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2020-12-23 09:07:27 +08:00

回复了 rqxiao 创建的主题 › Java › urlencode 的一些疑惑

@AoEiuV020 您说的对

2020-12-03 13:37:30 +08:00

回复了 awen233333 创建的主题 › 数据库 › sql 问题,怎样将 null 值去掉,数据往上对齐

order by 可以实现的吧

2020-11-12 11:05:41 +08:00

回复了 rqxiao 创建的主题 › Java › 求教 Java 中 http 长轮询机制怎么实现

死循环的确是办法

2020-11-11 14:49:12 +08:00

回复了 rqxiao 创建的主题 › Java › 求教 Java 中 http 长轮询机制怎么实现

我这边应该是客户端 ,对方是服务端

2020-11-10 14:51:35 +08:00

回复了 rqxiao 创建的主题 › Java › AES 256 生成秘钥的时候可以不使用 SecureRandom 的生成的写法吗

@Jrue0011 KeyGenerator.init （ 256 ）的确是有个默认的 SecureRandom 的，我百度出的一些 aes 加密网站，验证下来 128 的时候他们是没有用 SecureRandom，所以就想试下 256 的写法。不过大家都说 SecureRandom 的确更安全，256 这个也没必要试了。

2020-11-09 14:54:24 +08:00

回复了 rqxiao 创建的主题 › Java › AES 256 生成秘钥的时候可以不使用 SecureRandom 的生成的写法吗

就是想请问下
AES 256 生成秘钥的时候不使用 SecureRandom 可以吗，写法是什么样的

还有 SecureRandom 这种写法其实用过，但是也不知道为什么每次加密解密都是都是利用 SecureRandom 生成的 key，但是实际上这个 key 并不是“随机的”，加密解密其实都是用同一个 key

2020-10-19 17:18:24 +08:00

回复了 prolic 创建的主题 › 职场话题 › 裸辞了两个月，感觉快抑郁了，当树洞诉诉苦

楼主加油

2020-10-10 16:51:00 +08:00

回复了 rqxiao 创建的主题 › 程序员 › 国庆回来公司电脑中了加密邮件勒索病毒

@zhongjun96 电脑里所有文件都被加密了一张骷髅头的图留了一个邮箱

2020-09-17 18:30:18 +08:00

回复了 rqxiao 创建的主题 › 程序员 › 请求有并发的时候，该怎么处理数据

@libook 嗯用个唯一索引来保存回调 id 的应该是可行，现在接受后的确还要处理业务逻辑也用了消息队列了

2020-08-25 14:02:13 +08:00

回复了 rqxiao 创建的主题 › MySQL › 请教 left join 右表后，只返回在 leftjoin 的结果里，返回右表中 OrderNo 最大的那一条

SELECT
a.*,
b.*
FROM
lefta a
LEFT JOIN ( SELECT max( id ), a_id FROM leftb GROUP BY a_id ) b ON a.id = b.a_id
差不多这样子也行了

2020-08-14 10:12:57 +08:00

回复了 rqxiao 创建的主题 › 程序员 › 请教 springboot 后台接受 urlEncode 这种数据时，如何可以较好的接受参数

@intmax2147483647 不是我就想问下 urlencode 了&和= 您有什么办一个个全取出来

2020-08-13 18:26:57 +08:00

回复了 rqxiao 创建的主题 › 程序员 › 请教 springboot 后台接受 urlEncode 这种数据时，如何可以较好的接受参数

@leafre
http://127.0.0.1:8808/test/t1?name%3Dbob%26id%3Daaaaa%26orderNum%3D2019%26charset%3Dutf-8 我用这个试好像还是不行

2020-08-13 18:17:59 +08:00

回复了 rqxiao 创建的主题 › 程序员 › 请教 springboot 后台接受 urlEncode 这种数据时，如何可以较好的接受参数

@mgcnrx11 这样也不行啊回调我方法的时候不会是这样的 http://127.0.0.1:8808/test/t1?name=bob&id=aaaaa&orderNum=2019&charset=utf-8 这种格式的

2020-08-13 17:58:17 +08:00

回复了 rqxiao 创建的主题 › 程序员 › 请教 springboot 后台接受 urlEncode 这种数据时，如何可以较好的接受参数

@gotonull 就是想请问下一般接受 urlEncode 参数时，后台代码有没有可以单独接受每个参数的写法

request.getParameterMap()返回了所有参数拼接的一个字符串

2020-07-13 13:58:00 +08:00

回复了 isnowify 创建的主题 › 分享发现 › 育碧 UPlay 免费领取看门狗 2

已领，谢谢楼主

2020-07-08 13:37:41 +08:00

回复了 rqxiao 创建的主题 › Java › hashmap1.7 里扩容死循环和线程不安全是什么原因呢

@serical 想问下是不是因为第一个线程改变了元 table 里 entry 里之间的只向，才导致死循环吗

2020-06-23 14:55:59 +08:00

回复了 rqxiao 创建的主题 › Elasticsearch › ElasticsearchRepository 方法命名查询条数限制

@312ybj 2.0.8

2020-06-17 15:40:03 +08:00

回复了 rqxiao 创建的主题 › 程序员 › 有关于项目中数据库连接报错的问题

@GM 额你说的有道理，这些数据库操作和连接第三方 api 都是在一个 @Transactional 内，访问 api 前就有数据库的一些操作，之后的操作应该也是在这个连接上操作...

2020-06-17 14:49:21 +08:00

回复了 rqxiao 创建的主题 › 程序员 › 有关于项目中数据库连接报错的问题

Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 87,000 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago.
at sun.reflect.GeneratedConstructorAccessor236.newInstance(Unknown Source) ~[na:na]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_211]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_211]
at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) ~[mysql-connector-java-5.1.47.jar!/:5.1.47]
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:990) ~[mysql-connector-java-5.1.47.jar!/:5.1.47]
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3562) ~[mysql-connector-java-5.1.47.jar!/:5.1.47]
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3462) ~[mysql-connector-java-5.1.47.jar!/:5.1.47]
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3905) ~[mysql-connector-java-5.1.47.jar!/:5.1.47]
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2530) ~[mysql-connector-java-5.1.47.jar!/:5.1.47]
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2683) ~[mysql-connector-java-5.1.47.jar!/:5.1.47]
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2495) ~[mysql-connector-java-5.1.47.jar!/:5.1.47]
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1903) ~[mysql-connector-java-5.1.47.jar!/:5.1.47]
at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1242) ~[mysql-connector-java-5.1.47.jar!/:5.1.47]
at com.alibaba.druid.filter.FilterChainImpl.preparedStatement_execute(FilterChainImpl.java:3409) ~[druid-1.1.14.jar!/:1.1.14]
at com.alibaba.druid.filter.FilterEventAdapter.preparedStatement_execute(FilterEventAdapter.java:440) ~[druid-1.1.14.jar!/:1.1.14]
at com.alibaba.druid.filter.FilterChainImpl.preparedStatement_execute(FilterChainImpl.java:3407) ~[druid-1.1.14.jar!/:1.1.14]
at com.alibaba.druid.proxy.jdbc.PreparedStatementProxyImpl.execute(PreparedStatementProxyImpl.java:167) ~[druid-1.1.14.jar!/:1.1.14]
at com.alibaba.druid.pool.DruidPooledPreparedStatement.execute(DruidPooledPreparedStatement.java:497) ~[druid-1.1.14.jar!/:1.1.14]
at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:64) ~[mybatis-3.5.1.jar!/:3.5.1]
at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:79) ~[mybatis-3.5.1.jar!/:3.5.1]
at sun.reflect.GeneratedMethodAccessor121.invoke(Unknown Source) ~[na:na]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_211]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_211]
at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:63) ~[mybatis-3.5.1.jar!/:3.5.1]
at com.sun.proxy.$Proxy228.query(Unknown Source) ~[na:na]
at com.baomidou.mybatisplus.core.executor.MybatisSimpleExecutor.doQuery(MybatisSimpleExecutor.java:67) ~[mybatis-plus-core-3.1.1.jar!/:3.1.1]
at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324) ~[mybatis-3.5.1.jar!/:3.5.1]
at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156) ~[mybatis-3.5.1.jar!/:3.5.1]
at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109) ~[mybatis-3.5.1.jar!/:3.5.1]
at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83) ~[mybatis-3.5.1.jar!/:3.5.1]
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147) ~[mybatis-3.5.1.jar!/:3.5.1]
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140) ~[mybatis-3.5.1.jar!/:3.5.1]
at sun.reflect.GeneratedMethodAccessor110.invoke(Unknown Source) ~[na:na]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_211]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_211]
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433) ~[mybatis-spring-2.0.1.jar!/:2.0.1]
at com.sun.proxy.$Proxy87.selectList(Unknown Source) ~[na:na]
at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:230) ~[mybatis-spring-2.0.1.jar!/:2.0.1]
at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.executeForMany(MybatisMapperMethod.java:158) ~[mybatis-plus-core-3.1.1.jar!/:3.1.1]
at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.execute(MybatisMapperMethod.java:76) ~[mybatis-plus-core-3.1.1.jar!/:3.1.1]
at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:62) ~[mybatis-plus-core-3.1.1.jar!/:3.1.1]
at com.sun.proxy.$Proxy121.selectList(Unknown Source) ~[na:na]
at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl.list(ServiceImpl.java:276) ~[mybatis-plus-extension-3.1.1.jar!/:3.1.1]
at com.baomidou.mybatisplus.extension.service.IService.list(IService.java:247) ~[mybatis-plus-extension-3.1.1.jar!/:3.1.1]
at com.baomidou.mybatisplus.extension.service.IService$$FastClassBySpringCGLIB$$f8525d18.invoke(<generated>) ~[mybatis-plus-extension-3.1.1.jar!/:3.1.1]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-5.0.12.RELEASE.jar!/:5.0.12.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:684) ~[spring-aop-5.0.12.RELEASE.jar!/:5.0.12.RELEASE]
... 17 common frames omitted
Caused by: java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:3014) ~[mysql-connector-java-5.1.47.jar!/:5.1.47]
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3472) ~[mysql-connector-java-5.1.47.jar!/:5.1.47]
... 60 common frames omitted

2020-06-17 14:48:55 +08:00

回复了 rqxiao 创建的主题 › 程序员 › 有关于项目中数据库连接报错的问题

### Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 87,000 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago.
### The error may exist in */mapper/***Mapper.java (best guess)
### The error may involve defaultParameterMap
### The error occurred while setting parameters
### SQL: SELECT id,code,type,create_dt FROM table
### Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 87,000 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago.
; Communications link failure

The last packet successfully received from the server was 87,000 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago.; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 87,000 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago.
2020-06-17 09:48:09.249 ERROR 1037 --- [chedule-pool-10] c.c.rosebeautyapp.common.util.Threads :
### Error updating database. Cause: java.sql.SQLException: connection disabled
### The error may exist in */mapper/***Mapper.java (best guess)
### The error may involve **Mapper.updateById
### The error occurred while executing an update
### SQL: UPDATE table SET user_id=?,mobile=?, create_dt=?, update_dt=?, uptime=?, upload=?, up_load=?, status=?, order_id=? WHERE id=?
### Cause: java.sql.SQLException: connection disabled
; uncategorized SQLException; SQL state [null]; error code [0]; connection disabled; nested exception is java.sql.SQLException: connection disabled

org.springframework.jdbc.UncategorizedSQLException:
### Error updating database. Cause: java.sql.SQLException: connection disabled
### The error may exist in ****Mapper.java (best guess)
### The error may involve ****Mapper.updateById
### The error occurred while executing an update
### SQL: UPDATE table SET user_id=?,mobile=?, create_dt=?, update_dt=?, uptime=?, upload=?, up_load=?, status=?, order_id=? WHERE id=?
### Cause: java.sql.SQLException: connection disabled
; uncategorized SQLException; SQL state [null]; error code [0]; connection disabled; nested exception is java.sql.SQLException: connection disabled
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:89) ~[spring-jdbc-5.0.12.RELEASE.jar!/:5.0.12.RELEASE]
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81) ~[spring-jdbc-5.0.12.RELEASE.jar!/:5.0.12.RELEASE]
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81) ~[spring-jdbc-5.0.12.RELEASE.jar!/:5.0.12.RELEASE]
at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73) ~[mybatis-spring-2.0.1.jar!/:2.0.1]
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446) ~[mybatis-spring-2.0.1.jar!/:2.0.1]
at com.sun.proxy.$Proxy87.update(Unknown Source) ~[na:na]
at org.mybatis.spring.SqlSessionTemplate.update(SqlSessionTemplate.java:294) ~[mybatis-spring-2.0.1.jar!/:2.0.1]
at com.baomidou.mybatisplus.core.override.MybatisMapperMethod.execute(MybatisMapperMethod.java:63) ~[mybatis-plus-core-3.1.1.jar!/:3.1.1]
at com.baomidou.mybatisplus.core.override.MybatisMapperProxy.invoke(MybatisMapperProxy.java:62) ~[mybatis-plus-core-3.1.1.jar!/:3.1.1]
at com.sun.proxy.$Proxy104.updateById(Unknown Source) ~[na:na]
at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl.updateById(ServiceImpl.java:212) ~[mybatis-plus-extension-3.1.1.jar!/:3.1.1]
at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl$$FastClassBySpringCGLIB$$76535273.invoke(<generated>) ~[mybatis-plus-extension-3.1.1.jar!/:3.1.1]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-5.0.12.RELEASE.jar!/:5.0.12.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:684) ~[spring-aop-5.0.12.RELEASE.jar!/:5.0.12.RELEASE]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-5.0.12.RELEASE.jar!/:5.0.12.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:746) ~[spring-aop-5.0.12.RELEASE.jar!/:5.0.12.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.0.12.RELEASE.jar!/:5.0.12.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:294) ~[spring-tx-5.0.12.RELEASE.jar!/:5.0.12.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98) ~[spring-tx-5.0.12.RELEASE.jar!/:5.0.12.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) ~[spring-aop-5.0.12.RELEASE.jar!/:5.0.12.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688) ~[spring-aop-5.0.12.RELEASE.jar!/:5.0.12.RELEASE]
at ************************ServiceImpl$$EnhancerBySpringCGLIB$$3b23cf0a.recordSheet(<generated>) ~[**-manage-service-1.0-SNAPSHOT.jar!/:1.0-SNAPSHOT]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_211]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_211]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) ~[na:1.8.0_211]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) ~[na:1.8.0_211]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_211]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_211]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_211]
Caused by: java.sql.SQLException: connection disabled

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