用超简单的python代码实现Java在线编译器
原理参照python在线编译器实现代码注释很多,直接上代码目录结构:OnlineEXEC|----zxby.py|----test.bat(因为测试环境是windows,linux可以自行改成shell)|----app |----flaskrun.pyzxby.py代码实现:# -*- coding: utf-8 -*-#__a
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原理参照python在线编译器实现
代码注释很多,直接上代码
目录结构:
OnlineEXEC
|----zxby.py
|----test.bat(因为测试环境是windows,linux可以自行改成shell)
|----app
|----flaskrun.py
zxby.py代码实现:
# -*- coding: utf-8 -*-
#__author__="ZJL"
import os,subprocess,tempfile
# 创建临时文件夹,返回临时文件夹路径
TempFile = tempfile.mkdtemp(suffix='_test', prefix='java_')
# javac 和 Java 编译器位置
JAVAC_EXEC = "C:\java\jdk1.8.0_121\\bin\javac"
JAVA_EXEC = "C:\java\jdk1.8.0_121\\bin\java"
# 获得java文件名
def get_javaname(code):
if code:
if "public class" in code and "{" in code:
FileName = code.split("public class ")[1].split("{")[0].strip()
else:
FileName = "test"
return FileName
# 接收代码写入文件
def write_file(jname, code):
fpath = os.path.join(TempFile, '%s.java' % jname)
with open(fpath, 'w', encoding='utf-8') as f:
f.write(code)
print('file path: %s' % fpath)
return fpath
# 编码
def decode(s):
try:
return s.decode('utf-8')
except UnicodeDecodeError:
return s.decode('gbk')
# 主执行函数
def main(code):
r = dict()
jname = get_javaname(code)
fpath = write_file(jname, code)
try:
# subprocess.check_output 是 父进程等待子进程完成,返回子进程向标准输出的输出结果
# stderr是标准输出的类型
# 编译Java代码
outdata = decode(subprocess.check_output([JAVAC_EXEC, fpath], stderr=subprocess.STDOUT, timeout=5))
except subprocess.CalledProcessError as e:
# e.output是错误信息标准输出
# 错误返回的数据
r["code"] = 'Error'
r["output"] = decode(e.output)
return r
else:
# 执行Java代码
# 因为调用原因,bat写绝对路径
outdata = decode(subprocess.check_output(["D:\\PycharmProjects\\zxbyqjava\\test.bat", TempFile,JAVA_EXEC,jname], stderr=subprocess.STDOUT, timeout=5))
# 成功返回的数据
r['output'] = outdata
r["code"]="Success"
return r
# if __name__ == '__main__':
# code ="""public class hello {public static void main(String []args) {System.out.println("Hello World");}}"""
# print(main(code))
test.bat代码实现(这个脚本的作用是解决classpath路径执行的问题):
@echo off
C:
cd %1
%2 %3
flaskrun.py代码实现:
# -*- coding: utf-8 -*-
#__author__="ZJL"
from flask import Flask
from flask import request
from flask import Response
import json
import zxby
app = Flask(__name__)
def Response_headers(content):
resp = Response(content)
resp.headers['Access-Control-Allow-Origin'] = '*'
return resp
@app.route('/')
def hello_world():
return Response_headers('hello world!!!')
@app.route('/run',methods=['POST'])
def run():
if request.method == 'POST' and request.form['code']:
code = request.form['code']
jsondata = zxby.main(code)
return Response_headers(str(jsondata))
@app.errorhandler(403)
def page_not_found(error):
content = json.dumps({"error_code": "403"})
resp = Response_headers(content)
return resp
@app.errorhandler(404)
def page_not_found(error):
content = json.dumps({"error_code": "404"})
resp = Response_headers(content)
return resp
@app.errorhandler(400)
def page_not_found(error):
content = json.dumps({"error_code": "400"})
resp = Response_headers(content)
return resp
@app.errorhandler(405)
def page_not_found(error):
content = json.dumps({"error_code": "405"})
resp = Response_headers(content)
return resp
@app.errorhandler(410)
def page_not_found(error):
content = json.dumps({"error_code": "410"})
resp = Response_headers(content)
return resp
@app.errorhandler(500)
def page_not_found(error):
content = json.dumps({"error_code": "500"})
resp = Response_headers(content)
return resp
if __name__ == '__main__':
app.run(debug=True)
打开postman测试:
成功测试:
错误测试;
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