java - 如何在实用程序类中使用 Guice 而不是静态方法来配置依赖注入(inject)？

Question

我想从实用程序类中删除static内容:

public final class PropertiesUtils {

    public static Properties loadProperties(String propFilePath) throws IOException { 
        Properties properties = new Properties();
        try (InputStream in = new FileInputStream(propFilePath)) {
            properties.load(in);
        }
        return properties;
    }

我在一个地方使用它:

public class HiveJdbcClient {
    public HiveJdbcClient() {
        initHiveCredentials();
    }

    private void initHiveCredentials() {
        try {
            Properties prop = PropertiesUtils.loadProperties(FileLocations.HIVE_CONFIG_PROPERTIES.getFileLocation());

我已经实现了一些GuiceModulel:

public class GuiceModel extends AbstractModule {    
    @Override
    protected void configure() {
        bind(XpathEvaluator.class).in(Singleton.class);
        bind(HiveJdbcClient.class).in(Singleton.class);
        bind(QueryConstructor.class).in(Singleton.class);
    }
}

我无法理解如何使用 Guice 在此方法中消除静态内容？

我想要下一个签名；

public Properties loadProperties(String propFilePath)

而不是:

public static Properties loadProperties(String propFilePath)

Answer 1

只需将 PropertiesUtils 绑定(bind)添加到 GuiceModel 即可，如下所示:

bind(PropertiesUtils.class).in(Singleton.class);

PropertiesUtils.class

public class PropertiesUtils {

public Properties loadProperties(String propFilePath) throws IOException { 
    Properties properties = new Properties();
    try (InputStream in = new FileInputStream(propFilePath)) {
        properties.load(in);
    }
    return properties;
}

HiveClient.class << 注入(inject) PropertiesUtils

public class HiveJdbcClient {
private final PropertiesUtils props;

@Inject
public HiveJdbcClient(PropertiesUtils props) {
    this.props = props;
    initHiveCredentials();
}

private void initHiveCredentials() {
    try {
        Properties prop = props.loadProperties(FileLocations.HIVE_CONFIG_PROPERTIES.getFileLocation());