Android攻城狮 post、get传递参数及乱码问题

 

public class RegistActivity extends Activity {

    private EditText name, age;
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.register);
        name = (EditText) findViewById(R.id.editText2name);
        age = (EditText) findViewById(R.id.editText1age);
        button = (Button) findViewById(R.id.button1);
        
        button.setOnClickListener(new OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                String url="http://172.16.166.195:8080/web/Myservlet";
                new HttpThread1(url, name.getText().toString(), age.getText().toString()).start();
            
            
            }
        });
    }

 1 public class HttpThread1 extends Thread {

    String url, name, age;

    public HttpThread1(String ur, String name, String age) {
        // TODO Auto-generated constructor stub
        this.url = ur;
        this.name = name;
        this.age = age;
    }

    private void doGet() {
        try {
            url = url + "?name=" +URLEncoder.encode(name, "utf-8") + "&age=" + age;
        } catch (UnsupportedEncodingException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        try {
            URL httpUrl = new URL(url);
            try {
                HttpURLConnection connection = (HttpURLConnection) httpUrl
                        .openConnection();

                connection.setRequestMethod("GET");
                connection.setReadTimeout(5000);

                BufferedReader reader = new BufferedReader(
                        new InputStreamReader(connection.getInputStream()));

                String str;
                StringBuffer sBuffer = new StringBuffer();
                while ((str = reader.readLine()) != null) {
                    sBuffer.append(str);
                }
                System.out.println("result=" + sBuffer.toString());
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    // ------------------------------------

    private void doPost() {
        try {
            URL httpUrl = new URL(url);
            HttpURLConnection connection = (HttpURLConnection) httpUrl
                    .openConnection();
            connection.setRequestMethod("POST");
            connection.setReadTimeout(5000);
            OutputStream out = connection.getOutputStream();
            String content = "name=" + name + "&age=" + age;
            out.write(content.getBytes());
            BufferedReader reader = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            StringBuffer sbBuffer = new StringBuffer();
            String str;

            while ((str = reader.readLine()) != null) {

                sbBuffer.append(str);

            }
            System.out.println(sbBuffer.toString());
        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

    @Override
    public void run() {
        // TODO Auto-generated method stub
        // doGet();
        doPost();
    }
}

后台服务器出现中文乱码的原因：浏览器给后台提交数据的时候，Servlet默认使用“iso-8859-1”的编码格式，和服务器的编码格式不同。
解决方法：在 Servlet 中进行转码操作，如图。
new String(name.getBytes("iso-8859-1","utf-8"))：先把字符串按照"iso-8859-1"格式转码并转换为字节，再按照"utf-8"格式转码，并转换为字符串。
设置响应头接收的文本类型：response.setContentType("text/html;charset=utf-8"); //文本类型是html，编码格式是utf-8。

客户端使用doGet()方式提交数据，如果含有中文字符，可能就会产生乱码，解决方法：使用 URLEncode.encode(String, "utf-8")进行转码。
举例：url = url + "?name=" + URLEncode.encode(name,"utf-8") + "&age="+age;

而doPost()不用进行转码，因为 Android 手机默认使用的编码格式就是“utf-8”。

那么，如何查看手机使用的编码格式呢？可以先获取手机的系统的属性配置文件（示例代码是写在线程的doPost()方法中）：
Properties property = System.getProperties();
打印出配置文件的信息：
property.list( System.out );
运行后，会在后台看到一条信息：file.encoding=UTF-8。
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摘自评论区：
post请求时，只要req.setCharacterEncoding("UTF-8");这样就可以告诉服务器请求以utf-8编码解析，直接就是正确的中文