全球聚焦：Spring Cloud Task 任务开发-定义任务输入和输出（一）

$ java -jar my-task.jar --my.param=hello

@Componentpublic class MyTask implements CommandLineRunner {    @Value("${my.param}")    private String myParam;    @Override    public void run(String... args) throws Exception {        // ...    }}

$ export MY_PARAM=hello$ java -jar my-task.jar

@Componentpublic class MyTask implements CommandLineRunner {    @Value("${MY_PARAM}")    private String myParam;    @Override    public void run(String... args) throws Exception {        // ...    }}

$ java -jar my-task.jar --my.file=/path/to/file.xml

@Componentpublic class MyTask implements CommandLineRunner {    @Value("${my.file}")    private String myFile;    @Override    public void run(String... args) throws Exception {        File file = new File(myFile);        // ...    }}

$ java -jar my-task.jar --spring.datasource.url=jdbc:mysql://localhost:3306/mydb

@Componentpublic class MyTask implements CommandLineRunner {    @Autowired    private DataSource dataSource;    @Override    public void run(String... args) throws Exception {        try (Connection conn = dataSource.getConnection()) {            // ...        }    }}