鈻屽杺锛佸惉璇翠綘鎯崇敤Java璋僁LL锛熷厛鍒€ョ潃鐮搁敭鐩橈紒
鏈€杩戞湁鏈嬪弸闂垜锛?鏄庢槑鐓х潃鏁欑▼鍐欑殑浠ｇ爜锛屼负鍟ヤ竴杩愯灏辨姤UnsatisfiedLinkError鍟婏紵"锛堟病閿欙紝杩欎釜绾㈣壊鎶ラ敊鎴戣浜嗕笉涓?0娆★級浠婂ぉ灏卞甫澶у鐢?涓楠?3涓伩鍧戞妧宸э紝鎶奐ava鍜孌LL鐨?璺ㄥ浗鎭?缁欐暣鏄庣櫧锛?/p>

馃洜锔?绗竴姝ワ細鐜鍑嗗锛堝埆瀚岀儲锛岃繖鏄叧閿紒锛?/h3>

浣犱互涓鸿涓狫DK灏卞畬浜嬩簡锛熸紡锛佸ぇ婕忕壒婕忥紒

1. 鈥?strong>鈥嬪繀椤昏鈥?/strong>鈥嬶細VS2019浠ヤ笂鐗堟湰锛堝埆闂负鍟ヤ笉鐢╒S Code锛屽緟浼氫綘灏辨噦锛?/li>
2. 鈥?strong>鈥嬫鏌ATH鈥?/strong>鈥嬶細鎶?code>jni.h鎵€鍦ㄧ殑include璺緞濉炶繘鐜鍙橀噺锛堜竴鑸湪JDK瀹夎璺緞鐨刬nclude鐩綍锛?/li>
3. 鈥?strong>鈥嬬绉樺伐鍏封€?/strong>鈥嬶細javah鍛戒护铏界劧琚純鐢ㄤ簡锛屼絾鑰侀」鐩繕鍦ㄧ敤鎬庝箞鍔烇紵璇曡瘯javac -h鐢熸垚澶存枃浠?/li>

鎴戝綋骞村湪杩欐鍗′簡3澶╋紒鍚庢潵鍙戠幇鏄€?strong>鈥媁indows SDK鐗堟湰娌¤鍏ㄢ€?/strong>鈥嬶紝姘斿緱鎶婂挅鍟℃臣閿洏涓婁簡...

---

馃摑 绗簩姝ワ細缂栧啓C++浠ｇ爜锛堟墜鎶婃墜鏁欏鐗堬級

鍜变滑鍏堟潵涓狧ello World绾у埆鐨勪緥瀛愶細

cpp澶嶅埗
#include 
extern "C" JNIEXPORT jstring JNICALL 
Java_com_example_Demo_hello(JNIEnv* env, jobject obj) {
    return env->NewStringUTF("鏉ヨ嚜DLL鐨勯棶鍊欙紒");
}

鈥?strong>鈥嬮噸鐐规敞鎰忊€?/strong>鈥嬶細
馃敟 鏂规硶鍛藉悕蹇呴』鐢?code>Java_鍖呭悕_绫诲悕_鏂规硶鍚?/code>鐨勬牸寮忥紙灏卞儚蹇€掑湴鍧€蹇呴』绮剧‘鍒伴棬鐗屽彿锛?br/> 馃挕 鐢?code>extern "C"闃叉C++缂栬瘧鍣ㄦ悶涔卞嚱鏁板悕锛堣鐧戒簡灏辨槸缁欏嚱鏁板悕"涓婃埛鍙?锛?/p>

鈿?绗笁姝ワ細鐢熸垚DLL鏂囦欢锛堣翰寮€3澶у潙锛?/h3>

鎿嶄綔姝ラ	鏂版墜甯哥姱閿欒	姝ｇ‘濮垮娍
缂栬瘧璁剧疆	閫夐敊骞冲彴锛坸86 vs x64锛?/td>	鍙抽敭椤圭洰鈫掑睘鎬р啋鐩爣骞冲彴鈫掑拰浣犵殑JVM淇濇寔涓€鑷?/td>
瀵煎嚭绗﹀彿	蹇樿__declspec(dllexport)	鍦ㄥ嚱鏁板０鏄庡墠鍔?code>JNIEXPORT
杩愯鏃?/td>	DLL渚濊禆椤圭己澶?/td>	鐢―ependency Walker鏌ョ己鐨刣ll

鍘诲勾甯寮熻皟璇曟椂鍙戠幇锛屼粬灞呯劧鎶奃ebug鐗圖LL鏀惧埌鐢熶骇鐜锛岀粨鏋滄€ц兘鐩存帴鎺夊埌浜插閮戒笉璁よ瘑锛?/p>

---

馃悶 绗洓姝ワ細Java璋冪敤锛堥檮璧犳帓閿欐寚鍗楋級

java澶嶅埗
public class Demo {
    static {
        try {
            System.load("C:/demo.dll"); //缁濆璺緞鏇撮潬璋?/span>
        } catch (UnsatisfiedLinkError e) {
            System.err.println("鈿狅笍 妫€鏌ヨ繖涓夌偣锛歕n1.DLL浣嶆暟瀵逛笉瀵筡n2.璺緞鏈夋病鏈変腑鏂嘰n3.渚濊禆閾炬槸鍚﹀畬鏁?);
        }
    }
    
    public native String hello();
}

鈥?strong>鈥嬪父瑙佹姤閿欏ぇ鍏ㄢ€?/strong>鈥嬶細

1. NoSuchMethodError 鈫?鍏垚鏄柟娉曠鍚嶅涓嶄笂锛堢敤javap -s鏌ュ疄闄呯鍚嶏級
2. AccessViolationException 鈫?澶氬崐鏄唴瀛樻搷浣滆秺鐣岋紙C++閭ｈ竟鎸囬拡鐜╄劚浜嗭級
3. JNI_CreateJavaVM failed 鈫?JDK鍜孌LL鐨勪綅鏁板繀椤讳竴鑷达紒

馃И 绗簲姝ワ細鍙傛暟浼犻€掞紙闄勮禒绫诲瀷瀵圭収琛級

Java鍜孋++鐨勭被鍨嬭浆鎹㈠氨鍍忚皥鎭嬬埍鈥斺€斿緱浜掔浉杩佸氨锛?/p>

鈥?strong>鈥嬭娉粡楠屸€?/strong>鈥嬶細
澶勭悊鏁扮粍鏃朵竴瀹氳鐢?code>GetArrayElements鍜?code>ReleaseArrayElements锛屽惁鍒欏垎鍒嗛挓鍐呭瓨娉勬紡锛佷箣鍓嶆湁涓」鐩洜姝OM锛堝唴瀛樻孩鍑猴級锛屽噷鏅?鐐硅鎶ヨ鐭俊鍚甸啋...

馃挕 鐙瑙佽В锛欽NI鐢ㄤ笉鐢紵浠€涔堟椂鍊欑敤锛?/h3>

鏍规嵁鎴戝弬涓庣殑7涓法璇█椤圭洰缁忛獙锛?/p>

• 闇€瑕侀珮鎬ц兘璁＄畻锛堝鍥惧儚澶勭悊锛夆啋 鏋滄柇涓奐NI
• 绠€鍗旳PI璋冪敤 鈫?璇曡瘯JNA锛堣櫧鐒舵參浣嗙渷浜嬶級
• 瑕佽法骞冲彴 鈫?浼樺厛鑰冭檻SWIG鐢熸垚缁戝畾浠ｇ爜

鏈€杩戝彂鐜颁釜楠氭搷浣滐細鐢℅raalVM鐩存帴鎶奀++浠ｇ爜缂栬瘧鎴恘ative image锛屾€ц兘鎻愬崌40%锛佷笉杩囬厤缃繃绋嬪牚姣旀嫾涔愰珮鍗冨勾闅?..

---

鈻屾渶鍚庤鍙ユ帍蹇冪獫鐨勮瘽锛?br/> 鍒缃戜笂閭ｄ簺"5鍒嗛挓鎼炲畾"鐨勬暀绋嬪拷鎮犱簡锛佹垜瑙佽繃鏈€绂昏氨鐨刡ug鏄湁浜烘妸DLL鏀惧湪C:\Windows\System32锛岀粨鏋滆瀹夊叏杞欢褰撶梾姣掑垹浜?..锛堝埆绗戯紒杩欎簨鐪熺殑鍙戠敓杩囷紒锛夐亣鍒伴棶棰樺厛娣卞懠鍚革紝鎸夎繖浜旀璧帮紝淇濆噯浣犺兘鍜孌LL鎴愬姛"鐗垫墜"锛?/p>

本文由嘻道妙招独家原创，未经允许，严禁转载