我想下面的代碼值：DriverClassName，Url，Username，Password從讀取application.properties文件，該怎么做？我正在使用 Spring Boot、Mysql、Hibernate 和 Spring Rest。數據源配置文件 //This is working fine with inline value specified as below (DriverClassName, Url,Username,Password @Configuration @EnableTransactionManagement @EnableJpaRepositories(basePackages = "com.nouhoun.springboot.jwt.integration.repository") public class DatasourceConfig { @Bean public DataSource datasource() throws PropertyVetoException { final DriverManagerDataSource dataSource = new DriverManagerDataSource(); dataSource.setDriverClassName("com.mysql.jdbc.Driver"); dataSource.setUrl("jdbc:mysql://localhost:3306/fdb?createDatabaseIfNotExist=true"); dataSource.setUsername("root"); dataSource.setPassword(""); return dataSource; } .... .... ....
2 回答
溫溫醬
TA貢獻1752條經驗 獲得超4個贊
一旦你定義數據源屬性application.properties中@SpringBootApplication它會自動配置datasource，這樣你就可以刪除DataSource configuration。但是如果你想自定義你的數據源配置，那么下面應該Environment可以讓你訪問屬性：
@Configuration
@PropertySource(value= {"classpath:application.properties"})
public class DatasourceConfig {
@Autowired
Environment environment;
@Bean
public DataSource datasource() throws PropertyVetoException {
final DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(environment.getProperty("spring.datasource.driver-class-name"));
dataSource.setUrl(environment.getProperty("spring.datasource.url"));
dataSource.setUsername(environment.getProperty("spring.datasource.username"));
dataSource.setPassword(environment.getProperty("spring.datasource.password"));
return dataSource;
}
}
或者，如果您不想通過 訪問屬性Environment，則可以通過訪問@Value
@Value("${spring.datasource.driver-class-name}")
private String driverName;
@Value("${spring.datasource.url}")
private String url;
@Value("${spring.datasource.username}")
private String userName;
@Value("${spring.datasource.password}")
private String password;
@Bean
public DataSource datasource() throws PropertyVetoException {
final DriverManagerDataSource dataSource = new DriverManagerDataSource();
dataSource.setDriverClassName(driverName);
dataSource.setUrl(url);
dataSource.setUsername(userName);
dataSource.setPassword(password);
return dataSource;
}
浮云間
TA貢獻1829條經驗 獲得超4個贊
似乎您忘記在 pom.xml 或 build.gradle 中添加依賴項，或者如果您已經添加，則您的構建沒有該依賴項（運行mvn clean install）
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>6.0.6</version>
</dependency>
請添加并重試
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