JAVA JNI
http://blog.csdn.net/hbcui1984/archive/2009/12/10/4980805.aspx
Ò»¡¢¸ÅÊö
JNI(java native interface)£¬JAVA±¾µØ½Ó¿Úµ÷Óã¬Ä¿µÄÊÇΪÁËJAVA¿ÉÒÔµ÷Óñ¾µØ³ÌÐò£¬Ö÷ÒªÓŵãÓУº
Ìá¸ßЧÂÊ£¬½â¾öÐÔÄÜÎÊÌâ
·ÀÖ¹·´±àÒ룬Ìá¸ßºËÐÄ´úÂ밲ȫÐÔ
ÔöÇ¿±¾»ú½Ó¿Úµ÷ÓÃ
ǶÈëʽ¿ª·¢Ó¦ÓÃ
ÈçÏÂͨ¹ýÒ»¸ö×î¼òµ¥µÄСdemo£¬ÑÝʾÈçºÎ½øÐÐjni¿ª·¢¡£
¶þ¡¢demoÑÝʾ
1. н¨JAVAÎļþ
н¨Ò»¸öjavaÀ࣬ÈçÏ£º
view plaincopy to clipboardprint?
package chb.test.jni;
public class HelloJni {
public native void sayHello();
static {
System.loadLibrary("hellojni");
}
public static void main(String[] args) {
new HelloJni().sayHello();
}
}
package chb.test.jni;
public class HelloJni {
public native void sayHello();
static {
System.loadLibrary("hellojni");
}
public static void main(String[] args) {
new HelloJni().sayHello();
}
}
HelloJni.javaÔÚÓ²ÅÌÉϵÄλÖãºD:\workspace\MyWork\src\chb\test\jni\HelloJni.java
2. Éú³ÉclassÎļþ
1) ÀûÓÃjavacÃüÁî½øÐбàÒ룬½øÈëD:\workspace\MyWork\src\chb\test\jniĿ¼£¬ÀûÓÃ
view plaincopy to clipboardprint?
javac HelloJni.java
javac HelloJni.java
2) ÀûÓÃIDE£¬ÀýÈçÎÒÀûÓÃeclipse¿ª·¢£¬×Ô¶¯±àÒ룬±àÒëºóµÄÎļþλÓÚ£ºD
Ïà¹ØÎĵµ£º
ÔÚjavaÖУ¬¼ÙÉèÄãÓÐÒ»¸öuser ¶ÔÏóµÄlist£¬´Ëuser¶ÔÏó·â×°ÁËÓû§µÄid, first name, last name and age. È»ºóÄãÏëµ÷ÓÃÒ»¸öweb service(eg. UserService.deleteUsersByIds(List<Integer> userIds) ȥɾ³ýÊý¾Ý¿âÖÐÖ¸¶¨µÄÕâЩuser¡£ ÌýÆðÀ´Ëƺõ²»Ì«À§ÄÑ£¬²»ÊÇô? ÄãËùÐèÒªÖ»Êǽ« List<User> ת»¯³ÉList&l ......
ҪʹÓÃdom4j¶ÁдXMLÎĵµ,ÐèÒªÏÈÏÂÔØdom4j°ü,dom4j¹Ù·½ÍøÕ¾ÔÚ http://www.dom4j.org/
Ŀǰ×îÐÂdom4j°üÏÂÔØµØÖ·: http://nchc.dl.sourceforge.net/sourceforge/dom4j/dom4j-1.6.1.zip
½â¿ªºóÓÐÁ½¸ö°ü,½ö²Ù×÷XMLÎĵµµÄ»°°Ñdom4j-1.6.1.jar¼ÓÈ빤³Ì¾Í¿ÉÒÔÁË,Èç¹ûÐèҪʹÓÃXPathµÄ»°»¹ÐèÒª¼ÓÈë°üjaxen-1.1-beta-7.jar.
ÒÔÏÂ ......
ÊÂÎñ´¦Àí×ܽá
À´Ô´£ºhttp://space.itpub.net/13956325/viewspace-598381
Ò»¡¢Ê²Ã´ÊÇJava ÊÂÎñ
ͨ³£µÄ¹ÛÄîÈÏΪ£¬ÊÂÎñ½öÓëÊý¾Ý¿â Ïà¹Ø¡£
Ê Îñ±ØÐë·þ´ÓISO/IECËùÖÆ¶¨µÄACIDÔÔò¡£ACIDÊÇÔ×ÓÐÔ£¨atomicity£©¡¢Ò»ÖÂÐÔ£¨consistency£©¡¢¸ôÀëÐÔ £¨isolation£©ºÍ³Ö¾ÃÐÔ£¨durability£©µÄËõд¡£ÊÂÎñµÄÔ×ÓÐÔ±íʾÊÂÎñ ......
public class TestClass{
public static void main(String args[]){
VarArgs(1, "one");
VarArgs(2, "one", "two");
VarArgs(3, "one", "two", "three");
VarArgs(0); // Attention!
}
static void VarArgs(int nRequired, String... trailing){
System.out.print("Required: " + nRequired + " ");
......
ÔÚJava concurrent°üÖÐÓÐÕâôһ¸ö½Ó¿Ú£ºConcurrentMap¡£
ConcurrentMap¼Ì³Ð×ÔMap£¬²¢Ìí¼ÓÁ˼¸¸öеÄÔ×Ó·½·¨£º putIfAbsent¡¢remove¡¢replace
Æä·½·¨ÕªÒªÈçÏ£º
V
putIfAbsent(K key, V value)
Èç¹ûÖ¸¶¨¼üÒѾ²»ÔÙÓëij¸öÖµÏà¹ØÁª£¬Ôò½ ......