在ecplise中使用内存数据的客端户,前提要准备要下载两个jar包 commons-pool2-2.0.jar jedis-2.4.2.jar 前提准备做好了,那我们就开启redis的服务,打开一个命令窗口输入如下命令:redis-server 或redis-server redis根目\redis.conf 服务器已经开启了,注意
在ecplise中使用内存数据的客端户,前提要准备要下载两个jar包
commons-pool2-2.0.jar
jedis-2.4.2.jar
前提准备做好了,那我们就开启redis的服务,打开一个命令窗口输入如下命令:redis-server 或redis-server redis根目\redis.conf
服务器已经开启了,注意端号是6377
2.在eclipse 创建一个项目,把redist需要的包导入项目中
3.写一个Jedis工具类
public class JedisUtil {
private static String HOST="127.0.0.1"; //本机地址
private static Integer PORT=6379; //服务端口
private static JedisPoolConfig config; //连接池的配置对象
private static JedisPool pool; //连接池对象
static{
config = new JedisPoolConfig();
config.setMaxIdle(1024*10); //设置内存大小
pool = new JedisPool(config,HOST);
}
/**
*
* @return 从连接池里获取一个Jedis对象
*/
public static Jedis getPoolJedis(){
return pool.getResource();
}
/**
* 手动把Jedis对象,回放到连接池里
*/
public static void returnPoolJedis(Jedis jedis){
pool.returnResource(jedis);
}
/**
* @return 直接创建一个Jedis连接
*/
public static Jedis getJedis(){
return new Jedis(HOST, PORT);
}
}
4.写一个客户端类操作jedis
public class Client {
public static void main(String[] args) {
//simpleSet();
mSet();
}
private static void mSet() {
//注意 如果使用 JedisUtil.getJedis(); 是直接创建一个jredis对象,所以不受连接池管理,所以不能回放到连接池里
Jedis jedis = JedisUtil.getPoolJedis();
//设置值多个值
jedis.mset("userName","user1","pwd","123");
//取值
List
for (String string : list) {
System.out.println(string);
}
jedis.flushDB();
JedisUtil.returnPoolJedis(jedis);
}
private static void simpleSet() {
Jedis jedis = JedisUtil.getPoolJedis();
//设置值
jedis.set("userName", "user1");
//取值
System.out.println("userName:"+jedis.get("userName"));
//清空内存数据库
jedis.flushDB();
JedisUtil.returnPoolJedis(jedis);
}
}
现在可以在redist客户端对数据进行取值
打开一个命令窗口,输入命令 redis-cli 开启客户端,原后进行赋值

MySQL is suitable for beginners to learn database skills. 1. Install MySQL server and client tools. 2. Understand basic SQL queries, such as SELECT. 3. Master data operations: create tables, insert, update, and delete data. 4. Learn advanced skills: subquery and window functions. 5. Debugging and optimization: Check syntax, use indexes, avoid SELECT*, and use LIMIT.

MySQL efficiently manages structured data through table structure and SQL query, and implements inter-table relationships through foreign keys. 1. Define the data format and type when creating a table. 2. Use foreign keys to establish relationships between tables. 3. Improve performance through indexing and query optimization. 4. Regularly backup and monitor databases to ensure data security and performance optimization.

MySQL is an open source relational database management system that is widely used in Web development. Its key features include: 1. Supports multiple storage engines, such as InnoDB and MyISAM, suitable for different scenarios; 2. Provides master-slave replication functions to facilitate load balancing and data backup; 3. Improve query efficiency through query optimization and index use.

SQL is used to interact with MySQL database to realize data addition, deletion, modification, inspection and database design. 1) SQL performs data operations through SELECT, INSERT, UPDATE, DELETE statements; 2) Use CREATE, ALTER, DROP statements for database design and management; 3) Complex queries and data analysis are implemented through SQL to improve business decision-making efficiency.

The basic operations of MySQL include creating databases, tables, and using SQL to perform CRUD operations on data. 1. Create a database: CREATEDATABASEmy_first_db; 2. Create a table: CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY, titleVARCHAR(100)NOTNULL, authorVARCHAR(100)NOTNULL, published_yearINT); 3. Insert data: INSERTINTObooks(title, author, published_year)VA

The main role of MySQL in web applications is to store and manage data. 1.MySQL efficiently processes user information, product catalogs, transaction records and other data. 2. Through SQL query, developers can extract information from the database to generate dynamic content. 3.MySQL works based on the client-server model to ensure acceptable query speed.

The steps to build a MySQL database include: 1. Create a database and table, 2. Insert data, and 3. Conduct queries. First, use the CREATEDATABASE and CREATETABLE statements to create the database and table, then use the INSERTINTO statement to insert the data, and finally use the SELECT statement to query the data.

MySQL is suitable for beginners because it is easy to use and powerful. 1.MySQL is a relational database, and uses SQL for CRUD operations. 2. It is simple to install and requires the root user password to be configured. 3. Use INSERT, UPDATE, DELETE, and SELECT to perform data operations. 4. ORDERBY, WHERE and JOIN can be used for complex queries. 5. Debugging requires checking the syntax and use EXPLAIN to analyze the query. 6. Optimization suggestions include using indexes, choosing the right data type and good programming habits.


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