這款反編譯器叫 “Java Decompiler”, 由 Pavel Kouznetsov開發，目前最新版本為0.2.5. 它由 C++開發，并且官方可以下載 windows、linux和蘋果Mac Os三個平臺的可執行程序。
官方網站：http://jd.benow.ca/
JD-GUI 是一個用 C++ 開發的 Java 反編譯工具，由 Pavel Kouznetsov開發，支持Windows、Linux和蘋果Mac Os三個平臺。而且提供了Eclipse平臺下的插件JD-Eclipse。JD-GUI不需要安裝，直接點擊運行，可以反編譯jar,class文件。
官方網站：http://jd.benow.ca/
public boolean PReHandle(HttpServletRequest req, HttpServletResponse res, Object h) throws Exception { String servletPath = req.getServletPath().toLowerCase(); boolean isContains = (servletPath.contains("add")) || (servletPath.contains("create")); boolean pass; if (isContains) { String name = this.userService.getStaffNameByStaffId((Long)req.getAttribute("sid")); boolean pass; if (StringUtils.isNotBlank(name)) { pass = true; } else { boolean pass = false; JSON.writeDataToStream(res.getOutputStream(), I18NResult.failure(ErrorType.USERNAM_NONE)); } } else { pass = true; } return pass; }}pass 多處創建 調整后如下 public boolean preHandle(HttpServletRequest req, HttpServletResponse res, Object h)/* */ throws Exception/* */ {/* 24 */ String servletPath = req.getServletPath().toLowerCase();/* 25 */ boolean isContains = (servletPath.contains("add")) || (servletPath.contains("create"));/* */ boolean pass;/* 26 */ if (isContains) {/* 27 */ String name = this.userService.getStaffNameByStaffId((Long)req.getAttribute("sid"));/* 28 */ if (StringUtils.isNotBlank(name)) {/* 29 */ pass = true;/* */ } else {/* 31 */ pass = false;/* 32 */ JSON.writeDataToStream(res.getOutputStream(), I18NResult.failure(ErrorType.USERNAM_NONE));/* */ }/* */ } else {/* 35 */ pass = true;/* */ }/* */ /* 38 */ return pass;/* */ }/* */ }有時候JD-GUI編譯出來的代碼莫名其妙，這個時候可以結合
Java Decompiler 編譯后的代碼綜合分析
下面給出一個class 文件的一個函數由 jd-gui編譯的函數 （有問題）@RequestMapping({"/getMyProjectTaskList", "/getMeProjectTasks"})/* */ @ResponseBody/* */ public Output getMetasks(@RequestParam("projectId") Long projectId, @Sid Long sid) {/* */ try {/* 141 */ metasks = this.taskService.getMetasks(projectId, sid);/* */ }/* */ catch (Exception e)/* */ {/* */ List metasks;/* 143 */ throw new RuntimeException(e);/* */ }/* 147 */ List metasks;/* 146 */ List metaskRess = new ArrayList(metasks.size());/* 147 */ for (Iterator localIterator = metasks.iterator(); localIterator.hasNext(); ) { metask = (MetaskBo)localIterator.next();/* 148 */ MetaskRes metaskVo = new MetaskRes();/* */ /* 150 */ metaskVo.setTaskId(ObjectUtils.toString(metask.getTaskId()));/* 151 */ metaskVo.setIsLeafTask(ObjectUtils.toString(metask.getIsLeafTask()));/* 152 */ metaskVo.setTaskName(ObjectUtils.toString(metask.getTaskName()));/* 153 */ srt = metask.getStartDateTime();/* 154 */ Date end = metask.getEndDateTime();/* 155 */ metaskVo.setSrtDate(DateUtil.defaultDateToString(srt));/* 156 */ metaskVo.setEndDate(DateUtil.defaultDateToString(end));/* 157 */ metaskVo.setIsFinished(ObjectUtils.toString(metask.getIsFinished()));/* 158 */ metaskVo.setBetween((srt.getTime() <= metask.getCurrentDateTime().longValue()) && (metask.getCurrentDateTime().longValue() <= end.getTime()) ? "1" : "0");/* 159 */ metaskVo.setTaskDesStatus(ObjectUtils.toString(metask.getTaskDesStatus()));/* 160 */ metaskVo.setTaskStatus(ObjectUtils.toString(metask.getTaskStatus()));/* 161 */ metaskVo.setRemindTime(ObjectUtils.toString(metask.getRemindTime()));/* 162 */ metaskVo.setWatcherSid(ObjectUtils.toString(metask.getWatcherSid()));/* 163 */ metaskVo.setAuditorSid(ObjectUtils.toString(metask.getAuditorSid()));/* */ /* 165 */ metaskRess.add(metaskVo);/* */ }/* 169 */ Date srt;/* 168 */ List taskInfos = this.taskProgressService.calcTaskProgress(projectId);/* 169 */ for (MetaskBo metask = taskInfos.iterator(); metask.hasNext(); ) { taskInfo = (TaskInfo)metask.next();/* 170 */ for (MetaskRes metaskRes : metaskRess)/* 171 */ if (taskInfo.getTaskId().toString().equals(metaskRes.getTaskId())) {/* 172 */ metaskRes.setPlanProgress(ObjectUtils.toString(Float.valueOf(taskInfo.getPlanProgress())));/* 173 */ float undoneProgress = taskInfo.getPlanProgress() - taskInfo.getProgress();/* 174 */ metaskRes.setUndoneProgress(ObjectUtils.toString(Float.valueOf(undoneProgress < 0.0F ? 0.0F : undoneProgress)));/* 175 */ metaskRes.setActualProgress(ObjectUtils.toString(Float.valueOf(taskInfo.getProgress())));/* 176 */ break;/* */ }/* */ }/* */ TaskInfo taskInfo;/* 181 */ return Result.success(metaskRess);/* */ }由dj java Decompiler工具分析出來的結果(也有問題) @RequestMapping(value={"/getMyProjectTaskList", "/getMeProjectTasks"}) @ResponseBody public Output getMetasks(@RequestParam(value="projectId") Long projectId, @Sid Long sid) { List metasks; try { metasks = taskService.getMetasks(projectId, sid); } catch(Exception e) { throw new RuntimeException(e); } List metaskRess = new ArrayList(metasks.size()); MetaskRes metaskVo; for(Iterator iterator = metasks.iterator(); iterator.hasNext(); metaskRess.add(metaskVo)) { MetaskBo metask = (MetaskBo)iterator.next(); metaskVo = new MetaskRes(); metaskVo.setTaskId(ObjectUtils.toString(metask.getTaskId())); metaskVo.setIsLeafTask(ObjectUtils.toString(metask.getIsLeafTask())); metaskVo.setTaskName(ObjectUtils.toString(metask.getTaskName())); Date srt = metask.getStartDateTime(); Date end = metask.getEndDateTime(); metaskVo.setSrtDate(DateUtil.defaultDateToString(srt)); metaskVo.setEndDate(DateUtil.defaultDateToString(end)); metaskVo.setIsFinished(ObjectUtils.toString(metask.getIsFinished())); metaskVo.setBetween(srt.getTime() > metask.getCurrentDateTime().longValue() || metask.getCurrentDateTime().longValue() > end.getTime() ? "0" : "1"); metaskVo.setTaskDesStatus(ObjectUtils.toString(metask.getTaskDesStatus())); metaskVo.setTaskStatus(ObjectUtils.toString(metask.getTaskStatus())); metaskVo.setRemindTime(ObjectUtils.toString(metask.getRemindTime())); metaskVo.setWatcherSid(ObjectUtils.toString(metask.getWatcherSid())); metaskVo.setAuditorSid(ObjectUtils.toString(metask.getAuditorSid())); } List taskInfos = taskProgressService.calcTaskProgress(projectId); Iterator iterator1 = taskInfos.iterator();label0: do { if(!iterator1.hasNext()) break; TaskInfo taskInfo = (TaskInfo)iterator1.next(); Iterator iterator2 = metaskRess.iterator(); MetaskRes metaskRes; do { if(!iterator2.hasNext()) continue label0; metaskRes = (MetaskRes)iterator2.next(); } while(!taskInfo.getTaskId().toString().equals(metaskRes.getTaskId())); metaskRes.setPlanProgress(ObjectUtils.toString(Float.valueOf(taskInfo.getPlanProgress()))); float undoneProgress = taskInfo.getPlanProgress() - taskInfo.getProgress(); metaskRes.setUndoneProgress(ObjectUtils.toString(Float.valueOf(undoneProgress >= 0.0F ? undoneProgress : 0.0F))); metaskRes.setActualProgress(ObjectUtils.toString(Float.valueOf(taskInfo.getProgress()))); } while(true); return Result.success(metaskRess); }結合二者的優點 回避各自缺點最終分析出來的結果/* */ @RequestMapping({"/getMyProjectTaskList", "/getMeProjectTasks"})/* */ @ResponseBody/* */ public Output getMetasks(@RequestParam("projectId") Long projectId, @Sid Long sid) { List<MetaskBo> metasks;/* */ try {/* 141 */ metasks = this.taskService.getMetasks(projectId, sid);/* */ }/* */ catch (Exception e)/* */ {/* 143 */ throw new RuntimeException(e);/* */ }/* 147 */ /* 146 */ List<MetaskRes> metaskRess = new ArrayList<MetaskRes>(metasks.size());/* 147 */ for (Iterator localIterator = metasks.iterator(); localIterator.hasNext(); ) { MetaskBo metask = (MetaskBo)localIterator.next();/* 148 */ MetaskRes metaskVo = new MetaskRes();/* */ /* 150 */ metaskVo.setTaskId(ObjectUtils.toString(metask.getTaskId()));/* 151 */ metaskVo.setIsLeafTask(ObjectUtils.toString(metask.getIsLeafTask()));/* 152 */ metaskVo.setTaskName(ObjectUtils.toString(metask.getTaskName()));/* 153 */ Date srt = metask.getStartDateTime();/* 154 */ Date end = metask.getEndDateTime();/* 155 */ metaskVo.setSrtDate(DateUtil.defaultDateToString(srt));/* 156 */ metaskVo.setEndDate(DateUtil.defaultDateToString(end));/* 157 */ metaskVo.setIsFinished(ObjectUtils.toString(metask.getIsFinished()));/* 158 */ metaskVo.setBetween((srt.getTime() <= metask.getCurrentDateTime().longValue()) && (metask.getCurrentDateTime().longValue() <= end.getTime()) ? "1" : "0");/* 159 */ metaskVo.setTaskDesStatus(ObjectUtils.toString(metask.getTaskDesStatus()));/* 160 */ metaskVo.setTaskStatus(ObjectUtils.toString(metask.getTaskStatus()));/* 161 */ metaskVo.setRemindTime(ObjectUtils.toString(metask.getRemindTime()));/* 162 */ metaskVo.setWatcherSid(ObjectUtils.toString(metask.getWatcherSid()));/* 163 */ metaskVo.setAuditorSid(ObjectUtils.toString(metask.getAuditorSid()));/* */ /* 165 */ metaskRess.add(metaskVo);/* */ }/* 168 */ List<TaskInfo> taskInfos = this.taskProgressService.calcTaskProgress(projectId);/* 169 */ for (Iterator iterator1= taskInfos.iterator(); iterator1.hasNext(); ) { TaskInfo taskInfo = (TaskInfo)iterator1.next();/* 170 */ for (MetaskRes metaskRes : metaskRess)/* 171 */ if (taskInfo.getTaskId().toString().equals(metaskRes.getTaskId())) {/* 172 */ metaskRes.setPlanProgress(ObjectUtils.toString(Float.valueOf(taskInfo.getPlanProgress())));/* 173 */ float undoneProgress = taskInfo.getPlanProgress() - taskInfo.getProgress();/* 174 */ metaskRes.setUndoneProgress(ObjectUtils.toString(Float.valueOf(undoneProgress < 0.0F ? 0.0F : undoneProgress)));/* 175 */ metaskRes.setActualProgress(ObjectUtils.toString(Float.valueOf(taskInfo.getProgress())));/* 176 */ break;/* */ }/* */ }/* 181 */ return Result.success(metaskRess);/* */ }
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