记一次OJ在线代码编辑器（代码编译+运行，C、C++、Java）
如何在SpringBoot+Vue的项目中实现在线代码编译及执行（支持编译运行C、C++、Java），研究了一天，真实能用，下面直接上源码！！！
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一、后端（直接接收字符串进行代码编译）
（1）C编译执行方法（直接调用，传入字符串即可完成编译）
package complier.complier_c;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.nio.charset.Charset;
import complier.util.FileUtil;
/**
* C编译器
* @author tpw
*
*/
public class CComplier {
private final static String CplusplusFILEPATH=System.getProperty("user.dir") + "\\cCode\\";
private final static String CplusplusFILENAME="main.c";
private final static String CplusplusEXE="main.exe";
private String inputData; //输入数据
private String outputData; //输出数据
private String errorMsg; //程序错误信息
public CComplier() {
this.inputData="";
this.errorMsg="";
}
public CComplier(String inputData) {
super();
this.inputData = inputData;
this.errorMsg="";
}
public CComplier(String inputData, String outputData, String errorMsg) {
super();
this.inputData = inputData;
this.outputData = outputData;
this.errorMsg = errorMsg;
}
public void complier() {
// 这里调用执行写入工具类，其他两个好像没写，这里给出个demo
FileUtil.writeFile(inputData,CplusplusFILEPATH+CplusplusFILENAME);
// 进入c代码存放文件夹
// 使用gcc命令来编译c文件,来生成一个exe文件
// 直接运行exe文件
// cmd命令：cd /d d:\javaworkspace\complier\cCode
// cmd命令：gcc main.cpp
// cmd命令：main.exe
StringBuffer errorInfo = new StringBuffer();
Process p=null;
try {
//1.编译C++文件
p = Runtime.getRuntime().exec("gcc "+CplusplusFILEPATH+CplusplusFILENAME+" -o "+CplusplusFILEPATH+"main");
// 获取进程的错误流
final InputStream is1 = p.getErrorStream();
// 开一个线程,读标准错误流
new Thread() {
public void run() {
try {
BufferedReader br1 = new BufferedReader(new InputStreamReader(is1,Charset.forName("GBK")));
String line1 = null;
while ((line1 = br1.readLine()) != null) {
if (line1 != null) {
errorInfo.append(line1 + "\n");
}
}
if(!errorInfo.toString().equals("")) {
errorMsg=errorInfo.toString();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is1.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}.start();
p.waitFor();
p.destroy();
//2.如果没错的话就运行exe文件
if (errorInfo.toString().equals("")) {
try {
Process process = Runtime.getRuntime().exec(CplusplusFILEPATH+CplusplusEXE);
BufferedWriter bout = new BufferedWriter(new OutputStreamWriter(process.getOutputStream()));
bout.write(this.inputData);
bout.close();
BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream(),Charset.forName("GBK")));
String line = null;
StringBuffer b = new StringBuffer();
while ((line = br.readLine()) != null) {
b.append(line + "\n");
}
this.outputData=b.toString();
} catch (IOException e) {
e.printStackTrace();
}
}
} catch (Exception e) {
try {
p.getErrorStream().close();
p.getInputStream().close();
p.getOutputStream().close();
} catch (Exception ee) {
ee.printStackTrace();
}
}
}
public String getInputData() {
return inputData;
}
public void setInputData(String inputData) {
this.inputData = inputData;
}
public String getOutputData() {
return outputData;
}
public void setOutputData(String outputData) {
this.outputData = outputData;
}
public String getErrorMsg() {
return errorMsg;
}
public void setErrorMsg(String errorMsg) {
this.errorMsg = errorMsg;
}
}
（2）C++编译执行方法（直接调用，传入字符串即可完成编译）
package complier.complier_cplusplus;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.nio.charset.Charset;
/**
* C++编译器
* @author tpw
*
*/
public class CplusplusComplier {
private final static String CplusplusFILEPATH=System.getProperty("user.dir") + "\\c++Code\\";
private final static String CplusplusFILENAME="main.cpp";
private final static String CplusplusEXE="main.exe";
private String inputData; //输入数据
private String outputData; //输出数据
private String errorMsg; //程序错误信息
public CplusplusComplier() {
this.inputData="";
this.errorMsg="";
}
public CplusplusComplier(String inputData) {
super();
this.inputData = inputData;
this.errorMsg="";
}
public CplusplusComplier(String inputData, String outputData, String errorMsg) {
super();
this.inputData = inputData;
this.outputData = outputData;
this.errorMsg = errorMsg;
}
public void complier() {
// 进入c++代码存放文件夹
// 使用g++命令来编译c++文件,来生成一个exe文件
// 直接运行exe文件
// cmd命令：cd /d d:\javaworkspace\complier\c++Code
// cmd命令：g++ main.cpp
// cmd命令：main.exe
StringBuffer errorInfo = new StringBuffer();
Process p=null;
try {
//1.编译C++文件
p = Runtime.getRuntime().exec("g++ "+CplusplusFILEPATH+CplusplusFILENAME+" -o "+CplusplusFILEPATH+"main");
// 获取进程的错误流
final InputStream is1 = p.getErrorStream();
// 开一个线程,读标准错误流
new Thread() {
public void run() {
try {
BufferedReader br1 = new BufferedReader(new InputStreamReader(is1,Charset.forName("GBK")));
String line1 = null;
while ((line1 = br1.readLine()) != null) {
if (line1 != null) {
errorInfo.append(line1 + "\n");
}
}
if(!errorInfo.toString().equals("")) {
errorMsg=errorInfo.toString();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is1.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}.start();
p.waitFor();
p.destroy();
//2.如果没错的话就运行exe文件
if (errorInfo.toString().equals("")) {
try {
Process process = Runtime.getRuntime().exec(CplusplusFILEPATH+CplusplusEXE);
BufferedWriter bout = new BufferedWriter(new OutputStreamWriter(process.getOutputStream()));
bout.write(this.inputData);
bout.close();
BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream(),Charset.forName("GBK")));
String line = null;
StringBuffer b = new StringBuffer();
while ((line = br.readLine()) != null) {
b.append(line + "\n");
}
this.outputData=b.toString();
} catch (IOException e) {
e.printStackTrace();
}
}
} catch (Exception e) {
try {
p.getErrorStream().close();
p.getInputStream().close();
p.getOutputStream().close();
} catch (Exception ee) {
ee.printStackTrace();
}
}
}
public String getInputData() {
return inputData;
}
public void setInputData(String inputData) {
this.inputData = inputData;
}
public String getOutputData() {
return outputData;
}
public void setOutputData(String outputData) {
this.outputData = outputData;
}
public String getErrorMsg() {
return errorMsg;
}
public void setErrorMsg(String errorMsg) {
this.errorMsg = errorMsg;
}
}
（3）Java编译执行方法（直接调用，传入字符串即可完成编译）
package complier.complier_java;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.nio.charset.Charset;
/**
* java编译器
* @author tpw
*
*/
public class JavaComplier {
private final static String jAVAFILEPATH=System.getProperty("user.dir") + "\\javaCode";
private final static String JAVAFILENAME="Main.java";
private final static String jAVAFILECLASNAME="Main";
private String inputData; //输入数据
private String outputData; //输出数据
private String errorMsg; //程序错误信息
public JavaComplier() {
this.inputData="";
this.errorMsg="";
}
public JavaComplier(String inputData) {
super();
this.inputData = inputData;
this.errorMsg="";
}
public JavaComplier(String inputData, String outputData, String errorMsg) {
super();
this.inputData = inputData;
this.outputData = outputData;
this.errorMsg = errorMsg;
}
public void complier() {
// 进入java代码存放文件夹
// 使用javac命令来编译java文件,来生成一个class文件
// 使用java命令来运行类
// cmd命令：cd /d d:\javaworkspace\complier\javaCode
// cmd命令：javac Main.java
// cmd命令：java Main
StringBuffer errorInfo = new StringBuffer();
Process p=null;
try {
//1.编译java文件
p = Runtime.getRuntime().exec("javac "+JAVAFILENAME, null, new File(jAVAFILEPATH));
// 获取进程的错误流
final InputStream is1 = p.getErrorStream();
// 开一个线程,读标准错误流
new Thread() {
public void run() {
try {
BufferedReader br1 = new BufferedReader(new InputStreamReader(is1,Charset.forName("GBK")));
String line1 = null;
while ((line1 = br1.readLine()) != null) {
if (line1 != null) {
errorInfo.append(line1 + "\n");
}
}
if(!errorInfo.toString().equals("")) {
errorMsg=errorInfo.toString();
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is1.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}.start();
p.waitFor();
p.destroy();
//2.如果没错的话就运行java文件
if (errorInfo.toString().equals("")) {
try {
Process process = Runtime.getRuntime().exec("java "+jAVAFILECLASNAME, null, new File(jAVAFILEPATH));
BufferedWriter bout = new BufferedWriter(new OutputStreamWriter(process.getOutputStream()));
bout.write(this.inputData);
bout.close();
BufferedReader br = new BufferedReader(new InputStreamReader(process.getInputStream(),Charset.forName("GBK")));
String line = null;
StringBuffer b = new StringBuffer();
while ((line = br.readLine()) != null) {
b.append(line + "\n");
}
this.outputData=b.toString();
} catch (IOException e) {
e.printStackTrace();
}
}
} catch (Exception e) {
try {
p.getErrorStream().close();
p.getInputStream().close();
p.getOutputStream().close();
} catch (Exception ee) {
ee.printStackTrace();
}
}
}
public String getInputData() {
return inputData;
}
public void setInputData(String inputData) {
this.inputData = inputData;
}
public String getOutputData() {
return outputData;
}
public void setOutputData(String outputData) {
this.outputData = outputData;
}
public String getErrorMsg() {
return errorMsg;
}
public void setErrorMsg(String errorMsg) {
this.errorMsg = errorMsg;
}
}
（4）字符串写入工具类（直接调用，传入字符串即可完成写入）
package complier.util;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
public class FileUtil {
public static void writeFile(String content,String filePath) {
try {
BufferedWriter out = new BufferedWriter(new FileWriter(filePath));
out.write(content);
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
（5）测试调用Demo
package complier.complier_java;
public class Test {
public static void main(String[] args) {
// 这里调用的Java编译，其他类同
JavaComplier javaComplier=new JavaComplier("Hello!!");
javaComplier.complier();
String proError=javaComplier.getErrorMsg();
if(!proError.equals("")) {
System.err.println(proError);
}else {
System.out.println(javaComplier.getOutputData());
}
}
}
二、前端（输入字符串，简单的直接输入框，复杂点就用ACE插件或者其他，此案例使用的ACE）
js引入方式可以采取以下方式，推荐本地下载包引入：
在线js引入举例（这两个是可以用的）：
本地js引入举例：
提交代码
调试代码
效果截图 ：
三、编译执行代码还需要在项目的src同级目录下创建对应的编译文件夹，用于接收字符串写入并执行。下面放出目录截图，直接用记事本创建并更改扩展名即可，文件里面的内容都是空的。
四、此项目总体截图
输入代码（C）：
代码执行结果：