灝佽錛氬氨鏄妸涓浜涘睘鎬у拰鏂規硶灝佽鍒頒竴涓被閲屻?/p>
緇ф壙錛氬氨濡傚瓙綾葷戶鎵跨埗綾葷殑涓浜涘睘鎬у拰鏂規硶銆?/p>
澶氭?/strong>錛氬氨濡備竴涓埗綾繪湁澶氫釜涓嶅悓鐗硅壊鐨勫瓙綾匯?/p>
榪欓噷鎴戝氨涓嶅璁茶В錛屼笅闈㈡垜涓昏璇存槑涓涓戶鎵褲傜戶鎵挎槸OOP錛堥潰鍚戝璞★級鐨勪竴涓壒鑹詫紝java鍙敮鎸佸崟緇ф壙錛堝鏋滅戶鎵夸袱涓湁鍚屾牱鏂規硶鐨勭埗綾伙紝閭ｄ箞灝變笉鐭ラ亾緇ф壙鍒伴偅涓埗綾葷殑錛屾墍浠ava鍙敮鎸佸崟緇ф壙錛夈傜戶鎵挎槸java鐨勪竴涓壒鑹詫紝鎴戜滑鐢ㄧ殑鎵浠ョ被閮界戶鎵縊bjict綾伙紝鎵浠ュ氨瑕丱bject綾葷殑鏂規硶錛屽toString()銆乬etClass()銆亀ait()……鎵浠ユ垜浠緩绔嬬殑綾婚兘鏈夌埗綾匯?/p>
Java涓竴鑸湁涓夌綾伙細 鍩烘湰綾?/strong>:涔熷氨鏄竴鑸殑綾伙紙涓鑸墍璇寸殑綾誨氨鏄熀鏈被錛夛紝鏄璞＄殑妯℃澘錛屾槸灞炴у拰鏂規硶鐨勯泦鍚堛傚彲浠ョ戶鎵垮叾浠栧熀鏈被銆佹娊璞＄被銆佸疄鐜版帴鍙ｃ?/p>
鎶借薄綾?/strong>錛氭湁鎶借薄鏂規硶鐨勭被(鎶借薄鏂規硶灝辨槸璇ユ柟娉曞繀欏葷敱緇ф壙鏉ュ疄鐜幫紝鏈韓鍙畾涔夛紝涓嶅疄鐜?銆傛娊璞＄被鍙互鏈変竴涓垨澶氫釜鎶借薄鏂規硶錛屼粬鏄熀鏈被鍜屾帴鍙ｇ被鐨勮繃搴︺?/p>
鎺ュ彛綾?/strong>錛氫竴鑸彨鍋氭帴鍙ｏ紝璇ョ被涓殑鎵鏈夋柟娉曢兘鏄娊璞℃柟娉曪紝璇ョ被鐨勬柟娉曟湰韜彧瀹氫箟涓嶅疄鐜般?/p>
鎶借薄綾誨拰鎺ュ彛涓涓敱銆恆bstract class + 鎶借薄綾誨悕銆戜竴涓敱銆恑nterface +鎺ュ彛鍚嶃戝畾涔夛紝鎺ュ彛涓殑鎵浠ユ柟娉曢兘鏄娊璞℃柟娉曪紝鑰屾娊璞＄被鏈夐儴鍒嗘柟娉曟槸鑷韓瀹炵幇浜嗙殑錛屼竴浜涘彧瀹氫箟涓嶅疄鐜般?/p>
鍩烘湰綾葷殑瀹氫箟錛?/p>
public class Fruit { public void price() { System.out.println("姘存灉浠鋒牸"); } public void weight() { System.out.println("姘存灉閲嶉噺"); } } 鎶借薄綾葷殑瀹氫箟錛?/p>
public abstract class Fruit { public void price() { System.out.println("姘存灉浠鋒牸"); } public abstract void weight(); } 鎺ュ彛綾葷殑瀹氫箟錛?/p>
public interface Fruit { public void price(); public void weight() ; } 浠庝笂闈㈡垜浠彲浠ョ湅鍑烘帴鍙ｅ氨鏄娊璞＄被鐨勫崌綰х増錛岀敱浜庤綾葷殑鏂規硶鍏ㄦ槸鎶借薄鏂規硶錛屾墍浠ユ妸abstract鎹㈡垚interface銆傝屾帴鍙ｇ殑鏂規硶蹇呴』鐢卞瓙綾繪墠鑳藉疄鐜般?/p>
緇ф壙 緇ф壙鍩烘湰綾伙紝鍙互緇ф壙鐖剁被鐨勬柟娉曪紝涔熷彲浠ヤ粠浜涳紝涔熷彲浠ユ墿鍏呫備笅闈㈡槸瀹炵幇鎺ュ彛鍩烘湰綾葷殑綾伙細 public class Apple extends Fruit { } 璇ョ被涓氨鏈塅ruit鍩烘湰綾諱腑鐨勪袱涓柟娉曪細price()鍜寃eight()錛?/p>
緇ф壙鎶借薄綾伙紝蹇呴』瀹炵幇鎶借薄綾葷殑鎶借薄鏂規硶錛屽彲浠ヤ慨鏀圭埗綾葷殑鏂規硶錛屽拰娣誨姞鏂規硶銆備笅闈㈡槸緇ф壙鎶借薄綾葷殑綾伙細 public class Apple extends Fruit { @Override public void weight() { System.out.println("姘存灉閲嶉噺"); } } 璇ョ被緇ф壙綾籉ruit鐨刾rice()鏂規硶錛屽悓鏃跺疄鐜頒簡Fruit鎶借薄綾葷殑weight()鏂規硶銆?/p>
緇ф壙鎺ュ彛綾伙紙涔熷氨瀹炵幇鎺ュ彛錛夛紝蹇呴』瀹炵幇鎺ュ彛綾葷殑鎵鏈夌殑鎶借薄綾誨拰娣誨姞浜嗐備笅闈㈡槸緇ф壙鎺ュ彛鐨勭被錛?/p>
public class Aple implements Fruit { @Override public void price() { System.out.println("姘存灉浠鋒牸"); } @Override public void weight() { System.out.println("姘存灉閲嶉噺"); } } 璇ョ被鏄疄鐜癋ruit鎺ュ彛鐨勬墍浠ユ娊璞℃柟娉曘?/p>
Java鍙敮鎸佸崟緇ф壙錛堢戶鎵垮熀鏈被鍜屾娊璞＄被錛夛紝浣嗘槸鎴戜滑鍙互鐢ㄦ帴鍙ｆ潵瀹炵幇錛堝緇ф壙鎺ュ彛鏉ュ疄鐜幫級 濡傦細public class Apple extends Fruit implements Fruit1, Fruit2{} 涓鑸垜浠戶鎵垮熀鏈被鍜屾娊璞＄被鐢╡xtends鍏抽敭瀛楋紝瀹炵幇鎺ュ彛綾葷殑緇ф壙鐢╥mplements鍏抽敭瀛椼傚叾瀹炵戶鎵挎槸寰堢畝鍗曠殑錛屽彲浠ュ氨鏄病鏈夊紕娓呰繖涓や釜鍏抽敭瀛楋紝褰撴垜浠紕娓呮涔熷氨鏄瘮杈冪畝鍗曠殑銆?/p>
鎺ュ彛涔熷彲浠ョ戶鎵挎帴鍙ｅ錛?strong>public 榪欓噷鍙槸鑷繁鐨勭悊瑙ｏ紝鏈変簺鍦版柟鏃剁敤璇嶄笉褰撶殑錛屽彧鏄寰楄繖鏍風敤璇嶆洿濂界殑鐞嗚В錛岃澶у璋呰В銆傛湁浜涘湴鏂圭敱浜庝笉鏄繖閲岀殑閲嶇偣錛屾病鏈夎娓呮錛屽笇鏈涘ぇ瀹墮氳繃鍏朵粬鏂瑰紡浜嗚В銆?/p>
public void sort(int[] data) {
int temp;
for(int i=0;i<data.length;i++){
for(int j=data.length-1;j>i;j--){
if(data[j]<data[j-1]){
SortUtil.swap(data,j,j-1);
}
}
}
}
]]>
public void sort(int[] data) {
int temp;
for(int i=1;i<data.length;i++){
for(int j=i;(j>0)&&(data[j]<data[j-1]);j--){
SortUtil.swap(data,j,j-1);
}
}
}
}
]]>
Hql浠ｇ爜 
- String hql=”from User user ”; 銆銆
- List list=session.CreateQuery(hql).list();
鍥犱負HQL璇彞涓庢爣鍑哠QL璇彞鐩鎬技錛屾墍浠ユ垜浠篃鍙互鍦℉QL璇彞涓嬌鐢╳here瀛楀彞錛屽茍涓斿彲浠ュ湪where瀛楀彞涓嬌鐢ㄥ悇縐嶈〃杈懼紡錛屾瘮杈冩搷浣滅浠ュ強浣跨敤“and”,”or”榪炴帴涓嶅悓鐨勬煡璇㈡潯浠剁殑緇勫悎銆傜湅涓嬮潰鐨勪竴浜涚畝鍗曠殑渚嬪瓙錛?
Hql浠ｇ爜
- from User user where user.age=20;
渚嬪瓙2錛堣繑鍥炰竴涓睘鎬э級錛?
Hql浠ｇ爜
- String hql= "select c.customerNamefrom Customer c“;
- Query query= session.createQuery(hql);
- Iteratorit = query.list().iterator();
- System.out.println(query.list().size());
- while(it.hasNext()) {
- String c = (String)it.next();
- System.out.println(c);
- }
渚嬪瓙3錛堣繑鍥炲涓睘鎬э級錛?
濡傛灉榪斿洖澶氫釜灞炴э紝閭ｄ箞瀹冧滑灝嗚瑁呭叆鏁扮粍鎴栬呴泦鍚堜腑
Hql浠ｇ爜
- String hql= "select c.customerId, c.customerName“+
- “from Customer c“;
- Query query= session.createQuery(hql);
- Iteratorit = query.list().iterator();
- while(it.hasNext()) {
- Object[] obj= (Object[])it.next(); // List list= (List)it.next();
- Long id = (Long)obj[0]; //Long id = (Long)list.get(0);
- String name = (String)obj[1]; //String name = (String)list.get(1);
- System.out.println(id.longValue() + " " + name);
- }
]]>
鏂扮殑瀹炵幇寰堝鏄擄紝鍥犱負澶ч儴鍒嗘槸緇ф壙鑰屾潵鐨?
寰堝鏄撲慨鏀瑰拰鎵╁睍宸叉湁鐨勫疄鐜?
緙虹偣
鎵撶牬浜嗗皝瑁咃紝鍥犱負鍩虹被鍚戝瓙綾繪毚闇蹭簡瀹炵幇緇嗚妭
鐧界洅閲嶇敤錛屽洜涓哄熀綾葷殑鍐呴儴緇嗚妭閫氬父瀵瑰瓙綾繪槸鍙鐨?
褰撶埗綾葷殑瀹炵幇鏀瑰彉鏃跺彲鑳借鐩稿簲鐨勫瀛愮被鍋氬嚭鏀瑰彉
涓嶈兘鍦ㄨ繍琛屾椂鏀瑰彉鐢辯埗綾葷戶鎵挎潵鐨勫疄鐜?
鐢辨鍙錛岀粍鍚堟瘮緇ф壙鍏鋒湁鏇村ぇ鐨勭伒媧繪у拰鏇寸ǔ瀹氱殑緇撴瀯錛屼竴鑸儏鍐典笅搴旇浼樺厛鑰冭檻緇勫悎銆傚彧
鏈夊綋涓嬪垪鏉′歡婊¤凍鏃舵墠鑰冭檻浣跨敤緇ф壙錛?
瀛愮被鏄竴縐嶇壒孌婄殑綾誨瀷錛岃屼笉鍙槸鐖剁被鐨勪竴涓鑹?
瀛愮被鐨勫疄渚嬩笉闇瑕佸彉鎴愬彟涓涓被鐨勫璞?
瀛愮被鎵╁睍錛岃屼笉鏄鐩栨垨鑰呬嬌鐖剁被鐨勫姛鑳藉け鏁?img src ="http://m.tkk7.com/314508313/aggbug/365075.html" width = "1" height = "1" />
]]>
]]>