Java captures webpage content and obtains the specified server IP Address

Code:

1. Package ttwork.net;
2. Import java.net .*;
3. Import java. util. RegEx .*;
4. Import java. Io .*;
5. Public class webpage {
6. Public static void main (string [] ARGs ){
7. // Http://zhidao.baidu.com/question/192012139.html
8. Webpage Wp = new webpage ("http://tieba.baidu.com/F? KZ = 664340519 ");
9. // WP. getsubhtml (1, 20, "src/f2.html ");
10. WP. getinnerhtml ("/^ ([// w-//.] +) @ (// [[0-9] {1, 3 }//. [0-9] {1, 3 }//. [0-9] {1, 3 }//.) | ([// w-] + //.) +) ([A-Za-Z] {2, 4} | [0-9] {1, 3}) (//]?) $/G "," src/f2.html ");
11. }
12. Private URL; // URL
13. Private inetaddress [] IP address; // ip address
14. Private file desfile; // target file
15. Private inputstreamreader ISR; // Reader
16. Private outputstreamwriter OSW; // writer
17. Private bufferedreader BR; // Reader
18. Private bufferedwriter bw; // writer
19. /**
20. * @ Param protocol name
21. * @ Param host name or domain name
22. */
23. Public webpage (string _ URL ){
24. Try {
25. Url = new URL (_ URL );
26. Try {
27. IP = inetaddress. getallbyname (_ URL. substring (7 ));
28. } Catch (unknownhostexception e ){
29. IP = NULL;
30. }
31. } Catch (malformedurlexception e ){
32. E. printstacktrace ();
33. }
34. }
35. /**
36. * Obtain the IP address of a specified website. Some websites have more than one IP address.
37. * @ Return the IP address of the string connection
38. */
39. Public String getallip (){
40. String ipall = NULL;
41. For (INT I = 0; I <IP. length; I ++ ){
42. Ipall + = IP [I]. tostring () + "/N ";
43. }
44. Return ipall;
45. }
46. /**
47. * Obtain all the content on the webpage.
48. */
49. Public void gethtml (string desfilepath ){
50. Try {
51. Desfile = new file (desfilepath );
52. ISR = new inputstreamreader (URL. openstream ());
53. OSW = new outputstreamwriter (New fileoutputstream (desfile ));
54. Char [] line = new char [1024];
55. While (ISR. Read (line)> 0 ){
56. OSW. Write (line );
57. OSW. Flush ();
58. }
59. } Catch (filenotfoundexception e ){
60. E. printstacktrace ();
61. } Catch (ioexception e ){
62. E. printstacktrace ();
63. } Finally {
64. Try {
65. OSW. Close ();
66. ISR. Close ();
67. } Catch (ioexception e ){
68. E. printstacktrace ();
69. }
70. }
71. }
72. /**
73. * Match by regular expression to obtain the content in the specified format, for example, to obtain all email addresses on the webpage
74. * Verify the regular expression of the email address.
75. */^ ([/W-/.] +) @ (/[0-9] {1, 3 }/. [0-9] {1, 3 }/. [0-9] {1, 3 }/.) | ([/W-] + /.) +) ([A-Za-Z] {2, 4} | [0-9] {1, 3}) (/]?) $/G
76. */
77. Public void getinnerhtml (string RegEx, string desfilepath ){
78. Try {
79. Desfile = new file (desfilepath );
80. ISR = new inputstreamreader (URL. openstream ());
81. BR = new bufferedreader (ISR );
82. OSW = new outputstreamwriter (New fileoutputstream (desfile ));
83. BW = new bufferedwriter (OSW );
84. Pattern P = pattern. Compile (RegEx );
85. Matcher m;
86. String line;
87. While (line = Br. Readline ())! = NULL ){
88. M = P. matcher (line );
89. If (M. Find ()){
90. Int S = M. Start ();
91. Int e = M. End ();
92. Bw. Write (line. substring (S, e ));
93. Bw. Flush ();
94. Bw. newline ();
95. }
96. }
97. } Catch (filenotfoundexception e ){
98. E. printstacktrace ();
99. } Catch (ioexception e ){
100. E. printstacktrace ();
101. } Finally {
102. Try {
103. Bw. Close ();
104. OSW. Close ();
105. BR. Close ();
106. ISR. Close ();
107. } Catch (ioexception e ){
108. E. printstacktrace ();
109. }
110. }
111. }
112. /**
113. * Get the content from the specified row on the webpage to the specified row. According to Java principles, the content includes the startrow line, not the endrow line.
114. *
115. */
116. Public void getsubhtml (INT startrow, int endrow, string desfilepath ){
117. Try {
118. Int rownum = 0;
119. Desfile = new file (desfilepath );
120. ISR = new inputstreamreader (URL. openstream ());
121. BR = new bufferedreader (ISR );
122. OSW = new outputstreamwriter (New fileoutputstream (desfile ));
123. BW = new bufferedwriter (OSW );
124. String line;
125. While (line = Br. Readline ())! = NULL ){
126. Rownum ++;
127. If (rownum <startrow ){
128. Continue;
129. } Else if (rownum> = startrow & rownum <endrow ){
130. Bw. Write (line );
131. Bw. Flush ();
132. Bw. newline ();
133. } Else {
134. Break;
135. }
136. }
137. } Catch (filenotfoundexception e ){
138. E. printstacktrace ();
139. } Catch (ioexception e ){
140. E. printstacktrace ();
141. } Finally {
142. Try {
143. Bw. Close ();
144. OSW. Close ();
145. BR. Close ();
146. ISR. Close ();
147. } Catch (ioexception e ){
148. E. printstacktrace ();
149. }
150. }
151. }
152. }