springboot读取properties文件

@ConfigurationProperties

自定义一个配置类

在配置类中的属性（host,port,username,password,virtual_host会自动被赋值配置文件中以spring.amqp为前缀的属性值）。

注意自定义配置类中的属性名称必须配置文件中的后缀名称一样，如配置文件中有springboot.amqp,host=172.18.1.132,那么在类属性名称必须为host，否则host的赋值为null。

@Component
@ConfigurationProperties(prefix = "spring.amqp")
public class RabbitMQServiceImpl implements RabbitMQService {
    private String host;
    private int port;
    private String username;
    private String password;
    private String virtual_host;
    
    public String getHost() {
        return host;
    }

    public void setHost(String host) {
        this.host = host;
    }

    public int getPort() {
        return port;
    }

    public void setPort(int port) {
        this.port = port;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getVirtual_host() {
        return virtual_host;
    }

    public void setVirtual_host(String virtual_host) {
        this.virtual_host = virtual_host;
    }

}

配置文件中的设置

spring.amqp.host=172.18.8.88
spring.amqp.port=5672
spring.amqp.username=guest
spring.amqp.password=guest
spring.amqp.virtual_host=siid

@Value

@SpringBootApplication
@RestController
public class Applaction {

    @Value("${com.zyd.type}")
    private String type;

    @Value("${com.zyd.title}")
    private String title;
    ...
    }

Environment

@SpringBootApplication
@RestController
public class Applaction {

    @Autowired
    private Environment env;
    
    @Autowired
    private ConfigBeanValue configBeanValue;
 

    @RequestMapping("/env")
    public Map<String, Object> env() throws UnsupportedEncodingException {
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("type", env.getProperty("com.zyd.type2"));
        map.put("title", new String(env.getProperty("com.zyd.title2").getBytes("ISO-8859-1"), "UTF-8"));
        return map;
    }
 
    @RequestMapping(value = "/gateway")
    public String gateway() {
        return "get properties value by ''@Value'' :" +
                //1、使用@Value注解读取
                " name=" + configBeanValue.name +
                " , age=" + configBeanValue.age +
                "<p>get properties value by ''Environment'' :" +
                //2、使用Environment读取
                " , sex=" + env.getProperty("demo.sex") +
                " , address=" + env.getProperty("demo.address");
    }

}

当访问http://localhost:10003/gateway时，直接使用env.getProperty会出现乱码，则可以在application.properties中配置

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

然后修改IntelliJ IDEA，File --> Settings --> Editor --> File Encodings ，将最下方Default encoding for properties files设置为UTF-8，并勾选Transparent native-to-ascii conversion。