我有两个项目,一个具有DAO类和Model,另一个具有Rest Controller

项目A:DAO类和模型

项目B:休息控制器



项目A

application.properties:

spring.abcDatasource.url=
spring.abcDatasource.username=
spring.abcDatasource.password=
spring.abcDatasource.driver-class-name=oracle.jdbc.driver.OracleDriver


spring.xyzDatasource.url=
spring.xyzDatasource.username=
spring.xyzDatasource.password=
spring.xyzDatasource.driver-class-name=oracle.jdbc.driver.OracleDriver


spring.datasource.initialize=false


DBConfiguration.java

@Configuration
public class DBConfiguration {

    @Primary
    @Bean(name = "abcDS")
    @ConfigurationProperties(prefix = "spring.abcDatasource")
    public DataSource abcDS() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "abcJdbc")
    public JdbcTemplate abcJdbcTemplate(@Qualifier("abcDS") DataSource abcDS) {
        return new JdbcTemplate(abcDS);
    }

    @Bean(name = "xyzDS")
    @ConfigurationProperties(prefix = "spring.xyzDatasource")
    public DataSource xyzDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "xyzJdbc")
    public JdbcTemplate ebsJdbcTemplate(@Qualifier("xyzDS") DataSource xyzDatasource) {
        return new JdbcTemplate(xyzDatasource);
    }


}


Java的AlphaDAO

@Repository
public class AlphaDAO{

    @Autowired
    @Qualifier("abcJdbc")
    private JdbcTemplate abcJdbc;

    @Autowired
    @Qualifier("xyzJdbc")
    private JdbcTemplate xyzJdbc;

    SqlParameterSource namedParameters;



    public Collection<Alpha> findAll(String owner){

        String sql =  "SELECT * from alpha where OWNER in (:owner)" ;

        NamedParameterJdbcTemplate namedParameterJdbcTemplate = new NamedParameterJdbcTemplate(abcJdbc.getDataSource());


        namedParameters = new MapSqlParameterSource("owner", owner);


        List<Alpha> list  = namedParameterJdbcTemplate.query(sql,namedParameters,
                new BeanPropertyRowMapper(Alpha.class));

        return list;
    }


B项目休息控制器:

AlphaServiceApplication.java

@SpringBootApplication
@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})
public class AlphaServiceApplication extends SpringBootServletInitializer implements WebApplicationInitializer {


    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(AlphaServiceApplication.class);
    }

    public static void main(String[] args) {
        SpringApplication.run(AlphaServiceApplication.class, args);
    }
}


AlphaServiceController.java

@RestController
public class AlphaServiceController {

    private static final Logger logger = LoggerFactory.getLogger(AlphaServiceController.class);

    @Autowired
    AlphaDAO dao;

    @CrossOrigin(origins = "http://localhost:4200")
    @RequestMapping("/alpha")
    public Collection<Alpha> index(@RequestBody String owner) {
        return dao.findAll(owner);
    }


如果我尝试运行rest控制器,则会收到错误提示



申请启动失败



描述:

com.xyz.web.wip.AlphaService.AlphaServiceController中的字段dao需要找不到类型为“ com.xyz.comp.wip.alphaComp.dao.AlphaDAO”的bean。

行动:

考虑在配置中定义类型为“ com.xyz.comp.wip.alphaComp.dao.AlphaDAO”的bean。

最佳答案

您的AlphaDao类没有多大意义,您正在尝试自动连接两个字段,但仍然有一个构造函数。
Spring无法构建对象,因为构造函数上没有限定符。
您既可以进行构造函数注入,也可以进行字段注入,但不要同时使用两者。
我建议使用构造函数注入。

@Repository
public class AlphaDAO{

    private final JdbcTemplate abcJdbc;
    private final JdbcTemplate xyzJdbc;

    @Autowired
    public AlphaDAO(
          @Qualifier("abcJdbc") JdbcTemplate abcJdbc,
          @Qualifier("xyzJdbc") JdbcTemplate xyzJdbc){
        this.abcJdbc = abcJdbc;
        this.xyzJdbc = xyzJdbc;
    }


同时从控制器中删除您的@Bean方法。

07-24 09:49