Java Code Examples for java.io.StringWriter#flush()

@SuppressWarnings("static-access")
public static String doErrorJSON(HttpServletRequest request,HttpServletResponse response, 
		IMSJSONRequest json, String message, Exception e) 
	throws java.io.IOException 
{
	response.setContentType(APPLICATION_JSON);
	Map<String, Object> jsonResponse = new TreeMap<String, Object>();

	Map<String, String> status = null;
	if ( json == null ) {
		status = IMSJSONRequest.getStatusFailure(message);
	} else {
		status = json.getStatusFailure(message);
		if ( json.base_string != null ) {
			jsonResponse.put("base_string", json.base_string);
		}
	}
	jsonResponse.put(IMSJSONRequest.STATUS, status);
	if ( e != null ) {
		jsonResponse.put("exception", e.getLocalizedMessage());
		try {
			StringWriter sw = new StringWriter();
			PrintWriter pw = new PrintWriter(sw, true);
			e.printStackTrace(pw);
			pw.flush();
			sw.flush();
			jsonResponse.put("traceback", sw.toString() );
		} catch ( Exception f ) {
			jsonResponse.put("traceback", f.getLocalizedMessage());
		}
	}
	Gson gson = new Gson(); 
	String jsonText = gson.toJson(jsonResponse);
	PrintWriter out = response.getWriter();
	out.println(jsonText);
	return jsonText;
}
 

/**
 * Test of main method, of class TestXMLStreamWriter.
 */
@Test
public void testWriteComment() {
    try {
        String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><a:html href=\"http://java.sun.com\"><!--This is comment-->java.sun.com</a:html>";
        XMLOutputFactory f = XMLOutputFactory.newInstance();
        // f.setProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES,
        // Boolean.TRUE);
        StringWriter sw = new StringWriter();
        XMLStreamWriter writer = f.createXMLStreamWriter(sw);
        writer.writeStartDocument("UTF-8", "1.0");
        writer.writeStartElement("a", "html", "http://www.w3.org/TR/REC-html40");
        writer.writeAttribute("href", "http://java.sun.com");
        writer.writeComment("This is comment");
        writer.writeCharacters("java.sun.com");
        writer.writeEndElement();
        writer.writeEndDocument();
        writer.flush();
        sw.flush();
        StringBuffer sb = sw.getBuffer();
        System.out.println("sb:" + sb.toString());
        Assert.assertTrue(sb.toString().equals(xml));
    } catch (Exception ex) {
        Assert.fail("Exception: " + ex.getMessage());
    }
}
 

@Override
public String decompile(InputStream inputStream, String entryName) throws IOException {
  logger.debug("Decompiling... {}", entryName);
  File tempFile = createTempFile(entryName, inputStream);
  tempFile.deleteOnExit();

  String decompiledFileName = getDecompiledFileName(entryName);
  File decompiledFile = new File(decompiledFileName);
  decompiledFile.getParentFile().mkdirs();

  StringWriter pw = new StringWriter();
  try {
    com.strobel.decompiler.Decompiler.decompile(tempFile.getAbsolutePath(), new PlainTextOutput(pw));
  } catch (Exception e) {
    logger.info("Error while decompiling {}. " , entryName);
    throw e;
  }
  pw.flush();

  String decompiledFileContent = pw.toString();
  FileUtils.writeStringToFile(decompiledFile, decompiledFileContent);
  return decompiledFileContent;
}
 

void check(TreePath path, Name name) {
    StringWriter out = new StringWriter();
    DocCommentTree dc = trees.getDocCommentTree(path);
    printer.print(dc, out);
    out.flush();
    String found = out.toString().replace(NEWLINE, "\n");

    // Look for the first block comment after the first occurrence of name
    int start = source.indexOf("\n/*\n", findName(source, name));
    int end = source.indexOf("\n*/\n", start);
    String expect = source.substring(start + 4, end + 1);
    if (!found.equals(expect)) {
        System.err.println("Expect:\n" + expect);
        System.err.println("Found:\n" + found);
        error("AST mismatch for " + name);
    }
}
 

public String generateInsert(Document doc, String name, String desc) throws Exception {
  StringWriter out = new StringWriter();
  
  out.write("<div class=\"example\">\r\n");
  out.write("<p>Example Instance \""+name+"\""+(desc == null ? "" : ": "+Utilities.escapeXml(desc))+"</p>\r\n"); 
  out.write("<pre class=\"xml\">\r\n");

  XhtmlGeneratorAdornerState state = null; // adorner == null ? new XhtmlGeneratorAdornerState("", "") : adorner.getState(this, null, null);
  for (int i = 0; i < doc.getChildNodes().getLength(); i++)
    writeNode(out, doc.getChildNodes().item(i), state, 0);
  
  out.write("</pre>\r\n");
  out.write("</div>\r\n");
  out.flush();
  return out.toString();
}
 

void check(TreePath path, Name name) {
    StringWriter out = new StringWriter();
    DocCommentTree dc = trees.getDocCommentTree(path);
    printer.print(dc, out);
    out.flush();
    String found = out.toString().replace(NEWLINE, "\n");

    // Look for the first block comment after the first occurrence of name
    int start = source.indexOf("\n/*\n", findName(source, name));
    int end = source.indexOf("\n*/\n", start);
    String expect = source.substring(start + 4, end + 1);
    if (!found.equals(expect)) {
        System.err.println("Expect:\n" + expect);
        System.err.println("Found:\n" + found);
        error("AST mismatch for " + name);
    }
}
 

@Override
public void finalHandle(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
    Record record = (Record) request.getAttribute(DB_LOGGER);
    if(record != null){
        DbLogService dbLogService = (DbLogService)SpringUtils.getApplicationContext().getBean("dbLogService");
        if(ex != null){
            StringWriter stackTrace = new StringWriter();
            ex.printStackTrace(new PrintWriter(stackTrace));
            stackTrace.flush();
            record.set("status", "1");
            record.set("trace", stackTrace.toString());
        }

        long start = record.getLong("cost");
        record.set("cost", (System.currentTimeMillis() - start) / 1000); // 单位：s
        dbLogService.saveLog(record);
    }
}
 

void check(TreePath path, Name name) {
    StringWriter out = new StringWriter();
    DocCommentTree dc = trees.getDocCommentTree(path);
    printer.print(dc, out);
    out.flush();
    String found = out.toString().replace(NEWLINE, "\n");

    // Look for the first block comment after the first occurrence of name
    int start = source.indexOf("\n/*\n", findName(source, name));
    int end = source.indexOf("\n*/\n", start);
    String expect = source.substring(start + 4, end + 1);
    if (!found.equals(expect)) {
        System.err.println("Expect:\n" + expect);
        System.err.println("Found:\n" + found);
        error("AST mismatch for " + name);
    }
}
 

public static String loadTemplate(String templateName) {
    try (InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream(templateName)) {
        if (is == null) {
            throw new IllegalStateException("unable to find " + templateName);
        }
        try (InputStreamReader reader = new InputStreamReader(is, StandardCharsets.UTF_8);
             BufferedReader bufferedReader = new BufferedReader(reader)) {
            StringWriter writer = new StringWriter();
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                writer.append(line).append(System.lineSeparator());
            }
            writer.flush();
            return writer.toString();
        }
    } catch (Exception e) {
        throw new IllegalStateException("unable to load template " + templateName, e);
    }
}
 

private void assertCompiles(Collection<AvroGeneratedSourceCode> generatedCode) throws Exception {

    //write out generated code into a source tree
    Path tempRootFolder = Files.createTempDirectory(null);
    File[] fileArray = new File[generatedCode.size()];
    int i=0;
    for (AvroGeneratedSourceCode avroGeneratedSourceCode : generatedCode) {
      fileArray[i++] = avroGeneratedSourceCode.writeToDestination(tempRootFolder.toFile());
    }

    //spin up a java compiler task, use current runtime classpath, point at source tree created above
    List<String> optionList = new ArrayList<>();
    optionList.addAll(Arrays.asList("-classpath", System.getProperty("java.class.path")));
    JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
    StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, null);
    Iterable<? extends JavaFileObject> javaFileObjects = fileManager.getJavaFileObjects(fileArray);
    StringWriter compilerOutput = new StringWriter();
    JavaCompiler.CompilationTask task = compiler.getTask(compilerOutput, fileManager, null, optionList, null, javaFileObjects);
    compilerOutput.flush();

    //compile, assert no errors
    Assert.assertTrue(task.call(), "compilation failed with " + compilerOutput.toString());
  }
 

private void runTest(String code, String expectedDesugar) throws Exception {
    List<JavaFileObject> files = List.nil();

    for (String file : code.split("---")) {
        files = files.prepend(new ToolBox.JavaSource(file));
    }

    Path classes = Paths.get("classes");

    if (Files.exists(classes)) {
        tb.cleanDirectory(classes);
    } else {
        Files.createDirectories(classes);
    }

    JavacTool compiler = (JavacTool) ToolProvider.getSystemJavaCompiler();
    StringWriter out = new StringWriter();
    Context context = new Context();
    TestLower.preRegister(context);
    Iterable<String> options = Arrays.asList("-d", classes.toString());
    JavacTask task = (JavacTask) compiler.getTask(out, null, null, options, null, files, context);

    task.generate();

    out.flush();

    String actual = out.toString().replace(System.getProperty("line.separator"), "\n");

    if (!expectedDesugar.equals(actual)) {
        throw new IllegalStateException("Actual does not match expected: " + actual);
    }
}
 

/** This method prepares the crash report. */
private static String prepareCrashReport(Thread thread, Throwable ex, String email, String problem) {
    StringWriter sw = new StringWriter();
    PrintWriter pw = new PrintWriter(sw);
    pw.printf("Alloy Analyzer %s crash report (Build Date = %s) (Commit = %s)\n", Version.version(), Version.commit);
    pw.printf("\n========================= Email ============================\n%s\n", Util.convertLineBreak(email).trim());
    pw.printf("\n========================= Problem ==========================\n%s\n", Util.convertLineBreak(problem).trim());
    pw.printf("\n========================= Thread Name ======================\n%s\n", thread.getName().trim());
    if (ex != null)
        pw.printf("\n========================= Stack Trace ======================\n%s\n", dump(ex));
    pw.printf("\n========================= Preferences ======================\n");
    try {
        for (String key : Preferences.userNodeForPackage(Util.class).keys()) {
            String value = Preferences.userNodeForPackage(Util.class).get(key, "");
            pw.printf("%s = %s\n", key.trim(), value.trim());
        }
    } catch (BackingStoreException bse) {
        pw.printf("BackingStoreException occurred: %s\n", bse.toString().trim());
    }
    pw.printf("\n========================= System Properties ================\n");
    pw.println("Runtime.freeMemory() = " + Runtime.getRuntime().freeMemory());
    pw.println("nRuntime.totalMemory() = " + Runtime.getRuntime().totalMemory());
    for (Map.Entry<Object,Object> e : System.getProperties().entrySet()) {
        String k = String.valueOf(e.getKey()), v = String.valueOf(e.getValue());
        pw.printf("%s = %s\n", k.trim(), v.trim());
    }
    pw.printf("\n========================= The End ==========================\n\n");
    pw.close();
    sw.flush();
    return sw.toString();
}
 

private static void validate(A4Solution sol) throws Exception {
    StringWriter sw = new StringWriter();
    PrintWriter pw = new PrintWriter(sw);
    sol.writeXML(pw, null, null);
    pw.flush();
    sw.flush();
    String txt = sw.toString();
    A4SolutionReader.read(new ArrayList<Sig>(), new XMLNode(new StringReader(txt))).toString();
    StaticInstanceReader.parseInstance(new StringReader(txt));
}
 

public String getLastExceptionAsString()
{
    String result = null;

	readLock.lock();
    try
    {
     if (lastException != null)
     {
         StringWriter sw = new StringWriter();
         PrintWriter  pw = new PrintWriter(sw, true);
         
         lastException.printStackTrace(pw);
         
         pw.flush();
         sw.flush();
         
         result = sw.toString();
     }
     
     return(result);
	}
	finally
	{
		readLock.unlock();
	}
}
 

@Override
public String toString() {
  StringWriter sw = new StringWriter();
  printHelp(new HelpFormatter(), new PrintWriter(sw));
  sw.flush();
  return sw.getBuffer().toString();
}
 

public static String writerGeneratorConfig(String url, String username, String password, String driverClass,
		String packagePath, String targetPath, List<String> tables) throws IOException, SQLException {
	VelocityContext ctx = new VelocityContext();
	Template template = getTempate("templates/generatorConfig.vm");
	ctx.put("url", url);
	ctx.put("username", username);
	ctx.put("password", password);
	ctx.put("driverClass", driverClass);
	ctx.put("tables", tables);

	Map<String, String> primaryKeys = new HashMap<>();

	Connection connection = DriverManager.getConnection(url, username, password);
	for (String tableName : tables) {
		String primaryKey = TblUtil.getPrimaryKey(connection, tableName);
		String key = toHump(primaryKey);
		primaryKeys.put(tableName, key);
	}
	ctx.put("primaryKeys", primaryKeys);
	List<String> models = new ArrayList<String>();
	for (String table : tables) {
		String modelName = tableNameConvertModelName(table);
		models.add(modelName);
	}
	ctx.put("models", models);
	ctx.put("packagePath", packagePath);
	ctx.put("targetPath", targetPath);
	StringWriter writer = new StringWriter();
	template.merge(ctx, writer);
	writer.flush();
	writer.close();
	return writer.toString();
}
 

public static final String exception2String(Throwable e) {

        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw, true);
        e.printStackTrace(pw);
        pw.flush();
        sw.flush();
        return sw.toString();
    }
 

protected void handleLog(final JoinPoint joinPoint, final Exception e) {
    try {
        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
        OperateLog operateLog = this.getAnnotationLog(joinPoint);
        if (operateLog == null) {
            return;
        }
        RequestTokenBO requestToken = SmartRequestTokenUtil.getRequestUser();
        if (requestToken == null) {
            return;
        }
        // 设置方法名称
        String className = joinPoint.getTarget().getClass().getName();
        String methodName = joinPoint.getSignature().getName();
        String operateMethod = className + "." + methodName;
        Object[] args = joinPoint.getArgs();
        StringBuilder sb = new StringBuilder();
        for (Object obj : args) {
            sb.append(obj.getClass().getSimpleName());
            sb.append("[");
            sb.append(JSON.toJSONString(obj));
            sb.append("]");
        }
        String params = sb.toString();
        String failReason = null;
        Integer result = JudgeEnum.YES.getValue();
        if (e != null) {
            result = JudgeEnum.NO.getValue();
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter(sw, true);
            e.printStackTrace(pw);
            failReason = sw.toString();
            pw.flush();
            pw.close();
            sw.flush();
            sw.close();
        }
        UserOperateLogEntity operateLogEntity =
            UserOperateLogEntity.builder().userId(requestToken.getRequestUserId()).userName(requestToken.getEmployeeBO().getActualName()).url(request.getRequestURI()).method(operateMethod).param(params).failReason(failReason).result(result).build();
        ApiOperation apiOperation = this.getApiOperation(joinPoint);
        if (apiOperation != null) {
            operateLogEntity.setContent(apiOperation.value());
        }
        Api api = this.getApi(joinPoint);
        if (api != null) {
            String[] tags = api.tags();
            operateLogEntity.setModule(SmartStringUtil.join(tags, ","));
        }
        logService.addLog(operateLogEntity);
    } catch (Exception exp) {
        log.error("保存操作日志异常:{}", exp.getMessage());
        exp.printStackTrace();
    }
}
 

@Override
protected void executeInternal(JobExecutionContext context) throws JobExecutionException {
    JobDetail jobDetail = context.getJobDetail();
    Object params = jobDetail.getJobDataMap().get(QuartzConst.QUARTZ_PARAMS_KEY);
    JobKey jobKey = jobDetail.getKey();

    Long taskId = SmartQuartzUtil.getTaskIdByJobKey(jobKey);
    QuartzTaskService quartzTaskService = (QuartzTaskService) SmartApplicationContext.getBean("quartzTaskService");
    QuartzTaskEntity quartzTaskEntity = quartzTaskService.getByTaskId(taskId);

    QuartzTaskLogService quartzTaskLogService = (QuartzTaskLogService) SmartApplicationContext.getBean("quartzTaskLogService");

    QuartzTaskLogEntity taskLogEntity = new QuartzTaskLogEntity();
    taskLogEntity.setTaskId(taskId);
    taskLogEntity.setIpAddress(SmartIPUtil.getLocalHostIP());
    taskLogEntity.setTaskName(quartzTaskEntity.getTaskName());
    String paramsStr = null;
    if (params != null) {
        paramsStr = params.toString();
        taskLogEntity.setTaskParams(paramsStr);
    }
    taskLogEntity.setUpdateTime(new Date());
    taskLogEntity.setCreateTime(new Date());
    //任务开始时间
    long startTime = System.currentTimeMillis();
    try {
        ITask taskClass = (ITask) SmartApplicationContext.getBean(quartzTaskEntity.getTaskBean());
        taskClass.execute(paramsStr);
        taskLogEntity.setProcessStatus(TaskResultEnum.SUCCESS.getStatus());
    } catch (Exception e) {
        log.error("", e);
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw, true);
        e.printStackTrace(pw);
        pw.flush();
        sw.flush();
        taskLogEntity.setProcessStatus(TaskResultEnum.FAIL.getStatus());
        taskLogEntity.setProcessLog(sw.toString());
    } finally {
        long times = System.currentTimeMillis() - startTime;
        taskLogEntity.setProcessDuration(times);
        quartzTaskLogService.save(taskLogEntity);
    }

}
 

@Override
public void traverseMethodDeclarator(MethodDeclarator methodDeclarator) {
  if (captureMethods) {
    // Generates a "labeled statement".
    // This code takes code from the method body, wraps it into the labeled statement
    // and replaces all the return statements by break command with label.
    //
    // For example, the following method
    //    public void foo(int a) {
    //      if (a < 0) {
    //        return;
    //      } else {
    //        do something;
    //      }
    //    }
    //
    // will be converted to
    //    MethodClassName_foo: {
    //      if (a < 0) {
    //        break MethodClassName_foo;
    //      } else {
    //        do something;
    //      }
    //    }

    // Constructs a name of the resulting label
    // using methods class name and method name itself.
    String[] fQCN = methodDeclarator.getDeclaringType().getClassName().split("\\.");
    String returnLabel = fQCN[fQCN.length - 1] + "_" + methodDeclarator.name;
    Java.Block methodBodyBlock = new Java.Block(methodDeclarator.getLocation());

    // DeepCopier implementation which returns break statement with label
    // instead if return statement.
    DeepCopier returnStatementReplacer = new DeepCopier() {
      @Override
      public Java.BlockStatement copyReturnStatement(Java.ReturnStatement subject) {
        return new Java.BreakStatement(subject.getLocation(), returnLabel);
      }
    };
    try {
      // replaces return statements and stores the result into methodBodyBlock
      methodBodyBlock.addStatements(
          returnStatementReplacer.copyBlockStatements(methodDeclarator.optionalStatements));
    } catch (CompileException e) {
      throw new RuntimeException(e);
    }

    // wraps method code with replaced return statements into label statement.
    Java.LabeledStatement labeledStatement =
        new Java.LabeledStatement(methodDeclarator.getLocation(), returnLabel, methodBodyBlock);

    // Unparse the labeled statement.
    StringWriter writer = new StringWriter();
    Unparser unparser = new Unparser(writer);
    // unparses labeledStatement and stores unparsed code into writer
    unparser.unparseBlockStatement(labeledStatement);
    unparser.close();
    writer.flush();
    methods.put(methodDeclarator.name, writer.getBuffer().toString());
  }
}