Java 利用JavaCPP 调用算法
凌征
配置liunx 环境系统
配置so 文件存放路径
[root@arch2 ~]# cat /etc/ld.so.conf.d/so.conf
/opt/app/tools/so/
从新调用ldconfig 命令
ldconfig
配置java 项目
- 配置pom 文件
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.jacdong</groupId>
<artifactId>javacpptest</artifactId>
<version>0.1-SNAPSHOT</version>
<properties>
<include.path>${basedir}/cppbuild</include.path>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<javacpp.cppbuild.skip>true
</javacpp.cppbuild.skip> <!-- To skip execution of cppbuild.sh: -Djavacpp.cppbuild.skip=true -->
<javacpp.parser.skip>false
</javacpp.parser.skip> <!-- To skip header file parsing phase: -Djavacpp.parser.skip=true -->
<javacpp.compiler.skip>true
</javacpp.compiler.skip> <!-- To skip native compilation phase: -Djavacpp.compiler.skip=true -->
<javacpp.moduleId>${project.artifactId}</javacpp.moduleId>
<javacpp.platform.root></javacpp.platform.root>
<javacpp.platform.compiler></javacpp.platform.compiler>
<javacpp.platform.extension></javacpp.platform.extension>
<javacpp.platform.linux-x86>linux-x86</javacpp.platform.linux-x86>
<javacpp.platform.linux-x86_64>linux-x86_64</javacpp.platform.linux-x86_64>
<javacpp.platform>linux-x86_64</javacpp.platform>
<skipTests>true</skipTests>
</properties>
<dependencies>
<dependency>
<groupId>org.bytedeco</groupId>
<artifactId>javacpp</artifactId>
<version>1.5.3</version>
</dependency>
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>2.10</version>
</plugin>
<plugin>
<groupId>org.bytedeco</groupId>
<artifactId>javacpp</artifactId>
<version>1.5.3</version>
<configuration>
<properties>${javacpp.platform}</properties>
<propertyKeysAndValues>
<property>
<name>platform.root</name>
<value>${javacpp.platform.root}</value>
</property>
<property>
<name>platform.compiler</name>
<value>${javacpp.platform.compiler}</value>
</property>
<property>
<name>platform.extension</name>
<value>${javacpp.platform.extension}</value>
</property>
</propertyKeysAndValues>
<classPath>${project.build.outputDirectory}</classPath>
<includePaths>
<includePath>${basedir}/src/main/resources/linux-x86_64</includePath>
</includePaths>
<linkPaths>
</linkPaths>
</configuration>
<executions>
<execution>
<id>javacpp.parser</id>
<phase>generate-sources</phase>
<goals>
<goal>build</goal>
</goals>
<configuration>
<skip>false</skip>
<outputDirectory>${project.build.sourceDirectory}</outputDirectory>
<classOrPackageName>com.jacdong.preset.*</classOrPackageName>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.9</version>
<configuration>
<forkMode>once</forkMode>
<environmentVariables>
<LD_LIBRARY_PATH>target/classes/linux-x86_64</LD_LIBRARY_PATH>
</environmentVariables>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.1</version>
<executions>
<execution>
<id>build-jnilib</id>
<phase>process-classes</phase>
<goals>
<goal>exec</goal>
</goals>
<configuration>
<executable>java</executable>
<commandlineArgs>-jar ./libs/javacpp-1.5.jar -Xcompiler -g -Xcompiler -ggdb -nodelete -d target/classes/linux-x86_64 -Xcompiler -I${env.JAVA_HOME}/include -Xcompiler -I${env.JAVA_HOME}/include/linux -Xcompiler -fvisibility=default -Xcompiler -rdynamic -Xcompiler -std=c++11 -classpath target/classes com.jacdong.wrapper.JavaCPPTest</commandlineArgs>
</configuration>
</execution>
<execution>
<id>echoPath</id>
<phase>install</phase>
<goals>
<goal>exec</goal>
</goals>
<configuration>
<executable>echo</executable>
<commandlineArgs>"sudo cp ${basedir}/target/classes/linux-x86_64/*.so /usr/lib/;sudo ldconfig"</commandlineArgs>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
<configuration>
<filesets>
<fileset>
<directory>src/main/java/com/jacdong/rtcm/wrapper/</directory>
<includes>
<include>JavaCPPTestTmp.java</include>
</includes>
<followSymlinks>false</followSymlinks>
</fileset>
</filesets>
</configuration>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself.-->
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.bytedeco</groupId>
<artifactId>javacpp</artifactId>
<versionRange>
[1.5.3,)
</versionRange>
<goals>
<goal>build</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore></ignore>
</action>
</pluginExecution>
<pluginExecution>
<pluginExecutionFilter>
<groupId>
org.codehaus.mojo
</groupId>
<artifactId>
exec-maven-plugin
</artifactId>
<versionRange>
[1.1,)
</versionRange>
<goals>
<goal>exec</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore></ignore>
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
配置文件当中需要主要的几点
<!--第一次生成javacpp 文件的时候，skip 一定要设置为false ，后期对于生成的类进行了处理之后，为了避免每次运行都重启，可以把skip 设置为true-->
<configuration>
<skip>false</skip>
<outputDirectory>${project.build.sourceDirectory}</outputDirectory> <classOrPackageName>com.jacdong.preset.* </classOrPackageName>
</configuration>
<!--commandlineArgs 一定不要换行-->
<configuration>
<executable>java</executable>
<commandlineArgs>-jar ./libs/javacpp-1.5.jar -Xcompiler -g -Xcompiler -ggdb -nodelete -d target/classes/linux-x86_64 -Xcompiler -I${env.JAVA_HOME}/include -Xcompiler -I${env.JAVA_HOME}/include/linux -Xcompiler -fvisibility=default -Xcompiler -rdynamic -Xcompiler -std=c++11 -classpath target/classes com.jacdong.wrapper.SingleStationIono</commandlineArgs>
</configuration>
定义自己的map 类
@Properties(target = "com.jacdong.wrapper.JavaCPPTestTmp",
value = {@Platform(include = {"javacpp.h"},
compiler = "cpp11")})
public class JavacppMapper implements InfoMapper{
public void map(InfoMap infoMap) {
infoMap.put(new Info().cppNames("_stdcall").skip())
.put();
}
}
注意点
在利用javacpp 的时候，经常会出现找不到so 文件的情况，这个时候，大家可以把so 文件copy 到/usr/lib 目录下，然后更改相应的权限。
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