一位态度非常认真的学生写的代码

1. package com.qimenguigu.l07131;
3. import java.io.BufferedReader;
4. import java.io.IOException;
5. import java.io.InputStreamReader;
7. /**
8. * 输入年，月，日，next|prior，如果是一个正确的日期，算出上一天或下一天
9. *
10. * @author Longjie
11. * @website www.qimenguigu.com
12. */
13. public class Title15 {
14. public static void main(String[] args) throws IOException {
15. BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
16. System.out.println("请输入年份");
17. String s1 = br.readLine();
18. System.out.println("请输入月份");
19. String s2 = br.readLine();
20. System.out.println("请输入日份");
21. String s3 = br.readLine();
22. int year = Integer.parseInt(s1);
23. int month = Integer.parseInt(s2);
24. int day = Integer.parseInt(s3);
26. if (year >= 0 && month >= 1 && month if (month == 1 || month == 3 || month == 5 || month == 7
27. || month == 8 || month == 10 || month == 12) {
28. if (day >= 1 && day System.out.println("您输入的日期为:" + year + "年" + month + "月"
29. + day + "日");
30. if (day == 31) {
31. if (month == 12)
32. System.out.println("且上一天为：" + year + "年12月"
33. + (day - 1) + "日" + "," + "下一天为："
34. + (year + 1) + "年1月1日");
35. else
36. System.out.println("且上一天为：" + year + "年" + month
37. + "月" + (day - 1) + "日" + "," + "下一天为："
38. + year + "年" + (month + 1) + "月1日");
39. } else if (day == 1) {
40. if (month == 1)
41. System.out.println("且上一天为：" + (year - 1)
42. + "年12月31日" + "," + "下一天为：" + year + "年"
43. + month + "月" + (day + 1) + "日");
44. else if (month == 3) {
45. if ((year % 4 == 0 && year % 100 != 0)
46. || (year % 400 == 0))
47. System.out.println("且上一天为：" + year + "年2月29日"
48. + "," + "下一天为：" + year + "年" + month
49. + "月" + (day + 1) + "日");
50. else
51. System.out.println("且上一天为：" + year + "年2月28日"
52. + "," + "下一天为：" + year + "年" + month
53. + "月" + (day + 1) + "日");
54. } else
55. System.out.println("且上一天为：" + year + "年"
56. + (month - 1) + "月30日" + "," + "下一天为："
57. + year + "年" + month + "月" + (day + 1)
58. + "日");
59. } else
60. System.out.println("且上一天为：" + year + "年" + month + "月"
61. + (day - 1) + "日" + "," + "下一天为：" + year + "年"
62. + month + "月" + (day + 1) + "日");
63. } else
64. System.out.println("您输入的日期不合法");
65. } else if (month == 4 || month == 6 || month == 9 || month == 11) {
66. if (day >= 1 && day System.out.println("您输入的日期为:" + year + "年" + month + "月"
67. + day + "日");
68. if (day == 30)
69. System.out.println("且上一天为：" + year + "年" + month + "月"
70. + (day - 1) + "日" + "," + "下一天为：" + year + "年"
71. + (month + 1) + "月1日");
72. else if (day == 1)
73. System.out.println("且上一天为：" + year + "年" + (month - 1)
74. + "月31日" + "," + "下一天为：" + year + "年" + month
75. + (day + 1) + "日");
76. else
77. System.out.println("且上一天为：" + year + "年" + month + "月"
78. + (day - 1) + "日" + "," + "下一天为：" + year + "年"
79. + month + (day + 1) + "日");
80. } else
81. System.out.println("您输入的日期不合法");
82. } else if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {
83. if (day == 29)
84. System.out.println("您输入的日期为:" + year + "年" + month + "月"
85. + day + "日" + "\n" + "且上一天为：" + year + "年2月28日"
86. + "," + "下一天为：" + year + "年3月1日");
87. else {
88. if (day == 28)
89. System.out.println("您输入的日期为:" + year + "年" + month
90. + "月" + day + "日" + "\n" + "且上一天为：" + year
91. + "年2月27日" + "," + "下一天为：" + year + "年2月29日");
92. else
93. System.out.println("您输入的日期不合法");
94. }
95. }
96. } else
97. System.out.println("您输入的日期不合法");
98. }
99. }

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