Springcloud学习笔记51--@Configuration+@Bean实现自动化装配，解决第三方jar中类bean交给spring管理

1.@Configuration+@Bean编写配置类

此时，第三方类为DataSource；

/**
 * @Author lucky
 * @Date 2022/4/1 9:18
 * 配置数据库连接池，注入DataSource
 */
@Configuration
public class DruidConfig {
    @Autowired
    private DataSourceProperties dataSourceProperties;

    @Bean
    public DataSource druidDataSource(){
        DruidDataSource druidDataSource=new DruidDataSource();
        druidDataSource.setDriverClassName(dataSourceProperties.getDriverClassName());
        druidDataSource.setUrl(dataSourceProperties.getUrl());
        druidDataSource.setUsername(dataSourceProperties.getUsername());
        druidDataSource.setPassword(dataSourceProperties.getPassword());
        druidDataSource.setInitialSize(dataSourceProperties.getInitialSize());
        druidDataSource.setMinIdle(dataSourceProperties.getMinIdle());
        druidDataSource.setMaxActive(dataSourceProperties.getMaxActive());
        druidDataSource.setMaxWait(dataSourceProperties.getMaxWait());
        druidDataSource.setTimeBetweenEvictionRunsMillis(dataSourceProperties.getTimeBetweenEvictionRunsMillis());
        druidDataSource.setMinEvictableIdleTimeMillis(dataSourceProperties.getMinEvictableIdleTimeMillis());
        druidDataSource.setValidationQuery(dataSourceProperties.getValidationQuery());
        druidDataSource.setTestWhileIdle(dataSourceProperties.isTestWhileIdle());
        druidDataSource.setTestOnBorrow(dataSourceProperties.isTestOnBorrow());
        druidDataSource.setTestOnReturn(dataSourceProperties.isTestOnReturn());

        try {
            druidDataSource.init();
        } catch (SQLException e) {
            e.printStackTrace();
        }

        return druidDataSource;
    }

}

2.测试案例

@RestController
@RequestMapping("/hello")
@Api
public class HelloController {
    @Autowired
    DruidConfig druidConfig;

    @PostMapping("/login")
    @ApiOperation(value = "你好")
    public void login(@RequestParam @ApiParam(name="name",value="对话人",required=true) String name){
        DataSource dataSource = druidConfig.druidDataSource();
        DataSource dataSource2 = druidConfig.druidDataSource();

        System.out.println("hello!"+name);

    }
}

通过自动装配，生成的DataSource被spring托管的，单例模式；