java里面运行js_在java中利用rhino执行javascript

以rhino中执行QQ邮箱的safeauth.js为例

js代码地址：/zh_CN/htmledition1127/js/safeauth.js

(1)导入相应类

import javax.script.ScriptEngine;

import javax.script.ScriptEngineManager;

import com.sun.phobos.script.javascript.RhinoScriptEngineFactory;

(2)解析JS

ScriptEngineManager engineManager = new ScriptEngineManager();

engineManager.registerEngineExtension("js", new RhinoScriptEngineFactory());

ScriptEngine engine = engineManager.getEngineByName("js");

InputStream ins = getClass().getResourceAsStream("/safeauth.js");

InputStreamReader insReader = new InputStreamReader(ins);

engine.eval(insReader);

会报错，说找不到window，navigator对象

这是因为rhino只提供了执行脚本的引擎环境，没有提供类似浏览器的host环境，所以当然找不到这两个对象

将相应的带有window,navigator的行注释掉，并加入以下代码，构成新的safeauth.js文件：

//-- encrypt password --//

function encryptPassword(pp, PublicKey, PublicTs) {

print("pp=" + pp + "\n");

print("PublicKey=" + PublicKey + "\n");

print("PublicTs=" + PublicTs + "\n");

var RSA = new RSAKey();

RSA.setPublic(PublicKey, "10001");

var Res = RSA.encrypt(pp + '\n' + PublicTs + '\n');

if (Res){

return hex2b64(Res);

} else {

return "EncodingPasswordError";

}

}

(3)执行JS：

engine.eval("var t=encryptPassword('" + pp + "','" + publicKey + "','" + publicTs + "');");

String p = engine.get("t").toString();

传入pp(密码域值),publicKey和publicTs(这两个值从/cgi-bin/loginpage页面内容得到)，即可以计算编码后的密码。