SpringBoot--获取application.properties中的自定义的值

柔光的暖阳◎ 2022-05-16 23:39 189阅读 0赞

目录结构：

![70][]

这里的pom文件：

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
        <name>chapter-2-spring-boot-config</name>
        <description>《Spring Boot 2.x 核心技术实战 - 上 基础篇》第 2 章《Spring Boot 配置》Demo</description>
    
        <groupId>demo.springboot</groupId>
        <artifactId>chapter-2-spring-boot-config</artifactId>
        <version>1.0</version>
        <packaging>jar</packaging>
    
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.0.0.BUILD-SNAPSHOT</version>
        </parent>
    
        <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
            <java.version>1.8</java.version>
        </properties>
    
        <dependencies>
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>com.spring4all</groupId>
                <artifactId>spring-boot-starter-swagger</artifactId>
                <version>1.5.1.RELEASE</version>
            </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>
                    <version>1.5.1.RELEASE</version>
                </plugin>
    
            </plugins>
        </build>
    
    
        <repositories>
            <repository>
                <id>spring-snapshots</id>
                <name>Spring Snapshots</name>
                <url>https://repo.spring.io/libs-snapshot</url>
                <snapshots>
                    <enabled>true</enabled>
                </snapshots>
            </repository>
        </repositories>
    
    </project>

application.properties：

## 书信息
    demo.book.name=老人与海
    demo.book.writer=海明威
    demo.book.description=${demo.book.writer}'s${demo.book.name}
    
    
    server.tomcat.uri-encoding=UTF-8
    spring.http.encoding.charset=UTF-8
    spring.http.encoding.enabled=true
    spring.http.encoding.force=true
    spring.messages.encoding=UTF-8

BookComponent：

package demo.springboot.config;
    
    import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.stereotype.Component;
    import org.springframework.validation.annotation.Validated;
    
    import javax.validation.constraints.NotEmpty;
    import javax.validation.constraints.NotNull;
    
    /**
     * 书属性
     *
     */
    @Component
    @ConfigurationProperties(prefix = "demo.book")
    @Validated
    public class BookComponent {
    
        /**
         * 书名
         */
        @NotEmpty
        private String name;
    
        /**
         * 作者
         */
        @NotNull
        private String writer;
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public String getWriter() {
            return writer;
        }
    
        public void setWriter(String writer) {
            this.writer = writer;
        }
    }

BookProperties：

package demo.springboot.config;
    
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.stereotype.Component;
    
    /**
     * 书属性
     *
     * Created by bysocket on 27/09/2017.
     */
    @Component
    public class BookProperties {
    
        /**
         * 书名
         */
        @Value("${demo.book.name}")
        private String name;
    
        /**
         * 作者
         */
        @Value("${demo.book.writer}")
        private String writer;
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public String getWriter() {
            return writer;
        }
    
        public void setWriter(String writer) {
            this.writer = writer;
        }
    }

HelloBookController：

package demo.springboot.web;
    
    import demo.springboot.config.BookProperties;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    /**
     * Spring Boot Hello案例
     *
     * Created by bysocket on 26/09/2017.
     */
    @RestController
    public class HelloBookController {
    
        @Autowired
        BookProperties bookProperties;
    
        @GetMapping("/book/hello")
        public String sayHello() {
            return "Hello， " + bookProperties.getWriter() + " is writing "
                    + bookProperties.getName() + " ！";
        }
    }

ConfigApplication：

package demo.springboot;
    
    import com.spring4all.swagger.EnableSwagger2Doc;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    /**
     * Spring Boot 应用启动类
     *
     * Created by bysocket on 26/09/2017.
     */
    @EnableSwagger2Doc // 开启 Swagger
    @SpringBootApplication
    public class ConfigApplication {
        public static void main(String[] args) {
            SpringApplication.run(ConfigApplication.class, args);
        }
    }

出现乱码的解决方案：

![70 1][]

[70]: /images/20220517/d6dae884eb1e4ac2952a88020dac44ed.png
[70 1]: /images/20220517/37a5ff6821e64aa7942f06941923cdaa.png