Java 直接调用JS文件,Java执行JS文件脚本

Java 直接调用JS文件,Java执行JS文件脚本

JavaScriptProvider.java


import javax.script.Invocable;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
import java.io.FileNotFoundException;
import java.io.FileReader;

public class JavaScriptProvider {

    private static JSMethods loadJs(Class<JSMethods> clazz) throws FileNotFoundException, ScriptException {
        //创建一个脚本引擎管理器
        ScriptEngineManager manager = new ScriptEngineManager();
        //获取一个指定的名称的脚本管理器
        ScriptEngine engine = manager.getEngineByName("js");
        //获取js文件所在的目录的路径
        String jsName = Thread.currentThread().getClass().getResource("/").getPath() + "/readDemo.js";
        engine.eval(new FileReader(jsName));
        //从脚本引擎中返回一个给定接口的实现
        Invocable invocable = (Invocable) engine;
        return invocable.getInterface(clazz);
    }

    public static String getHeXinV() {
        String str = null;
        try {
            JavaScriptProvider jsProvider = new JavaScriptProvider();
            JSMethods jsMethods = jsProvider.loadJs(JSMethods.class);
            str = jsMethods.read();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (ScriptException e) {
            e.printStackTrace();
        } finally {
            return str;
        }

    }
}

JSMethods.java

public interface  JSMethods {

    String read();

}

JS文件方法 readDemo.js

function read(){

    var encrypt = new JSEncrypt();
    encrypt.setPublicKey("MIGfMcAuuFoVSwIDAQAB");
    alert(encrypt.encrypt("MA1GWYGC0M"));
}

readDemo.js 放到resources 中

Java第二种执行JS方式

File file = ResourceUtils.getFile("classpath:abc.js");
System.out.println("文件:" + file);
//转成string输入文本
String content = FileUtils.readFileToString(file, StandardCharsets.UTF_8);
executeJavaScript(content );

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