什么是jedis

是官方推荐的java连接开发工具，使用java操作Redis的中间件，如果要使用java操作redis，那么要对jedis十分熟悉

测试

导入对应的依赖(Jedis和fastjson)：

<dependencies><dependency><groupId>redis.clients</groupId><artifactId>jedis</artifactId><version>3.2.0</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.62</version></dependency>
</dependencies>

编码测试：

连接数据库
操作命令
断开连接

修改配置文件（redis.conf）：

开启云服务器对应端口的防火墙
添加密码
注释bind 127.0.0.1
连接

public class TestPing {public static void main(String[] args) {//new jedis对象Jedis jedis = new Jedis("180.76.150.213",6379);jedis.auth("123");System.out.println(jedis.ping());}
}

在这里插入图片描述
如果没有输入密码:

常用API

String
List
Set
Hash
Zset

Jedis事务

正常执行：

public class TestTx {public static void main(String[] args) {Jedis jedis = new Jedis("180.76.150.213", 6379);jedis.auth("123");System.out.println(jedis.ping());jedis.flushDB();JSONObject jsonObject = new JSONObject();jsonObject.put("hello","world");jsonObject.put("name","zzy");jsonObject.put("age",20);Transaction multi = jedis.multi();String s = jsonObject.toJSONString();//开启事务try {multi.set("user1",s);multi.set("user2",s);//执行事务multi.exec();}catch (Exception e) {//放弃事务multi.discard();e.printStackTrace();}finally {System.out.println(jedis.get("user1"));System.out.println(jedis.get("user2"));//关闭连接jedis.close();}}
}

在这里插入图片描述
抛出异常，执行失败:

public class TestTx {public static void main(String[] args) {Jedis jedis = new Jedis("180.76.150.213", 6379);jedis.auth("123");System.out.println(jedis.ping());jedis.flushDB();JSONObject jsonObject = new JSONObject();jsonObject.put("hello","world");jsonObject.put("name","zzy");jsonObject.put("age",20);Transaction multi = jedis.multi();String s = jsonObject.toJSONString();//开启事务try {multi.set("user1",s);//抛出异常，事务执行失败int i = 1 / 0;multi.set("user2",s);//执行事务multi.exec();}catch (Exception e) {//放弃事务multi.discard();e.printStackTrace();}finally {System.out.println(jedis.get("user1"));System.out.println(jedis.get("user2"));//关闭连接jedis.close();}}
}