Ruapu Java binding (#82)

* Fix rua on macOS

Signed-off-by: Molly Sophia <mollysophia379@gmail.com>

* Release allocate resource

* Formatting

* feat: package native lib into jar;

Signed-off-by: LinHeLurking <LinHe.Lurking@gmail.com>

* fix: multiple platform gradle build;

Signed-off-by: LinHeLurking <LinHe.Lurking@gmail.com>

* fix: linux build;

Signed-off-by: LinHe <LinHe.Lurking@gmail.com>

* Update command to use windows cmd


---------

Signed-off-by: Molly Sophia <mollysophia379@gmail.com>
Signed-off-by: LinHeLurking <LinHe.Lurking@gmail.com>
Signed-off-by: LinHe <LinHe.Lurking@gmail.com>
Co-authored-by: cenkang <cenkang@apical.com.cn>
Co-authored-by: Molly Sophia <mollysophia379@gmail.com>
Co-authored-by: LinHeLurking <LinHe.Lurking@gmail.com>

java/.gitignore

@@ -0,0 +1,39 @@
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### IntelliJ IDEA ###
+.idea/
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store