【Reids】09-Template整合List类型（分页显示）_redistemplate list分页-优快云博客

本文详细介绍了一种使用Redis进行列表数据存储与检索的方法，并通过Spring框架整合实现具体业务功能。文章展示了如何在UserService接口中定义listAdd和listRange方法，分别用于向Redis列表添加元素和获取指定范围内的元素。此外，还提供了具体的实现代码和服务测试案例。

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service

/**
 * @author AnQi
 * @date 2020/3/14 17 41:00
 * @description
 */
public interface UserService {
    //list 存
    public void listAdd();
    //取
 public List<String> listRange(int pageNum,int pageSize);
}

serviceimpl

/**
     * list 存取
     * template 模板
     */
    @Override
    public void listAdd() {
      //  redisTemplate.opsForList()
      String key ="news:top10";
//        list.leftPush(key,"aaaa");
//        list.leftPushAll(key,"fsdgsd","bbbb","ccccc");
        list.rightPushAll(key,"1","2","3","5","6","7","8","9","10");
    }
    @Override
    public List<String> listRange(int pageNum,int pageSize) {
        String key ="news:top10";
        int start = (pageNum-1)*pageSize;
        int stop = pageNum*pageSize-1;
        List<String> range = list.range(key, start, stop);

        Long size = list.size(key);
        System.out.println(size);
        return range;
    }

Test

   @Test
    public void t1(){
        ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("spring-redis.xml");
        UserService userService = ctx.getBean(UserService.class);
        User u= new User();
        u.setUsername("aqqqqq");
        u.setPassword("123123");
        u.setAge(22);
        u.setId(10);
        u.setName("安");

        userService.add(u);
        System.out.println("OK");
    }
    @Test
    public void t2(){
        ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("spring-redis.xml");
        UserService userService = ctx.getBean(UserService.class);
        userService.listAdd();
        int pageNum =2; //当前页
        int pageSize=3; //每页显示3条数据
        List<String> listRange =userService.listRange(pageNum,pageSize);
        for (String s : listRange) {
            System.out.println(s);
        }

    }