1 package CN. itcast. request; 2 3 Import Java. io. ioexception; 4 Import Java. io. inputstream; 5 import Java. io. printwriter; 6 Import Java. lang. reflect. invocationtargetexception; 7 Import Java. util. enumeration; 8 Import Java. util. map; 9 10 Import javax. servlet. servletexception; 11 import javax. servlet. HTTP. httpservlet; 12 Import javax. servlet. HTTP. httpservletrequest; 13 Import javax. servlet. HTTP. httpservl Etresponse; 14 15 Import Org. apache. commons. beanutils. beanutils; 16 17 import CN. itcast. user; 18 19 // GET request headers and request data 20 // obtain request data (check the request data before using it) 21 public class requestdemo extends httpservlet {22 23 public void doget (httpservletrequest request, httpservletresponse response) 24 throws servletexception, ioexception {25 26 system. out. println ("-------------- obtain method 1 ----------------"); 27 string value = reques T. getparameter ("username"); 28 If (value! = NULL &&! Value. trim (). equals ("") {29 system. out. println (value); 30} 31 32 system. out. println ("-------------- obtain method 2 ----------------"); 33 enumeration E = request. getparameternames (); 34 while (E. hasmoreelements () {35 string name = (string) E. nextelement (); 36 value = request. getparameter (name); 37 system. out. println (name + "=" + value); 38} 39 40 system. out. println ("-------------- obtain method 3 ----------------"); 41 string [] Values = request. getparametervalues ("username"); 42 for (INT I = 0; values! = NULL & I <values. length; I ++) {43 system. out. println (values); 44} 45 46 system. out. println ("-------------- obtain Method 4 ----------------"); 47 map = request. getparametermap (); 48 user = new user (); 49 50 try {51 beanutils. populate (user, MAP); 52} catch (exception E1) {53 e1.printstacktrace (); 54} 55 system. out. println (MAP); 56 57} 58 59 // method for getting the header 60 private void test1 (httpservletrequest request) throws ioexception {61 string headvalue = request. getheader ("Accept-encoding"); 62 system. out. println (headvalue); 63 system. out. println ("-------------------------------"); 64 65 enumeration E = request. getheaders ("Accept-encoding"); 66 while (E. hasmoreelements () {67 string value = (string) E. nextelement (); 68 system. out. println (value); 69} 70 71 system. out. println ("-------------------------------"); 72 E = request. getheadernames (); 73 while (E. hasmoreelements () {74 string name = (string) E. nextelement (); 75 string value = request. getheader (name); 76 system. out. println (name + "=" + value); 77 78} 79 80 system. out. println ("-------------- obtain Method 5 ----------------"); 81 82 inputstream in = request. getinputstream (); 83 int Len = 0; 84 byte buffer [] = new byte [1024]; 85 while (LEN = in. read (buffer)> 0) {86 system. out. println (LEN); 87 system. out. println (new string (buffer, 0, Len); 88} 89} 90 91 Public void dopost (httpservletrequest request, httpservletresponse response) 92 throws servletexception, ioexception {93 94} 95 96}View code
1 package cn.itcast; 2 3 public class User { 4 private String username[]; 5 private String password; 6 7 public String[] getUsername() { 8 return username; 9 }10 11 public void setUsername(String[] username) {12 this.username = username;13 }14 15 public String getPassword() {16 return password;17 }18 19 public void setPassword(String password) {20 this.password = password;21 }22 23 }View code
1 <! Doctype HTML public "-// W3C // dtd html 4.01 transitional // en"> 2 <HTML> 3 View code
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