org.springframework.core.io.support.EncodedResource# getReader ( ) 源码实例Demo

public static void main(String[] args) throws IOException {
    String currentJavaFilePath = System.getProperty("user.dir") + "/thinking-in-spring/resource/src/main/java/org/geekbang/thinking/in/spring/resource/EncodedFileSystemResourceDemo.java";
    File currentJavaFile = new File(currentJavaFilePath);
    // FileSystemResource => WritableResource => Resource
    FileSystemResource fileSystemResource = new FileSystemResource(currentJavaFilePath);
    EncodedResource encodedResource = new EncodedResource(fileSystemResource, "UTF-8");
    // 字符输入流
    // 字符输入流
    try (Reader reader = encodedResource.getReader()) {
        System.out.println(IOUtils.toString(reader));
    }
}
 

static String getContent(Resource resource, String encoding) throws IOException {
    EncodedResource encodedResource = new EncodedResource(resource, encoding);
    // 字符输入流
    try (Reader reader = encodedResource.getReader()) {
        return IOUtils.toString(reader);
    }
}
 

public static void main(String[] args) throws IOException {
    String currentJavaFilePath = "/" + System.getProperty("user.dir") + "/thinking-in-spring/resource/src/main/java/org/geekbang/thinking/in/spring/resource/EncodedFileSystemResourceLoaderDemo.java";
    // 新建一个 FileSystemResourceLoader 对象
    FileSystemResourceLoader resourceLoader = new FileSystemResourceLoader();
    // FileSystemResource => WritableResource => Resource
    Resource resource = resourceLoader.getResource(currentJavaFilePath);
    EncodedResource encodedResource = new EncodedResource(resource, "UTF-8");
    // 字符输入流
    try (Reader reader = encodedResource.getReader()) {
        System.out.println(IOUtils.toString(reader));
    }
}
 

/**
 * Read a script from the provided EncodedResource, using the supplied line
 * comment prefix, and build a String containing the lines.
 *
 * @param resource
 *            the resource (potentially associated with a specific encoding) to
 *            load the SQL script from
 * @param lineCommentPrefix
 *            the prefix that identifies comments in the SQL script (typically
 *            "--")
 * @return a String containing the script lines
 */
private static String readScript(EncodedResource resource, String lineCommentPrefix) throws IOException
{
    LineNumberReader lineNumberReader = new LineNumberReader(resource.getReader());
    try
    {
        return readScript(lineNumberReader, lineCommentPrefix);
    }
    finally
    {
        lineNumberReader.close();
    }
}
 

/**
 * Read a script from the provided resource, using the supplied comment prefix
 * and statement separator, and build a {@code String} containing the lines.
 * <p>Lines <em>beginning</em> with the comment prefix are excluded from the
 * results; however, line comments anywhere else &mdash; for example, within
 * a statement &mdash; will be included in the results.
 * @param resource the {@code EncodedResource} containing the script
 * to be processed
 * @param commentPrefix the prefix that identifies comments in the SQL script
 * (typically "--")
 * @param separator the statement separator in the SQL script (typically ";")
 * @param blockCommentEndDelimiter the <em>end</em> block comment delimiter
 * @return a {@code String} containing the script lines
 * @throws IOException in case of I/O errors
 */
private static String readScript(EncodedResource resource, @Nullable String commentPrefix,
		@Nullable String separator, @Nullable String blockCommentEndDelimiter) throws IOException {

	LineNumberReader lnr = new LineNumberReader(resource.getReader());
	try {
		return readScript(lnr, commentPrefix, separator, blockCommentEndDelimiter);
	}
	finally {
		lnr.close();
	}
}
 

/**
 * Read a script from the provided resource, using the supplied comment prefix
 * and statement separator, and build a {@code String} containing the lines.
 * <p>Lines <em>beginning</em> with the comment prefix are excluded from the
 * results; however, line comments anywhere else &mdash; for example, within
 * a statement &mdash; will be included in the results.
 * @param resource the {@code EncodedResource} containing the script
 * to be processed
 * @param commentPrefix the prefix that identifies comments in the SQL script
 * (typically "--")
 * @param separator the statement separator in the SQL script (typically ";")
 * @param blockCommentEndDelimiter the <em>end</em> block comment delimiter
 * @return a {@code String} containing the script lines
 * @throws IOException in case of I/O errors
 */
private static String readScript(EncodedResource resource, @Nullable String commentPrefix,
		@Nullable String separator, @Nullable String blockCommentEndDelimiter) throws IOException {

	LineNumberReader lnr = new LineNumberReader(resource.getReader());
	try {
		return readScript(lnr, commentPrefix, separator, blockCommentEndDelimiter);
	}
	finally {
		lnr.close();
	}
}
 

/**
 * Read a script from the provided resource, using the supplied comment prefix
 * and statement separator, and build a {@code String} containing the lines.
 * <p>Lines <em>beginning</em> with the comment prefix are excluded from the
 * results; however, line comments anywhere else &mdash; for example, within
 * a statement &mdash; will be included in the results.
 * @param resource the {@code EncodedResource} containing the script
 * to be processed
 * @param commentPrefix the prefix that identifies comments in the SQL script &mdash;
 * typically "--"
 * @param separator the statement separator in the SQL script &mdash; typically ";"
 * @return a {@code String} containing the script lines
 * @throws IOException in case of I/O errors
 */
private static String readScript(EncodedResource resource, String commentPrefix, String separator)
		throws IOException {

	LineNumberReader lnr = new LineNumberReader(resource.getReader());
	try {
		return readScript(lnr, commentPrefix, separator);
	}
	finally {
		lnr.close();
	}
}
 

/**
 * Read a script from the provided resource, using the supplied comment prefix
 * and statement separator, and build a {@code String} containing the lines.
 * <p>Lines <em>beginning</em> with the comment prefix are excluded from the
 * results; however, line comments anywhere else &mdash; for example, within
 * a statement &mdash; will be included in the results.
 * @param resource the {@code EncodedResource} containing the script
 * to be processed
 * @param commentPrefix the prefix that identifies comments in the SQL script &mdash;
 * typically "--"
 * @param separator the statement separator in the SQL script &mdash; typically ";"
 * @return a {@code String} containing the script lines
 * @throws IOException in case of I/O errors
 */
private static String readScript(EncodedResource resource, String commentPrefix, String separator)
		throws IOException {

	LineNumberReader lnr = new LineNumberReader(resource.getReader());
	try {
		return readScript(lnr, commentPrefix, separator);
	}
	finally {
		lnr.close();
	}
}
 

/**
 * Read a script from the provided resource, using the supplied comment prefix
 * and statement separator, and build a {@code String} containing the lines.
 * <p>Lines <em>beginning</em> with the comment prefix are excluded from the
 * results; however, line comments anywhere else &mdash; for example, within
 * a statement &mdash; will be included in the results.
 * @param resource the {@code EncodedResource} containing the script
 * to be processed
 * @param commentPrefix the prefix that identifies comments in the SQL script &mdash;
 * typically "--"
 * @param separator the statement separator in the SQL script &mdash; typically ";"
 * @return a {@code String} containing the script lines
 * @throws IOException in case of I/O errors
 */
private static String readScript(EncodedResource resource, String commentPrefix, String separator)
		throws IOException {

	LineNumberReader lnr = new LineNumberReader(resource.getReader());
	try {
		return readScript(lnr, commentPrefix, separator);
	}
	finally {
		lnr.close();
	}
}
 

/**
 * Read a script from the provided resource, using the supplied comment prefix
 * and statement separator, and build a {@code String} containing the lines.
 * <p>Lines <em>beginning</em> with the comment prefix are excluded from the
 * results; however, line comments anywhere else &mdash; for example, within
 * a statement &mdash; will be included in the results.
 * @param resource the {@code EncodedResource} containing the script
 * to be processed
 * @param commentPrefix the prefix that identifies comments in the SQL script &mdash;
 * typically "--"
 * @param separator the statement separator in the SQL script &mdash; typically ";"
 * @return a {@code String} containing the script lines
 * @throws IOException in case of I/O errors
 */
private static String readScript(EncodedResource resource, String commentPrefix, String separator)
		throws IOException {
	LineNumberReader lnr = new LineNumberReader(resource.getReader());
	try {
		return readScript(lnr, commentPrefix, separator);
	}
	finally {
		lnr.close();
	}
}