java.util.Properties#loadFromXML ( )源码实例Demo

public Void call() throws IOException {
    while (!done) {

        // store as XML format
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        props.storeToXML(out, null, "UTF-8");

        // load from XML format
        Properties p = new Properties();
        ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
        p.loadFromXML(in);

        // check that the properties are as expected
        if (!p.equals(props))
            throw new RuntimeException("Properties not equal");
    }
    return null;
}
 

private PluginConfigurator loadConfig1() {
    Properties config = new Properties();

    if (new File(CONFIG_FILENAME).exists()) {
        try {
            FileInputStream input = new FileInputStream(CONFIG_FILENAME);
            try {
                config.loadFromXML(input);
            } finally {
                input.close();
            }
        } catch (IOException e) {
            log.error("Unable to load configuration file " + CONFIG_FILENAME, e);
        }

        log.debug("Configuration loaded: " + config);
    }

    PluginConfigurator configurator = new PluginConfigurator(config);
    configurator.configureAll(null);
    return configurator;
}
 

public Void call() throws IOException {
    while (!done) {

        // store as XML format
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        props.storeToXML(out, null, "UTF-8");

        // load from XML format
        Properties p = new Properties();
        ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
        p.loadFromXML(in);

        // check that the properties are as expected
        if (!p.equals(props))
            throw new RuntimeException("Properties not equal");
    }
    return null;
}
 

public Void call() throws IOException {
    while (!done) {

        // store as XML format
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        props.storeToXML(out, null, "UTF-8");

        // load from XML format
        Properties p = new Properties();
        ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
        p.loadFromXML(in);

        // check that the properties are as expected
        if (!p.equals(props))
            throw new RuntimeException("Properties not equal");
    }
    return null;
}
 

protected Map<String, String> getAttributes(final TarArchiveInputStream stream) throws IOException {

        final Properties props = new Properties();
        props.loadFromXML(new NonCloseableInputStream(stream));

        final Map<String, String> result = new HashMap<>();
        for (final Entry<Object, Object> entry : props.entrySet()) {
            final Object keyObject = entry.getKey();
            final Object valueObject = entry.getValue();
            if (!(keyObject instanceof String)) {
                throw new IOException("Flow file attributes object contains key of type "
                        + keyObject.getClass().getCanonicalName()
                        + " but expected java.lang.String");
            } else if (!(keyObject instanceof String)) {
                throw new IOException("Flow file attributes object contains value of type "
                        + keyObject.getClass().getCanonicalName()
                        + " but expected java.lang.String");
            }

            final String key = (String) keyObject;
            final String value = (String) valueObject;
            result.put(key, value);
        }

        return result;
    }
 

public Void call() throws IOException {
    while (!done) {

        // store as XML format
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        props.storeToXML(out, null, "UTF-8");

        // load from XML format
        Properties p = new Properties();
        ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
        p.loadFromXML(in);

        // check that the properties are as expected
        if (!p.equals(props))
            throw new RuntimeException("Properties not equal");
    }
    return null;
}
 

public Void call() throws IOException {
    while (!done) {

        // store as XML format
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        props.storeToXML(out, null, "UTF-8");

        // load from XML format
        Properties p = new Properties();
        ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
        p.loadFromXML(in);

        // check that the properties are as expected
        if (!p.equals(props))
            throw new RuntimeException("Properties not equal");
    }
    return null;
}
 

/**
 * <p>The specified stream remains open after this method returns.
 * @param in
 * @param systemId
 * @throws IOException
 */
public void loadProperties(@NotNull InputStream in, @NotNull String systemId)
        throws IOException {
    Properties props = new Properties();
    // prevent the input stream from being closed for achieving a consistent behaviour
    props.loadFromXML(new CloseShieldInputStream(in));
    setProperties(props);
    log.trace("Loaded properties from {}.", systemId);
}
 

static void loadPropertyFile(String filename) {
    try (InputStream in = new FileInputStream(filename)) {
        Properties prop = new Properties();
        prop.loadFromXML(in);
        verifyProperites(prop);
    } catch (IOException ex) {
        fail(ex.getMessage());
    }
}
 

/**
 * Load all properties from the specified class path resource
 * (in ISO-8859-1 encoding), using the given class loader.
 * <p>Merges properties if more than one resource of the same name
 * found in the class path.
 * @param resourceName the name of the class path resource
 * @param classLoader the ClassLoader to use for loading
 * (or {@code null} to use the default class loader)
 * @return the populated Properties instance
 * @throws IOException if loading failed
 */
public static Properties loadAllProperties(String resourceName, ClassLoader classLoader) throws IOException {
	Assert.notNull(resourceName, "Resource name must not be null");
	ClassLoader classLoaderToUse = classLoader;
	if (classLoaderToUse == null) {
		classLoaderToUse = ClassUtils.getDefaultClassLoader();
	}
	Enumeration<URL> urls = (classLoaderToUse != null ? classLoaderToUse.getResources(resourceName) :
			ClassLoader.getSystemResources(resourceName));
	Properties props = new Properties();
	while (urls.hasMoreElements()) {
		URL url = urls.nextElement();
		URLConnection con = url.openConnection();
		ResourceUtils.useCachesIfNecessary(con);
		InputStream is = con.getInputStream();
		try {
			if (resourceName != null && resourceName.endsWith(XML_FILE_EXTENSION)) {
				props.loadFromXML(is);
			}
			else {
				props.load(is);
			}
		}
		finally {
			is.close();
		}
	}
	return props;
}
 

@Override
public Properties loadFromXML(String xml, Properties defaults)
        throws IOException {
    final ByteArrayInputStream bais = new ByteArrayInputStream(xml.getBytes("UTF-8"));
    Properties p = new Properties(defaults);
    p.loadFromXML(bais);
    return p;
}
 

public void loadProperties(File f, boolean system, boolean forceNew) {
	if (f == null || !f.exists()) {
		alert("[" + f.getAbsolutePath() + "] " + getResource("error.not.exists", "is not exists."));
		return;
	}
	BufferedInputStream bin = null;
	try {
		Properties props = new Properties();
		if (system) {
			props.load(bin = new BufferedInputStream(new FileInputStream(f)));
			if (IOSImageUtil.isExecutableJarFile(this)) {
				this.setCheckForUpdatesOnStartUp(IOSImageUtil.getBoolProperty(props, "system.check.for.updates.on.startup", true));
			}
			if (forceNew) {
				props.put("system.last.properties.file", "");
			}
		} else {
			props.loadFromXML(bin = new BufferedInputStream(new FileInputStream(f)));
		}
		this.applyProperties(props, system);
		if (system) {
			applySystemProperties(props);
		} else {
			this.setPropertiesFile(f);
		}
	} catch (Throwable t) {
		handleThrowable(t);
	} finally {
		if (bin != null) {
			try { bin.close(); } catch (Exception ex) { ex.printStackTrace(); }
		}
	}
}
 

/**
 * Load the properties for external utilities from a XML file
 */
private void loadExternal() {
	Properties properties = new Properties();
	try {
		properties.loadFromXML(new FileInputStream(PROPERTIES_PATH));
		for (String key : properties.stringPropertyNames()) {
			externalSupport.put(key, properties.getProperty(key));
		}
	} catch (IOException ignore) {
	}
}
 

static void loadPropertyFile(String filename) {
    try (InputStream in = new FileInputStream(filename)) {
        Properties prop = new Properties();
        prop.loadFromXML(in);
        verifyProperites(prop);
    } catch (IOException ex) {
        fail(ex.getMessage());
    }
}
 

@Test
public void givenPropertyValue_whenXMLPropertiesFileLoaded_thenCorrect() throws IOException {
 
    String rootPath = Thread.currentThread().getContextClassLoader().getResource("").getPath();
    String iconConfigPath = rootPath + "icons.xml";
    Properties iconProps = new Properties();
    iconProps.loadFromXML(new FileInputStream(iconConfigPath));
    
    assertEquals("icon1.jpg", iconProps.getProperty("fileIcon"));
}
 

static void loadPropertyFile(String filename) {
    try (InputStream in = new FileInputStream(filename)) {
        Properties prop = new Properties();
        prop.loadFromXML(in);
        verifyProperites(prop);
    } catch (IOException ex) {
        fail(ex.getMessage());
    }
}
 

Properties convertXMLToProperties(String xmlString) {
    Properties properties = new Properties();
    try (InputStream in = new ByteArrayInputStream(xmlString.getBytes())) {
        properties.loadFromXML(in);
    } catch (IOException e) {
        LOGGER.logError(Log4jLogger.SYSTEM_LOG, e,
                LogMessageIdentifier.ERROR);
    }
    return properties;
}
 

@Override
public Properties loadFromXML(String xml, Properties defaults)
        throws IOException {
    final ByteArrayInputStream bais = new ByteArrayInputStream(xml.getBytes("UTF-8"));
    Properties p = new Properties(defaults);
    p.loadFromXML(bais);
    return p;
}
 

/**
 * Decompress a resource.
 * @param order Byte order.
 * @param provider Strings provider
 * @param content The resource content to uncompress.
 * @return A fully uncompressed resource.
 * @throws IOException
 */
public byte[] decompressResource(ByteOrder order, StringsProvider provider,
        byte[] content) throws IOException {
    Objects.requireNonNull(order);
    Objects.requireNonNull(provider);
    Objects.requireNonNull(content);
    CompressedResourceHeader header;
    do {
        header = CompressedResourceHeader.readFromResource(order, content);
        if (header != null) {
            ResourceDecompressor decompressor =
                    pluginsCache.get(header.getDecompressorNameOffset());
            if (decompressor == null) {
                String pluginName =
                        provider.getString(header.getDecompressorNameOffset());
                if (pluginName == null) {
                    throw new IOException("Plugin name not found");
                }
                String storedContent = header.getStoredContent(provider);
                Properties props = new Properties();
                if (storedContent != null) {
                    try (ByteArrayInputStream stream
                            = new ByteArrayInputStream(storedContent.
                                    getBytes(StandardCharsets.UTF_8));) {
                        props.loadFromXML(stream);
                    }
                }
                decompressor = ResourceDecompressorRepository.
                        newResourceDecompressor(props, pluginName);
                if (decompressor == null) {
                    throw new IOException("Plugin not found: " + pluginName);
                }

                pluginsCache.put(header.getDecompressorNameOffset(), decompressor);
            }
            try {
                content = decompressor.decompress(provider, content,
                        CompressedResourceHeader.getSize(), header.getUncompressedSize());
            } catch (Exception ex) {
                throw new IOException(ex);
            }
        }
    } while (header != null);
    return content;
}
 

/**
 * Create a new instance and load the translations from the given input
 * stream.
 */
XMLResourceBundle(final InputStream stream) throws IOException {
	props = new Properties();
	props.loadFromXML(stream);
}