配置

新建spring boot项目增加redis配置

        <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency>

在需要缓存的地方增加redis缓存

package com.example.sharding.service;import com.alibaba.fastjson.JSON;
import com.example.sharding.entity.Order;
import com.example.sharding.mapper.OrderMapper;
import com.fasterxml.jackson.databind.ObjectMapper; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.redis.core.RedisTemplate; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import java.io.IOException; import java.util.List; @Service @Transactional public class OrderService { @Autowired private OrderMapper orderMapper; @Autowired private RedisTemplate redisTemplate; public Object findAll() throws IOException { List<Order> orders = orderMapper.selectAll(); ObjectMapper mapper = new ObjectMapper(); redisTemplate.opsForValue().set("orders",mapper.writeValueAsString(orders)); return orders; } public void save(Order order) { orderMapper.insert(order); redisTemplate.opsForHash().put("order",order.getOrderId().toString(), JSON.parseObject(JSON.toJSONString(order)).toJSONString()); } public void deleteAll() { orderMapper.deleteAll(); redisTemplate.delete("order"); redisTemplate.delete("orders"); } } 

修改example.conf

server {listen       80;  server_name  _;  location = /order { default_type 'text/html'; lua_code_cache off; content_by_lua_file C:\work\openresty-1.13.6.1-win32\example\lua/test_redis_basic.lua; } location /lua { default_type 'text/html'; lua_code_cache off; content_by_lua_file C:\work\openresty-1.13.6.1-win32\example\lua/test.lua; } # 其他请求回源到tomcat location / { proxy_pass http://tomcat/; } } # 后端服务地址 upstream tomcat { server 127.0.0.1:8080 max_fails=5 fail_timeout=10s weight=1; keepalive 100; } 

修改test_redis_basic.lua文件

local function close_redis(red) if not red then return end local ok, err = red:close() if not ok then ngx.say("close redis error : ", err) end end local function read_order() local resp = ngx.location.capture("/order/query", { method = ngx.HTTP_GET }) if not resp then return end if resp.status ~= 200 then return end return resp.body end local redis = require("resty.redis") local cjson = require("cjson") -- 引入json模块 --创建实例 local red = redis:new() --设置超时（毫秒） red:set_timeout(1000) --建立连接 local ip = "127.0.0.1" local port = 6379 local ok, err = red:connect(ip, port) if not ok then ngx.say("connect to redis error : ", err) return close_redis(red) end local res, err = red:auth("shiyuesoft") if not res then ngx.say("failed to authenticate: ", err) return end --调用API获取数据 local resp, err = red:get("orders") if not resp then ngx.say("get msg error : ", err) return close_redis(red) end --得到的数据为空处理 if resp == ngx.null then resp = read_order() --回源到tomcat去查询 end ngx.say(cjson.decode(resp)) --对返回的数据转换成json对象 close_redis(red) 

先请求deleteAll删除所有缓存

新增order数据

访问/order地址

第一次由于没有缓存，会进入接口查询

后面继续刷新页面，不会再进入后端接口了