用JNI启动Jar

[ElisaMin]

use std::ffi::CString;
use std::os::raw::{c_char, c_int};

fn main() {
    // Get the number of command line arguments.
    let argc = unsafe {
        let mut argc = 0;
        std::getenv("argc")
            .map(|s| s.parse().unwrap())
            .unwrap_or(argc);
        argc
    };

    // Get the command line arguments.
    let argv = unsafe {
        let mut argv = Vec::new();
        for i in 0..argc {
            let arg = std::getenv(format!("argv{}", i)).unwrap_or("");
            argv.push(CString::new(arg).unwrap());
        }
        argv
    };

    // Initialize the JVM.
    let status = unsafe {
        let status = jli_init(argc, argv.as_ptr());
        if status != 0 {
            println!("Error initializing the JVM: {}", status);
            std::process::exit(1);
        }
        status
    };

    // Launch the Java program.
    let status = unsafe {
        let status = jli_launch(argc, argv.as_ptr());
        if status != 0 {
            println!("Error launching the Java program: {}", status);
            std::process::exit(1);
        }
        status
    };

    // Terminate the JVM.
    unsafe {
        jli_term();
    }
}

extern "C" {
    fn jli_init(argc: c_int, argv: *const *const c_char) -> c_int;
    fn jli_launch(argc: c_int, argv: *const *const c_char) -> c_int;
    fn jli_term();
}