一个java时间辅助工具类

 TimeMeasure是我以前写的一个java 辅助类，开发人员可以用它们在控制台打印任意两个步骤之间的时间消耗。中途可以pause这个时间计数方法，然后再resume回来，pause的时间是不计入到实际方法消耗的时间的。使用方法见TimeMeasure的main方法,另外如果你愿意，可以拓展它用log4j或者其他方式输出到文件。

 

TimeMeasure.java

 

Java代码

1. public class TimeMeasure {
2.  
3. // PTODO create junit test class
4. private static HashMap<String, TimeStack> timers;
5.  
6. private static int indent = 0;
7.  
8. /**
9. * measureActive is true by default. A true value means that all methods calls are processed else no one.
10. */
11. public static boolean measureActive = true;
12.  
13. /**
14. * display is true by default. A true value means that all informations are displayed.
15. */
16. public static boolean display = true;
17.  
18. public static boolean displaySteps = true;
19.  
20.  
21.  
22. /**
23. *
24. * DOC hywang Comment method "start".
25. *
26. * @param idTimer
27. */
28. public static void begin(String idTimer) {
29. if (!measureActive) {
30. return;
31. }
32. init();
33. if (timers.containsKey(idTimer)) {
34. if (display) {
35. System.out.println(indent(indent) + "Warning (start): timer " + idTimer + " already exists"); //$NON-NLS-1$ //$NON-NLS-2$
36. }
37. } else {
38. indent++;
39. TimeStack times = new TimeStack();
40. timers.put(idTimer, times);
41. if (display) {
42. System.out.println(indent(indent) + "Start '" + idTimer + "' ..."); //$NON-NLS-1$ //$NON-NLS-2$
43. }
44. }
45. }
46.  
47. /**
48. *
49. * DOC hywang Comment method "end".
50. *
51. * @param idTimer
52. * @return total elapsed time since start in ms
53. */
54. public static long end(String idTimer) {
55. if (!measureActive) {
56. return 0;
57. }
58. init();
59. if (!timers.containsKey(idTimer)) {
60. if (display) {
61. System.out.println(indent(indent) + "Warning (end): timer " + idTimer + " doesn't exist"); //$NON-NLS-1$ //$NON-NLS-2$
62. }
63. return -1;
64. } else {
65. TimeStack timeStack = timers.get(idTimer);
66. timers.remove(idTimer);
67. long elapsedTimeSinceLastRequest = timeStack.getLastStepElapsedTime();
68. if (display && displaySteps) {
69. System.out.println(indent(indent) + "End '" + idTimer + "', elapsed time since last request: " //$NON-NLS-1$ //$NON-NLS-2$
70. + elapsedTimeSinceLastRequest + " ms "); //$NON-NLS-1$
71. }
72. long totalElapsedTime = timeStack.getTotalElapsedTime();
73. if (display) {
74. System.out.println(indent(indent) + "End '" + idTimer + "', total elapsed time: " + totalElapsedTime + " ms "); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
75. }
76. indent--;
77. return totalElapsedTime;
78. }
79. }
80.  
81. /**
82. *
83. * DOC hywang Comment method "timeSinceBegin".
84. *
85. * @param idTimer
86. * @return total elapsed time since start in ms
87. */
88. public static long timeSinceBegin(String idTimer) {
89. if (!measureActive) {
90. return 0;
91. }
92. init();
93. if (!timers.containsKey(idTimer)) {
94. if (display) {
95. System.out.println(indent(indent) + "Warning (end): timer " + idTimer + " does'nt exist"); //$NON-NLS-1$ //$NON-NLS-2$
96. }
97. return -1;
98. } else {
99. long time = timers.get(idTimer).getTotalElapsedTime();
100. if (display) {
101. System.out.println(indent(indent) + "-> '" + idTimer + "', elapsed time since start: " + time + " ms "); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
102. }
103. return time;
104. }
105. }