关于java:使用Java实现一个JS脚本引擎

应用Java实现JS脚本引擎

我的项目地址

https://github.com/GitHub-Laz...

生成语法树 并输入格式化代码

示例代码

class Test{    public static void main(String[] args){        Top.init();        DocNode doc = Top.compile("let      a=1+2,b=3,c=\"string\",d=a*(b+c/2),func=function(){};");        System.out.println(doc);    }}

输入

let a = 1 + 2, b = 3, c = "string", d = a * (b + c / 2), func = function () {}

运行脚本

以下示例为运行快排算法（运行环境线程隔离）

js脚本

function sort(arr, i, j) {    if (i >= j) {        return;    }    let p = i, q = j;    let temp = arr[p];    while (p < q) {        while (p < q && arr[q] >= temp) {            q-=1;        }        arr[p] = arr[q];        while (p < q && arr[p] <= temp) {            p+=1;        }        arr[q] = arr[p];    }    arr[q] = temp;    sort(arr, i, q - 1);    sort(arr, q + 1, j);}let arr = [234, 57, 12, 123, 346, 1234, 2];sort(arr, 0, arr.length - 1);

示例代码

class Test{    public static void main(String[] args){        Top.init();        Top.eval("function sort(arr, i, j) {\n" +                "    if (i >= j) {\n" +                "        return;\n" +                "    }\n" +                "    let p = i, q = j;\n" +                "    let temp = arr[p];\n" +                "    while (p < q) {\n" +                "        while (p < q && arr[q] >= temp) {\n" +                "            q-=1;\n" +                "        }\n" +                "        arr[p] = arr[q];\n" +                "        while (p < q && arr[p] <= temp) {\n" +                "            p+=1;\n" +                "        }\n" +                "        arr[q] = arr[p];\n" +                "    }\n" +                "    arr[q] = temp;\n" +                "    sort(arr, i, q - 1);\n" +                "    sort(arr, q + 1, j);\n" +                "}\n" +                "\n" +                "let arr = [234, 57, 12, 123, 346, 1234, 2];\n" +                "\n" +                "sort(arr, 0, arr.length - 1);");        Top.loop();        System.out.println(Top.getThreadLocalTop().getMainContexts().getContexts().peek().toSimpleString());    }}

输入

arr: [2, 12, 57, 123, 234, 346, 1234]sort: [object Object]