{"id":146,"date":"2009-05-09T10:57:32","date_gmt":"2009-05-09T02:57:32","guid":{"rendered":"http:\/\/percy.blog.ubuntu.org.cn\/?p=146"},"modified":"2009-05-09T10:57:32","modified_gmt":"2009-05-09T02:57:32","slug":"%e5%9c%a8linux%e5%b9%b3%e5%8f%b0%e4%b8%8b%e4%bd%bf%e7%94%a8jni%e8%bd%ac","status":"publish","type":"post","link":"https:\/\/pjq.me\/?p=146","title":{"rendered":"\u5728Linux\u5e73\u53f0\u4e0b\u4f7f\u7528JNI(\u8f6c)"},"content":{"rendered":"<div class=\"postbody\">From:http:\/\/www.ibm.com\/developerworks\/cn\/java\/l-linux-jni\/<br \/>\n\u5728Linux\u5e73\u53f0\u4e0b\u4f7f\u7528JNI<br \/>\n\u7ea7\u522b\uff1a \u521d\u7ea7<\/p>\n<p>\u5f20\u7ffc\u7fd4 \u674e\u5e86\u660e,<\/p>\n<p>2002 \u5e74 10 \u6708 29 \u65e5<\/p>\n<p>\u672c\u6587\u7b80\u8981\u4ecb\u7ecd\u4e86JNI\u8c03\u7528\u89c4\u8303\uff0c\u53ca\u5e38\u7528\u51fd\u6570\u3002\u5e76\u901a\u8fc7\u5177\u4f53\u793a\u4f8b\u7a0b\u5e8f\u5c55\u793a\u4e86\u5b9e\u73b0\u4e00\u4e2a\u672c\u5730\u8c03\u7528\u7684\u57fa\u672c\u6b65\u9aa4\u3002<\/p>\n<p>\u5f15\u8a00<\/p>\n<p>Java \u7684\u51fa\u73b0\u7ed9\u5927\u5bb6\u5f00\u53d1\u5e26\u6765\u7684\u6781\u5927\u7684\u65b9\u4fbf\u3002\u4f46\u662f\uff0c\u5982\u679c\u6211\u4eec\u6709\u5927\u91cf\u539f\u6709\u7684\u7ecf\u8fc7\u5e7f\u6cdb\u6d4b\u8bd5\u7684\u975eJava\u4ee3\u7801\uff0c\u5c06\u5b83\u4eec\u5168\u90e8\u7528Java\u6765\u91cd\u5199\uff0c\u6050\u6015\u4f1a\u5e26\u6765\u5de8\u5927\u7684\u5de5\u4f5c\u91cf\u548c\u957f \u671f\u7684\u6d4b\u8bd5\uff1b\u5982\u679c\u6211\u4eec\u7684\u5e94\u7528\u4e2d\u9700\u8981\u8bbf\u95ee\u5230\u7279\u5b9a\u7684\u8bbe\u5907\uff0c\u751a\u81f3\u662f\u4ec5\u7b26\u5408\u516c\u53f8\u5185\u90e8\u4fe1\u606f\u4ea4\u4e92\u89c4\u8303\u7684\u8bbe\u5907\uff0c\u6216\u67d0\u4e2a\u7279\u5b9a\u7684\u64cd\u4f5c\u7cfb\u7edf\u624d\u6709\u7684\u7279\u6027\uff0cJava\u5c31\u663e\u5f97\u6709\u4e9b\u529b\u4e0d\u4ece \u5fc3\u4e86\u3002\u9762\u5bf9\u8fd9\u4e9b\u95ee\u9898\uff0cSun\u516c\u53f8\u5728JDK1.0\u4e2d\u5c31\u5b9a\u4e49\u4e86JNI\u89c4\u8303\uff0c\u5b83\u89c4\u5b9a\u4e86Java\u5e94\u7528\u7a0b\u5e8f\u5bf9\u672c\u5730\u65b9\u6cd5\u7684\u8c03\u7528\u89c4\u5219\u3002<\/p>\n<p>\u56de\u9875\u9996<\/p>\n<p>\u5b9e\u73b0\u6b65\u9aa4\u53ca\u76f8\u5173\u51fd\u6570\u4f7f\u7528<\/p>\n<p>\u672c\u6587\u5c06\u4e00\u6b65\u6b65\u8bf4\u660e\u5728Linux\u5e73\u53f0\u4e0b\u5982\u4f55\u5b9e\u73b0\u672c\u5730\u5171\u4eab\u5e93\u4e0eJava\u534f\u540c\u5de5\u4f5c\u3002Hello World\u7a0b\u5e8f\u662f\u76ee\u524d\u6807\u51c6\u7684\u5165\u95e8\u7b2c\u4e00\u6b65\uff0c\u90a3\u4e48\uff0c\u6211\u4e5f\u4ee5\u7c7b\u4f3c\u7684\u5e94\u7528\u6700\u4e3a\u6837\u4f8b\u3002<\/p>\n<p>\u7b2c\u4e00\u6b65\uff0c\u5b9a\u4e49\u4e00\u4e2a Java \u7c7b &#8212; Hello. \u5b83\u63d0\u4f9bSayHello\u65b9\u6cd5\uff1a<\/p>\n<p>\u6b64\u65f6\u5e94\u6ce8\u610f\u4e24\u70b9\uff1a<\/p>\n<p>1.\u4e3a\u8981\u4f7f\u7528\u7684\u6bcf\u4e2a\u672c\u5730\u65b9\u6cd5\u7f16\u5199\u672c\u5730\u65b9\u6cd5\u58f0\u660e\uff0c\u5176\u58f0\u660e\u65b9\u5f0f\u4e0e\u666e\u901a Java \u65b9\u6cd5\u63a5\u53e3\u6ca1\u4ec0\u4e48\u4e0d\u540c\uff0c\u53ea\u662f\u5fc5\u987b\u6307\u5b9a native \u5173\u952e\u5b57\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<p>public native void SayHello(String strName);<\/p>\n<p>\u5728\u8fd9\u4e2a\u51fd\u6570\u4e2d\uff0c\u6211\u4eec\u5c06\u6839\u636e\u4f20\u8fdb\u7684\u4eba\u540d\uff0c\u5411\u67d0\u4eba\u95ee\u597d\u3002<\/p>\n<p>2.\u5fc5\u987b\u663e\u5f0f\u5730\u52a0\u8f7d\u672c\u5730\u4ee3\u7801\u5e93\u3002\u6211\u4eec\u9700\u5728\u7c7b\u7684\u4e00\u4e2a\u9759\u6001\u5757\u4e2d\u52a0\u8f7d\u8fd9\u4e2a\u5e93\uff1a<\/p>\n<p>static<br \/>\n{<br \/>\nSystem.loadLibrary(&#8220;hello&#8221;);<br \/>\n}<\/p>\n<p>\u518d\u52a0\u4e0a\u5fc5\u8981\u7684\u5f02\u5e38\u5904\u7406\u5c31\u751f\u6210\u5982\u4e0b\u6e90\u6587\u4ef6Hello.java\uff1a<\/p>\n<p>public class Hello<br \/>\n{<br \/>\nstatic<br \/>\n{<br \/>\ntry<br \/>\n{<br \/>\n\/\/\u6b64\u5904\u5373\u4e3a\u672c\u5730\u65b9\u6cd5\u6240\u5728\u94fe\u63a5\u5e93\u540d<br \/>\nSystem.loadLibrary(&#8220;hello&#8221;);<br \/>\n}<br \/>\ncatch(UnsatisfiedLinkError e)<br \/>\n{<br \/>\nSystem.err.println( &#8220;Cannot load hello library:\\n &#8221; +<br \/>\ne.toString() );<br \/>\n}<br \/>\n}<br \/>\npublic Hello()<br \/>\n{<br \/>\n}<br \/>\n\/\/\u58f0\u660e\u7684\u672c\u5730\u65b9\u6cd5<br \/>\npublic native void SayHello(String strName);<br \/>\n}<\/p>\n<p>\u7f16\u8bd1\u540e\u751f\u6210Hello.class\u6587\u4ef6\u3002<\/p>\n<p>\u7b2c\u4e8c\u6b65\uff0c\u751f\u6210\u672c\u5730\u94fe\u63a5\u5e93\u3002\u5177\u4f53\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n<p>1. \u8981\u4e3a\u4ee5\u4e0a\u5b9a\u4e49\u7684\u7c7b\u751f\u6210 Java \u672c\u5730\u63a5\u53e3\u5934\u6587\u4ef6\uff0c\u9700\u4f7f\u7528javah\uff0cJava \u7f16\u8bd1\u5668\u7684 javah \u529f\u80fd\u5c06\u6839\u636e Hello\u7c7b\u751f\u6210\u5fc5\u8981\u7684\u58f0\u660e\uff0c\u6b64\u547d\u4ee4\u5c06\u751f\u6210Hello.h \u6587\u4ef6\uff0c\u6211\u4eec\u5728\u5171\u4eab\u5e93\u7684\u4ee3\u7801\u4e2d\u8981\u5305\u542b\u5b83\uff0cjavah\u4e0d\u4f7f\u9ed8\u8ba4\u5185\u90e8\u547d\u4ee4\uff0c\u9700\u8981\u6307\u660e\u8def\u5f84\uff0c\u5b83\u5728JDK\u7684bin\u76ee\u5f55\u4e0b\uff0c\u5728\u6211\u7684Linux\u73af\u5883\u4e0b\u547d\u4ee4\u5982\u4e0b\uff1a<br \/>\n\/home\/jbuilder\/jdk1.3.1\/bin\/javah Hello<\/p>\n<p>\u751f\u6210\u7684Hello.h \u6587\u4ef6 \u5185\u5bb9\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<p>\/* DO NOT EDIT THIS FILE &#8211; it is machine generated *\/<br \/>\n#include &lt;jni.h&gt;<br \/>\n\/* Header for class Hello *\/<br \/>\n#ifndef _Included_Hello<br \/>\n#define _Included_Hello<br \/>\n#ifdef __cplusplus<br \/>\nextern &#8220;C&#8221; {<br \/>\n#endif<br \/>\n\/*<br \/>\n* Class:     Hello<br \/>\n* Method:    SayHello<br \/>\n* Signature: (Ljava\/lang\/String;)V<br \/>\n*\/<br \/>\nJNIEXPORT void JNICALL Java_Hello_SayHello<br \/>\n(JNIEnv *, jobject, jstring);<br \/>\n#ifdef __cplusplus<br \/>\n}<br \/>\n#endif<br \/>\n#endif<\/p>\n<p>2.\u5728\u4e0eHello.h\u76f8\u540c\u7684\u8def\u5f84\u4e0b\u521b\u5efa\u4e00\u4e2aCPP\u6587\u4ef6Hello.cpp\u3002\u5185\u5bb9\u5982\u4e0b\uff1a<\/p>\n<p>#include &#8220;Hello.h&#8221;<br \/>\n#include &lt;stdio.h&gt;<br \/>\n\/\/\u4e0eHello.h\u4e2d\u51fd\u6570\u58f0\u660e\u76f8\u540c<br \/>\nJNIEXPORT void JNICALL Java_Hello_SayHello  (JNIEnv * env, jobject arg, jstring instring)<br \/>\n{<br \/>\n\/\/\u4eceinstring\u5b57\u7b26\u4e32\u53d6\u5f97\u6307\u5411\u5b57\u7b26\u4e32UTF\u7f16\u7801\u7684\u6307\u9488<br \/>\nconst jbyte *str =<br \/>\n(const jbyte *)env-&gt;GetStringUTFChars( instring, JNI_FALSE );<br \/>\nprintf(&#8220;Hello,%s\\n&#8221;,str);<br \/>\n\/\/\u901a\u77e5\u865a\u62df\u673a\u672c\u5730\u4ee3\u7801\u4e0d\u518d\u9700\u8981\u901a\u8fc7str\u8bbf\u95eeJava\u5b57\u7b26\u4e32\u3002<br \/>\nenv-&gt;ReleaseStringUTFChars( instring, (const char *)str );<br \/>\nreturn;<br \/>\n}<\/p>\n<p>\u6240\u6709\u7684JNI\u8c03\u7528\u90fd\u4f7f\u7528\u4e86JNIEnv *\u7c7b\u578b\u7684\u6307\u9488\uff0c\u4e60\u60ef\u4e0a\u5728CPP\u6587\u4ef6\u4e2d\u5c06\u8fd9\u4e2a\u53d8\u91cf\u5b9a\u4e49\u4e3aevn\uff0c\u5b83\u662f\u4efb\u610f\u4e00\u4e2a\u672c\u5730\u65b9\u6cd5\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u3002env\u6307\u9488\u6307\u5411\u4e00\u4e2a\u51fd\u6570\u6307\u9488\u8868\uff0c\u5728VC\u4e2d\u53ef\u4ee5\u76f4\u63a5\u7528&#8221;-&gt;&#8221;\u64cd\u4f5c\u7b26\u8bbf\u95ee\u5176\u4e2d\u7684\u51fd\u6570\u3002<\/p>\n<p>jobject \u6307\u5411\u5728\u6b64 Java \u4ee3\u7801\u4e2d\u5b9e\u4f8b\u5316\u7684 Java \u5bf9\u8c61 LocalFunction\u7684\u4e00\u4e2a\u53e5\u67c4\uff0c\u76f8\u5f53\u4e8ethis\u6307\u9488\u3002<\/p>\n<p>\u540e\u7eed\u7684\u53c2\u6570\u5c31\u662f\u672c\u5730\u8c03\u7528\u4e2d\u6709Java\u7a0b\u5e8f\u4f20\u8fdb\u7684\u53c2\u6570\uff0c\u672c\u4f8b\u4e2d\u53ea\u6709\u4e00\u4e2aString\u578b\u53c2\u6570\u3002\u5bf9\u4e8e\u5b57\u7b26\u4e32\u578b\u53c2\u6570\uff0c\u56e0\u4e3a\u5728\u672c\u5730\u4ee3\u7801\u4e2d\u4e0d\u80fd\u76f4\u63a5\u8bfb\u53d6 Java \u5b57\u7b26\u4e32\uff0c\u800c\u5fc5\u987b\u5c06\u5176\u8f6c\u6362\u4e3a C \/C++\u5b57\u7b26\u4e32\u6216 Unicode\u3002\u4ee5\u4e0b\u662f\u4e09\u4e2a\u6211\u4eec\u7ecf\u5e38\u4f1a\u7528\u5230\u7684\u5b57\u7b26\u4e32\u7c7b\u578b\u5904\u7406\u7684\u51fd\u6570\uff1a<\/p>\n<p>const char* GetStringUTFChars(jstring string,jboolean* isCopy)<\/p>\n<p>\u8fd4\u56de\u6307\u5411\u5b57\u7b26\u4e32UTF\u7f16\u7801\u7684\u6307\u9488\uff0c\u5982\u679c\u4e0d\u80fd\u521b\u5efa\u8fd9\u4e2a\u5b57\u7b26\u6570\u7ec4\uff0c\u8fd4\u56denull\u3002\u8fd9\u4e2a\u6307\u9488\u5728\u8c03\u7528ReleaseStringUTFChar()\u51fd\u6570\u4e4b\u524d\u4e00\u76f4\u6709\u6548\u3002<\/p>\n<p>\u53c2\u6570\uff1astring\t\tJava\u5b57\u7b26\u4e32\u5bf9\u8c61<br \/>\nisCopy\t\t\u5982\u679c\u8fdb\u884c\u62f7\u8d1d\uff0c\u6307\u5411\u4ee5JNI_TRUE\u586b\u5145\u7684jboolean,\u5426\u5219\u6307\u5411\u4ee5JNI_FALSE\u586b\u5145\u7684jboolean\u3002<br \/>\nvoid ReleaseStringUTFChars(jstring str, const char* chars)<br \/>\n\u901a\u77e5\u865a\u62df\u673a\u672c\u5730\u4ee3\u7801\u4e0d\u518d\u9700\u8981\u901a\u8fc7chars\u8bbf\u95eeJava\u5b57\u7b26\u4e32\u3002<\/p>\n<p>\u53c2\u6570\uff1astring\t\tJava\u5b57\u7b26\u4e32\u5bf9\u8c61<br \/>\nchars\t\t\u7531GetStringChars\u8fd4\u56de\u7684\u6307\u9488<br \/>\njstring NewStringUTF(const char *utf)<br \/>\n\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684Java\u5b57\u7b26\u4e32\u5e76\u5c06utf\u5185\u5bb9\u62f7\u8d1d\u5165\u65b0\u4e32\uff0c\u5982\u679c\u4e0d\u80fd\u521b\u5efa\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c<br \/>\n\u8fd4\u56denull\u3002\u901a\u5e38\u5728\u53cd\u503c\u7c7b\u578b\u4e3astring\u578b\u65f6\u7528\u5230\u3002<\/p>\n<p>\u53c2\u6570\uff1autf\t\tUTF\u7f16\u7801\u7684\u5b57\u7b26\u4e32\u6307\u9488<br \/>\n\u5bf9\u4e8e\u6570\u503c\u578b\u53c2\u6570\uff0c\u5728C\/C++\u4e2d\u53ef\u76f4\u63a5\u4f7f\u7528\uff0c\u5176\u5b57\u8282\u5bbd\u5ea6\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<p>Java\tC\/C++\t\u5b57\u8282\u6570<br \/>\nboolean\tjboolean\t1<br \/>\nbyte\tjbyte\t1<br \/>\nchar\tjchar\t2<br \/>\nshort\tjshort\t2<br \/>\nint\tjint\t4<br \/>\nlong\tjlong\t8<br \/>\nfloat\tjfloat\t4<br \/>\ndouble\tjdouble\t8<\/p>\n<p>\u5bf9\u4e8e\u6570\u7ec4\u578b\u53c2\u6570\uff0c<br \/>\nJava\tC\/C++<br \/>\nboolean[ ]\tJbooleanArray<br \/>\nbyte[ ]\tJbyteArray<br \/>\nchar[ ]\tJcharArray<br \/>\nshort[ ]\tJshortArray<br \/>\nint[ ]\tJintArray<br \/>\nlong[ ]\tJlongArray<br \/>\nfloat[ ]\tJfloatArray<br \/>\ndouble[ ]\tJdoubleArray<br \/>\n\u5bf9\u4e8e\u4e0a\u8ff0\u7c7b\u578b\u6570\u7ec4\uff0c\u6709\u4e00\u7ec4\u51fd\u6570\u4e0e\u5176\u5bf9\u5e94\u3002\u4ee5\u4e0b\u51fd\u6570\u4e2dXxx\u4e3a\u5bf9\u5e94\u7c7b\u578b\u3002<br \/>\nxxx * GetXxxArrayElements(xxxArray array, jboolean *isCopy)<br \/>\n\u4ea7\u751f\u4e00\u4e2a\u6307\u5411Java\u6570\u7ec4\u5143\u7d20\u7684C\u6307\u9488\u3002\u4e0d\u518d\u9700\u8981\u65f6\uff0c\u9700\u5c06\u6b64\u6307\u9488\u4f20\u7ed9ReleaseXxxArrayElemes\u3002<\/p>\n<p>\u53c2\u6570\uff1aarray\t\t\t\u6570\u7ec4\u5bf9\u8c61<br \/>\nisCopy\t\t\u5982\u679c\u8fdb\u884c\u62f7\u8d1d\uff0c\u6307\u5411\u4ee5JNI_TRUE\u586b\u5145\u7684jboolean,\u5426\u5219\u6307\u5411\u4ee5JNI_FALSE\u586b\u5145\u7684jboolean\u3002<br \/>\n\u4f8b\u5982\uff1a jboolean * GetBooleanArrayElements(jbooleanArray array, jboolean *isCopy)<br \/>\nvoid ReleaseXxxArrayElements(xxxArray array,xxx *elems, jint mode)<br \/>\n\u901a\u77e5\u865a\u62df\u673a\u4e0d\u518d\u9700\u8981\u4eceGetXxxArrayElements\u5f97\u5230\u7684\u6307\u9488\u3002<\/p>\n<p>\u53c2\u6570\uff1aarray\t\t\t\u6570\u7ec4\u5bf9\u8c61<br \/>\nelems\t\t\u4e0d\u518d\u9700\u8981\u7684\u6307\u5411\u6570\u7ec4\u5143\u7d20\u7684\u6307\u9488<br \/>\nmode\t\t0\uff1d\u5728\u66f4\u65b0\u6570\u7ec4\u5143\u7d20\u540e\u91ca\u653eelems\u7f13\u51b2\u5668<br \/>\nJNI_COMMIT\uff1d\u5728\u66f4\u65b0\u6570\u7ec4\u5143\u7d20\u540e\u4e0d\u91ca\u653eelems\u7f13\u51b2\u5668<br \/>\nJNI_ABORT\uff1d\u4e0d\u66f4\u65b0\u6570\u7ec4\u5143\u7d20\u91ca\u653eelems\u7f13\u51b2\u5668<br \/>\n\u4f8b\u5982\uff1avoid ReleaseBooleanArrayElements(jbooleanArray array,jboolean *elems,     jint mode)<br \/>\nxxxArray NewXxxArray(jsize len)<br \/>\n\u4ea7\u751f\u4e00\u4e2a\u65b0\u7684\u6570\u7ec4\uff0c\u901a\u5e38\u5728\u53cd\u503c\u7c7b\u578b\u4e3a\u6570\u7ec4\u578b\u65f6\u7528\u5230<\/p>\n<p>\u53c2\u6570\uff1alen\t\t\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u4e2a\u6570\u3002<br \/>\n\u4f8b\u5982\uff1ajbooleanArray NewBooleanArray(jsize len)<\/p>\n<p>3\uff0e\u7f16\u8bd1\u751f\u6210\u5171\u4eab\u5e93\u3002<\/p>\n<p>\u4f7f\u7528GCC\u65f6,\u5fc5\u987b\u901a\u77e5\u7f16\u8bd1\u5668\u5728\u4f55\u5904\u67e5\u627e\u6b64 Java \u672c\u5730\u65b9\u6cd5\u7684\u652f\u6301\u6587\u4ef6\uff0c\u5e76\u4e14\u663e\u5f0f\u901a\u77e5\u7f16\u8bd1\u5668\u751f\u6210\u4f4d\u7f6e\u65e0\u5173\u7684\u4ee3\u7801\uff0c\u5728\u6211\u7684\u73af\u5883\u4e2d\u6309\u5982\u4e0b\u8fc7\u7a0b\u7f16\u8bd1\uff1a<\/p>\n<p>gcc -I\/home\/jbuilder\/jdk1.3.1\/include -I\/home\/jbuilder\/jdk1.3.1\/include\/linux -fPIC -c Hello.c<\/p>\n<p>\u751f\u6210Hello.o<\/p>\n<p>gcc -shared -Wl,-soname,libhello.so.1 -o libhello.so.1.0 Hello.o<\/p>\n<p>\u751f\u6210libhello.so.1.0<\/p>\n<p>\u63a5\u4e0b\u6765\u5c06\u751f\u6210\u7684\u5171\u4eab\u5e93\u62f7\u8d1d\u4e3a\u6807\u51c6\u6587\u4ef6\u540d<\/p>\n<p>cp libhello.so.1.0 libhello.so<\/p>\n<p>\u6700\u540e\u901a\u77e5\u52a8\u6001\u94fe\u63a5\u7a0b\u5e8f\u6b64\u5171\u4eab\u6587\u4ef6\u7684\u8def\u5f84\u3002<\/p>\n<p>export LD_LIBRARY_PATH=`pwd`:$LD_LIBRARY_PATH<\/p>\n<p>4\uff0e\u7f16\u5199\u4e00\u4e2a\u7b80\u5355\u7684Java\u7a0b\u5e8f\u6765\u6d4b\u8bd5\u6211\u4eec\u7684\u672c\u5730\u65b9\u6cd5\u3002<\/p>\n<p>\u5c06\u5982\u4e0b\u6e90\u7801\u5b58\u4e3aToSay.java\uff1a<\/p>\n<p>import Hello;<br \/>\nimport java.util.*;<br \/>\npublic class ToSay<br \/>\n{<br \/>\npublic static void main(String argv[])<br \/>\n{<br \/>\nToSay say = new ToSay();<br \/>\n}<br \/>\npublic ToSay()<br \/>\n{<br \/>\nHello h = new Hello();<br \/>\n\/\/\u8c03\u7528\u672c\u5730\u65b9\u6cd5\u5411John\u95ee\u597d<br \/>\nh.SayHello(&#8220;John&#8221;);<br \/>\n}<br \/>\n}<\/p>\n<p>\u7528javac\u7f16\u8bd1ToSay.java\uff0c\u751f\u6210ToSay.class<br \/>\n\u5411\u6267\u884c\u666e\u901aJava\u7a0b\u5e8f\u4e00\u6837\u4f7f\u7528java ToSay\uff0c\u6211\u4eec\u4f1a\u770b\u5230\u5728\u5c4f\u5e55\u4e0a\u51fa\u73b0Hello,John\u3002<br \/>\n\u5230\u8fd9\u91cc\u6211\u4eec\u5c31\u5c06\u6574\u4e2a\u7684\u672c\u5730\u8c03\u7528\u7f16\u5199\u8fc7\u7a0b\u5927\u6982\u6d4f\u89c8\u4e86\u4e00\u904d\u3002<\/p>\n<p>\u56de\u9875\u9996<\/p>\n<p>\u5e94\u7528\u4e2d\u6ce8\u610f\u4e8b\u9879<\/p>\n<p>1\uff0e \u5982\u679c\u53ef\u4ee5\u901a\u8fc7TCP\/IP\u5b9e\u73b0Java\u4ee3\u7801\u4e0e\u672c\u5730C\/C++\u4ee3\u7801\u7684\u4ea4\u4e92\u5de5\u4f5c\uff0c\u90a3\u4e48\u6700\u597d\u4e0d\u4f7f\u7528\u4ee5\u4e0a\u63d0\u5230\u7684JNI\u7684\u65b9\u5f0f\uff0c\u56e0\u4e3a\u4e00\u6b21JNI\u8c03\u7528\u975e\u5e38\u8017\u65f6\uff0c\u5927\u6982\u8981\u82b10.5\uff5e1\u4e2a\u6beb\u79d2\u3002<\/p>\n<p>2\uff0e \u5728\u4e00\u4e2aApplet\u5e94\u7528\u4e2d\uff0c\u4e0d\u8981\u4f7f\u7528JNI\u3002\u56e0\u4e3a\u5728 applet \u4e2d\u53ef\u80fd\u5f15\u53d1\u5b89\u5168\u5f02\u5e38\u3002<\/p>\n<p>3\uff0e \u5c06\u6240\u6709\u672c\u5730\u65b9\u6cd5\u90fd\u5c01\u88c5\u5728\u5355\u4e2a\u7c7b\u4e2d\uff0c\u8fd9\u4e2a\u7c7b\u8c03\u7528\u5355\u4e2a DLL\u3002\u5bf9\u4e8e\u6bcf\u79cd\u76ee\u6807\u64cd\u4f5c\u7cfb\u7edf\uff0c\u90fd\u53ef\u4ee5\u7528\u7279\u5b9a\u4e8e\u9002\u5f53\u5e73\u53f0\u7684\u7248\u672c\u66ff\u6362\u8fd9\u4e2a DLL\u3002\u8fd9\u6837\u5c31\u53ef\u4ee5\u5c06\u672c\u5730\u4ee3\u7801\u7684\u5f71\u54cd\u51cf\u81f3\u6700\u5c0f\uff0c\u5e76\u6709\u52a9\u4e8e\u5c06\u4ee5\u540e\u6240\u9700\u7684\u79fb\u690d\u95ee\u9898\u5305\u542b\u5728\u5185\u3002<\/p>\n<p>4\uff0e \u672c\u5730\u65b9\u6cd5\u8981\u7b80\u5355\u3002\u5c3d\u91cf\u5c06\u751f\u6210\u7684DLL \u5bf9\u4efb\u4f55\u7b2c\u4e09\u65b9\u8fd0\u884c\u65f6 DLL \u7684\u4f9d\u8d56\u51cf\u5230\u6700\u5c0f\u3002\u4f7f\u672c\u5730\u65b9\u6cd5\u5c3d\u91cf\u72ec\u7acb\uff0c\u4ee5\u5c06\u52a0\u8f7dDLL \u548c\u5e94\u7528\u7a0b\u5e8f\u6240\u9700\u7684\u5f00\u9500\u51cf\u5230\u6700\u5c0f\u3002\u5982\u679c\u5fc5\u987b\u8981\u8fd0\u884c\u65f6 DLL\uff0c\u5219\u5e94\u968f\u5e94\u7528\u7a0b\u5e8f\u4e00\u8d77\u63d0\u4f9b\u5b83\u4eec\u3002<\/p>\n<p>5\uff0e \u672c\u5730\u4ee3\u7801\u8fd0\u884c\u65f6\uff0c\u6ca1\u6709\u6709\u6548\u5730\u9632\u6570\u7ec4\u8d8a\u754c\u9519\u8bef\u3001\u9519\u8bef\u6307\u9488\u5f15\u7528\u5e26\u6765\u7684\u95f4\u63a5\u9519\u8bef\u7b49\u3002\u6240\u4ee5\u5fc5\u987b\u4fdd\u8bc1\u4fdd\u8bc1\u672c\u5730\u4ee3\u7801\u7684\u7a33\u5b9a\u6027\uff0c\u56e0\u4e3a\uff0c\u4e1d\u6beb\u7684\u9519\u8bef\u90fd\u53ef\u80fd\u5bfc\u81f4Java\u865a\u62df\u673a\u5d29\u6e83\u3002<\/p>\n<p>\u56de\u9875\u9996<\/p>\n<p>\u7ed3\u675f\u8bed<\/p>\n<p>JNI\u8c03\u7528\u89c4\u8303\u7ed9\u6211\u4eec\u590d\u7528\u539f\u6709\u5176\u5b83\u8bed\u8a00\u7684\u4ee3\u7801\u63d0\u4f9b\u4e86\u7b80\u5355\u6613\u7528\u7684\u63a5\u53e3\uff0c\u53ef\u4ee5\u8282\u7701\u5927\u91cf\u7684\u8d22\u529b\uff0c\u4f7f\u6211\u4eec\u53ef\u4ee5\u5728\u4eab\u53d7Java\u5e26\u6765\u7684\u5f00\u53d1\u901f\u5ea6\u7684\u540c\u65f6\uff0c\u4e0d\u5fc5\u653e\u5f03\u65e7\u6709\u8d44\u6e90\u3002<\/p>\n<p>\u53c2\u8003\u8d44\u6599<\/p>\n<p>Cay S.Horstmnn,Gary Cornell,Core Java 2 Volume II:Advanced Fearutes,Prentice Hall,2000.<\/p>\n<p>Rob Gordon and Alan,Essential JNI, Java Native Interface, Prentice Hall,1998<\/p>\n<p><!-- m --><a class=\"postlink\" href=\"http:\/\/java.sun.com\/products\/jdk\/1.1\/docs\/guide\/jni\/\">http:\/\/java.sun.com\/products\/jdk\/1.1\/docs\/guide\/jni\/<\/a><!-- m --><\/p>\n<p>\u5173\u4e8e\u4f5c\u8005<\/p>\n<p>\u5f20\u7ffc\u7fd4 \uff1a\u62e5\u67098\u5e74\u7684\u8f6f\u4ef6\u5f00\u53d1\u7ecf\u9a8c\u3002\u66fe\u7ecf\u9886\u5bfc\u745e\u661f\u6740\u6bd2\u8f6f\u4ef6\u7f51\u7edc\u7248\u548cI&#8217;m\u4e0a\u7f51\u7ba1\u7406\u7cfb\u7edf\u7684\u7814\u53d1\u5de5\u4f5c\u3002\u73b0\u4efb\u5317\u4eac\u534e\u590f\u65b0\u89c6\u79d1\u6280\u6709\u9650\u516c\u53f8\u7814\u53d1\u90e8\u7ecf\u7406<br \/>\n\u674e\u5e86\u660e\uff1a\u4ece\u4e8b\u8f6f\u4ef6\u5f00\u53d1\u5df2\u7ecf\u67095\u5e74\u3002\u6709\u4e30\u5bcc\u7684\u5d4c\u5165\u5f0fLinux\u548cJava\u5f00\u53d1\u7ecf\u9a8c\u3002\u73b0\u4efb\u5e7f\u4e1c\u6377\u8fdc\u8d44\u8baf\u79d1\u6280\u6709\u9650\u516c\u53f8\u6280\u672f\u603b\u76d1<\/p><\/div>\n<div class=\"postbody\">\n<div class=\"postbody\"><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>From:http:\/\/www.ibm.com\/developerworks\/cn\/java\/l-linux-jni\/ \u5728Linux\u5e73\u53f0\u4e0b\u4f7f\u7528JNI \u7ea7\u522b\uff1a \u521d\u7ea7 \u5f20\u7ffc\u7fd4 \u674e\u5e86\u660e, 2002 \u5e74 10 \u6708 29 \u65e5 \u672c\u6587\u7b80\u8981\u4ecb\u7ecd\u4e86JNI\u8c03\u7528\u89c4\u8303\uff0c\u53ca\u5e38\u7528\u51fd\u6570\u3002\u5e76\u901a\u8fc7\u5177\u4f53\u793a\u4f8b\u7a0b\u5e8f\u5c55\u793a\u4e86\u5b9e\u73b0\u4e00\u4e2a\u672c\u5730\u8c03\u7528\u7684\u57fa\u672c\u6b65\u9aa4\u3002 \u5f15\u8a00 Java \u7684\u51fa\u73b0\u7ed9\u5927\u5bb6\u5f00\u53d1\u5e26\u6765\u7684\u6781\u5927\u7684\u65b9\u4fbf\u3002\u4f46\u662f\uff0c\u5982\u679c\u6211\u4eec\u6709\u5927\u91cf\u539f\u6709\u7684\u7ecf\u8fc7\u5e7f\u6cdb\u6d4b\u8bd5\u7684\u975eJava\u4ee3\u7801\uff0c\u5c06\u5b83\u4eec\u5168\u90e8\u7528Java\u6765\u91cd\u5199\uff0c\u6050\u6015\u4f1a\u5e26\u6765\u5de8\u5927\u7684\u5de5\u4f5c\u91cf\u548c\u957f \u671f\u7684\u6d4b\u8bd5\uff1b\u5982\u679c\u6211\u4eec\u7684\u5e94\u7528\u4e2d\u9700\u8981\u8bbf\u95ee\u5230\u7279\u5b9a\u7684\u8bbe\u5907\uff0c\u751a\u81f3\u662f\u4ec5\u7b26\u5408\u516c\u53f8\u5185\u90e8\u4fe1\u606f\u4ea4\u4e92\u89c4\u8303\u7684\u8bbe\u5907\uff0c\u6216\u67d0\u4e2a\u7279\u5b9a\u7684\u64cd\u4f5c\u7cfb\u7edf\u624d\u6709\u7684\u7279\u6027\uff0cJava\u5c31\u663e\u5f97\u6709\u4e9b\u529b\u4e0d\u4ece \u5fc3\u4e86\u3002\u9762\u5bf9\u8fd9\u4e9b\u95ee\u9898\uff0cSun\u516c\u53f8\u5728JDK1.0\u4e2d\u5c31\u5b9a\u4e49\u4e86JNI\u89c4\u8303\uff0c\u5b83\u89c4\u5b9a\u4e86Java\u5e94\u7528\u7a0b\u5e8f\u5bf9\u672c\u5730\u65b9\u6cd5\u7684\u8c03\u7528\u89c4\u5219\u3002 \u56de\u9875\u9996 \u5b9e\u73b0\u6b65\u9aa4\u53ca\u76f8\u5173\u51fd\u6570\u4f7f\u7528 \u672c\u6587\u5c06\u4e00\u6b65\u6b65\u8bf4\u660e\u5728Linux\u5e73\u53f0\u4e0b\u5982\u4f55\u5b9e\u73b0\u672c\u5730\u5171\u4eab\u5e93\u4e0eJava\u534f\u540c\u5de5\u4f5c\u3002Hello World\u7a0b\u5e8f\u662f\u76ee\u524d\u6807\u51c6\u7684\u5165\u95e8\u7b2c\u4e00\u6b65\uff0c\u90a3\u4e48\uff0c\u6211\u4e5f\u4ee5\u7c7b\u4f3c\u7684\u5e94\u7528\u6700\u4e3a\u6837\u4f8b\u3002 \u7b2c\u4e00\u6b65\uff0c\u5b9a\u4e49\u4e00\u4e2a Java \u7c7b &#8212; Hello. \u5b83\u63d0\u4f9bSayHello\u65b9\u6cd5\uff1a \u6b64\u65f6\u5e94\u6ce8\u610f\u4e24\u70b9\uff1a 1.\u4e3a\u8981\u4f7f\u7528\u7684\u6bcf\u4e2a\u672c\u5730\u65b9\u6cd5\u7f16\u5199\u672c\u5730\u65b9\u6cd5\u58f0\u660e\uff0c\u5176\u58f0\u660e\u65b9\u5f0f\u4e0e\u666e\u901a Java \u65b9\u6cd5\u63a5\u53e3\u6ca1\u4ec0\u4e48\u4e0d\u540c\uff0c\u53ea\u662f\u5fc5\u987b\u6307\u5b9a native \u5173\u952e\u5b57\uff0c\u5982\u4e0b\u6240\u793a\uff1a public native void SayHello(String strName); \u5728\u8fd9\u4e2a\u51fd\u6570\u4e2d\uff0c\u6211\u4eec\u5c06\u6839\u636e\u4f20\u8fdb\u7684\u4eba\u540d\uff0c\u5411\u67d0\u4eba\u95ee\u597d\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34],"tags":[],"class_list":["post-146","post","type-post","status-publish","format-standard","hentry","category-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u5728Linux\u5e73\u53f0\u4e0b\u4f7f\u7528JNI(\u8f6c) - Jianqing&#039;s Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pjq.me\/?p=146\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5728Linux\u5e73\u53f0\u4e0b\u4f7f\u7528JNI(\u8f6c) - Jianqing&#039;s Blog\" \/>\n<meta property=\"og:description\" content=\"From:http:\/\/www.ibm.com\/developerworks\/cn\/java\/l-linux-jni\/ \u5728Linux\u5e73\u53f0\u4e0b\u4f7f\u7528JNI \u7ea7\u522b\uff1a \u521d\u7ea7 \u5f20\u7ffc\u7fd4 \u674e\u5e86\u660e, 2002 \u5e74 10 \u6708 29 \u65e5 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