Android快速开发系列 10个常用工具类

Posted 2022-08-12 鸿洋_

转载请标明出处：http://blog.csdn.net/lmj623565791/article/details/38965311，本文出自【张鸿洋的博客】

打开大家手上的项目，基本都会有一大批的辅助类，今天特此整理出10个基本每个项目中都会使用的工具类，用于快速开发~~

在此感谢群里给我发项目中工具类的兄弟/姐妹~

1、日志工具类L.java

package com.zhy.utils;

import android.util.Log;

/**
 * Log统一管理类
 * 
 * 
 * 
 */
public class L


	private L()
	
		/* cannot be instantiated */
		throw new UnsupportedOperationException("cannot be instantiated");
	

	public static boolean isDebug = true;// 是否需要打印bug，可以在application的onCreate函数里面初始化
	private static final String TAG = "way";

	// 下面四个是默认tag的函数
	public static void i(String msg)
	
		if (isDebug)
			Log.i(TAG, msg);
	

	public static void d(String msg)
	
		if (isDebug)
			Log.d(TAG, msg);
	

	public static void e(String msg)
	
		if (isDebug)
			Log.e(TAG, msg);
	

	public static void v(String msg)
	
		if (isDebug)
			Log.v(TAG, msg);
	

	// 下面是传入自定义tag的函数
	public static void i(String tag, String msg)
	
		if (isDebug)
			Log.i(tag, msg);
	

	public static void d(String tag, String msg)
	
		if (isDebug)
			Log.i(tag, msg);
	

	public static void e(String tag, String msg)
	
		if (isDebug)
			Log.i(tag, msg);
	

	public static void v(String tag, String msg)
	
		if (isDebug)
			Log.i(tag, msg);
	

网上看到的类，注释上应该原创作者的名字，很简单的一个类；网上也有很多提供把日志记录到SDCard上的，不过我是从来没记录过，所以引入个最简单的，大家可以进行评价是否需要扩充~~

2、Toast统一管理类 

package com.zhy.utils;

import android.content.Context;
import android.widget.Toast;

/**
 * Toast统一管理类
 * 
 */
public class T


	private T()
	
		/* cannot be instantiated */
		throw new UnsupportedOperationException("cannot be instantiated");
	

	public static boolean isShow = true;

	/**
	 * 短时间显示Toast
	 * 
	 * @param context
	 * @param message
	 */
	public static void showShort(Context context, CharSequence message)
	
		if (isShow)
			Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
	

	/**
	 * 短时间显示Toast
	 * 
	 * @param context
	 * @param message
	 */
	public static void showShort(Context context, int message)
	
		if (isShow)
			Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
	

	/**
	 * 长时间显示Toast
	 * 
	 * @param context
	 * @param message
	 */
	public static void showLong(Context context, CharSequence message)
	
		if (isShow)
			Toast.makeText(context, message, Toast.LENGTH_LONG).show();
	

	/**
	 * 长时间显示Toast
	 * 
	 * @param context
	 * @param message
	 */
	public static void showLong(Context context, int message)
	
		if (isShow)
			Toast.makeText(context, message, Toast.LENGTH_LONG).show();
	

	/**
	 * 自定义显示Toast时间
	 * 
	 * @param context
	 * @param message
	 * @param duration
	 */
	public static void show(Context context, CharSequence message, int duration)
	
		if (isShow)
			Toast.makeText(context, message, duration).show();
	

	/**
	 * 自定义显示Toast时间
	 * 
	 * @param context
	 * @param message
	 * @param duration
	 */
	public static void show(Context context, int message, int duration)
	
		if (isShow)
			Toast.makeText(context, message, duration).show();
	

也是非常简单的一个封装，能省则省了~~

3、SharedPreferences封装类SPUtils

package com.zhy.utils;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Map;

import android.content.Context;
import android.content.SharedPreferences;

public class SPUtils

	/**
	 * 保存在手机里面的文件名
	 */
	public static final String FILE_NAME = "share_data";

	/**
	 * 保存数据的方法，我们需要拿到保存数据的具体类型，然后根据类型调用不同的保存方法
	 * 
	 * @param context
	 * @param key
	 * @param object
	 */
	public static void put(Context context, String key, Object object)
	

		SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
				Context.MODE_PRIVATE);
		SharedPreferences.Editor editor = sp.edit();

		if (object instanceof String)
		
			editor.putString(key, (String) object);
		 else if (object instanceof Integer)
		
			editor.putInt(key, (Integer) object);
		 else if (object instanceof Boolean)
		
			editor.putBoolean(key, (Boolean) object);
		 else if (object instanceof Float)
		
			editor.putFloat(key, (Float) object);
		 else if (object instanceof Long)
		
			editor.putLong(key, (Long) object);
		 else
		
			editor.putString(key, object.toString());
		

		SharedPreferencesCompat.apply(editor);
	

	/**
	 * 得到保存数据的方法，我们根据默认值得到保存的数据的具体类型，然后调用相对于的方法获取值
	 * 
	 * @param context
	 * @param key
	 * @param defaultObject
	 * @return
	 */
	public static Object get(Context context, String key, Object defaultObject)
	
		SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
				Context.MODE_PRIVATE);

		if (defaultObject instanceof String)
		
			return sp.getString(key, (String) defaultObject);
		 else if (defaultObject instanceof Integer)
		
			return sp.getInt(key, (Integer) defaultObject);
		 else if (defaultObject instanceof Boolean)
		
			return sp.getBoolean(key, (Boolean) defaultObject);
		 else if (defaultObject instanceof Float)
		
			return sp.getFloat(key, (Float) defaultObject);
		 else if (defaultObject instanceof Long)
		
			return sp.getLong(key, (Long) defaultObject);
		

		return null;
	

	/**
	 * 移除某个key值已经对应的值
	 * @param context
	 * @param key
	 */
	public static void remove(Context context, String key)
	
		SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
				Context.MODE_PRIVATE);
		SharedPreferences.Editor editor = sp.edit();
		editor.remove(key);
		SharedPreferencesCompat.apply(editor);
	

	/**
	 * 清除所有数据
	 * @param context
	 */
	public static void clear(Context context)
	
		SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
				Context.MODE_PRIVATE);
		SharedPreferences.Editor editor = sp.edit();
		editor.clear();
		SharedPreferencesCompat.apply(editor);
	

	/**
	 * 查询某个key是否已经存在
	 * @param context
	 * @param key
	 * @return
	 */
	public static boolean contains(Context context, String key)
	
		SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
				Context.MODE_PRIVATE);
		return sp.contains(key);
	

	/**
	 * 返回所有的键值对
	 * 
	 * @param context
	 * @return
	 */
	public static Map<String, ?> getAll(Context context)
	
		SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
				Context.MODE_PRIVATE);
		return sp.getAll();
	

	/**
	 * 创建一个解决SharedPreferencesCompat.apply方法的一个兼容类
	 * 
	 * @author zhy
	 * 
	 */
	private static class SharedPreferencesCompat
	
		private static final Method sApplyMethod = findApplyMethod();

		/**
		 * 反射查找apply的方法
		 * 
		 * @return
		 */
		@SuppressWarnings( "unchecked", "rawtypes" )
		private static Method findApplyMethod()
		
			try
			
				Class clz = SharedPreferences.Editor.class;
				return clz.getMethod("apply");
			 catch (NoSuchMethodException e)
			
			

			return null;
		

		/**
		 * 如果找到则使用apply执行，否则使用commit
		 * 
		 * @param editor
		 */
		public static void apply(SharedPreferences.Editor editor)
		
			try
			
				if (sApplyMethod != null)
				
					sApplyMethod.invoke(editor);
					return;
				
			 catch (IllegalArgumentException e)
			
			 catch (IllegalAccessException e)
			
			 catch (InvocationTargetException e)
			
			
			editor.commit();
		
	

对SharedPreference的使用做了建议的封装，对外公布出put，get，remove，clear等等方法；

注意一点，里面所有的commit操作使用了SharedPreferencesCompat.apply进行了替代，目的是尽可能的使用apply代替commit

首先说下为什么，因为commit方法是同步的，并且我们很多时候的commit操作都是UI线程中，毕竟是IO操作，尽可能异步；

所以我们使用apply进行替代，apply异步的进行写入；

但是apply相当于commit来说是new API呢，为了更好的兼容，我们做了适配；

SharedPreferencesCompat也可以给大家创建兼容类提供了一定的参考~~

4、单位转换类 DensityUtils

package com.zhy.utils;

import android.content.Context;
import android.util.TypedValue;

/**
 * 常用单位转换的辅助类
 * 
 * 
 * 
 */
public class DensityUtils

	private DensityUtils()
	
		/* cannot be instantiated */
		throw new UnsupportedOperationException("cannot be instantiated");
	

	/**
	 * dp转px
	 * 
	 * @param context
	 * @param val
	 * @return
	 */
	public static int dp2px(Context context, float dpVal)
	
		return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
				dpVal, context.getResources().getDisplayMetrics());
	

	/**
	 * sp转px
	 * 
	 * @param context
	 * @param val
	 * @return
	 */
	public static int sp2px(Context context, float spVal)
	
		return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
				spVal, context.getResources().getDisplayMetrics());
	

	/**
	 * px转dp
	 * 
	 * @param context
	 * @param pxVal
	 * @return
	 */
	public static float px2dp(Context context, float pxVal)
	
		final float scale = context.getResources().getDisplayMetrics().density;
		return (pxVal / scale);
	

	/**
	 * px转sp
	 * 
	 * @param fontScale
	 * @param pxVal
	 * @return
	 */
	public static float px2sp(Context context, float pxVal)
	
		return (pxVal / context.getResources().getDisplayMetrics().scaledDensity);
	

5、SD卡相关辅助类 SDCardUtils

package com.zhy.utils;

import java.io.File;

import android.os.Environment;
import android.os.StatFs;

/**
 * SD卡相关的辅助类
 * 
 * 
 * 
 */
public class SDCardUtils

	private SDCardUtils()
	
		/* cannot be instantiated */
		throw new UnsupportedOperationException("cannot be instantiated");
	

	/**
	 * 判断SDCard是否可用
	 * 
	 * @return
	 */
	public static boolean isSDCardEnable()
	
		return Environment.getExternalStorageState().equals(
				Environment.MEDIA_MOUNTED);

	

	/**
	 * 获取SD卡路径
	 * 
	 * @return
	 */
	public static String getSDCardPath()
	
		return Environment.getExternalStorageDirectory().getAbsolutePath()
				+ File.separator;
	

	/**
	 * 获取SD卡的剩余容量 单位byte
	 * 
	 * @return
	 */
	public static long getSDCardAllSize()
	
		if (isSDCardEnable())
		
			StatFs stat = new StatFs(getSDCardPath());
			// 获取空闲的数据块的数量
			long availableBlocks = (long) stat.getAvailableBlocks() - 4;
			// 获取单个数据块的大小（byte）
			long freeBlocks = stat.getAvailableBlocks();
			return freeBlocks * availableBlocks;
		
		return 0;
	

	/**
	 * 获取指定路径所在空间的剩余可用容量字节数，单位byte
	 * 
	 * @param filePath
	 * @return 容量字节 SDCard可用空间，内部存储可用空间
	 */
	public static long getFreeBytes(String filePath)
	
		// 如果是sd卡的下的路径，则获取sd卡可用容量
		if (filePath.startsWith(getSDCardPath()))
		
			filePath = getSDCardPath();
		 else
		// 如果是内部存储的路径，则获取内存存储的可用容量
			filePath = Environment.getDataDirectory().getAbsolutePath();
		
		StatFs stat = new StatFs(filePath);
		long availableBlocks = (long) stat.getAvailableBlocks() - 4;
		return stat.getBlockSize() * availableBlocks;
	

	/**
	 * 获取系统存储路径
	 * 
	 * @return
	 */
	public static String getRootDirectoryPath()
	
		return Environment.getRootDirectory().getAbsolutePath();
	

6、屏幕相关辅助类 ScreenUtils

package com.zhy.utils;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.WindowManager;

/**
 * 获得屏幕相关的辅助类
 * 
 * 
 * 
 */
public class ScreenUtils

	private ScreenUtils()
	
		/* cannot be instantiated */
		throw new UnsupportedOperationException("cannot be instantiated");
	

	/**
	 * 获得屏幕高度
	 * 
	 * @param context
	 * @return
	 */
	public static int getScreenWidth(Context context)
	
		WindowManager wm = (WindowManager) context
				.getSystemService(Context.WINDOW_SERVICE);
		DisplayMetrics outMetrics = new DisplayMetrics();
		wm.getDefaultDisplay().getMetrics(outMetrics);
		return outMetrics.widthPixels;
	

	/**
	 * 获得屏幕宽度
	 * 
	 * @param context
	 * @return
	 */
	public static int getScreenHeight(Context context)
	
		WindowManager wm = (WindowManager) context
				.getSystemService(Context.WINDOW_SERVICE);
		DisplayMetrics outMetrics = new DisplayMetrics();
		wm.getDefaultDisplay().getMetrics(outMetrics);
		return outMetrics.heightPixels;
	

	/**
	 * 获得状态栏的高度
	 * 
	 * @param context
	 * @return
	 */
	public static int getStatusHeight(Context context)
	

		int statusHeight = -1;
		try
		
			Class<?> clazz = Class.forName("com.android.internal.R$dimen");
			Object object = clazz.newInstance();
			int height = Integer.parseInt(clazz.getField("status_bar_height")
					.get(object).toString());
			statusHeight = context.getResources().getDimensionPixelSize(height);
		 catch (Exception e)
		
			e.printStackTrace();
		
		return statusHeight;
	

	/**
	 * 获取当前屏幕截图，包含状态栏
	 * 
	 * @param activity
	 * @return
	 */
	public static Bitmap snapShotWithStatusBar(Activity activity)
	
		View view = activity.getWindow().getDecorView();
		view.setDrawingCacheEnabled(true);
		view.buildDrawingCache();
		Bitmap bmp = view.getDrawingCache();
		int width = getScreenWidth(activity);
		int height = getScreenHeight(activity);
		Bitmap bp = null;
		bp = Bitmap.createBitmap(bmp, 0, 0, width, height);
		view.destroyDrawingCache();
		return bp;

	

	/**
	 * 获取当前屏幕截图，不包含状态栏
	 * 
	 * @param activity
	 * @return
	 */
	public static Bitmap snapShotWithoutStatusBar(Activity activity)
	
		View view = activity.getWindow().getDecorView();
		view.setDrawingCacheEnabled(true);
		view.buildDrawingCache();
		Bitmap bmp = view.getDrawingCache();
		Rect frame = new Rect();
		activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
		int statusBarHeight = frame.top;

		int width = getScreenWidth(activity);
		int height = getScreenHeight(activity);
		Bitmap bp = null;
		bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height
				- statusBarHeight);
		view.destroyDrawingCache();
		return bp;

	

7、App相关辅助类

package com.zhy.utils;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;

/**
 * 跟App相关的辅助类
 * 
 * 
 * 
 */
public class AppUtils


	private AppUtils()
	
		/* cannot be instantiated */
		throw new UnsupportedOperationException("cannot be instantiated");

	

	/**
	 * 获取应用程序名称
	 */
	public static String getAppName(Context context)
	
		try
		
			PackageManager packageManager = context.getPackageManager();
			PackageInfo packageInfo = packageManager.getPackageInfo(
					context.getPackageName(), 0);
			int labelRes = packageInfo.applicationInfo.labelRes;
			return context.getResources().getString(labelRes);
		 catch (NameNotFoundException e)
		
			e.printStackTrace();
		
		return null;
	

	/**
	 * [获取应用程序版本名称信息]
	 * 
	 * @param context
	 * @return 当前应用的版本名称
	 */
	public static String getVersionName(Context context)
	
		try
		
			PackageManager packageManager = context.getPackageManager();
			PackageInfo packageInfo = packageManager.getPackageInfo(
					context.getPackageName(), 0);
			return packageInfo.versionName;

		 catch (NameNotFoundException e)
		
			e.printStackTrace();
		
		return null;
	

8、软键盘相关辅助类KeyBoardUtils

package com.zhy.utils;

import android.content.Context;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;

/**
 * 打开或关闭软键盘
 * 
 * @author zhy
 * 
 */
public class KeyBoardUtils

	/**
	 * 打卡软键盘
	 * 
	 * @param mEditText
	 *            输入框
	 * @param mContext
	 *            上下文
	 */
	public static void openKeybord(EditText mEditText, Context mContext)
	
		InputMethodManager imm = (InputMethodManager) mContext
				.getSystemService(Context.INPUT_METHOD_SERVICE);
		imm.showSoftInput(mEditText, InputMethodManager.RESULT_SHOWN);
		imm.toggleSoftInput(InputMethodManager.SHOW_FORCED,
				InputMethodManager.HIDE_IMPLICIT_ONLY);
	

	/**
	 * 关闭软键盘
	 * 
	 * @param mEditText
	 *            输入框
	 * @param mContext
	 *            上下文
	 */
	public static void closeKeybord(EditText mEditText, Context mContext)
	
		InputMethodManager imm = (InputMethodManager) mContext
				.getSystemService(Context.INPUT_METHOD_SERVICE);

		imm.hideSoftInputFromWindow(mEditText.getWindowToken(), 0);
	

9、网络相关辅助类 NetUtils

package com.zhy.utils;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

/**
 * 跟网络相关的工具类
 * 
 * 
 * 
 */
public class NetUtils

	private NetUtils()
	
		/* cannot be instantiated */
		throw new UnsupportedOperationException("cannot be instantiated");
	

	/**
	 * 判断网络是否连接
	 * 
	 * @param context
	 * @return
	 */
	public static boolean isConnected(Context context)
	

		ConnectivityManager connectivity = (ConnectivityManager) context
				.getSystemService(Context.CONNECTIVITY_SERVICE);

		if (null != connectivity)
		

			NetworkInfo info = connectivity.getActiveNetworkInfo();
			if (null != info && info.isConnected())
			
				if (info.getState() == NetworkInfo.State.CONNECTED)
				
					return true;
				
			
		
		return false;
	

	/**
	 * 判断是否是wifi连接
	 */
	public static boolean isWifi(Context context)
	
		ConnectivityManager cm = (ConnectivityManager) context
				.getSystemService(Context.CONNECTIVITY_SERVICE);

		if (cm == null)
			return false;
		return cm.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_WIFI;

	

	/**
	 * 打开网络设置界面
	 */
	public static void openSetting(Activity activity)
	
		Intent intent = new Intent("/");
		ComponentName cm = new ComponentName("com.android.settings",
				"com.android.settings.WirelessSettings");
		intent.setComponent(cm);
		intent.setAction("android.intent.action.VIEW");
		activity.startActivityForResult(intent, 0);
	

10、Http相关辅助类 HttpUtils

package com.zhy.utils;

import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;

/**
 * Http请求的工具类
 * 
 * @author zhy
 * 
 */
public class HttpUtils


	private static final int TIMEOUT_IN_MILLIONS = 5000;

	public interface CallBack
	
		void onRequestComplete(String result);
	


	/**
	 * 异步的Get请求
	 * 
	 * @param urlStr
	 * @param callBack
	 */
	public static void doGetAsyn(final String urlStr, final CallBack callBack)
	
		new Thread()
		
			public void run()
			
				try
				
					String result = doGet(urlStr);
					if (callBack != null)
					
						callBack.onRequestComplete(result);
					
				 catch (Exception e)
				
					e.printStackTrace();
				

			;
		.start();
	

	/**
	 * 异步的Post请求
	 * @param urlStr
	 * @param params
	 * @param callBack
	 * @throws Exception
	 */
	public static void doPostAsyn(final String urlStr, final String params,
			final CallBack callBack) throws Exception
	
		new Thread()
		
			public void run()
			
				try
				
					String result = doPost(urlStr, params);
					if (callBack != null)
					
						callBack.onRequestComplete(result);
					
				 catch (Exception e)
				
					e.printStackTrace();
				

			;
		.start();

	

	/**
	 * Get请求，获得返回数据
	 * 
	 * @param urlStr
	 * @return
	 * @throws Exception
	 */
	public static String doGet(String urlStr) 
	
		URL url = null;
		HttpURLConnection conn = null;
		InputStream is = null;
		ByteArrayOutputStream baos = null;
		try
		
			url = new URL(urlStr);
			conn = (HttpURLConnection) url.openConnection();
			conn.setReadTimeout(TIMEOUT_IN_MILLIONS);
			conn.setConnectTimeout(TIMEOUT_IN_MILLIONS);
			conn.setRequestMethod("GET");
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			if (conn.getResponseCode() == 200)
			
				is = conn.getInputStream();
				baos = new ByteArrayOutputStream();
				int len = -1;
				byte[] buf = new byte[128];

				while ((len = is.read(buf)) != -1)
				
					baos.write(buf, 0, len);
				
				baos.flush();
				return baos.toString();
			 else
			
				throw new RuntimeException(" responseCode is not 200 ... ");
			

		 catch (Exception e)
		
			e.printStackTrace();
		 finally
		
			try
			
				if (is != null)
					is.close();
			 catch (IOException e)
			
			
			try
			
				if (baos != null)
					baos.close();
			 catch (IOException e)
			
			
			conn.disconnect();
		
		
		return null ;

	

	/**
	 * 向指定 URL 发送POST方法的请求
	 * 
	 * @param url
	 *            发送请求的 URL
	 * @param param
	 *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
	 * @return 所代表远程资源的响应结果
	 * @throws Exception
	 */
	public static String doPost(String url, String param) 
	
		PrintWriter out = null;
		BufferedReader in = null;
		String result = "";
		try
		
			URL realUrl = new URL(url);
			// 打开和URL之间的连接
			HttpURLConnection conn = (HttpURLConnection) realUrl
					.openConnection();
			// 设置通用的请求属性
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestMethod("POST");
			conn.setRequestProperty("Content-Type",
					"application/x-www-form-urlencoded");
			conn.setRequestProperty("charset", "utf-8");
			conn.setUseCaches(false);
			// 发送POST请求必须设置如下两行
			conn.setDoOutput(true);
			conn.setDoInput(true);
			conn.setReadTimeout(TIMEOUT_IN_MILLIONS);
			conn.setConnectTimeout(TIMEOUT_IN_MILLIONS);

			if (param != null && !param.trim().equals(""))
			
				// 获取URLConnection对象对应的输出流
				out = new PrintWriter(conn.getOutputStream());
				// 发送请求参数
				out.print(param);
				// flush输出流的缓冲
				out.flush();
			
			// 定义BufferedReader输入流来读取URL的响应
			in = new BufferedReader(
					new InputStreamReader(conn.getInputStream()));
			String line;
			while ((line = in.readLine()) != null)
			
				result += line;
			
		 catch (Exception e)
		
			e.printStackTrace();
		
		// 使用finally块来关闭输出流、输入流
		finally
		
			try
			
				if (out != null)
				
					out.close();
				
				if (in != null)
				
					in.close();
				
			 catch (IOException ex)
			
				ex.printStackTrace();
			
		
		return result;
	

如果大家在使用过程中出现什么错误，或者有更好的建议，欢迎大家留言提出~~可以不断的改进这些类~

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