java - Android 中的 JSON 数据加密和解密

Question

我正在尝试通过发送请求进行加密和解密，并从我的 Android 应用程序中的服务器获取响应，并且我使用了 JSON Web 服务，但我收到了 RuntimeException。我不知道该怎么做。

这是我的 Activity 代码。

   public class MainActivity extends Activity implements OnClickListener {

   Button btnPost;

    static String key="Dyv6ACIDe2q+OEjztjfNDw==";
    Person person;
    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

         btnPost = (Button) findViewById(R.id.btnPost);
         btnPost.setOnClickListener(this);

    }


    static String RequestId="3465768789";
    static String strRequestCode="001";
    static String stringChannelId="MobileApp";
    static String strIpAddress = "192.168.1.123";
    static String strStatusFlag="true";
    static String strUserId="test@test.com";
    static String strPassword="password1";
    static String strVendorId="001";
    static String strRequestId="09";
    static String strRequest="CLIENT";


 public static String POST(String url, Person person)
    {
        InputStream inputStream = null;
        String result = "";
        try {


            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost(url);

            String json = "";

            JSONObject jsonObject = new JSONObject();

            jsonObject.accumulate("RequestId", strRequestId);
            jsonObject.accumulate("RequestCode", strRequestCode);
            jsonObject.accumulate("ChannelId", stringChannelId);
            jsonObject.accumulate("IPAddress", strIpAddress);
            jsonObject.accumulate("ForceChangeFlag",strStatusFlag);
            jsonObject.accumulate("UserId", strUserId);
            jsonObject.accumulate("Password",strPassword);
            jsonObject.accumulate("Request",strRequest );
            jsonObject.accumulate("VendorId", strVendorId);


            json = jsonObject.toString();


            String reqvalues=AES128Bit.encrypt(jsonObject.toString().toString(),key);

            Log.e("Reqvalues","  = "+reqvalues);

            StringEntity se = new StringEntity(reqvalues);


            httpPost.setEntity(se);

            httpPost.setHeader("Accept", "application/json");
            httpPost.setHeader("Content-type", "application/json");

            HttpResponse httpResponse = httpclient.execute(httpPost);
            inputStream = httpResponse.getEntity().getContent();


            if(inputStream != null)
                result = convertInputStreamToString(inputStream);
            else
                result = "Did not work!";

        }

        catch (Exception e) 
        {
            Log.d("InputStream", e.getLocalizedMessage());
        }
         return result;
    }


 @Override
    public void onClick(View view) 
      {
           new  HttpAsyncTask().execute("http://test.window2india.com/cms/json/w2iWS");
      }

    }



private class HttpAsyncTask extends AsyncTask<String, Void, String> {
        @Override
        protected String doInBackground(String... urls)
        {

            person = new Person();
            person.setRequestId(strRequestId);
            person.setRequestCode(strRequestCode);
            person.setChannelId(stringChannelId);
            person.setIPAddress(strIpAddress);
            person.setStatusFlag(strStatusFlag);
            person.setUserId(strUserId);
            person.setPassword(strPassword);
            person.setRequest(strRequest);
            person.setVendorId(strVendorId);

            String strPerson=person.toString();


            Log.e("strPerson ", " =" + strPerson);

            return POST(urls[0],person);
        }

        // onPostExecute displays the results of the AsyncTask.
        @Override
        protected void onPostExecute(String result) {
            Toast.makeText(getBaseContext(), "Data Sent!", Toast.LENGTH_LONG).show();
       }
    }


 private static String convertInputStreamToString(InputStream inputStream) throws IOException{
        BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));
        String line = "";
        String result = "";
        while((line = bufferedReader.readLine()) != null)
            result += line;

        inputStream.close();
        return result;

    }   
}

这里是日志猫信息。

12-28 10:21:15.183: I/dalvikvm(417): Could not find method com.anm.cms.core.util.AES128Bit.encrypt, referenced from method com.json_to_server.MainActivity.POST
    12-28 10:21:15.223: W/dalvikvm(417): VFY: unable to resolve static method 5048: Lcom/anm/cms/core/util/AES128Bit;.encrypt (Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;
    12-28 10:21:15.223: D/dalvikvm(417): VFY: replacing opcode 0x71 at 0x0061
    12-28 10:21:15.362: D/dalvikvm(417): VFY: dead code 0x0064-00a0 in Lcom/json_to_server/MainActivity;.POST (Ljava/lang/String;Lcom/json_to_server/Person;)Ljava/lang/String;
    12-28 10:21:15.362: D/dalvikvm(417): VFY: dead code 0x00a2-00a4 in Lcom/json_to_server/MainActivity;.POST (Ljava/lang/String;Lcom/json_to_server/Person;)Ljava/lang/String;
    12-28 10:21:33.963: E/strPerson(417):  =com.json_to_server.Person@40527d08
    12-28 10:21:33.993: W/dalvikvm(417): threadid=9: thread exiting with uncaught exception (group=0x40015560)
    12-28 10:21:34.003: E/AndroidRuntime(417): FATAL EXCEPTION: AsyncTask #1
    12-28 10:21:34.003: E/AndroidRuntime(417): java.lang.RuntimeException: An error occured while executing doInBackground()
    12-28 10:21:34.003: E/AndroidRuntime(417):  at android.os.AsyncTask$3.done(AsyncTask.java:200)
    12-28 10:21:34.003: E/AndroidRuntime(417):  at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:274)
    12-28 10:21:34.003: E/AndroidRuntime(417):  at java.util.concurrent.FutureTask.setException(FutureTask.java:125)
    12-28 10:21:34.003: E/AndroidRuntime(417):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:308)
    12-28 10:21:34.003: E/AndroidRuntime(417):  at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    12-28 10:21:34.003: E/AndroidRuntime(417):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1088)
    12-28 10:21:34.003: E/AndroidRuntime(417):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:581)
    12-28 10:21:34.003: E/AndroidRuntime(417):  at java.lang.Thread.run(Thread.java:1019)
    12-28 10:21:34.003: E/AndroidRuntime(417): Caused by: java.lang.NoClassDefFoundError: com.anm.cms.core.util.AES128Bit
    12-28 10:21:34.003: E/AndroidRuntime(417):  at com.json_to_server.MainActivity.POST(MainActivity.java:120)
    12-28 10:21:34.003: E/AndroidRuntime(417):  at com.json_to_server.MainActivity$HttpAsyncTask.doInBackground(MainActivity.java:202)
    12-28 10:21:34.003: E/AndroidRuntime(417):  at com.json_to_server.MainActivity$HttpAsyncTask.doInBackground(MainActivity.java:1)
    12-28 10:21:34.003: E/AndroidRuntime(417):  at android.os.AsyncTask$2.call(AsyncTask.java:185)
    12-28 10:21:34.003: E/AndroidRuntime(417):  at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:306)
    12-28 10:21:34.003: E/AndroidRuntime(417):  ... 4 more

Answer 1

您的 logcat 指出您没有在类路径中保留所需的库(可能构建路径可以引用它，因此您不会收到编译错误)。

12-28 10:21:34.003: E/AndroidRuntime(417): Caused by: java.lang.NoClassDefFoundError: com.anm.cms.core.util.AES128Bit

请确保您也在类路径中引用了正确的库。

编辑:您也可以尝试通过以下过程确保 jar 在运行时可用；

1. 转到Java 构建路径和订购和导出选项卡
2. 确保您的外部 jar 已被“检查”
3. 将其移至列表顶部