App Development History---1,servlet return JSON as an instance of the Android interface

Recent company leaders to do the app, although they used to do the app test, but a lot of things are not very clear, here to record their history of this period of life.

1, build the server side, before doing the test, they use is apache+mysql+php, and their school when contact with some Java knowledge, use Java+servlet+jsp+sqlserver+tomcat to do.

2, because they have not written code for a long time, all writing is a comparative basis of the example. The following is an example of the Android parsing JSON data based on the Baidu Library.

First server side:

1 <?XML version= "1.0" encoding= "UTF-8"?>2 <Web-appID= "webapp_id"version= "2.4"xmlns= "HTTP://JAVA.SUN.COM/XML/NS/J2EE"Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"xsi:schemalocation= "Http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">3     <Display-name>Servlettest</Display-name>4     <welcome-file-list>5         <Welcome-file>Index.html</Welcome-file>6         <Welcome-file>Index.htm</Welcome-file>7         <Welcome-file>index.jsp</Welcome-file>8         <Welcome-file>Default.html</Welcome-file>9         <Welcome-file>Default.htm</Welcome-file>Ten         <Welcome-file>default.jsp</Welcome-file> One     </welcome-file-list> A      -      -     <servlet> the     <Servlet-name>Test</Servlet-name> -     <Servlet-class>Com.android.servlet.ServletDemo</Servlet-class>     -     </servlet> -     <servlet-mapping> +     <Servlet-name>Test</Servlet-name> -     <Url-pattern>/test</Url-pattern> +     </servlet-mapping> A </Web-app>

Servletdemo.class

1  PackageCom.android.servlet;2 3 Importjava.io.IOException;4 ImportJava.io.PrintWriter;5 Importjava.util.ArrayList;6 Importjava.util.List;7 8 Importjavax.servlet.ServletException;9 ImportJavax.servlet.http.HttpServlet;Ten Importjavax.servlet.http.HttpServletRequest; One ImportJavax.servlet.http.HttpServletResponse; A  - ImportNet.sf.json.JSONArray; - ImportNet.sf.json.JSONObject; the  -  Public classServletdemoextendsHttpServlet { -      -     PrivateList<user>list; + @Override -     protected voiddoget (httpservletrequest req, HttpServletResponse resp) +             throwsservletexception, IOException { A         //TODO auto-generated Method Stub at          -          -Resp.setcontenttype ("Text/plain"); -Resp.setcharacterencoding ("Utf-8"); -PrintWriter out=Resp.getwriter (); -          inlist=Praparedata (); - //Out.write (list.tostring ()); +          A          theJsonarray array=NewJsonarray (); +          -          for(User bean:list) $         { $Jsonobject obj=NewJsonobject (); -              -             Try{ the              -                 WuyiObj.put ("id", Bean.getid ()); theObj.put ("name", Bean.getname ()); -Obj.put ("Email", Bean.getemail ()); WuObj.put ("Gender", Bean.getgender ()); -                  About                  $             } -             Catch(Exception e) { -                  -             } A              +              the array.add (obj); -              $              the         } the Out.write (array.tostring ()); the //out.write ("Nihao!!!!"); the Out.flush (); - out.close (); in          the          the     } About      the @Override the     protected voidDoPost (httpservletrequest req, HttpServletResponse resp) the             throwsservletexception, IOException { +         //TODO auto-generated Method Stub -         Super. Doget (req, resp); the     }Bayi     PrivateList<user>Praparedata () the     { thelist=NewArraylist<user>(); -          -User user1=NewUser (); theUser1.setid (1001); theUser1.setname ("What a Thing"); theUser1.setemail ("[Email protected]"); theUser1.setgender ("Male"); - List.add (user1); the          the         returnlist; the     94     } the  the}

User

1  PackageCom.android.servlet;2 3  Public classUser {4     Private intID;5     PrivateString name;6     PrivateString Email;7     PrivateString gender;8      Public intgetId () {9         returnID;Ten     } One      Public voidSetId (intID) { A          This. ID =ID; -     } -      PublicString GetName () { the         returnname; -     } -      Public voidsetName (String name) { -          This. Name =name; +     } -      PublicString Getemail () { +         returnemail; A     } at      Public voidsetemail (String email) { -          This. email =email; -     } -      PublicString Getgender () { -         returngender; -     } in      Public voidSetgender (String gender) { -          This. Gender =gender; to     } +      -  the}

Enter the address in the browser: http://localhost:8080/ServletTest/test (note, if it is another computer on the LAN, change the localhost to the IP address of the one you want to access.)

[{"id": 1001, "name": "What Thing", "email": "[email protected]", "gender": "Male"}]
Not to be continued
Step by step, slowly will be better, believe in yourself!

App Development History---1,servlet return JSON as an instance of the Android interface