用Android搭建客户端手机和服务器交互开发实例

1、本文介绍了如何使用AndroidSSHJSONAD：笔者以前是学的Java EE，由于工程需要要开发Android，所以临时补了一个多星期，主要是手机端和效劳器端交互，双向开发的。首先在效劳器端，我承受的是SSHstruts2 集合了JSON的信息交互承受的JSON 来传输，由于在效劳器端用了Struts 2，所以我就用装了一个JSON插件。这样，很轻易的就把效劳器端的信息用JSON 的形式发送到了手机端。以下是代码：首先，在效劳器端搭建好SSH 框架，具体细节就不在陈述。struts.xml 配置如下：sult6.gin“result手机端的代码如下：可以达达节约手机和效劳器的交互，用单例实

2、现的：1. packagecom.jclick.cache;2.3. importcom.jclick.bean.User;4.5. publicclassCache6.7. privateUserUser;8.9. privateCache10.11. 12. /*构造单例*/privatestaticclassCacheHolderprivatestaticfinalCacheINSTANCE=newCache;15. publicCachegetInstancereturnCacheHolder.INSTANCE;18. publicUsergetUserreturnUser;21. p

3、ublicvoidsetUser(UserUser)this.User=User;24. 25.26. 27.28. packagecom.jclick.cache;29.30. importcom.jclick.bean.User;31.32. publicclassCache9./*构造单例*/privatestaticclassCacheHolderprivatestaticfinalCacheINSTANCE=newCache;42.publicCachegetInstancereturnCacheHolder.INSTANCE;45.public

4、UsergetUserreturnUser;48.publicvoidsetUser(UserUser)this.User=User;51.52.53. 接着开头书写手机端的协议1. tocol;2.importjava.io.BufferedReader;importjava.io.InputStreamReader;importjava.util.ArrayList;7.importorg.apache. . Response;importorg.apache. .NameValuePair;importorg.apache. .client. C

5、lient;importorg.apache. .client.entity.UrlEncodedFormEntity;importorg.apache. .client.methods. Post;importorg.apache. .impl.client.Default Client;importorg.apache. .message.BasicNameValuePair;importorg.json.JSONException;17.publicclassBaseProtocol20.private Client Client;private Post Request;24.25.p

6、rivateListnameValuePair=newArrayList();26.BaseProtocol Client=newDefault Client;29. 30.31. /*32. *向效劳器端发送恳求33. *paramurl*throwsException36. */protectedvoidpack(Stringurl)throwsException Client=newDefault Client;40. Request.setEntity(newUrlEncodedFormEntity(nameValuePair);response= Client.execute( Re

7、quest);43. 44.45. /*46. *得到返回数据47. *paramurl*return*throwsException51. */protectedvoidparsethrowsException55.BufferedReaderbufferedReader2=newBufferedReader(newInputStreamReader(response.getEntity.getContent);for(Strings=bufferedReader2.readLine;s!=null;s=bufferedReader2.readLine)sb.append(s);61. 62

8、. 63. 64.65. /*66. *向效劳器发送信息67. *paramkey*paramvalue70. */publicvoidaddNameValuePair(Stringkey,Stringvalue)nameValuePair.add(newBasicNameValuePair(key,value);73. 74.75. /*. 对象数据模型77. *return*throwsJSONException80. */publicJSONObjectgetJSONthrowsJSONExceptionreturnnewJSONObject(sb.toString);83. 84.85

9、. 86.87. tocol;88.importjava.io.BufferedReader;importjava.io.InputStreamReader;importjava.util.ArrayList;93.importorg.apache. . Response;importorg.apache. .NameValuePair;importorg.apache. .client. Client;importorg.apache. .client.entity.UrlEncodedFormEntity;importorg.apache. .cl

10、ient.methods. Post;importorg.apache. .impl.client.Default Client;importorg.apache. .message.BasicNameValuePair;importorg.json.JSONException;103.publicclassBaseProtocol106.private Client Client;private Post Request;110.111.ir;112.BaseProtocol Client=newDefault Client;115.116.117./*118.*向效劳器端发送恳求119.*

11、paramurl*throwsException122.*/protectedvoidpack(Stringurl)throwsException Client=newDefault Client;126. Request.setEntity(newUrlEncodedFormEntity(nameValuePair);response= Client.execute( Request);129.130.131./*132.*得到返回数据133.*paramurl*return*throwsException137.*/protectedvoidparsethrowsException141.

12、BufferedReaderbufferedReader2=newBufferedReader(tent);dReader2.readLine)sb.append(s);50.151./*152.*向效劳器发送信息153.*paramkey*paramvalue156.*/publicvoidaddNameValuePair(Stringkey,Stringvalue)nameValuePair.add(newBasicNameValuePair(key,value);159.160.161./*162.对象数据模型163.*return*throwsJSONExce

13、ption166.*/publicJSONObjectgetJSONthrowsJSONExceptionreturnnewJSONObject(sb.toString);169.170.接着是登陆协议，在这里我只是模拟登陆使用的一个类，仅供大家参考：1. tocol;2.3. importorg.json.JSONObject;4.5. importcom.jclick.bean.User;6.7. publicclassLoginProtocolextendsBaseProtocol8.9. privatefinalstaticStringURL=

14、“ :/localhost:8080/test/login“;10.publicbooleancheckLogin(Userusr)trypack(URL);parse;JSONObjectobj=this.getJSON;if(obj.getString(“result“).equals(“failed“)returnfalse;elsereturntrue;20. catch(Exceptione)e.printStackTrace;returnfalse;24. 25. 26.27. 28.29. tocol;30.31. importorg.j

15、son.JSONObject;32.33. importcom.jclick.bean.User;34.35. publicclassLoginProtocolextendsBaseProtocol36.37.privatefinalstaticStringURL=“ :/localhost:8080/test/login“;38.publicbooleancheckLogin(Userusr)trypack(URL);parse;JSONObjectobj=this.getJSON;if(obj.getString(“result“).equals(“failed“)returnfalse;

16、elsereturntrue;48.catch(Exceptione)e.printStackTrace;returnfalse;5. 然后是User 实体类，主要用于保存用户信息：1. packagecom.jclick.bean;2.publicclassUserprivateStringusername;privateStringpassword;publicStringgetUsername8. publicvoidsetUsername(Stringusername)this.username=username;11. publicStringgetPasswor

17、dreturnpassword;14. publicvoidsetPassword(Stringpassword)this.password=password;17. 18.19. 20.21. packagecom.jclick.bean;22.publicclassUserprivateStringusername;privateStringpassword;publicStringgetUsernamereturnusername;28.publicvoidsetUsername(Stringusername)this.username=username;31.publicStringg

18、etPasswordreturnpassword;34.publicvoidsetPassword(Stringpassword)this.password=password;37.38.39. 最终就是LoginActivity登陆的代码：privatevoidcheckedDatausername=(EditText)findViewById(R.id.username).getText.toString();password=(EditText)findViewById(R.id.password).getText.toString();4.Useruser=newUser;user.setUsername(username);user.setPassword(password);LoginProtocollogin=newLoginProtocol;10.if(result)SpiderCache.