案例21 基于Spring Boot+Redis实现图书信息按书号存储案例

1. 案例需求

基于Spring Boot+Redis实现图书信息按书号存储和取出功能，数据存储至Redis。

2. 创建Spring Boot项目

创建Spring Boot项目，项目名称为springboot-redis02。

3. 选择依赖

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pom.xml文件内容如下所示：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.0</version>
        <relativePath/>
    </parent>
    <groupId>com.wfit</groupId>
    <artifactId>Spring Boot-redis</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>Spring Boot-redis</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <!--redis-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <!--spring-boot-starter-web-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

4. 创建配置文件

resources目录下创建application.yml。

server:
  port: 8090
spring:
  redis:
    host: localhost
    port: 6379
    database: 0

5. 创建Constants常量类

com.wfit.boot.commons目录下创建Constants.java。

public class Constants {
    // 默认成功码
    public static final int SUCCESS_CODE = 200;
    public static final String SUCCESS_MSG = "操作成功";
    // 默认失败码
    public static final int ERROR_CODE = 500;
    public static final String ERROR_MSG = "系统异常";
}

6. 创建Result类

com.wfit.boot.commons目录下创建Result.java。

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Result<T> {

    //响应码
    private int code;
    //响应消息
    private String msg;
    //响应结果
    private T data;

    public static <T> Result<T> success(T data){
        return new Result<>(Constants.SUCCESS_CODE,Constants.SUCCESS_MSG,data);
    }

    public static <T> Result<T> error(T data){
        return new Result<>(Constants.ERROR_CODE,Constants.ERROR_MSG,data);
    }
    
}

7. 创建Book实体类

com.wfit.boot.model目录下创建Book.java。

@Data
public class Book implements Serializable {
    
    private String id;
    private String name;
    private String author;
    
}

8. 创建BookController类

com.wfit.boot.controller目录下创建BookController.java。

@RestController
@RequestMapping("/book")
public class BookController {

    @Autowired
    private BookService bookService;
    /**
     * 新增图书信息
     * @param book
     * @return
     */
    @PostMapping("/add")
    public Result addBook(@RequestBody Book book){
        bookService.addBook(book);
        return Result.success("新增图书信息成功！");
    }
    /**
     * 查询图书信息
     */
    @GetMapping("/query")
    public Result query(String id){
        Book book = bookService.queryBook(id);
        return Result.success(book);
    }
}

9. 创建BookService接口

com.wfit.boot.service目录下创建BookService.java。

public interface BookService {

    public void addBook(Book book);
    public Book queryBook(String id);

}

10. 创建BookServiceImpl类

com.wfit.boot.service.impl目录下创建BookServiceImpl.java。

@Service
public class StudentServiceImpl implements StudentService {

    @Resource
    private RedisTemplate<String,Object> redisTemplate;

    @Override
    public void addStudent(Student student) {
        redisTemplate.opsForValue().set(student.getId(),student);
    }
    @Override
    public Student queryStudent(String id) {
        return (Student)redisTemplate.opsForValue().get(id);
    }
}

11. 案例测试

• 测试新增图书信息

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• 测试查询图书信息

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