1 / 11 Apache ጱం० commons-pool Email:suhuanzheng7784877@163.com 1. ¡ ¢ £ ¤ ¥ ¦ § ¨ © ¥ ¥ ! §" # $ % & ¥ ¦ § ¨ ' () * + , ! § - ./ 0 1 2 3 0 + 4 5¦ § ¥ 67 - 1 89 :;< = > + ¥ ?@ A = > B C ¥ C D 3 'E F - OK G !H 1 § I J synchronized K § ThreadLoacl L MN O P ¥ Q R 0S T P Q ¥ 3 0U VW X ¥ - YZ [ ¥ ¥4 \ 7 4 ] ^ _ ` § a ¥ _ b c P 4 Q ¥ S d e f g 3 0 h i § ¥ - 2. j ¢ k 1 0l m ) ¥ no p q r ¥ - q r ¥ 0 s t 0 - u v . C D w ll s t 0 j - x 9 £ ¤ 6 Web yz ¥ DAO{ | } ~ . 1 EJB ¥ EAO ' 0 ` § T
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commons-collections - m ¼ \ U V G a jar I ¢ < classpath - x ¥ v w 9A /ApacheCommonPool/lib/commons-collections-2.1.1.jar /ApacheCommonPool/lib/commons-pool-1.5.6-javadoc.jar /ApacheCommonPool/lib/commons-pool-1.5.6-sources.jar /ApacheCommonPool/lib/commons-pool-1.5.6.jar " ¥ q r v w ¢ x 6. ! § # ^ ² a ¡ ^ ¨ £ ¤ A Java § ¦ 3 0 Î § ¥ j String ¥ q r - ó A ¹ õ ¥ e Û ¥ q r - ó l | ~ String 0 1 o p 6 q r ¥ y w java.lang.String ' 1 0 s t , r String 3 1 § ¢ 8 s t @ A © ¢ ¥ 8 ^  Q E ¥ = Z JVM ¢ String 6 q r K - ) String q S d ¢ © ¥ § o - ² a ! § String Ê Ê 0 9 Ç! § q r - ef ¦ § ¨ 1 V q r String - ö ' ) | 1 - y w I E " ¥ POJO e Û ÌÍ - package key; public class Person { String id ; String name ; 4 / 11 public Person() { } public Person(String id, String name) { this .id = id; this .name = name; } public String getId() { return id ; } public void setId(String id) { this .id = id; } public String getName() { return name ; } public void setName(String name) { this .name = name; } @Override public String toString() { return "id:" + id + "---name:" + name ; } } . §é POJO¡ Ë " ' ( ) id P name ¢ - A § 0 ! § q s £ ß K ^ ¤ /** * ¥ ¦ § ¨ * @author liuyan */ class KeyedPoolableObjectFactorySample extends BaseKeyedPoolableObjectFactory { 5 / 11 /** * © ª « ¬ ® */ @SuppressWarnings ("unchecked" ) public Object makeObject(Object clsName) throws Exception { if (clsName == null || !(clsName instanceof String) || "".equals(clsName)) { throw new RuntimeException( " ¯ ° ±² ³ "); } System. out .println( " ©ª ´ µ ¶ · « ¬ :" + clsName); Class cls = Class. forName ((String) clsName); Object obj = cls.newInstance(); return obj; } @Override public void activateObject(Object key, Object obj) throws Exception { // TODO Auto-generated method stub super .activateObject(key, obj); System. out .println( "¸ ¹ « ¬ "); } @Override public void destroyObject(Object key, Object obj) throws Exception { // TODO Auto-generated method stub super .destroyObject(key, obj); System. out .println( "º » « ¬ "); } @Override public void passivateObject(Object key, Object obj) throws Exception { // TODO Auto-generated method stub super .passivateObject(key, obj); 6 / 11 System. out .println( "¼ ½ « ¬ "); } @Override public boolean validateObject(Object key, Object obj) { // TODO Auto-generated method stub System. out .println( "¾ ¿ « ¬ "); return super .validateObject(key, obj); } } q s £ ' ¦ 0 S T ¥ ` ß K i U V © À ¥ ' ` § makeObject() \ 7 Á ¥ \ 7 ¢ ² ^ ¤ ¨ LM l -  V ' 0 à » \ 7 validateObject 0 à » 0 ö ¢Ä ² ¬ § ¥ - ² a ¡ ^ ¨ ^ § ÅÆÇ í È LM e #r - A § 0 ! § ^ ¤ /** * ÉÊ * @author liuyan * */ public class KeyedObjectPoolSample { /** * @param args */ public static void main(String[] args) { Object obj = null ; KeyedPoolableObjectFactory factory = new KeyedPoolableObjectFactorySample(); KeyedObjectPoolFactory poolFactory = new StackKeyedObjectPoolFactory( factory); 7 / 11 KeyedObjectPool pool = poolFactory.createPool(); String key = null ; try { key = "java.lang.String" ; obj = pool.borrowObject(key); obj = "obj1" ; // pool.returnObject(key, obj ); obj = pool.borrowObject(key); pool.returnObject(key, obj); obj = pool.borrowObject(key); System. out .println(obj); System. out .println( "============ ËÌ ´ µ« ¬ Person=============" ); key = "key.Person" ; Person person1 = (Person) pool.borrowObject(key); person1.setId( "1" ); person1.setName( " Í ÎÏ "); System. out .println(person1); pool.returnObject(key, person1); System. out .println(person1); Person person2 = (Person) pool.borrowObject(key); person2.setId( "2" ); person2.setName( " Ð ÑÒ "); Person person3 = (Person) pool.borrowObject(key); person3.setId( "3" ); person3.setName( " ´ ÓÔ "); Person person4 = (Person) pool.borrowObject(key); person4.setId( "4" ); 8 / 11 person4.setName( " Õ Ö × "); System. out .println(person1); System. out .println(person2); System. out .println(person3); System. out .println(person4); pool.returnObject(key, person3); Person person5 = (Person) pool.borrowObject(key); System. out .println(person5); } catch (Exception e) { e.printStackTrace(); } finally { try { pool.close(); System. out .println(pool); } catch (Exception e) { e.printStackTrace(); } } } } y ww â § o “obj1” - Æ ù z q ¨ [ E obj æ ¨ . [ E ¥ Ø q ¨ ) ¬ § ¥ ûÆ I = 9 : ) ` § makeObject() Ù À ¥ E I obj § - § ` § returnObject \ 7 G \ I q - À ¤ ó & A § ! § Person w z q ¨ [ Person person1 - ¢ k q § F ² \ ) Ú Ç Person - q ¨ Ûo \ I q - . q ¨ ' ) % ! § 8 ¥ = Z ¢ ¢ > Q P ¥ - A § person2 P ¨ q [ Person a q ¢ ) ¬ § ¥ - ½ t 1 ` § makeObject \ 7 û Æ G ) ¥ Ü u I k é ñ G ¬- k Û o - Ý ÞÞ ¥ 1 ß \ B 2 à á ½ t . Þ ¥ person1 3 0 2 à á person1 ¥ § æ â P ÊÊ 0 9 / 11 § ¥ ½ ã ä å ¥ o > Q P r - = \ L . Ü \ I q ¿ person3 P ' ¨ q V q l ~ 0 LL £ I 6 make h < = ¾ ` § markObject \ 7 © À ¥ - . À ¥ ' 0 3 æ - A ¥ 4 çè 3 0 À ¥ - ¢ é M < pool.returnObject(key, person3); Person person5 = (Person) pool.borrowObject(key); System. out .println(person5); > F person5 0 ÞÞ ê \ ¥ §
3 æ - é M ë í ì 9A ©ª ´ µ ¶ · « ¬ :java.lang.String ¸ ¹ « ¬ ¾ ¿ « ¬ ©ª ´ µ ¶ · « ¬ :java.lang.String ¸ ¹ « ¬ ¾ ¿ « ¬ ¾ ¿ « ¬ ¼ ½ « ¬ ¸ ¹ « ¬ ¾ ¿ « ¬ ~~~ ============ ËÌ ´ µ « ¬ Person============= ©ª ´ µ ¶ · « ¬ :key.Person ¸ ¹ « ¬ ¾ ¿ « ¬ id:1---name: Í ÎÏ 10 / 11 ¾ ¿ « ¬ ¼ ½ « ¬ id:1---name: Í ÎÏ ¸ ¹ « ¬ ¾ ¿ « ¬ ©ª ´ µ ¶ · « ¬ :key.Person ¸ ¹ « ¬ ¾ ¿ « ¬ ©ª ´ µ ¶ · « ¬ :key.Person ¸ ¹ « ¬ ¾ ¿ « ¬ id:2---name: Ð ÑÒ id:2---name: Ð ÑÒ id:3---name: ´ ÓÔ id:4---name: Õ Ö × ¾ ¿ « ¬ ¼ ½ « ¬ ¸ ¹ « ¬ ¾ ¿ « ¬ id:3---name: ´ ÓÔ org.apache.commons.pool.impl.StackKeyedObjectPool contains 0 distinct pools: ¢ 8 . # £ ¤ \ ¦ í î ï e ' 0 ¦ . ¬ bc P BC { get Ûo { set 11 / 11 ¥ 3 1 o p q r - ð j § 8 ./ ¥ e f g ñ A ð j § 8 ¥ ò ó - . / þ e ô Ù bc P § õ ô 1 ö ¥ ] ^ N O C D- ¦ í 0 ÷ ÊÊ ý * ¥ \ 7 = Z 1 Ú ø BC bc P ¥ = Z © W X ¥ o p q r - < Ò 0 q r \ 0 " # . ¢ k ) ¥ v ® © & H ¥ e f yz U V . / 6 ù p K -