本文主要是介绍java通过jni调用tuxedo，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
如果想要一个免费，不使用Weblogic WTC JOLT，实现Java调用Tuxedo，那最容易想到的就是通过JNI，让Java执行native代码，实现对Tuxedo的调用。
环境：Suse 9 Tuxedo 8.1 Java1.4 $JAVA_HOME $TUXDIR
实现的步骤
编写带native方法的Java类
/*** This is a demo class for test JNI***/public class Hello {static {try {// "hello" means the library of native methodSystem.loadLibrary("hello");} catch (UnsatisfiedLinkError e) {System.err.println("Cannot load hello library:“n " + e.toString());}
2.编译为.class文件
javac Hello.java
3.生成.h文件
javah Hello
4.编写对应的C文件，我一般直接拷贝一个.h文件为.c,之后修改,感觉比较不会出错
#include <stdio.h>#include "atmi.h" /* TUXEDO Header File *//* DO NOT EDIT THIS FILE - it is machine generated */#include <jni.h>/* Header for class Hello */#ifndef _Included_Hello#define _Included_Hello#ifdef __cplusplusextern "C" {#endif/** Class: Hello* Method: SayHello* Signature: ()V*/JNIEXPORT void JNICALL Java_Hello_SayHello(JNIEnv * env, jobject arg){char *sendbuf, *rcvbuf;long sendlen, rcvlen;int ret;printf("THIS IS JNI Say Hello“n");/* Attach to System/T as a Client Process */if (tpinit((TPINIT *) NULL) == -1) {(void) fprintf(stderr, "Tpinit failed“n");exit(1);}sendlen = 32;/* Allocate STRING buffers for the request and the reply */if((sendbuf = (char *) tpalloc("STRING", NULL, sendlen+1)) == NULL) {(void) fprintf(stderr,"Error allocating send buffer“n");tpterm();exit(1);}|||if((rcvbuf = (char *) tpalloc("STRING", NULL, sendlen+1)) == NULL) {(void) fprintf(stderr,"Error allocating receive buffer“n");tpfree(sendbuf);tpterm();exit(1);}(void) strcpy(sendbuf, "0123456789abcdef0123456789abcdef");/* Request the service TOUPPER, waiting for a reply */ret = tpcall("TOUPPER", (char *)sendbuf, 0, (char **)&rcvbuf, &rcvlen, (long)0);if(ret == -1) {(void) fprintf(stderr, "Can‘t send request to service TOUPPER“n");(void) fprintf(stderr, "Tperrno = %d“n", tperrno);tpfree(sendbuf);tpfree(rcvbuf);tpterm();exit(1);}(void) fprintf(stdout, "Returned string is: %s“n", rcvbuf);/* Free Buffers & Detach from System/T */tpfree(sendbuf);tpfree(rcvbuf);tpterm();return;}#ifdef __cplusplus}#endif#endif
5.编译.c为.o .so
gcc -I$JAVA_HOME/include -I$JAVA_HOME/include/linux -I$TUXDIR/include -c -L${TUXDIR}/lib Hello.cgcc -shared -I$JAVA_HOME/include -I$JAVA_HOME/include/linux -I$TUXDIR/include -L$TUXDIR/lib -ltux -lbuft -lfml -lfml32 -lengine -ldl -lpthread /usr/lib/libcrypt.a -Wl,-soname,libhello.so.1 -o libhello.so.1.0 Hello.ocp libhello.so.1.0 libhello.so
6.ldd libhello.so
如果看到一下的输出,恭喜!基本OK啦!|||
linux-gate.so.1 => (0xffffe000)libtux.so => /home/tuxedo/product/tuxedo8.1/lib/libtux.so (0x40003000)libbuft.so => /home/tuxedo/product/tuxedo8.1/lib/libbuft.so (0x40110000)libfml.so => /home/tuxedo/product/tuxedo8.1/lib/libfml.so (0x40112000)libfml32.so => /home/tuxedo/product/tuxedo8.1/lib/libfml32.so (0x4012a000)libengine.so => /home/tuxedo/product/tuxedo8.1/lib/libengine.so (0x40144000)libdl.so.2 => /lib/libdl.so.2 (0x401db000)libpthread.so.0 => /lib/tls/libpthread.so.0 (0x401de000)libc.so.6 => /lib/tls/libc.so.6 (0x401ee000)libgiconv.so => /home/tuxedo/product/tuxedo8.1/lib/libgiconv.so (0x40302000)libusort.so => /home/tuxedo/product/tuxedo8.1/lib/libusort.so (0x403d6000)/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000)
7.编写测试类
/*** This class used test JNI method in Hello**/public class SayHello {/*** @param args*/public static void main(String args) {Hello hello = new Hello();hello.SayHello();}}
8.执行测试
java -cp . SayHello
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