mybatis和redis整合 log4j打印sql语句

布满荆棘的人生 2022-08-21 14:51 246阅读 0赞

首先，需要在项目中引进jedis-2.8.1.jar包，在pom.xml里加上

<dependency>
          <groupId>redis.clients</groupId>
          <artifactId>jedis</artifactId>
          <version>2.8.1</version>
        </dependency>

在mybatis的配置文件中加上<property name="configurationProperties">里的一段

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
            <property name="dataSource" ref="dataSource" />  
              
            <property name="mapperLocations" value="classpath:com/cn/*/mapping/*.xml"></property>  
            <property name="configurationProperties">
                <props>
                    <prop key="cacheEnabled">true</prop> 
                    <prop key="lazyLoadingEnabled">false</prop> 
                    <prop key="aggressiveLazyLoading">true</prop>
                    <prop key="multipleResultSetsEnabled">true</prop> 
                    <prop key="defaultExecutorType">REUSE</prop> 
                    <prop key="defaultStatementTimeout">25000</prop>
                </props>
            </property>
            
        </bean>

编写redis用到的工具类SerializeUtil.java

package com.cn.util;
    
    import java.io.ByteArrayInputStream;
    import java.io.ByteArrayOutputStream;
    import java.io.ObjectInputStream;
    import java.io.ObjectOutputStream;
    
    public class SerializeUtil {
       public static byte[] serialize(Object object) {  
        ObjectOutputStream oos = null;  
        ByteArrayOutputStream baos = null;  
        try {  
    	    //序列化  
    	    baos = new ByteArrayOutputStream();  
    	    oos = new ObjectOutputStream(baos);  
    	    oos.writeObject(object);  
    	    byte[] bytes = baos.toByteArray();  
    	    return bytes;  
    	    } catch (Exception e) {  
    	     e.printStackTrace();  
    	     return null; 
    	    }  
        }  
           
        public static Object unserialize(byte[] bytes) {  
          ByteArrayInputStream bais = null;  
          try {  
    	    //反序列化  
    	    bais = new ByteArrayInputStream(bytes);  
    	    ObjectInputStream ois = new ObjectInputStream(bais);  
    	    return ois.readObject();  
    	   } catch (Exception e) {  
    	    	 return null;  
    	   }  
        }  
    }

新增一个MybatisRedisCache类，需要实现 org.apache.ibatis.cache.Cache 接口

package com.cn.util;
    
    import java.util.concurrent.locks.ReadWriteLock;
    import java.util.concurrent.locks.ReentrantReadWriteLock;
    
    import org.apache.ibatis.cache.Cache;
    import org.apache.log4j.Logger;
    
    import redis.clients.jedis.Jedis;
    import redis.clients.jedis.JedisPool;
    import redis.clients.jedis.JedisPoolConfig;
    
    
    public class MybatisRedisCache implements Cache{
    
    	  private  Logger logger = Logger.getLogger(getClass()); 
    	  private Jedis redisClient = createClient();
    	  /** The ReadWriteLock. */
    	  private final ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
    	  
    	  private String id;
    	  
    	  public MybatisRedisCache(final String id) {
    	    if (id == null) {
    	      throw new IllegalArgumentException("Cache instances require an ID");
    	    }
    	    logger.info(">>>>MybatisRedisCache:id=" + id);
    	    this.id = id;
    	  }
    
    	  @Override
    	  public String getId() {
    	    return this.id;
    	  }
    
    	  @Override
    	  public int getSize() {
    	    return Integer.valueOf(redisClient.dbSize().toString());
    	  }
    
    	  @Override
    	  public void putObject(Object key, Object value) {
    	    //logger.info(">>>>putObject:" + key + "=" + value);
    	    redisClient.setex(SerializeUtil.serialize(key.toString()), 1000,SerializeUtil.serialize(value));
    	  }
    
    	  @Override
    	  public Object getObject(Object key) {
    	    Object value = SerializeUtil.unserialize(redisClient.get(SerializeUtil.serialize(key.toString())));
    	    //logger.info(">>>>getObject:" + key + "=" + value);
    	    return value;
    	  }
    
    	  @Override
    	  public Object removeObject(Object key) {
    	    return redisClient.expire(SerializeUtil.serialize(key.toString()), 0);
    	  }
    
    	  @Override
    	  public void clear() {
    	    redisClient.flushDB();
    	  }
    
    	  @Override
    	  public ReadWriteLock getReadWriteLock() {
    	    return readWriteLock;
    	  }
    	       
    	  protected  static Jedis createClient() {
    	    try {
    	      JedisPool pool = new JedisPool(new JedisPoolConfig(), "127.0.0.1");
    	           return pool.getResource();
    	    } catch (Exception e) {
    	      e.printStackTrace();
    	    }
    	    throw new RuntimeException("初始化连接池错误");
    	  }
    
    }

在mapper.xml里加上

![Center][]

Java对象需要实现Serializable接口

package com.cn.entity;
    
    import java.io.Serializable;
    
    public class User implements Serializable{
    	private static final long serialVersionUID = -154635138564326678L;
    
    	private Integer id;
    
        private String userName;
    
        private String password;
    
        private Integer age;
    
        public Integer getId() {
            return id;
        }
    
        public void setId(Integer id) {
            this.id = id;
        }
    
        public String getUserName() {
            return userName;
        }
    
        public void setUserName(String userName) {
            this.userName = userName == null ? null : userName.trim();
        }
    
        public String getPassword() {
            return password;
        }
    
        public void setPassword(String password) {
            this.password = password == null ? null : password.trim();
        }
    
        public Integer getAge() {
            return age;
        }
    
        public void setAge(Integer age) {
            this.age = age;
        }
    }

测试的话可以用log4j打印mybatis执行的sql语句

需要在log4j配置文件里配置：

log4j.logger.org.springframework=ERROR
    log4j.logger.org.compass=ERROR
    log4j.logger.org.quartz=ERROR
    #log4j在控制台打印sql语句
    log4j.logger.com.ibatis=DEBUG
    log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=DEBUG
    log4j.logger.com.ibatis.common.jdbc.ScriptRunner=DEBUG
    log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=DEBUG
    log4j.logger.java.sql.Connection=DEBUG
    log4j.logger.java.sql.Statement=DEBUG
    log4j.logger.java.sql.PreparedStatement=DEBUG
    log4j.logger.java.sql.ResultSet=DEBUG
    #定义LOG输出级别  
    log4j.rootLogger=DEBUG,Console,File
    #定义日志输出目的地为控制台
    log4j.appender.Console=org.apache.log4j.ConsoleAppender
    #可以灵活地指定日志输出格式，下面一行是指定具体的格式
    log4j.appender.Console.layout = org.apache.log4j.PatternLayout
    log4j.appender.Console.layout.ConversionPattern=%d %p [%c] - %m%n
    #文件大小到达指定尺寸的时候产生一个新的文件
    log4j.appender.File = org.apache.log4j.RollingFileAppender
    #指定输出目录
    log4j.appender.File.File = logs/ssm.log
    #定义文件最大大小
    log4j.appender.File.MaxFileSize = 1MB
    # 输出所有日志，如果换成DEBUG表示输出DEBUG以上级别日志
    log4j.appender.File.Threshold = ALL
    log4j.appender.File.layout = org.apache.log4j.PatternLayout
    log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH\:mm\:ss}][%c]%m%n

[Center]: /images/20220724/b2bab33f33b14cf9979e2f0fd9390ca9.png