#Java
java操作mongoDB实现CURD
java操作mongoDB mongoDB作为一个牛气哄哄的nosql内存数据库，的确有很多优点，对于大数据量、高并发、弱事务的互联网应用，MongoDB可以应对自如。接触 到mo…
#Java
android很实用的工具类
public class CommonUtil { public static boolean hasSDCard() { String status = Environment.…
#Java
Android中屏蔽"电源键长按"、"Home键"、"Home键长按"
这几个“按键”的触发，都会产生一个 Action == Intent.ACTION_CLOSE_SYSTEM_DIALOGS 的通知区分他们三个的不同事件的参数，就是随着…
#Java
Java加密算法 RSA
公钥加密也称为非对称加密、速度慢、加密和解密的钥匙不相同，某一个人持有私钥，任何人都可以知道公钥 import java.security.KeyPair; import java…
#Java
Android的三种图片压缩方法
一、图片质量压缩 /** * 质量压缩方法 * * @param image * @return */ public static Bitmap compressImage(Bit…
#Java
Java数字摘要 MD5
import java.io.ByteArrayInputStream; import java.io.File; import java.io.FileInputStream; …
#Java
android后台发送邮件
public class SendEmail { private static final String TAG = "SendEmail"; //要发送Ema…
#Java
Executors 工具类 创建 的 线程池
import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import…
#Java
MD5加密算法的java实现
import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; /* * MD…
#Java
Android 旋转图片
import android.app.Activity; import android.graphics.Bitmap; import android.graphics.Matri…
#Java
使用Jasypt来加密解密的Java示例代码
加密： import org.jasypt.encryption.pbe.StandardPBEStringEncryptor; import org.jasypt.encrypt…
#Java
android 字体大小 根据分辨率 自动调整
手机设备太多，分辨率也不一样，看到网上大部分的适应字体的方法是定义values320×480或value-hdpi方式去处理。 采用第一种的就惨了，很多设备…
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