java读取js文件

最新推荐文章于 2025-01-13 10:27:17 发布

in_way

最新推荐文章于 2025-01-13 10:27:17 发布

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文章标签： java javascript

本文链接：https://blog.youkuaiyun.com/in_way/article/details/75042031

该博客展示了如何使用Java的ScriptEngine接口调用JavaScript代码，实现生成包含随机数和时间戳的URL参数。通过创建ScriptEngineManager和指定JavaScript引擎，然后定义并执行JavaScript函数，最终在Java中调用这个函数获取生成的URL字符串。

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/**
* 获取js中随机产生url参数的方法
* @author w
* @return
* @throws Exception
*/

public static String testScriptVariables() throws Exception {

ScriptEngineManager manager = new ScriptEngineManager();
ScriptEngine engine = manager.getEngineByName("javascript");
String res = null;
try {
String script = "function genT() {\n"
+ " var sig = \"\";\n"
+ " var chars = \"0123456789abcdef\";\n"
+ " if(true){\n"
+ " var curTime = parseInt(Math.random()*(9999-1000+1)+1000)+\"\"+Date.parse(new Date());\n"
+ " sig = chars.charAt(parseInt(Math.random()*(15-15+1)+10))+chars.charAt(curTime.length)+\"\"+curTime;\n"
+ " }else{\n"
+ " sig = __signature;\n"
+ " }\n"
+ "\n"
+ " var key = \"\";\n"
+ " var keyIndex = -1;\n"
+ " for(var i=0;i<6;i++){\n"
+ " var c=sig.charAt(keyIndex+1);\n"
+ " key +=c;\n"
+ " keyIndex = chars.indexOf(c);\n"
+ " if(keyIndex<0 || keyIndex>=sig.length){\n"
+ " keyIndex = i;\n"
+ " }\n"
+ " }\n"
+ "\n"
+ "\t\t\tvar curUrl='';\n"
+ " var timestamp = parseInt(Math.random()*(9999-1000+1)+1000)+\"_\"+key+\"_\"+Date.parse(new Date());\n"
+ " var t = timestamp;\n" + " t = t.replace(/\\+/g,\"_\");\n"
+ " curUrl+= \"?s=\" + sig;\n" + " curUrl+= \"&t=\" + t;\n"
+ "\t\t\treturn curUrl;\n" + " }";
engine.eval(script);
Invocable inv2 = (Invocable)engine;
res = (String)inv2.invokeFunction("genT");
System.out.println("当前结果为：" + res);
} catch (Exception e) {
e.printStackTrace();
}
return res;
}