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sql Sql database Database data base Data Base improve Improve optimize Optimize mysql Mysql oracle Oracle db2 Db2 sqlserver Sqlserver dba Dba 优化 limit Limit having HAVING in IN not in exists EXISTS not exists NOT EXISTS insert INSERT index Index composite index Composite Index 索引 复合索引 like LIKE browser Browser origin Origin same-origin SAME-ORIGIN same origin Same Origin cross-domain CROSS-DOMAIN cross domain Cross Domain ajax Ajax AJAX cookie Cookie localStorage LocalStorage indexDB dom DOM document.domain window.name 片段识别符 fragment identifier Fragment Identifier window.postMessage jsonp JSONP webSocket WebSocket cors CORS Java java volatile Volatile singleton pattern Singleton Pattern singleton Singleton synchronized Synchronized jmm JMM happen before Happen Before happen-before Happen-Before Debug debug Bug bug junit Junit transactional Transactional removeAbandoned RemoveAbandoned favicon.ico tomcat Tomcat firefox Firefox 火狐 session Session Java8 java8 extend extends implement implements interface default method Default Method eclipse Eclipse 方法引用 函数引用 Method References method references exception Exception checked exception Checked Exception checked-exception Checked-Exception RuntimeException errorCode error code Error Code 阿里巴巴JAVA开发手册 enum Enum 枚举 分布式 返回值 return value Return Value style guide Style Guide 规范 Spring spring SpringMvc springMvc HttpMessageConverter httpMessageConverter Serialize serialize 序列化 Deserialize deserialize 反序列化 custom format 自定义格式 type convert 类型转换 Converter converter Formatter formatter SpringBoot springBoot Spring Boot spring boot MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter Configuration configuration SSM ssm Convert convert Serializer serializer Deserializer deserializer Fastjson fastjson FastjsonHttpMessageConverter fastjsonHttpMessageConverter ORM orm Mybatis mybatis Batch Insert batch insert 批量插入 MQ mq Rocketmq rocketmq Kafka kafka Message message DB db Springboot springboot Override override Bean bean Jackson jackson Resource resource Gateway gateway API Gateway api gateway Kong kong Netflix Zuul netflix zuul Envoy envoy Spring-Cloud-Gateway spring-cloud-gateway Soul soul Logic Delete logic delete DB Null Value db null value Database Null Value database null value DB Null Substitute Value db null substitute value Database Null Substitute Value database null substitute value ZooKeeper zooKeeper Single System Image single system image Zab zab