Java开发中的乱码

àì夳堔傛蜴生んèń 2022-03-17 16:12 141阅读 0赞

### 文章目录 ###

*  Action部分
 *  JSP端
 *  android部分

# Action部分 #

public class Test extends BaseAction<UserInfo>{
    	String name;
    	@Action(value="testPost")
        public void testPost(){
    		System.out.println(name);//正常
    		response.setCharacterEncoding("utf-8");
        	try {
    			String str = new String(name.getBytes("ISO-8859-1"), "UTF-8");
    			System.out.println(str);//乱码
        		request.setCharacterEncoding("utf-8");
    			System.out.println(name);//正常
    			response.getWriter().write("汉字");
    		} catch (IOException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
        }
    	@Action(value="testGet")
        public void testGet(){
        	try {
        		String str = new String(name.getBytes("ISO-8859-1"), "UTF-8");
    			System.out.println(str);
    		} catch (UnsupportedEncodingException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
        }
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	
    	
    }

# JSP端 #

<%@ page language="java" contentType="text/html; charset=utf-8"
        pageEncoding="utf-8"%>

# android部分 #

URLEncoder.encode(params,“utf-8”); 必须要有转码。

public class MainActivity extends Activity {
        String name1;
        String name2;
        String ip;
        String responce;
        Handler handler = new Handler(){
            @Override
            public void handleMessage(Message message) {
                if (message.what == 0) {
                    Toast.makeText(getApplicationContext(),message.getData().getString("RES"),Toast.LENGTH_SHORT).show();
                }
            }
        };
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            TextView textView = (TextView)findViewById(R.id.textView);
            name1 = textView.getText().toString();
            EditText edit = findViewById(R.id.editText);
            name2 = edit.getText().toString();
            EditText editText = findViewById(R.id.editText2);
            ip = editText.getText().toString();
            Log.d("test1",name1);
            findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    new Thread() {
                        @Override
                        public void run() {
                            Log.d("test2",name1);
                           // http://10.0.2.2:8081/NewChat/testPost
                            responce = sendHttpPost("http://10.0.2.2:8081/NewChat/testPost",name1+name2);
                            Log.d("test3",name1);
                            Message message = new Message();
                            message.what = 0;
                            Bundle bundle = new Bundle();
                            bundle.putString("RES",responce);
                            message.setData(bundle);
                            handler.sendMessage(message);
                        }
                    }.start();
                }
            });
        }
    
        public static String sendHttpPost(String url, String params){
            PrintWriter out = null;
            BufferedReader in = null;
            String result = "-1";
            try {
                //必须转化
                String str = "name="+URLEncoder.encode(params,"utf-8");
                URL realUrl = new URL(url);
                // 打开和URL之间的连接
                HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
                conn.setRequestMethod("POST");
                conn.setConnectTimeout(8000);
                conn.setReadTimeout(8000);
                conn.setRequestProperty("Charset", "UTF-8");
                conn.setDoOutput(true);
                DataOutputStream outputStream = new DataOutputStream(conn.getOutputStream());
                outputStream.writeBytes(str);
                InputStream inputStream = conn.getInputStream();
                BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
                StringBuilder response = new StringBuilder();
                String line;
                while((line=reader.readLine())!=null){
                    response.append(line);
                }
                result = response.toString();
            }catch (Exception e){
                e.printStackTrace();
            }
            return result;
        }
    
    }