Redis中实用真实案例

引入需要使用的坐标

	
        <dependency>
            <groupId>redis.clientsgroupId>
            <artifactId>jedisartifactId>
            <version>2.8.1version>
        dependency>
        <dependency>
            <groupId>org.springframework.datagroupId>
            <artifactId>spring-data-redisartifactId>
            <version>1.7.2.RELEASEversion>
        dependency>

使用拷贝好的配置文件

redis-config.properties
**注意 不要有空格 服务器地址要对上 **

# Redis settings 
# server IP 
redis.host=192.168.25.128
# server port 
redis.port=6379
# server pass 
redis.pass=
# use dbIndex 
redis.database=0
# \u63A7\u5236\u4E00\u4E2Apool\u6700\u591A\u6709\u591A\u5C11\u4E2A\u72B6\u6001\u4E3Aidle(\u7A7A\u95F2\u7684)\u7684jedis\u5B9E\u4F8B 
redis.maxIdle=300
# \u8868\u793A\u5F53borrow(\u5F15\u5165)\u4E00\u4E2Ajedis\u5B9E\u4F8B\u65F6\uFF0C\u6700\u5927\u7684\u7B49\u5F85\u65F6\u95F4\uFF0C\u5982\u679C\u8D85\u8FC7\u7B49\u5F85\u65F6\u95F4(\u6BEB\u79D2)\uFF0C\u5219\u76F4\u63A5\u629B\u51FAJedisConnectionException\uFF1B  
redis.maxWait=3000
# \u5728borrow\u4E00\u4E2Ajedis\u5B9E\u4F8B\u65F6\uFF0C\u662F\u5426\u63D0\u524D\u8FDB\u884Cvalidate\u64CD\u4F5C\uFF1B\u5982\u679C\u4E3Atrue\uFF0C\u5219\u5F97\u5230\u7684jedis\u5B9E\u4F8B\u5747\u662F\u53EF\u7528\u7684  
redis.testOnBorrow=true

applicationContext-redis.xml
此处 与spring整合 可以注入到需使用的地方 redisTemplate

 
<beans xmlns="http://www.springframework.org/schema/beans" 
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" 
  xmlns:context="http://www.springframework.org/schema/context" 
  xmlns:mvc="http://www.springframework.org/schema/mvc" 
  xmlns:cache="http://www.springframework.org/schema/cache"
  xsi:schemaLocation="http://www.springframework.org/schema/beans   
            http://www.springframework.org/schema/beans/spring-beans.xsd   
            http://www.springframework.org/schema/context   
            http://www.springframework.org/schema/context/spring-context.xsd   
            http://www.springframework.org/schema/mvc   
            http://www.springframework.org/schema/mvc/spring-mvc.xsd 
            http://www.springframework.org/schema/cache  
            http://www.springframework.org/schema/cache/spring-cache.xsd">  
  
   <context:property-placeholder location="classpath*:properties/*.properties" />   
  
    
   <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">  
     <property name="maxIdle" value="${redis.maxIdle}" />   
     <property name="maxWaitMillis" value="${redis.maxWait}" />  
     <property name="testOnBorrow" value="${redis.testOnBorrow}" />  
   bean>  
  
   <bean id="JedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" 
       p:host-name="${redis.host}" p:port="${redis.port}" p:password="${redis.pass}" p:pool-config-ref="poolConfig"/>  
   
   <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">  
    	<property name="connectionFactory" ref="JedisConnectionFactory" />  
   bean>  
      
beans>  

然后就可以使用了

逻辑最好在根处解决 处理
这里我们就在service中

package com.pinyougou.content.service.impl;

import java.util.ArrayList;
import java.util.List;

import com.pinyougou.content.service.ContentService;
import com.pinyougou.entity.PageResult;
import org.springframework.beans.factory.annotation.Autowired;
import com.alibaba.dubbo.config.annotation.Service;
import com.github.pagehelper.PageInfo;
import com.github.pagehelper.PageHelper;
import com.pinyougou.mapper.TbContentMapper;
import com.pinyougou.pojo.TbContent;
import com.pinyougou.pojo.TbContentExample;
import com.pinyougou.pojo.TbContentExample.Criteria;
import org.springframework.data.redis.core.RedisTemplate;
;

/**
 * 服务实现层
 *
 * @author Administrator
 */
@Service
public class ContentServiceImpl implements ContentService {

    @Autowired
    private TbContentMapper contentMapper;
    @Autowired
    private RedisTemplate redisTemplate;
      //----------------------------------------------------------------------------------------------------------------------------- 这里才是精髓   
	 @Override
    public List findContById(Long id) {
        //前往redis中查找    存的为hash   content 大组  id 为小组
        List<TbContent> contentAll = (List<TbContent>) redisTemplate.boundHashOps("content").get(id);
        if(contentAll==null){  //查不到就为null  
            TbContentExample example = new TbContentExample();
            example.createCriteria().andCategoryIdEqualTo(id);
            //对广告列表数据排序显示
            example.setOrderByClause("sort_order desc"); //排序条件是字段名
            contentAll = contentMapper.selectByExample(example);
            redisTemplate.boundHashOps("content").put(id,contentAll);
            System.out.println("-------从MySql获取数据-------");
        }else{
            System.out.println("-------从redis获取数据-------");
        }
        return contentAll;
    }
    //--------------------------------------------------------------------------------------------------------------------------------------下面为赠送  一起沾过来的
    /**
     * 查询全部
     */
    @Override
    public List<TbContent> findAll() {

        return contentMapper.selectByExample(null);
    }

    /**
     * 增加
     */
    @Override
    public void add(TbContent content) {
        contentMapper.insert(content);
    }


    /**
     * 修改
     */
    @Override
    public void update(TbContent content) {
        contentMapper.updateByPrimaryKey(content);
    }

    /**
     * 根据ID获取实体
     *
     * @param id
     * @return
     */
    @Override
    public TbContent findOne(Long id) {
        return contentMapper.selectByPrimaryKey(id);
    }

    /**
     * 批量删除
     */
    @Override
    public void delete(Long[] ids) {
        for (Long id : ids) {
            contentMapper.deleteByPrimaryKey(id);
        }
    }

    /**
     * 分页查询+模糊搜索
     */
    @Override
    public PageResult findAll(TbContent content, int pageNum, int pageSize) {
        PageHelper.startPage(pageNum, pageSize);

        TbContentExample example = new TbContentExample();
        Criteria criteria = example.createCriteria();

        if (content != null) {
            if (content.getTitle() != null && content.getTitle().length() > 0) {
                criteria.andTitleLike("%" + content.getTitle() + "%");
            }
            if (content.getUrl() != null && content.getUrl().length() > 0) {
                criteria.andUrlLike("%" + content.getUrl() + "%");
            }
            if (content.getPic() != null && content.getPic().length() > 0) {
                criteria.andPicLike("%" + content.getPic() + "%");
            }
            if (content.getStatus() != null && content.getStatus().length() > 0) {
                criteria.andStatusLike("%" + content.getStatus() + "%");
            }

        }

        List<TbContent> lists = contentMapper.selectByExample(example);

        PageInfo<TbContent> page = new PageInfo<>(lists);

        return new PageResult(page.getTotal(), page.getList());
    }

   

}