SpringBoot入门系列： redis（四）

原创

第零人 2022-12-14 15:25:39 博主文章分类：Spring ©著作权

文章标签 spring redis sed 文章分类 Redis 数据库

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一，准备工作，建立spring-boot-sample-redis工程

1、http://start.spring.io/

A、Artifact中输入spring-boot-sample-redis

B、勾选Web下的web

C、勾选NOSQL下的Redis

2、Eclips中导入工程spring-boot-sample-redis

A、解压快捷工程spring-boot-sample-redis到某文件夹

B、eclips中file->import->Import Existing Maven Projects–>Select Maven projects–>finish导入工程

3、工程导入之后，文件结构如下图

SpringBoot入门系列： redis（四）_sed

4、在包com.example下建立web文件夹

5、便于测试，引入spring-boot-sample-helloworld的HelloController及配置文件logback.xml

HelloController代码为

package com.example.web;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    protected static Logger logger=LoggerFactory.getLogger(HelloController.class);

    @RequestMapping("/")
    public String helloworld(){
        logger.debug("访问hello");
        return "Hello world!";
    }

    @RequestMapping("/hello/{name}")
    public String helloName(@PathVariable String name){
        logger.debug("访问helloName,Name={}",name);
        return "Hello "+name;
    }
}

logback.xml配置为

<configuration>  
    <!-- %m输出的信息,%p日志级别,%t线程名,%d日期,%c类的全名,,,, -->  
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">  
        <encoder>  
            <pattern>%d %p (%file:%line\)- %m%n</pattern>
            <charset>GBK</charset> 
        </encoder>  
    </appender>  
    <appender name="baselog"  
        class="ch.qos.logback.core.rolling.RollingFileAppender">  
        <File>log/base.log</File>  
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  
            <fileNamePattern>log/base.log.%d.i%</fileNamePattern>  
            <timeBasedFileNamingAndTriggeringPolicy  class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">  
                <!-- or whenever the file size reaches 64 MB -->  
                <maxFileSize>64 MB</maxFileSize>  
            </timeBasedFileNamingAndTriggeringPolicy>  
        </rollingPolicy>  
        <encoder>  
            <pattern>  
                %d %p (%file:%line\)- %m%n
            </pattern>  
            <charset>UTF-8</charset> <!-- 此处设置字符集 --> 
        </encoder>  
    </appender>  
    <root level="info">  
        <appender-ref ref="STDOUT" />  
    </root>  
    <logger name="com.example" level="DEBUG">  
        <appender-ref ref="baselog" />  
    </logger>  
</configuration>

注：logback.xml文件位于src/main/resources下

6、启动工程，通过浏览器查看正确性

http://localhost:8080/

http://localhost:8080/hello/上帝

二，使用StringRedisTemplate

1、web文件下建立class，类名为StringRedisController，编写StringRedisController为

package com.example.web;

import javax.annotation.Resource;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class StringRedisController {
    
    protected static Logger logger=LoggerFactory.getLogger(StringRedisController.class);
    
    @Autowired
    StringRedisTemplate stringRedisTemplate;
    
    @Resource(name="stringRedisTemplate")
    ValueOperations<String,String> valOpsStr;
    
    @RequestMapping("set")
    public String setKeyAndValue(String key,String value){
        logger.debug("访问set:key={},value={}",key,value);
        valOpsStr.set(key, value);
        return "Set Ok";
    }
    
    @RequestMapping("get")
    public String getKey(String key){
        logger.debug("访问get:key={}",key);
        return valOpsStr.get(key);
    }
}

2、修改工程配置文件application.properties，增加以下内容

#redis数据库名称  从0到15,默认为db0
spring.redis.database=1

#redis服务器名称 spring.redis.host=127.0.0.1 #redis服务器密码 spring.redis.password=123456 #redis服务器连接端口号 spring.redis.port=6379 #redis连接池设置 spring.redis.pool.max-idle=8 spring.redis.pool.min-idle=0 spring.redis.pool.max-active=8 spring.redis.pool.max-wait=-1 #spring.redis.sentinel.master= #spring.redis.sentinel.nodes= spring.redis.timeout=60000注：win平台，下载一个，修改密码，就可直接运行

3、运行测试

在浏览器中先输入

http://localhost:8080/set?key=lxh2&&value=1001

再输入

http://localhost:8080/get?key=lxh2

再改改value的值试试

三、使用RedisTemplate

1、在包com.example下建立文件夹domain

2、在domain中建议类person

package com.example.domain;

import java.io.Serializable;

public class Person implements Serializable {

    private static final long serialVersionUID = 1L;

    private String id;
    private String name;
    private Integer age;


    public Person() {
        super();
    }


    public Person(String id, String name, Integer age) {
        super();
        this.id = id;
        this.name = name;
        this.age = age;
    }
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Integer getAge() {
        return age;
    }
    public void setAge(Integer age) {
        this.age = age;
    }

}

注意：一定有空的和全字段的构造函数

3、在domain中建立类PersonDao

package com.example.domain;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Repository;

@Repository
public class PersonDao {

    @Autowired
    RedisTemplate<Object,Object> redisTemplate;

    @Resource(name="redisTemplate")
    ValueOperations<Object,Object> valOps;

    public void save(Person person){
        valOps.set(person.getId(), person);
    }

    public Person getPerson(String id){
        return (Person) valOps.get(id);
    }   
}

4、在Web中建立类ObjectRedisController

package com.example.web;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.example.domain.Person;
import com.example.domain.PersonDao;

@RestController
public class ObjectRedisController {

    protected static Logger logger=LoggerFactory.getLogger(ObjectRedisController.class);

    @Autowired
    PersonDao personDao;

    @RequestMapping("/setPerson")
    public void set(String id,String name,Integer age){
        logger.debug("访问setPerson:id={},name={},age={}",id,name,age);
        Person person=new Person(id,name,age);
        personDao.save(person);
    }

    @RequestMapping("/getPerson")
    public Person getPerson(String id){
        return personDao.getPerson(id);
    }

}

5、运行测试

http://localhost:8080/setPerson?id=2&&name=lxh2&&age=2

http://localhost:8080/getPerson?id=2