相关疑难解决方法(0)

使用spring,我在通过java阅读我的yaml时遇到了问题.让我先说明代码

@Component
@EnableConfigurationProperties
@ConfigurationProperties(prefix = "countries")
public class UserLimitReader {

    private HashMap<String, Integer> orders;

    private HashMap<String, Integer> requests;

    public HashMap<String, Integer> getOrders() {
        return orders;
    }

    public void setOrderRedeemableLimit(HashMap<String, Integer>         orders) 
{
        this.orders= orders;
}

public HashMap<String, Integer> getRequests() {
    return requests;
}

public void setMonthlyRedeemableLimit(HashMap<String, Integer> requests) {
    this.requests= requests;
}
}

我的yaml文件:

cassandra:
    hosts: localhost:9142, 127.0.0.1:9142
    keyspace: test
countries:
    orders:
      JPY: 1000
      USD: 1000
    requests:
      JPY: 100000
      USD: 100000

spring context xml也有这个:

<bean id="yamlProperties"
    class="org.springframework.beans.factory.config.YamlPropertiesFactoryBean">
    <property name="resources">
        <value>classpath:config/application.yaml</value> …

属性文件如下所示：

url1=path_to_binary1
url2=path_to_binary2

根据这个我尝试以下方法：

@Component
@EnableConfigurationProperties
public class ApplicationProperties {
    private Map<String, String> pathMapper;

    //get and set
}

在另一个组件中，我自动连接了ApplicationProperties：

@Autowired
private ApplicationProperties properties;         
      //inside some method:
      properties.getPathMapper().get(appName);

产生NullPointerException。

如何纠正？

更新

我有正确的根据user7757360的建议：

@Component
@EnableConfigurationProperties
@ConfigurationProperties(prefix="app")
public class ApplicationProperties {

和属性文件：

app.url1=path_to_binary1
app.url2=path_to_binary2

仍然不起作用

更新2

@Component
@EnableConfigurationProperties
@ConfigurationProperties(prefix="app")
public class ApplicationProperties {
    private Map<String, String> app;

里面application.properties：

app.url1=path_to_binary1
app.url2=path_to_binary2

仍然不起作用