android开发--android-async-http

做了个demo,主要用android-async-http第三方库中AsyncHttpClient来实现对服务器上传(1)简单键值对数据,(2)json数据以及(3)文件资源.
一.android客户端
tip:需要往libs中导入android-async-http的jar包
下载 android-async-http jar 包
1.UI布局文件main_activity.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.min.myandroid_async_http.MainActivity" >    <TextView        android:id="@+id/tv1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center_horizontal"        android:text="上传登录信息"        android:textSize="16sp" >        <requestFocus />    </TextView>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="horizontal" >        <EditText            android:id="@+id/et_name"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:ems="12"            android:hint="登录名" >        </EditText>        <EditText            android:id="@+id/et_pw"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:ems="12"            android:hint="登录密码" />    </LinearLayout>    <Button        android:id="@+id/btn_upload_1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="提交" />    <TextView        android:id="@+id/tv2"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center_horizontal"        android:layout_marginTop="20dp"        android:text="上传Json"        android:textSize="16sp" >    </TextView>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="horizontal" >        <EditText            android:id="@+id/et_sex"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:ems="12"            android:hint="性别" >        </EditText>        <EditText            android:id="@+id/et_age"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:ems="12"            android:hint="年龄" />    </LinearLayout>    <Button        android:id="@+id/btn_upload_2"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="确定" />    <Button        android:id="@+id/btn_upload_3"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="上传文件" /></LinearLayout>

UI效果如下:

(1)et_name,et_pw用来提交键值对数据,tv1显示btn_upload_1提交后获取服务器返回的数据信息
(2)et_sex,et_age用来输入数据(这些数据会封装成jsonobject),tv2显示btn_upload_2提交后获取服务器返回的数据信息
(3)btn_upload_3文件上传按钮

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2.MainActivity.java代码:

package com.min.myandroid_async_http;import java.io.File;import java.io.FileNotFoundException;import org.apache.http.Header;import org.apache.http.protocol.HTTP;import org.json.JSONException;import org.json.JSONObject;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;import android.widget.Toast;import com.loopj.android.http.AsyncHttpClient;import com.loopj.android.http.JsonHttpResponseHandler;import com.loopj.android.http.RequestParams;import com.loopj.android.http.TextHttpResponseHandler;public class MainActivity extends Activity {    private Button btn_upload_1;    private Button btn_upload_2;    private Button btn_upload_3;    private EditText et_name;    private EditText et_pw;    private EditText et_sex;    private EditText et_age;    private TextView tv1;    private TextView tv2;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        // 初始化控件        init();        // 提交登录事件监听        btn_upload_1.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                uploadData();                et_name.setText("");                et_pw.setText("");                // Toast.makeText(getApplicationContext(), "你click1",                // Toast.LENGTH_SHORT).show();            }        });        // 提交json数据监听        btn_upload_2.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                uploadJson();//              Toast.makeText(getApplicationContext(), "你click2",//                      Toast.LENGTH_SHORT).show();            }        });        //上传文件监听        btn_upload_3.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                uploadFile();                // Toast.makeText(getApplicationContext(), "你click3",                // Toast.LENGTH_SHORT).show();            }        });    }    private void init() {        tv1 = (TextView) findViewById(R.id.tv1);        btn_upload_1 = (Button) findViewById(R.id.btn_upload_1);        btn_upload_2 = (Button) findViewById(R.id.btn_upload_2);        btn_upload_3 = (Button) findViewById(R.id.btn_upload_3);        et_age = (EditText) findViewById(R.id.et_age);        et_name = (EditText) findViewById(R.id.et_name);        et_pw = (EditText) findViewById(R.id.et_pw);        et_sex = (EditText) findViewById(R.id.et_sex);        tv2 = (TextView) findViewById(R.id.tv2);    }    public void uploadData() {        // 传递的参数设置        RequestParams requestParams = new RequestParams();        // 设置编码        requestParams.setContentEncoding(HTTP.UTF_8);        requestParams.put("name", et_name.getText().toString());        requestParams.put("password", et_pw.getText().toString());        // 获取AsyncHttpClient对象        AsyncHttpClient client = new AsyncHttpClient();        String urladdress = "http://10.0.3.2:8080/MyServer/async";        client.post(urladdress, requestParams, new TextHttpResponseHandler(                "UTF-8") {            @Override            // 当得到正确响应,以字符串形式返回            public void onSuccess(int arg0, Header[] arg1, String result) {                tv1.setText(result);                Log.i("result", result);            }            @Override            // 当访问出错响应            public void onFailure(int arg0, Header[] arg1, String arg2,                    Throwable arg3) {            }        });    }    protected void uploadJson() {        String urladdress = "http://10.0.3.2:8080/MyServer/asyncjson";        RequestParams requestParams = new RequestParams();        JSONObject jObject = new JSONObject();        try {            jObject.put("set", et_sex.getText().toString());            jObject.put("age", et_age.getText().toString());            requestParams.setContentEncoding(HTTP.UTF_8);            requestParams.put("info", jObject);            AsyncHttpClient client = new AsyncHttpClient();            client.post(urladdress, requestParams,                    new JsonHttpResponseHandler() {                        @Override                        public void onSuccess(int statusCode, Header[] headers,                                JSONObject response) {                            tv2.setText(response.toString());                        }                        @Override                        public void onFailure(int statusCode, Header[] headers,                                String responseString, Throwable throwable) {                            super.onFailure(statusCode, headers,                                    responseString, throwable);                        }                    });        } catch (JSONException e) {            e.printStackTrace();        }    }    public void uploadFile() {        String urladdress = "http://10.0.3.2:8080/MyServer/asyncfile";        RequestParams requestParams = new RequestParams();        requestParams.setContentEncoding(HTTP.UTF_8);        File file = new File("/data/anr/traces.txt");        try {            requestParams.put("myfile", file);            AsyncHttpClient client = new AsyncHttpClient();            client.post(urladdress, requestParams,                    new TextHttpResponseHandler() {                        @Override                        public void onSuccess(int arg0, Header[] arg1,                                String result) {                            // TODO Auto-generated method stub                            System.out.println(result);                            Toast.makeText(getApplicationContext(), result,                                    Toast.LENGTH_SHORT).show();                        }                        @Override                        public void onFailure(int arg0, Header[] arg1,                                String arg2, Throwable arg3) {                            // TODO Auto-generated method stub                            System.out.println("上传失败");                        }                    });        } catch (FileNotFoundException e) {            e.printStackTrace();        }    }}

最后记得给予网络访问权限,在manifest.xml中,

<uses-permission android:name="android.permission.INTERNET"/>

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二.servlet服务端编程:
用了3个servlet对应3中提交处理:
处理键值对参数:AsyncHttpClient.java(servlet):

package com.min.servlet;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class AsyncHttpClient extends HttpServlet {    private static final long serialVersionUID = 1L;    public void doGet(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        System.out                .println("--------------------async_get----------------------");        request.setCharacterEncoding("UTF-8");        response.setCharacterEncoding("UTF-8");        PrintWriter out = response.getWriter();        out.println("<HTML>");        out.flush();        out.close();    }    public void doPost(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        System.out.println("-----------------async_post-------------");        request.setCharacterEncoding("UTF-8");        response.setCharacterEncoding("UTF-8");        String name = request.getParameter("name");        String pw = request.getParameter("password");        PrintWriter out = response.getWriter();        System.out.println("name="+name+"&&password="+pw);        if (name.equals("jack") && pw.equals("12345")) {            out.print("登录信息正确");        } else {            out.print("登录信息有误");        }        out.flush();        out.close();    }}

处理提交的json数据:AsyncJson.java(servlet):
需要导入json包到servlet的项目中
下载 json jar 包

package com.min.servlet;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.json.JSONException;import org.json.JSONObject;public class AsyncJson extends HttpServlet {    private static final long serialVersionUID = 1L;    public void doGet(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        System.out.println("------------------get_json--------------");        response.setContentType("text/html");        PrintWriter out = response.getWriter();        out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");        out.println("<HTML>");        out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");        out.println("  <BODY>");        out.print("    This is ");        out.print(this.getClass());        out.println(", using the GET method");        out.println("  </BODY>");        out.println("</HTML>");        out.flush();        out.close();    }    public void doPost(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        System.out.println("--------------post_json------------");        request.setCharacterEncoding("UTF-8");        response.setCharacterEncoding("UTF-8");        JSONObject jObject;        try {            jObject = new JSONObject(request.getParameter("info"));            System.out.println(jObject.toString());            PrintWriter out = response.getWriter();            out.print(jObject);            out.flush();            out.close();        } catch (JSONException e) {            e.printStackTrace();        }    }}

处理文件上传:AsyncFile.java(servlet):
这里用到了第三方jar,需要导入commons-fileupload和commons-io的jar包
下载 commons-fileupload jar 包
下载commons-io jar包

package com.min.servlet;import java.io.File;import java.io.IOException;import java.io.PrintWriter;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.fileupload.FileItem;import org.apache.commons.fileupload.FileUploadException;import org.apache.commons.fileupload.disk.DiskFileItemFactory;import org.apache.commons.fileupload.servlet.ServletFileUpload;public class AsyncFile extends HttpServlet {    private static final long serialVersionUID = 1L;    public void doGet(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        System.out.println("---------------get_file-------------");        response.setCharacterEncoding("UTF-8");        PrintWriter out = response.getWriter();        out.print("get请求");        out.flush();        out.close();    }    public void doPost(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        System.out.println("-------------post_file-----------");        response.setCharacterEncoding("UTF-8");        PrintWriter out = response.getWriter();        // 1、创建一个DiskFileItemFactory工厂        DiskFileItemFactory factory = new DiskFileItemFactory();        // 配置好缓存区        // factory.setSizeThreshold(1024*1024*2);        // File folder=new File("c:\\EFI");        // if(!folder.exists()){        // folder.mkdir();        // }        // factory.setRepository(folder);        // 2、创建一个文件上传解析器        ServletFileUpload upload = new ServletFileUpload(factory);        // 解决上传文件名的中文乱码        upload.setHeaderEncoding("UTF-8");        // 设置提交的最大文件类型数据的大小        upload.setSizeMax(1024 * 1024 * 20);        // 设置提交的数据的大小        upload.setFileSizeMax(1024 * 1024 * 25);        // 判断提交上来的数据是否是复杂类型数据的提交,如果是文件提交,则为复杂类型        if (!ServletFileUpload.isMultipartContent(request)) {            // 按照传统方式获取数据            System.out.println("简单类型提交");            return;        } else {            // 处理文件提交            try {                List<FileItem> lists = upload.parseRequest(request);                if (lists != null) {                    for (FileItem item : lists) {                        //判断一个参数域是普通的表单输入域，还是文件上传域                        if (item.isFormField()) {                            //上传的没有这类型的,不做处理//                          if(item.getName().equals("json")){//                              //                          }                        } else {                            // System.out.println(item.getName());                            // System.out.println(item.getFieldName());                            try {                                // 以文件形式存入到对应目录下                                item.write(new File("D:\\" + item.getName()));                                out.write("文件上传成功");                                out.flush();                                out.close();                            } catch (Exception e) {                                e.printStackTrace();                            }                        }                    }                }            } catch (FileUploadException e) {                e.printStackTrace();            }        }    }}

tip:请配置好web.xml:

 <servlet-mapping>    <servlet-name>AsyncHttpClient</servlet-name>    <url-pattern>/async</url-pattern>  </servlet-mapping>  <servlet-mapping>    <servlet-name>AsyncJson</servlet-name>    <url-pattern>/asyncjson</url-pattern>  </servlet-mapping>  <servlet-mapping>    <servlet-name>AsyncFile</servlet-name>    <url-pattern>/asyncfile</url-pattern>  </servlet-mapping>    

关于android客户端访问地址:用原生模拟器:10.0.2.2;genymotion模拟器为10.0.3.2