java 编译 native_Java native代码编译步骤简书

Java native代码编译步骤简书

目的：防止java代码反编译获取密码算法

(1)编写实现类

com.godlet.PasswordAuth.java

(2)编译java代码

javac PasswordAuth.java

//中文乱码问题

javac -encoding utf-8 PasswordAuth.java

(3)切换到代码home目录

cd ..\..\

(4)生成Native 头文件 com_godlet_PasswordAuth.h

javah com.godlet.PasswordAuth

(5)生成动态native动态链接库

//windows 安装MinGW-W64 使用gcc

gcc -c -I"%JAVA_HOME%\include" -I"%JAVA_HOME%\include\win32" com_godlet_PasswordAuth.c -o PasswordAuth.o

gcc -Wl,--add-stdcall-alias -shared -o PasswordAuth.dll PasswordAuth.o

//linux

gcc com_godlet_PasswordAuth.c -I"${JAVA_HOME}/include" -I"${JAVA_HOME}/include/linux" -fpic -shared -o libPasswordAuth.so

(6)运行程序

//运行java程序 java.library.path在项目配置中修改VM options

java -Djava.library.path=. com.godlet.PasswordAuth

//或者在linux /usr/lib目录上放入so库或者创建.so库路径软链接(推荐)

//ln -s /opt/java/libPasswordAuth.so libPasswordAuth.so

//java com.godlet.PasswordAuth