姒傝堪锛氭湰绡?strong>Java鍒涗笟瀛︿範瀹炴垬鎸囧崡灏嗗紩棰嗕綘浠庨浂寮€濮嬶紝閫愭娣卞叆鍩虹锛屾帉鎻￠潰鍚戝璞＄紪绋嬩笌Web寮€鍙戠殑鏍稿績鎶€鑳姐€傛枃绔犲皢璇︾粏浠嬬粛Java鍏ラ棬鐭ヨ瘑銆佸璞＄紪绋嬫蹇点€佹暟缁勪笌闆嗗悎鎿嶄綔銆佸紓甯稿鐞嗕互鍙婃枃浠舵搷浣滅瓑鍐呭锛屽苟涓斾細浠嬬粛Java Web鍩虹涓嶮VC鏋舵瀯鐨勭悊瑙ｃ€傞€氳繃瀹炴垬椤圭洰鍜屽垱涓氬噯澶囷紝甯姪浣犲浼氬皢鐞嗚鐭ヨ瘑搴旂敤浜庡疄闄呴」鐩腑锛屽疄鐜颁粠姒傚康鍒板疄鏂界殑鍏ㄩ潰鍩瑰吇锛屼负Java鎶€鏈湪鍒涗笟椤圭洰涓殑搴旂敤濂犲畾鍧氬疄鍩虹銆?/p>

鍏ラ棬鍩虹鐭ヨ瘑锛欽ava鐨勮捣鐐?/strong>

Java鏄竴闂ㄥ箍娉涘簲鐢ㄤ簬浼佷笟绾у簲鐢ㄥ拰浜掕仈缃戝紑鍙戠殑楂樼骇缂栫▼璇█锛屼互鍏堕潰鍚戝璞＄紪绋嬩负鏍稿績锛屾敮鎸佽法骞冲彴杩愯銆傝寮€濮婮ava缂栫▼涔嬫梾锛岄鍏堥渶瑕佸畨瑁匤ava寮€鍙戝伐鍏峰寘锛圝DK锛夈€?/p>

鍦∣racle瀹樼綉涓嬭浇JDK骞惰В鍘嬪埌鏄撲簬璁块棶鐨勭洰褰曪紝渚嬪C:\Program Files\Java銆傛帴鐫€閰嶇疆鐜鍙橀噺锛岃缃甁AVA_HOME鎸囧悜JDK瀹夎鐩綍锛屽苟灏?JAVA_HOME%\bin娣诲姞鍒癙ath鍙橀噺涓€傛渶鍚庨€氳繃鍛戒护绐楀彛鎵ц鍛戒护楠岃瘉JDK瀹夎鐘舵€併€?/p>浜屻€佸彉閲忋€佹暟鎹被鍨嬩笌杩愮畻绗﹀熀纭€

鍦↗ava涓紝鍙橀噺鐢ㄤ簬瀛樺偍鏁版嵁锛岃€屾暟鎹被鍨嬪畾涔変簡鍙橀噺鍙互瀛樺偍鐨勫€肩殑绫诲瀷銆備互涓嬫槸鍏充簬鍙橀噺瀹氫箟銆佹暟鎹被鍨嬪強杩愮畻绗︾殑鍩虹浠嬬粛銆?/p>

渚嬪锛屽湪public class Main鐨刴ain鏂规硶涓紝鎴戜滑鍙互瀹氫箟涓嶅悓绫诲瀷鐨勫彉閲忓苟璧嬩簣鍒濆€笺€傚涓嬶細

public class Main {

public static void main(String[] args) {

// 瀹氫箟鏁村瀷鍙橀噺

int age = 25;

// 瀹氫箟娴偣鍨嬪彉閲?/p>

double weight = 68.5;

// 瀹氫箟瀛楃涓插彉閲?/p>

String name = "John Doe";

// 澶氬彉閲忓０鏄?/p>

int x; int y = 10;

System.out.println("Age: " + age);

System.out.println("Weight: " + weight);

System.out.println("Name: " + name);

System.out.println("x: " + x + ", y: " + y);

}

}

閫氳繃杩欐浠ｇ爜锛屼綘鍙互浜嗚В濡備綍瀹氫箟鍙橀噺骞惰緭鍑哄畠浠殑鍊笺€傝繕鏈夋洿澶氬叧浜庤繍绠楃鍜岃〃杈惧紡鐨勫涔犵瓑寰呬綘鍘绘帰绱€?/p>

鏉′欢鍒ゆ柇锛坕f-else锛?/p>

鍦ㄧ紪绋嬬殑涓栫晫閲岋紝鎴戜滑缁忓父浼氶亣鍒伴渶瑕佹牴鎹笉鍚屾潯浠舵墽琛屼笉鍚屾搷浣滅殑鎯呭喌銆備笅闈㈡槸涓€涓畝鍗曠殑Java绋嬪簭锛屽睍绀轰簡濡備綍浣跨敤if-else璇彞杩涜鏉′欢鍒ゆ柇銆?/p>

```java

public class ConditionalDemo {

public static void main(String[] args) {

int number = 42;

if (number > 0) {

System.out.println("鏁板瓧鏄鏁般€?);

} else if (number < 0) {

System.out.println("鏁板瓧鏄礋鏁般€?);

} else {

System.out.println("鏁板瓧鏄浂銆?);

}

}

}

```

寰幆锛坒or锛寃hile锛宒o-while锛?/p>

鍦ㄧ紪绋嬩腑锛屾垜浠粡甯搁渶瑕侀噸澶嶆墽琛屾煇浜涙搷浣溿€傝繖鏃讹紝灏卞彲浠ヤ娇鐢ㄥ惊鐜粨鏋勩€備笅闈㈡槸涓€涓狫ava绋嬪簭锛屽睍绀轰簡涓夌寰幆鏂瑰紡锛歠or寰幆銆亀hile寰幆鍜宒o-while寰幆銆?/p>

```java

public class LoopDemo {

public static void main(String[] args) {

// for寰幆绀轰緥

for (int i = 1; i <= 5; i++) {

System.out.println("For寰幆杩唬锛? + i);

}

// while寰幆绀轰緥

int j = 1;

while (j <= 5) { // 褰搄灏忎簬鎴栫瓑浜?鏃讹紝鎵ц寰幆浣撲腑鐨勪唬鐮侊紝姣忔寰幆缁撴潫鍚巎鑷1銆?/p>

鏁扮粍鎿嶄綔涔嬫梾

ArrayDemo 绫绘彮绀?/p>

鍦ㄧ紪绋嬬殑涓栫晫閲岋紝鏁扮粍鏄瓨鍌ㄥ涓浉鍚岀被鍨嬪厓绱犵殑缁撴瀯銆傝鎴戜滑閫氳繃涓€涓畝鍗曠殑 `ArrayDemo` 绫绘潵鎺㈢储鍏跺熀鏈搷浣溿€?/p>

```java

public class ArrayDemo {

public static void main(String[] args) {

int[] numbers = {1, 2, 3, 4, 5};

System.out.println("鏁扮粍鍏冪礌锛?);

for (int num : numbers) {

System.out.print(num + " ");

}

System.out.println("鏁扮粍闀垮害锛?" + numbers.length);

// 鍙橀潻涔嬫槦锛氫慨鏀规暟缁勫厓绱?/p>

numbers[0] = 100;

System.out.println("淇敼鍚庣殑鏁扮粍鍏冪礌锛?);

for (int num : numbers) {

System.out.print(num + " ");

}

}

}

```

闆嗗悎鎿嶄綔鐨勯瓍鍔?/p>

浣跨敤 `ArrayList`锛屾垜浠彲浠ュ姩鎬佸湴瀛樺偍鍜屾搷浣滄暟鎹€備笅闈㈢殑 `CollectionDemo` 绫诲睍绀轰簡濡備綍浣跨敤瀹冦€?/p>

```java

import java.util.ArrayList;

public class CollectionDemo {

public static void main(String[] args) {

ArrayList friends = new ArrayList<>();

friends.add("Alice");

friends.add("Bob");

friends.add("Charlie");

// 閬嶅巻闆嗗悎锛氭垜鐨勬湅鍙嬪湀

for (String friend : friends) {

System.out.println("鎴戠殑鏈嬪弸锛?" + friend);

}

// 鏂版湅鍙嬪姞鍏?/p>

friends.add("David");

System.out.println("鏇存柊鍚庣殑鏈嬪弸鍒楄〃澶у皬锛?" + friends.size());

}

}

```

寮傚父澶勭悊鏈哄埗锛氱▼搴忕殑瀹堟姢鑰?/p>

鍦ㄧ▼搴忎腑锛屽紓甯稿鐞嗘槸纭繚绋冲畾杩愯鐨勫叧閿€俙ExceptionHandling` 绫诲睍绀轰簡濡備綍鎹曡幏鍜屽鐞嗗紓甯搞€?/p>

```java

public class ExceptionHandling {

public static void main(String[] args) {

try {

// 灏濊瘯涓€涓彲鑳藉鑷村紓甯哥殑鎿嶄綔锛氶櫎浠ラ浂

int result = divide(10, 0);

System.out.println("缁撴灉锛?" + result);

} catch (ArithmeticException e) {

// 褰撳嚭鐜板紓甯告椂锛岃緭鍑洪敊璇俊鎭?/p>

System.out.println("閿欒锛氫笉鍏佽闄や互闆躲€?);

}

}

public static int divide(int a, int b) {

return a / b; // 杩欓噷鍙兘鎶涘嚭 ArithmeticException 寮傚父

}

}

```

鏂囦欢杈撳叆杈撳嚭鎿嶄綔锛氫笌澶栭儴涓栫晫鐨勪氦浜?/p>

```java

import java.io.;

public class FileManipulation {

public static void main(String[] args) {

try (BufferedReader reader = new BufferedReader(new FileReader("data.txt"))) {

String line;

while ((line = reader.readLine()) != null) {

System.out.println("浠庢枃浠朵腑璇诲彇鐨勫唴瀹? " + line);

}

} catch (IOException e) {

System.out.println("璇诲彇鏂囦欢鏃跺彂鐢熼敊璇€?);

}

try (BufferedWriter writer = new BufferedWriter(new FileWriter("data.txt"))) {

writer.write("浣犲ソ锛屼笘鐣岋紒");

writer.newLine(); // 鏂板涓€琛屽垎闅旂浠ュ垎闅斾袱娈靛唴瀹?/p>

writer.write("杩欐槸鏂扮殑涓€琛屽唴瀹广€?); // 鍐欏叆浜嗘柊鐨勫唴瀹瑰埌鏂囦欢涓?/p>

} catch (IOException e) {

System.out.println("鍐欏叆鏂囦欢鏃跺彂鐢熼敊璇€?);

}

}

}

--- 鍒嗗壊绾?--- 浠ヤ笅鏄叧浜嶹eb寮€鍙戝熀纭€鐨勫唴瀹?---

Web寮€鍙戝熀纭€锛氭彮寮€Java Web鐨勭绉橀潰绾?馃暩锔?馃捇 馃殌 馃敟 馃寪 馃摎 馃摉 馃幆鉁?锛堟湰绔犺妭鐫€閲嶈瑙ava Web鐨勫熀纭€鐭ヨ瘑锛?鉁煄湪 馃専鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁ㄢ湪鉁?/p>

MVC绀轰緥

Model

User绫?/p>

璁炬兂涓€涓敤鎴锋ā鍨嬶紝瀹冨寘鍚鍚嶅拰鐢靛瓙閭欢涓や釜绉佹湁瀛楁銆傞€氳繃鏋勯€犲嚱鏁帮紝鎴戜滑鍙互杞绘澗鍦颁负姣忎釜鐢ㄦ埛璁剧疆杩欎袱涓睘鎬с€備娇鐢?getter 鏂规硶锛屾垜浠彲浠ヨ幏鍙栫敤鎴风殑濮撳悕鍜岀數瀛愰偖浠朵俊鎭€?/p>

Controller

UserController绫?/p>

鍦ㄦ帶鍒跺櫒灞傞潰锛屾垜浠湁涓€涓鐞嗙敤鎴疯姹傜殑鏂规硶銆傚綋鎺ユ敹鍒颁竴涓猆ser瀵硅薄鏃讹紝瀹冭繑鍥炰竴涓畝鍗曠殑娆㈣繋娑堟伅锛屽熀浜庣敤鎴风殑濮撳悕銆?/p>

View

HTMLView绫?/p>

瑙嗗浘灞傝礋璐ｇ敓鎴愮敤鎴风晫闈€傝繖閲岋紝涓€涓畝鍗曠殑`generateView`鏂规硶鎺ユ敹涓€涓秷鎭紝骞跺皢鍏跺祵鍏ュ埌HTML涓婁笅鏂囦腑锛屼负鏈€缁堢敤鎴峰睍绀恒€?/p>

---椤圭洰瀹炴垬锛氫粠姒傚康鍒板疄鏂芥帰绱箣鏃呪€?/p>

閫夋嫨椤圭洰杩涜璁捐涓庡紑鍙?/p>

韪忎笂浣犵殑杞欢寮€鍙戜箣鏃呯殑绗竴姝ユ槸閫夋嫨涓€涓悎閫傜殑椤圭洰銆傝鎯充竴涓畝鍗曠殑鍗氬绯荤粺浣滀负璧风偣銆傞鍏堣繘琛岄渶姹傚垎鏋愶紝鏄庣‘椤圭洰鐨勬柟鍚戝拰鐩爣銆傛帴鐫€璁捐绯荤粺鐨勬灦鏋勶紝鎸夌収璁捐钃濆浘閫愭缂栫爜瀹炵幇銆?/p>

绯荤粺鍒嗘瀽涓庤璁℃敾鐣?/p>

馃攳 闇€姹傚垎鏋愶細鏄庣‘椤圭洰鐨勫姛鑳介渶姹傘€佹€ц兘瑕佹眰浠ュ強瀹夊叏鎬ц€冮噺绛夈€?/p>

馃搻 璁捐锛氱簿蹇冪粯鍒剁郴缁熸灦鏋勮摑鍥俱€佽璁℃暟鎹簱缁撴瀯浠ュ強椤甸潰鐨勫竷灞€绛夌粏鑺傘€?/p>

瀹炵幇杩囩▼鎻

馃捇 缂栧啓浠ｇ爜锛氳繍鐢ㄤ綘鐨勭紪绋嬬煡璇嗗疄鐜伴」鐩姛鑳斤紝濡傜敤鎴风櫥褰曘€佹敞鍐屻€佸崥瀹㈡枃绔犲彂甯冨拰璇勮绛夋牳蹇冨姛鑳姐€?/p>

馃敩 娴嬭瘯锛氱‘淇濊蒋浠惰川閲忔槸涓嶅彲鎴栫己鐨勭幆鑺傘€傝繘琛屽崟鍏冩祴璇曘€侀泦鎴愭祴璇曞拰绯荤粺娴嬭瘯锛岀‘淇濊蒋浠舵棤鎳堝彲鍑汇€?/p>

椤圭洰閮ㄧ讲涓庡彂甯冩寚鍗?/p>

馃彴 閫夋嫨鍚堥€傜殑鏈嶅姟鍣ㄧ幆澧冿紝濡侫pache鏈嶅姟鍣ㄥ拰MySQL鏁版嵁搴撶瓑銆傞厤缃甒eb搴旂敤锛屽畬鎴愰儴缃叉祦绋嬶紝骞跺皢椤圭洰鍙戝竷鍒版祴璇曟垨鐢熶骇鐜銆?/p>

---鍒涗笟鍑嗗鎸囧崡锛氬競鍦鸿皟鐮斾笌鎶€鏈矾绾胯鍒掆€?/p>

甯傚満璋冪爺涓庡垎鏋愭繁搴︽礊瀵?/p>

浜嗚В浣犵殑鐩爣甯傚満銆佺珵浜夊鎵嬩互鍙婄敤鎴烽渶姹傘€傝繘琛岃缁嗙殑甯傚満鍒嗘瀽锛屽寘鎷琒WOT鍒嗘瀽锛屼负浣犵殑浜у搧绛栫暐鎻愪緵鍧氬疄鐨勪緷鎹€?/p>

浜у搧涓庢妧鏈矾绾胯鍒掕摑鍥?/p>

鍩轰簬甯傚満璋冪爺缁撴灉锛岃鍒掍骇鍝佸姛鑳姐€侀€夋嫨鍚堥€傜殑鎶€鏈爤浠ュ強璁惧畾寮€鍙戝懆鏈熺瓑鍏抽敭鍐崇瓥銆?/p>

Java鎶€鏈湪鍒涗笟椤圭洰涓殑瀹炴垬涓庝紭鍖栫瓥鐣?/p>

鍦ㄥ垱涓氱幆澧冧腑锛屾瀯寤轰竴涓珮鏁堛€佺伒娲荤殑鏋舵瀯鑷冲叧閲嶈銆傚疄鏂芥寔缁泦鎴愬拰鎸佺画閮ㄧ讲娴佺▼锛岀‘淇濋」鐩『鍒╄繘琛屻€侸ava鐨勪赴瀵孉PI鍜屾鏋朵负Web寮€鍙戝拰浼佷笟绾у簲鐢ㄦ彁渚涗簡寮哄ぇ鐨勬敮鎸併€?/p>

缁撹鍥為【涓庡惎绀哄綍

Java浣滀负涓€闂ㄥ己澶х殑缂栫▼璇█锛屽湪Web寮€鍙戝拰浼佷笟绾у簲鐢ㄤ腑鍗犳嵁閲嶈鍦颁綅銆傞€氳繃娣卞叆浜嗚В闈㈠悜瀵硅薄缂栫▼銆乄eb寮€鍙戝拰椤圭洰瀹炴柦锛岀粨鍚堝競鍦鸿皟鐮斾笌鎶€鏈鍒掞紝涓哄垱涓氶」鐩腑鐨凧ava鎶€鏈簲鐢ㄥ瀹氬潥瀹炲熀纭€銆備笉鏂疄璺点€佸涔犲拰浼樺寲锛屼綘灏嗕笉鏂墠琛屽湪Java寮€鍙戠殑鏃呯▼涓€?/p>