <scope>system</scope>  
    <systemPath>${JAVA_HOME}/lib/tools.jar</systemPath>  
    </dependency>

`

但是好像不大管用，不知道怎么解决了

你好~

我想问一下除了需要配置MySQL，还需要其他配置吗？例如Tomcat等。

谢谢~

java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.Integer
at com.jfinal.plugin.activerecord.Model.getInt(Model.java:203)
at top.qianxinyao.hotrecommend.HotRecommender.recommend(HotRecommender.java:50)
at top.qianxinyao.Main.JobSetter.executeInstantJob(JobSetter.java:114)
at top.qianxinyao.Main.JobSetter.executeInstantJobForCertainUsers(JobSetter.java:125)
at top.qianxinyao.Main.Main.main(Main.java:40)
Thu May 21 15:17:30 CST 2020 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.Integer
at com.jfinal.plugin.activerecord.Model.getInt(Model.java:203)
at top.qianxinyao.hotrecommend.HotRecommender.recommend(HotRecommender.java:50)
at top.qianxinyao.Main.JobSetter.executeInstantJob(JobSetter.java:114)
at top.qianxinyao.Main.JobSetter.executeInstantJobForCertainUsers(JobSetter.java:125)
at top.qianxinyao.Main.Main.main(Main.java:40)
Thu May 21 15:17:30 CST 2020 WARN: Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.
java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.Integer
at com.jfinal.plugin.activerecord.Model.getInt(Model.java:203)
at top.qianxinyao.hotrecommend.HotRecommender.recommend(HotRecommender.java:50)
at top.qianxinyao.Main.JobSetter.executeInstantJob(JobSetter.java:114)
at top.qianxinyao.Main.JobSetter.executeInstantJobForCertainUsers(JobSetter.java:125)
at top.qianxinyao.Main.Main.main(Main.java:40)
HR has contributed 0 recommending news on average
HR end at Thu May 21 15:17:30 CST 2020
本次推荐结束于Thu May 21 15:17:30 CST 2020

java.lang.IllegalArgumentException: Config already exists: main
at com.jfinal.plugin.activerecord.DbKit.addConfig(DbKit.java:63)
at com.jfinal.plugin.activerecord.ActiveRecordPlugin.start(ActiveRecordPlugin.java:210)
at top.qianxinyao.dbconnection.DBKit.initalize(DBKit.java:55)
at top.qianxinyao.main.JobSetter.(JobSetter.java:43)
at top.qianxinyao.main.Main.main(Main.java:40)

楼主可以帮忙看下吗，我可以出钱
[email protected]

目前没有看到这个字段的使用,请问下这个字段是否是统计推荐结果准确率所用

提示Build Path错误，还有Maven Dependency错误。和我jdk装的1.8.0_201是否有关呢？之前没用过maven需要配置哪些呢？