Getting Started

Installation steps for MAC user:

STEP 1: Download tar.gz

STEP 2: Run bin/elasticsearch

STEP 3: Run curl http://localhost:9200/

Elaticsearch Java API

Maven Configuration(pom.xml)

<dependencies>
  <dependency>
    <groupId>org.elasticsearch</groupId>
    <artifactId>elasticsearch</artifactId>
    <version>5.6.3</version>
  </dependency>
  <dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>transport</artifactId>
    <version>5.6.3</version>
  </dependency>
  <dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-high-level-client</artifactId>
    <version>5.6.3</version>
  </dependency>
  <dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-client</artifactId>
    <version>5.6.3</version>
  </dependency>
  <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>3.8.1</version>
    <scope>test</scope>
  </dependency>
  <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.8.0</version>
  </dependency>
  <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
    <version>2.8.0</version>
  </dependency>
  <dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.8.0</version>
  </dependency>
  <dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <version>2.8.2</version>
  </dependency>
  <dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.8.2</version>
  </dependency>
</dependencies>

Common Error:

1.ERROR StatusLogger Log4j2 could not find a logging implementation. Please add log4j-core to the classpath. Using SimpleLogger to log to the console...

2.ERROR StatusLogger LogManager returned an instance of org.apache.logging.log4j.simple.SimpleLoggerContextFactory which does not implement org.apache.logging.log4j.core.impl.Log4jContextFactory. Unable to initialize Log4j.

<dependency>
  <groupId>org.apache.logging.log4j</groupId>
  <artifactId>log4j-api</artifactId>
  <version>2.8.2</version>
</dependency>
<dependency>
  <groupId>org.apache.logging.log4j</groupId>
  <artifactId>log4j-core</artifactId>
  <version>2.8.2</version>
</dependency>

Then, put this configuration file in the src->main->java folder, naming log4j2.xml.

<?xml version="1.0" encoding="UTF-8"?>
<!--日志级别以及优先级排序: OFF > FATAL > ERROR > WARN > INFO > DEBUG > TRACE > ALL -->
<!--Configuration后面的status，这个用于设置log4j2自身内部的信息输出，可以不设置，当设置成trace时，你会看到log4j2内部各种详细输出-->
<!--monitorInterval：Log4j能够自动检测修改配置 文件和重新配置本身，设置间隔秒数-->
<configuration status="WARN" monitorInterval="30">
     <!--先定义所有的appender-->
     <appenders>
     <!--这个输出控制台的配置-->
         <console name="Console" target="SYSTEM_OUT">
         <!--输出日志的格式-->
             <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
         </console>
     <!--文件会打印出所有信息，这个log每次运行程序会自动清空，由append属性决定，这个也挺有用的，适合临时测试用-->
     <File name="log" fileName="log/test.log" append="false">
        <PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n"/>
     </File>
     <!-- 这个会打印出所有的info及以下级别的信息，每次大小超过size，则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩，作为存档-->
         <RollingFile name="RollingFileInfo" fileName="${sys:user.home}/logs/info.log"
                      filePattern="${sys:user.home}/logs/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log">
             <!--控制台只输出level及以上级别的信息（onMatch），其他的直接拒绝（onMismatch）-->        
             <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="DENY"/>
             <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
             <Policies>
                 <TimeBasedTriggeringPolicy/>
                 <SizeBasedTriggeringPolicy size="100 MB"/>
             </Policies>
         </RollingFile>
         <RollingFile name="RollingFileWarn" fileName="${sys:user.home}/logs/warn.log"
                      filePattern="${sys:user.home}/logs/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log">
             <ThresholdFilter level="warn" onMatch="ACCEPT" onMismatch="DENY"/>
             <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
             <Policies>
                 <TimeBasedTriggeringPolicy/>
                 <SizeBasedTriggeringPolicy size="100 MB"/>
             </Policies>
         <!-- DefaultRolloverStrategy属性如不设置，则默认为最多同一文件夹下7个文件，这里设置了20 -->
             <DefaultRolloverStrategy max="20"/>
         </RollingFile>
         <RollingFile name="RollingFileError" fileName="${sys:user.home}/logs/error.log"
                      filePattern="${sys:user.home}/logs/$${date:yyyy-MM}/error-%d{yyyy-MM-dd}-%i.log">
             <ThresholdFilter level="error" onMatch="ACCEPT" onMismatch="DENY"/>
             <PatternLayout pattern="[%d{HH:mm:ss:SSS}] [%p] - %l - %m%n"/>
             <Policies>
                 <TimeBasedTriggeringPolicy/>
                 <SizeBasedTriggeringPolicy size="100 MB"/>
             </Policies>
         </RollingFile>
     </appenders>
     <!--然后定义logger，只有定义了logger并引入的appender，appender才会生效-->
     <loggers>
         <!--过滤掉spring和mybatis的一些无用的DEBUG信息-->
         <logger name="org.springframework" level="INFO"></logger>
         <logger name="org.mybatis" level="INFO"></logger>
         <root level="all">
             <appender-ref ref="Console"/>
             <appender-ref ref="RollingFileInfo"/>
             <appender-ref ref="RollingFileWarn"/>
             <appender-ref ref="RollingFileError"/>
         </root>
     </loggers>
 </configuration>