Java JavaCompiler.getStandardFileManager方法代码示例

import javax.tools.JavaCompiler; //导入方法依赖的package包/类
/**
 * Compile the provided class. The className may have a package separated by /. For example:
 * my/package/myclass
 * 
 * @param className Name of the class to compile.
 * @param classCode Plain text contents of the class
 * @return The byte contents of the compiled class.
 * @throws IOException
 */
public byte[] compileClass(final String className, final String classCode) throws IOException {
  ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

  JavaCompiler javaCompiler = ToolProvider.getSystemJavaCompiler();
  OutputStreamJavaFileManager<JavaFileManager> fileManager =
      new OutputStreamJavaFileManager<JavaFileManager>(
          javaCompiler.getStandardFileManager(null, null, null), byteArrayOutputStream);

  List<JavaFileObject> fileObjects = new ArrayList<JavaFileObject>();
  fileObjects.add(new JavaSourceFromString(className, classCode));

  List<String> options = Arrays.asList("-classpath", this.classPath);
  DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<JavaFileObject>();
  if (!javaCompiler.getTask(null, fileManager, diagnostics, options, null, fileObjects).call()) {
    StringBuilder errorMsg = new StringBuilder();
    for (Diagnostic d : diagnostics.getDiagnostics()) {
      String err = String.format("Compilation error: Line %d - %s%n", d.getLineNumber(),
          d.getMessage(null));
      errorMsg.append(err);
      System.err.print(err);
    }
    throw new IOException(errorMsg.toString());
  }
  return byteArrayOutputStream.toByteArray();
}
 

import javax.tools.JavaCompiler; //导入方法依赖的package包/类
void run() throws IOException {
    String lineSep = System.getProperty("line.separator");
    JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
    try (StandardJavaFileManager fm = compiler.getStandardFileManager(null, null, null);
         StringWriter out = new StringWriter();
         PrintWriter outWriter = new PrintWriter(out)) {
        Iterable<? extends JavaFileObject> input =
                fm.getJavaFileObjects(System.getProperty("test.src") + "/ReleaseOption.java");
        List<String> options = Arrays.asList("--release", "7", "-XDrawDiagnostics");

        compiler.getTask(outWriter, fm, null, options, null, input).call();
        String expected =
                "ReleaseOption.java:9:49: compiler.err.doesnt.exist: java.util.stream" + lineSep +
                "1 error" + lineSep;
        if (!expected.equals(out.toString())) {
            throw new AssertionError("Unexpected output: " + out.toString());
        }
    }
}
 

import javax.tools.JavaCompiler; //导入方法依赖的package包/类
public void testJavac() throws Exception {
    final JavaCompiler jc = ToolProvider.getSystemJavaCompiler();
    final StandardJavaFileManager fm = jc.getStandardFileManager(
            null,
            Locale.ENGLISH,
            Charset.forName("UTF-8"));  //NOI18N
    fm.setLocation(
            StandardLocation.CLASS_PATH,
            Collections.singleton(FileUtil.archiveOrDirForURL(mvCp.entries().get(0).getURL())));
    Iterable<JavaFileObject> res = fm.list(
            StandardLocation.CLASS_PATH,
            "", //NOI18N
            EnumSet.of(JavaFileObject.Kind.CLASS),
            true);
    assertEquals(3, StreamSupport.stream(res.spliterator(), false).count());
}
 

import javax.tools.JavaCompiler; //导入方法依赖的package包/类
private void compile(String option, Path destDir, Path... files)
        throws IOException
{
    System.err.println("compile...");
    JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
    try (StandardJavaFileManager fm = compiler.getStandardFileManager(null, null, null)) {
        Iterable<? extends JavaFileObject> fileObjects =
            fm.getJavaFileObjectsFromPaths(Arrays.asList(files));

        List<String> options = new ArrayList<>();
        if (option != null) {
            options.add(option);
        }
        if (destDir != null) {
            options.add("-d");
            options.add(destDir.toString());
        }
        options.add("-cp");
        options.add(System.getProperty("test.classes", "."));

        JavaCompiler.CompilationTask task =
            compiler.getTask(null, fm, null, options, null, fileObjects);
        if (!task.call())
            throw new AssertionError("compilation failed");
    }
}
 

import javax.tools.JavaCompiler; //导入方法依赖的package包/类
@Test
public void getLocation_ISA(Path base) throws Exception {
    Path src1 = base.resolve("src1");
    tb.writeJavaFiles(src1.resolve("m1x"), "module m1x { }", "package a; class A { }");
    Path src2 = base.resolve("src2");
    tb.writeJavaFiles(src2.resolve("m2x").resolve("extra"), "module m2x { }", "package b; class B { }");
    Path modules = base.resolve("modules");
    tb.createDirectories(modules);

    String FS = File.separator;
    String PS = File.pathSeparator;
    JavaCompiler c = ToolProvider.getSystemJavaCompiler();
    try (StandardJavaFileManager fm = c.getStandardFileManager(null, null, null)) {
        fm.handleOption("--module-source-path",
                List.of(src1 + PS + src2 + FS + "*" + FS + "extra").iterator());

        try {
            Iterable<? extends Path> paths = fm.getLocationAsPaths(StandardLocation.MODULE_SOURCE_PATH);
            out.println("result: " + asList(paths));
            throw new Exception("expected IllegalStateException not thrown");
        } catch (IllegalStateException e) {
            out.println("Exception thrown, as expected: " + e);
        }

        // even if we can't do getLocation for the MODULE_SOURCE_PATH, we should be able
        // to do getLocation for the modules, which will additionally confirm the option
        // was effective as intended.
        Location locn1 = fm.getLocationForModule(StandardLocation.MODULE_SOURCE_PATH, "m1x");
        checkLocation(fm.getLocationAsPaths(locn1), List.of(src1.resolve("m1x")));
        Location locn2 = fm.getLocationForModule(StandardLocation.MODULE_SOURCE_PATH, "m2x");
        checkLocation(fm.getLocationAsPaths(locn2), List.of(src2.resolve("m2x").resolve("extra")));
    }
}
 

import javax.tools.JavaCompiler; //导入方法依赖的package包/类
@Test
public void setLocation(Path base) throws Exception {
    Path src = base.resolve("src");
    tb.writeJavaFiles(src.resolve("m1x"), "module m1x { }", "package a; class A { }");
    Path modules = base.resolve("modules");
    tb.createDirectories(modules);

    JavaCompiler c = ToolProvider.getSystemJavaCompiler();
    try (StandardJavaFileManager fm = c.getStandardFileManager(null, null, null)) {
        fm.setLocationFromPaths(StandardLocation.MODULE_SOURCE_PATH, List.of(src));
        new JavacTask(tb)
                .options("-XDrawDiagnostics")
                .fileManager(fm)
                .outdir(modules)
                .files(findJavaFiles(src))
                .run()
                .writeAll();

        checkFiles(modules.resolve("m1x/module-info.class"), modules.resolve("m1x/a/A.class"));
    }
}
 

import javax.tools.JavaCompiler; //导入方法依赖的package包/类
public static boolean compile(Path source, Path destination, String... options) throws IOException {
    JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
    try (StandardJavaFileManager jfm = compiler.getStandardFileManager(null, null, null)) {
        List<Path> sources
                = Files.find(source, Integer.MAX_VALUE,
                (file, attrs) -> file.toString().endsWith(".java"))
                .collect(Collectors.toList());

        Files.createDirectories(destination);
        jfm.setLocationFromPaths(StandardLocation.CLASS_OUTPUT, Collections.singleton(destination));

        List<String> opts = Arrays.asList(options);
        JavaCompiler.CompilationTask task
                = compiler.getTask(null, jfm, null, opts, null,
                jfm.getJavaFileObjectsFromPaths(sources));
        List<String> list = new ArrayList<>(opts);
        list.addAll(sources.stream()
                .map(Path::toString)
                .collect(Collectors.toList()));
        System.err.println("javac options: " + optionsPrettyPrint(list.toArray(new String[list.size()])));
        return task.call();
    }
}
 

import javax.tools.JavaCompiler; //导入方法依赖的package包/类
/**
 * Compile the specified module from the given module sourcepath
 *
 * All warnings/errors emitted by the compiler are output to System.out/err.
 *
 * @return true if the compilation is successful
 *
 * @throws IOException if there is an I/O error scanning the source tree or
 *                     creating the destination directory
 */
public static boolean compileModule(Path source, Path destination,
                                    String moduleName, String... options) {
    JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
    StandardJavaFileManager jfm = compiler.getStandardFileManager(null, null, null);

    try {
        Files.createDirectories(destination);
        jfm.setLocationFromPaths(StandardLocation.CLASS_OUTPUT,
                                 Arrays.asList(destination));
    } catch (IOException e) {
        throw new UncheckedIOException(e);
    }

    Stream<String> opts = Arrays.stream(new String[] {
        "--module-source-path", source.toString(), "-m", moduleName
    });
    List<String> javacOpts = Stream.concat(opts, Arrays.stream(options))
                                    .collect(Collectors.toList());
    JavaCompiler.CompilationTask task
        = compiler.getTask(null, jfm, null, javacOpts, null, null);
    return task.call();
}
 

import javax.tools.JavaCompiler; //导入方法依赖的package包/类
public void compile(JavaCompiler javaCompiler, Writer out, File sourceDirectory, File outputDirectory, List<File> classpath, DiagnosticListener<? super JavaFileObject> diagnosticListener, String targetVersion ) {
    targetVersion = targetVersion == null ? "1.6" : targetVersion;

    StandardJavaFileManager fileManager = javaCompiler.getStandardFileManager(null, null, null);

    if (outputDirectory != null) {
        try {
            fileManager.setLocation(StandardLocation.CLASS_OUTPUT,
                    Arrays.asList(outputDirectory));
            fileManager.setLocation(StandardLocation.CLASS_PATH, classpath);
        } catch (IOException e) {
            throw new RuntimeException("could not set output directory", e);
        }
    }

    Iterable<? extends JavaFileObject> compilationUnits = fileManager.getJavaFileObjectsFromFiles(findAllSourceFiles(sourceDirectory));

    ArrayList<String> options = new ArrayList<String>();
    options.add("-source");
    options.add(targetVersion);
    options.add("-target");
    options.add(targetVersion);
    options.add("-encoding");
    options.add("UTF8");
    options.add("-Xlint:-options");
    options.add("-Xlint:unchecked");
    if (compilationUnits.iterator().hasNext()) {
        Boolean success = javaCompiler.getTask(out, fileManager, diagnosticListener, options, null, compilationUnits).call();
        assertThat("Compilation was not successful, check stdout for errors", success, is(true));
    }

}
 

import javax.tools.JavaCompiler; //导入方法依赖的package包/类
public static void main(String... args) throws Exception {
    //create default shared JavaCompiler - reused across multiple compilations
    JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
    try (StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null)) {

        for (CastKind ck : CastKind.values()) {
            for (TypeKind t1 : TypeKind.values()) {
                for (ArrayKind ak1 : ArrayKind.values()) {
                    Type typ1 = new Type(t1, ak1);
                    if (ck.nBounds == 1) {
                        new IntersectionTypeParserTest(ck, typ1).run(comp, fm);
                        continue;
                    }
                    for (TypeKind t2 : TypeKind.values()) {
                        for (ArrayKind ak2 : ArrayKind.values()) {
                            Type typ2 = new Type(t2, ak2);
                            if (ck.nBounds == 2) {
                                new IntersectionTypeParserTest(ck, typ1, typ2).run(comp, fm);
                                continue;
                            }
                            for (TypeKind t3 : TypeKind.values()) {
                                for (ArrayKind ak3 : ArrayKind.values()) {
                                    Type typ3 = new Type(t3, ak3);
                                    new IntersectionTypeParserTest(ck, typ1, typ2, typ3).run(comp, fm);
                                }
                            }
                        }
                    }
                }
            }
        }
        System.out.println("Total check executed: " + checkCount);
    }
}
 

import javax.tools.JavaCompiler; //导入方法依赖的package包/类
public static void main(String... args) throws Exception {
    //create default shared JavaCompiler - reused across multiple compilations
    JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
    try (StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null)) {

        for (CastInfo cInfo : allCastInfo()) {
            for (ExpressionKind ek : ExpressionKind.values()) {
                new IntersectionTargetTypeTest(cInfo, ek).run(comp, fm);
            }
        }
        System.out.println("Total check executed: " + checkCount);
    }
}
 

import javax.tools.JavaCompiler; //导入方法依赖的package包/类
private static void compile(List<String> options, Iterable<File> files) throws IOException {
    JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
    StandardJavaFileManager mgr = compiler.getStandardFileManager(null, null, null);
    List<String> fullOptions = new ArrayList<String>(options);
    fullOptions.addAll(Arrays.asList("-source", "1.5", "-target", "1.5"));
    if (!compiler.getTask(null, mgr, null, fullOptions, null, mgr.getJavaFileObjectsFromFiles(files)).call()) {
        throw new IOException("compilation failed");
    }
}
 

import javax.tools.JavaCompiler; //导入方法依赖的package包/类
/**
 * Compile all the java sources in {@code <source>/**} to
 * {@code <destination>/**}. The destination directory will be created if
 * it doesn't exist.
 *
 * All warnings/errors emitted by the compiler are output to System.out/err.
 *
 * @return true if the compilation is successful
 *
 * @throws IOException
 *         if there is an I/O error scanning the source tree or
 *         creating the destination directory
 * @throws UnsupportedOperationException
 *         if there is no system java compiler
 */
public static boolean compile(Path source, Path destination, String... options)
    throws IOException
{
    JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
    if (compiler == null) {
        // no compiler available
        throw new UnsupportedOperationException("Unable to get system java compiler. "
                + "Perhaps, jdk.compiler module is not available.");
    }
    StandardJavaFileManager jfm = compiler.getStandardFileManager(null, null, null);

    List<Path> sources
        = Files.find(source, Integer.MAX_VALUE,
            (file, attrs) -> (file.toString().endsWith(".java")))
            .collect(Collectors.toList());

    Files.createDirectories(destination);
    jfm.setLocation(StandardLocation.CLASS_PATH, Collections.emptyList());
    jfm.setLocationFromPaths(StandardLocation.CLASS_OUTPUT,
            Collections.singletonList(destination));

    List<String> opts = Arrays.asList(options);
    JavaCompiler.CompilationTask task
        = compiler.getTask(null, jfm, null, opts, null,
            jfm.getJavaFileObjectsFromPaths(sources));

    return task.call();
}
 

import javax.tools.JavaCompiler; //导入方法依赖的package包/类
public static IPreviewProvider getPreviewProvider(File sourceFile) {
	JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
	File tmpDir = new File(System.getProperty("java.io.tmpdir"));
	try (StandardJavaFileManager fileManager = compiler
			.getStandardFileManager(null, null, null)) {
		Iterable javaFiles = fileManager.getJavaFileObjects(sourceFile);
		fileManager.setLocation(StandardLocation.CLASS_OUTPUT, Arrays.asList(tmpDir));
		List<String> options = Arrays.asList("-d", tmpDir.getAbsolutePath());
		compiler.getTask(null, fileManager, null, null, null, javaFiles)
				.call();
	} catch (IOException e) {
		LOGGER.log(Level.SEVERE, "Error during runtime compilation", e);
	}

	try {
		URL[] urls = new URL[]{new URL("file://" + tmpDir + "/")};
		System.out.println(urls[0].toString());
		URLClassLoader ucl = new URLClassLoader(urls);
		Class clazz = ucl.loadClass("pl.gda.pg.eti.kernelhive.gui.component.workflow.preview.PreviewProvider");
		System.out.println("Class has been successfully loaded");

		IPreviewProvider provider = (IPreviewProvider) clazz.newInstance();
		return provider;
	} catch (MalformedURLException | ClassNotFoundException | InstantiationException | IllegalAccessException ex) {
		Logger.getLogger(RuntimeClassFactory.class.getName())
				.log(Level.SEVERE, "Error while creating PreviewProider", ex);
		return null;
	}
}
 

import javax.tools.JavaCompiler; //导入方法依赖的package包/类
public static void main(String[] args) {
  System.out.println("Sourcepath is " + args[0]);
  // We're interested in scanning all .java files under the sourcepath passed as an argument here.
  List<File> sourceFiles = Arrays.asList(new File(new File(args[0]).getAbsolutePath()).listFiles(f -> f.getName().endsWith(".java")));
  sourceFiles.stream().forEach(System.out::println); // Printing the detected class file paths.
  JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
  StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, null);
  Iterable<? extends JavaFileObject> javaFileObjects = fileManager.getJavaFileObjectsFromFiles(sourceFiles);
  JavaCompiler.CompilationTask task = compiler.getTask(null, fileManager, null, null, null, javaFileObjects);
  task.setProcessors(Arrays.asList(new PrivateOnlyAnnotationProcessor(), new JavaBeanAnnotationProcessor()));
  System.out.println(task.call());
}