Java Code Examples for java.io.PrintWriter

/**
 * Logs a message and an exception to the specified log destination.
 * 
 * @param msgLevel
 *                a string representation of the level
 * @param msg
 *                the actual message to log
 * @param ex
 *                the actual Exception to log
 */
@Override
protected void put(int msgLevel, String msg, Throwable ex) {
  String exceptionText = null;
  if (ex != null) {
    StringWriter sw = new StringWriter();
    PrintWriter pw = new PrintWriter(sw);
    ex.printStackTrace(pw);
    pw.close();
    try {
      sw.close();
    }
    catch (IOException ignore) {
    }
    exceptionText = sw.toString();
  }
  put(msgLevel, new Date(), this.connectionName, getThreadName(),
      getThreadId(), msg, exceptionText);
}
 

@Override
public void printDebugLog(PrintWriter writer) {
	print(writer, "\tType: " + name);
	print(writer, "\tPackage: " + this.getParentPkg().getName());
	print(writer, "\tAccess: " + accessModifier);
	print(writer, "\tInterface: " + isInterface);
	print(writer, "\tAbstract: " + isAbstract);
	print(writer, "\tSupertypes: " + ((getSuperTypes().size() != 0) ? getSuperTypes().get(0).getName() : "Object"));
	print(writer, "\tNested class: " + nestedClass);
	if (nestedClass)
		print(writer, "\tContainer class: " + containerClass.getName());
	print(writer, "\tReferenced types: ");
	for (SM_Type type:referencedTypeList)
		print(writer, "\t\t" + type.getName());
	for (SM_Field field : fieldList)
		field.printDebugLog(writer);
	for (SM_Method method : methodList)
		method.printDebugLog(writer);
	print(writer, "\t----");
}
 

public static void writeConceptFile(File f, Collection<Concept> concepts,
        String msg) throws FileNotFoundException {

    PrintWriter w = new PrintWriter(f);
    w.append("<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n");
    w.append("<!-- generated by ConceptFileWriter on " + nowToHuman()
            + " -->\n");
    if (msg != null && msg.length() > 0) {
        w.append("<!--  " + escape(msg) + " -->\n");
    }
    w.append("<synonym>\n");

    for (Concept c : concepts) {

        w.format("<token canonical=\"%s\" ref_id=\"%s\">\n",
                escape(c.canonical), escape(c.id));

        for (String v : c.variants) {
            w.format("  <variant base=\"%s\" />\n", escape(v));
        }
        w.append("</token>\n");
    }
    w.append("</synonym>\n");
    w.close();
}
 

private static String getRootCause(Throwable t) {
  if (t.getCause() == null) {
    StringWriter sw = new StringWriter();
    t.printStackTrace(new PrintWriter(sw));
    return sw.toString();
  }
  else {
    return getRootCause(t.getCause());
  }
}
 

@Override
public void generateMetaInfo(Map<String, SortedSet<String>> metaInfo) throws IOException {
    String dirName = CLDRConverter.DESTINATION_DIR + File.separator + "sun" + File.separator + "util" + File.separator
            + "cldr" + File.separator;
    File dir = new File(dirName);
    if (!dir.exists()) {
        dir.mkdirs();
    }
    File file = new File(dir, METAINFO_CLASS + ".java");
    if (!file.exists()) {
        file.createNewFile();
    }
    CLDRConverter.info("Generating file " + file);

    try (PrintWriter out = new PrintWriter(file, "us-ascii")) {
        out.println(CopyrightHeaders.getOpenJDKCopyright());

        out.println("package sun.util.cldr;\n\n"
                  + "import java.util.ListResourceBundle;\n");
        out.printf("public class %s extends ListResourceBundle {\n", METAINFO_CLASS);
        out.println("    @Override\n" +
                    "    protected final Object[][] getContents() {\n" +
                    "        final Object[][] data = new Object[][] {");
        for (String key : metaInfo.keySet()) {
            out.printf("            { \"%s\",\n", key);
            out.printf("              \"%s\" },\n", toLocaleList(metaInfo.get(key)));
        }
        out.println("        };\n        return data;\n    }\n}");
    }
}
 

@Override
public void printStackTrace(PrintWriter s) {
    super.printStackTrace(s);
    if (cause != null) {
        s.println("\nCAUSE:\n");
        cause.printStackTrace(s);
    }
}
 

/**
 * Formats the throwable as per {@link Throwable#printStackTrace()}.
 *
 * @param thrown The throwable to format.
 * @return A string containing the contents of {@link Throwable#printStackTrace()}.
 */
public static String formatException(Throwable thrown) {
  if (thrown == null) {
    return null;
  }
  StringWriter sw = new StringWriter();
  try (PrintWriter pw = new PrintWriter(sw)) {
    thrown.printStackTrace(pw);
  }
  return sw.toString();
}
 

@Override
protected void writeLoginPageLink(ServletContext context, HttpServletRequest req, HttpServletResponse resp)
        throws IOException
{
    resp.setContentType("text/html; charset=UTF-8");
    resp.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
    
    try (PrintWriter out = resp.getWriter())
    {
        out.println("<html><head>");
        // Removed the auto refresh to avoid refresh loop, MNT-16931
        // Removed the link to the login page, MNT-20200
        out.println("</head><body><p>Login failed. Please try again.</p>");
        out.println("</body></html>");
    }
}
 

private void writeRDFHeader(Model model, PrintWriter writer) {
	String xmlns = xmlnsDecl();
	writer.print("<" + rdfEl("RDF") + xmlns);
	if (null != xmlBase && xmlBase.length() > 0)
		writer.print("\n  xml:base=" + substitutedAttribute(xmlBase));
	writer.println(" > ");
}
 

@Test
public void generatesSpringServerSourceFilesFromRadl() throws IOException {
  String lower = "f";
  String upper = lower.toUpperCase(Locale.getDefault());
  String name = RANDOM.string();
  Document radlDocument = RadlBuilder.aRadlDocument()
      .withResource()
          .named(lower + name)
      .end()
  .build();
  try (PrintWriter writer = new PrintWriter(radlFile, "UTF8")) {
    writer.print(Xml.toString(radlDocument));
  }
  String packagePrefix = somePackage();
  String generatedSourceSetDir = someSourceSetDir();
  String mainSourceSetDir = someSourceSetDir();
  SourceCodeManagementSystem scm = mock(SourceCodeManagementSystem.class);
  String header = RANDOM.string();

  generator.generate(radlFile, baseDir, packagePrefix, generatedSourceSetDir, mainSourceSetDir, scm, header);

  Collection<File> files = generatedFiles();
  File controller = find(files, upper + name + "Controller.java");
  assertNotNull("Missing controller: " + files, controller);
  String expectedPath = expectedFilePath(generatedSourceSetDir, packagePrefix, lower + name, controller);
  assertEquals("Controller path", expectedPath, controller.getAbsolutePath());
  JavaCode javaCode = toJava(controller);
  TestUtil.assertCollectionEquals("Header for " + controller.getName(), Arrays.asList(header),
      javaCode.fileComments());

  File controllerSupport = find(files, upper + name + "ControllerSupport.java");
  assertNotNull("Missing controller support: " + files, controllerSupport);
  expectedPath = expectedFilePath(mainSourceSetDir, packagePrefix, lower + name, controllerSupport);
  assertEquals("Controller support path", expectedPath, controllerSupport.getAbsolutePath());
}
 

static String toErrorMessage( final File file, final Exception ex ) {
  final StringWriter sw = new StringWriter();
  sw.write("Could not read ");
  sw.write(file.getAbsolutePath());
  sw.write(":\n");
  ex.printStackTrace(new PrintWriter(sw));
  return sw.toString();
}
 

protected LineWriter(Context context) {
    context.put(LineWriter.class, this);
    Options options = Options.instance(context);
    indentWidth = options.indentWidth;
    tabColumn = options.tabColumn;
    out = context.get(PrintWriter.class);
    buffer = new StringBuilder();
}
 

public void debug(int offset, PrintWriter out) {
    int idx = 0;
    for (Iterator<CSVField> i = iFields.iterator(); i.hasNext();) {
        CSVField field = i.next();
        if (field == null || field.toString().length() == 0)
            continue;
        for (int j = 0; j < offset; j++)
            out.print(" ");
        out.println(iHeader.getField(idx) + "=" + (iQuotationMark == null ? "" : iQuotationMark) + field
                + (iQuotationMark == null ? "" : iQuotationMark));
    }
}
 

/**
 * Difference writing to file
 * 
 * @param f
 *            file outputstream
 * @param ch
 *            code point
 * @param method
 *            for testing
 * @param ucharval
 *            UCharacter value after running method
 * @param charval
 *            Character value after running method
 */
private static void trackDifference(PrintWriter f, int ch, String method, String ucharval, String charval)
        throws Exception {
    if (m_hashtable_.containsKey(method)) {
        Integer value = m_hashtable_.get(method);
        m_hashtable_.put(method, new Integer(value.intValue() + 1));
    } else
        m_hashtable_.put(method, new Integer(1));

    String temp = Integer.toHexString(ch);
    StringBuffer s = new StringBuffer(temp);
    for (int i = 0; i < 6 - temp.length(); i++)
        s.append(' ');
    temp = UCharacter.getExtendedName(ch);
    if (temp == null)
        temp = " ";
    s.append(temp);
    for (int i = 0; i < 73 - temp.length(); i++)
        s.append(' ');

    s.append(method);
    for (int i = 0; i < 27 - method.length(); i++)
        s.append(' ');
    s.append(ucharval);
    for (int i = 0; i < 11 - ucharval.length(); i++)
        s.append(' ');
    s.append(charval);
    f.println(s.toString());
}
 

@Test
public void queryInterface_orFilter_printsMatchedEntities() throws Exception {
  // Arrange
  Entity a = new Entity("Person", "a");
  a.setProperty("height", 100);
  Entity b = new Entity("Person", "b");
  b.setProperty("height", 150);
  Entity c = new Entity("Person", "c");
  c.setProperty("height", 200);
  datastore.put(ImmutableList.<Entity>of(a, b, c));

  StringWriter buf = new StringWriter();
  PrintWriter out = new PrintWriter(buf);
  long minHeight = 125;
  long maxHeight = 175;

  // Act
  // [START gae_java8_datastore_interface_3]
  Filter tooShortFilter = new FilterPredicate("height", FilterOperator.LESS_THAN, minHeight);

  Filter tooTallFilter = new FilterPredicate("height", FilterOperator.GREATER_THAN, maxHeight);

  Filter heightOutOfRangeFilter = CompositeFilterOperator.or(tooShortFilter, tooTallFilter);

  Query q = new Query("Person").setFilter(heightOutOfRangeFilter);
  // [END gae_java8_datastore_interface_3]

  // Assert
  List<Entity> results =
      datastore.prepare(q.setKeysOnly()).asList(FetchOptions.Builder.withDefaults());
  assertWithMessage("query results").that(results).containsExactly(a, c);
}
 

/**
 * Create a PrintWriter and use to to send output via DriverManager.println
 * Validate that if you disable the writer, the output sent is not present
 */
@Test
public void tests18() throws Exception {
    CharArrayWriter cw = new CharArrayWriter();
    PrintWriter pw = new PrintWriter(cw);
    DriverManager.setLogWriter(pw);
    assertTrue(DriverManager.getLogWriter() == pw);

    DriverManager.println(results[0]);
    DriverManager.setLogWriter(null);
    assertTrue(DriverManager.getLogWriter() == null);
    DriverManager.println(noOutput);
    DriverManager.setLogWriter(pw);
    DriverManager.println(results[1]);
    DriverManager.println(results[2]);
    DriverManager.println(results[3]);
    DriverManager.setLogWriter(null);
    DriverManager.println(noOutput);

    /*
     * Check we do not get the output when the stream is disabled
     */
    BufferedReader reader
            = new BufferedReader(new CharArrayReader(cw.toCharArray()));
    for (String result : results) {
        assertTrue(result.equals(reader.readLine()));
    }
}
 

@Test
public void lexError() throws Exception {
  String input = "\\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuu00not-actually-a-unicode-escape-sequence";

  StringWriter stdout = new StringWriter();
  StringWriter stderr = new StringWriter();
  Main main = new Main(new PrintWriter(stdout, true), new PrintWriter(stderr, true), System.in);

  Path tmpdir = testFolder.newFolder().toPath();
  Path path = tmpdir.resolve("InvalidSyntax.java");
  Files.write(path, input.getBytes(UTF_8));

  int result = main.format(path.toString());
  assertThat(stdout.toString()).isEmpty();
  assertThat(stderr.toString())
      .contains("InvalidSyntax.java:1:35: error: illegal unicode escape");
  assertThat(result).isEqualTo(1);
}
 

@Override
public void handle(String target, Request baseRequest, HttpServletRequest request,
                   HttpServletResponse response) throws IOException, ServletException {
    baseRequest.setHandled(true);

    if ("Get".equalsIgnoreCase(request.getMethod())) {
        String headerValue = request.getHeader("Foo");
        response.setHeader("dynamicHeader", request.getHeader("dynamicHeader"));
        final int status = Integer.valueOf(target.substring("/status".length() + 1));
        response.setStatus(status);
        response.setContentLength(headerValue.length());
        response.setContentType("text/plain");

        try (PrintWriter writer = response.getWriter()) {
            writer.print(headerValue);
            writer.flush();
        }
    } else {
        response.setStatus(404);
        response.setContentType("text/plain");
        response.setContentLength(0);
    }
}
 

private static PrintWriter getPrintWriterForWriter(Writer w) {
    if (w == null)
        return getPrintWriterForStream(null);
    else if (w instanceof PrintWriter)
        return (PrintWriter) w;
    else
        return new PrintWriter(w, true);
}
 

@Test
public void testNodesBlockRender() throws Exception {
  injector.getInstance(NodesBlock.class).render();
  PrintWriter writer = injector.getInstance(PrintWriter.class);
  WebAppTests.flushOutput(injector);

  Mockito.verify(writer,
      Mockito.times(numberOfActualTableHeaders + numberOfThInMetricsTable))
      .print("<th");
  Mockito.verify(
      writer,
      Mockito.times(numberOfRacks * numberOfNodesPerRack
          * numberOfActualTableHeaders + numberOfThInMetricsTable)).print(
      "<td");
}
 

@RequestMapping(params="wechat", method = RequestMethod.POST)
public void wechatPost(HttpServletResponse response,
		HttpServletRequest request,
		@RequestParam(value = "msg_signature") String msg_signature,
		@RequestParam(value = "timestamp") String timestamp,
		@RequestParam(value = "nonce") String nonce) throws Exception {
	try {
		String sReqData = MessageUtil.readStrFromInputStream(request);
		Map<String, String> dealMap = MessageUtil.parseXml(sReqData);
		String appid = dealMap.get("AgentID");
		String corpid = dealMap.get("ToUserName");
		String sEncryptMsg = "";
		QywxAgent appInfo = qywxAgentDao.getQywxAgentByCorpidAndAppid(corpid, appid);
		WXBizMsgCrypt wxcpt = new WXBizMsgCrypt(appInfo.getToken(),appInfo.getEncodingAESKey(),corpid);
		String sMsg = wxcpt.DecryptMsg(msg_signature, timestamp, nonce, sReqData);
		logger.info("[WECHAT]", "wechat msg:\n{}", new Object[]{sMsg});
		String respMessage = weixinCoreService.processRequest(sMsg);
		logger.info("[WECHAT]", "wechat resmsg:\n{}", new Object[]{respMessage});
		sEncryptMsg = wxcpt.EncryptMsg(respMessage, timestamp, nonce);
		logger.info("[WECHAT]", "wechat EncryptMsg:\n{}", new Object[]{sEncryptMsg});
		PrintWriter out = response.getWriter();
		out.print(sEncryptMsg);
		out.close();
	} catch (Exception e) {
		e.printStackTrace();
	}
}
 

@Command("detail")
public void detail(final Map<String, String> param,
                   final PrintWriter writer) throws ModuleException {
    final String uniqueId = param.get("id");
    if (StringUtils.isBlank(uniqueId)) {
        // 如果参数不对，则认为找不到对应的沙箱模块，返回400
        writer.println("id parameter was required.");
        return;
    }

    final Module module = moduleManager.get(uniqueId);
    if (null == module) {
        writer.println(String.format("module[id=%s] is not existed.", uniqueId));
        return;
    }

    final Information info = module.getClass().getAnnotation(Information.class);
    final boolean isActivated = moduleManager.isActivated(info.id());
    final int cCnt = moduleManager.cCnt(info.id());
    final int mCnt = moduleManager.mCnt(info.id());
    final File jarFile = moduleManager.getJarFile(info.id());
    String sb = "" +
            "      ID : " + info.id() + "\n" +
            " VERSION : " + info.version() + "\n" +
            "  AUTHOR : " + info.author() + "\n" +
            "JAR_FILE : " + jarFile.getPath() + "\n" +
            "   STATE : " + (isActivated ? "ACTIVE" : "FROZEN") + "\n" +
            "    MODE : " + ArrayUtils.toString(info.mode()) + "\n" +
            "   CLASS : " + module.getClass().getName() + "\n" +
            "  LOADER : " + module.getClass().getClassLoader() + "\n" +
            "    cCnt : " + cCnt + "\n" +
            "    mCnt : " + mCnt;

    output(writer, sb);

}
 

@Test
public void testSkewedJoin() throws Exception {
    PrintWriter w = new PrintWriter(new FileWriter(PIG_FILE));
    w.println("A = load '" + INPUT_FILE + "';");
    w.println("B = load '" + EMPTY_DIR + "';");
    w.println("C = join B by $0, A by $0 using 'skewed';");
    w.println("store C into '" + OUTPUT_FILE + "';");
    w.close();
    
    try {
        String[] args = { PIG_FILE };
        PigStats stats = PigRunner.run(args, null);
 
        assertTrue(stats.isSuccessful());
        // the sampler job has zero maps
        MRJobStats js = (MRJobStats)stats.getJobGraph().getSources().get(0);
        
        // This assert fails on 205 due to MAPREDUCE-3606
        if (!Util.isHadoop205()&&!Util.isHadoop1_x())
            assertEquals(0, js.getNumberMaps()); 
        
        FileSystem fs = cluster.getFileSystem();
        FileStatus status = fs.getFileStatus(new Path(OUTPUT_FILE));
        assertTrue(status.isDir());
        assertEquals(0, status.getLen());
        // output directory isn't empty
        assertTrue(fs.listStatus(status.getPath()).length > 0);
    } finally {
        new File(PIG_FILE).delete();
        Util.deleteFile(cluster, OUTPUT_FILE);
    }
}
 

/**
 * <d62023> - delete method templates for valuetypes
 **/
protected void interfaceMethod (Hashtable symbolTable, MethodEntry m, PrintWriter stream)
{
  this.symbolTable = symbolTable;
  this.m           = m;
  this.stream      = stream;
  if (m.comment () != null)
    m.comment ().generate ("  ", stream);
  stream.print ("  ");
  writeMethodSignature ();
  stream.println (";");
}
 

/**
 * Prints the given string tree.
 *
 * @param pw
 *            the writer to be used to print the tree.
 * @param l
 *            a string tree, i.e., a string list that can contain other
 *            string lists, and so on recursively.
 */
static void printList(final PrintWriter pw, final List<?> l) {
    for (int i = 0; i < l.size(); ++i) {
        Object o = l.get(i);
        if (o instanceof List) {
            printList(pw, (List<?>) o);
        } else {
            pw.print(o.toString());
        }
    }
}
 

private static void writeFile(String filename, String content) {
    try {
        PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(filename)));
        out.print(content);
        out.close();
    }
    catch (IOException e) {
        System.out.println("Error writing file: " + e.getMessage());
    }
    
}
 

void init() throws FileNotFoundException {
    writer = new PrintWriter(fileName);
    for (int p = 0; p < this.parameterNames.length; p++) {
        writer.print(this.parameterNames[p] + " ");
    }
    for (int p = 0; p < this.effNames.length; p++) {
        writer.print(this.effNames[p] + " ");
    }
    writer.flush();
}
 

String toJson(JsonObject toJsonFunc) {
    StringWriter stringWriter = new StringWriter();
    JsonWriter jsonWriter = Json.createWriter(new PrintWriter(stringWriter));
    jsonWriter.writeObject(toJsonFunc);
    jsonWriter.close();
    return stringWriter.toString();
}
 

String compile() throws IOException {

            // Create a class that references classId
            File explicit = new File("ExplicitClass.java");
            FileWriter filewriter = new FileWriter(explicit);
            filewriter.append("class ExplicitClass { " + classId + " implicit; }");
            filewriter.close();

            StringWriter sw = new StringWriter();

            com.sun.tools.javac.Main.compile(new String[] {
                    "-verbose",
                    option.optionString,
                    "-source", "8", "-target", "8",
                    "-sourcepath", Dir.SOURCE_PATH.file.getPath(),
                    "-classpath", Dir.CLASS_PATH.file.getPath(),
                    "-Xbootclasspath/p:" + Dir.BOOT_PATH.file.getPath(),
                    "-d", XPreferTest.OUTPUT_DIR.getPath(),
                    explicit.getPath()
            }, new PrintWriter(sw));

            return sw.toString();
        }
 

@Test
public void testExceptionIdlgen() throws Exception {

    try {
        String fileName = getClass().getResource("/idlgen/exceptions.wsdl").toString();
        idlgen.setWsdlFile(fileName);

        idlgen.setBindingName("TestException.ExceptionTestCORBABinding");
        idlgen.setOutputFile("exceptiontypes.idl");
        idlgen.setPrintWriter(new PrintWriter(idloutput));
        idlgen.generateIDL(null);

        InputStream origstream = getClass().getResourceAsStream("/idlgen/expected_exceptions.idl");
        byte[] orig = inputStreamToBytes(origstream);

        checkIDLStrings(orig, idloutput.toByteArray());
    } finally {
        new File("exceptiontypes.idl").deleteOnExit();
    }
}