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）：     

     <script src="http://cdn.bootcss.com/ace/1.2.4/ace.js"></script>
     <script src="http://cdn.bootcss.com/ace/1.2.4/ext-language_tools.js"></script>

        本地js引入举例：     

     <script src="/codemirror/src-noconflict/ace.js"></script>
 

<template>
  <div class="Ace">
    <div class="code_tool_bar">
      <span style="position: relative;left: 10px; top: 16px; font-size: 18px;">这个要比我写的样式要好（复制别人的）</span>
      <el-button icon="el-icon-s-tools" @click="dialogTableVisible = true" style="float: right;margin: 10px;"></el-button>
      <el-button icon="el-icon-refresh" @click="refresh_code" style="float: right; margin: 10px;"></el-button>
      <el-select v-model="selectLanguageValue" @change="changSelectValue1" filterable style="float: right;margin: 10px;">
        <el-option
          v-for="item in languagesOptions"
          :key="item.label"
          :label="item.label"
          :value="item.value">
        </el-option>
      </el-select>
      <el-dialog :visible.sync="dialogTableVisible"
                 :append-to-body="true"
                 top="40px"
                 width="39.194%"
                 :destroy-on-close="true"
                 :show-close="false"
                 custom-class="code-editor-config-dialog">
        <el-card style="margin: -59px -20px 0 -20px;"
                 shadow="never">
          <div slot="header" class="clearfix">
            <span>代码编辑器设置</span>
            <el-button style="float: right; padding: 3px 0" type="text" @click="dialogTableVisible = false">x</el-button>
          </div>
          <div class="row">
            <el-row>
              <el-col :span="16">
                <div class="code-editor-option-title">主题</div>
                <div class="code-editor-option-description">对白色界面感到厌倦了吗？可以尝试其他的背景和代码高亮风格。</div>
              </el-col>
              <el-col :span="8">
                <el-select v-model="selectThemeValue"
                           @change="changSelectValue"
                           filterable>
                  <el-option
                    v-for="item in themesOptions"
                    :key="item.value"
                    :label="item.label"
                    :value="item.value">
                  </el-option>
                </el-select>
              </el-col>
            </el-row>
            <hr>
          </div>
          <div class="row">
            <el-row>
              <el-col :span="16">
                <div class="code-editor-option-title">编辑类型</div>
                <div class="code-editor-option-description">更喜欢Vim或者Emacs的输入方式吗？我们也为你提供了这些选项。</div>
              </el-col>
              <el-col :span="8">
                <el-select v-model="selectEditorValue"
                           @change="setEditorMode"
                           filterable>
                  <el-option
                    v-for="item in editorOption"
                    :key="item.value"
                    :label="item.label"
                    :value="item.value">
                  </el-option>
                </el-select>
              </el-col>
            </el-row>
            <hr>
          </div>
          <div class="row">
            <el-row>
              <el-col :span="16">
                <div class="code-editor-option-title">缩进长度</div>
                <div class="code-editor-option-description">选择代码缩进的长度。默认是4个空格。</div>
              </el-col>
              <el-col :span="8">
                <el-select v-model="selectTabValue"
                           @change="setTabSize"
                           filterable>
                  <el-option
                    v-for="item in tabOption"
                    :key="item.value"
                    :label="item.label"
                    :value="item.value">
                  </el-option>
                </el-select>
              </el-col>
            </el-row>
            <hr>
          </div>
          <div class="row">
            <el-row>
              <el-col :span="16">
                <div class="code-editor-option-title">主题</div>
                <div class="code-editor-option-description">对白色界面感到厌倦了吗？可以尝试其他的背景和代码高亮风格。</div>
              </el-col>
              <el-col :span="8">
                <el-select v-model="selectThemeValue"
                           @change="changSelectValue"
                           filterable>
                  <el-option
                    v-for="item in themesOptions"
                    :key="item.value"
                    :label="item.label"
                    :value="item.value">
                  </el-option>
                </el-select>
              </el-col>
            </el-row>
          </div>
        </el-card>
        <el-button @click="dialogTableVisible = false" style="margin: 20px 480px -12px 480px">确 定</el-button>
      </el-dialog>
    </div>
    <div ref="ace" class="ace"></div>
    <el-button class="submitBtn" round type="success" ><i class="fa fa-cloud-upload" aria-hidden="true"></i>提交代码</el-button>
    <el-button class="debuggerBtn" round @click="debuggerCode" ><i class="fa fa-play-circle-o" aria-hidden="true"></i>调试代码</el-button>
  </div>
</template>

<script>
import ace from 'ace-builds'
import 'ace-builds/webpack-resolver'; // 在 webpack 环境中使用必须要导入
//解决添加提示时控制台警告(提示必须引入的包)
import "ace-builds/src-noconflict/ext-language_tools"
import "ace-builds/src-noconflict/ext-emmet"
//语言提示
import 'ace-builds/src-noconflict/snippets/javascript'
import 'ace-builds/src-noconflict/snippets/c_cpp'
import 'ace-builds/src-noconflict/snippets/java'
import 'ace-builds/src-noconflict/snippets/golang'
import 'ace-builds/src-noconflict/snippets/python'
//输入类型
import 'ace-builds/src-noconflict/keybinding-emacs'
import 'ace-builds/src-noconflict/keybinding-vim'
import 'ace-builds/src-noconflict/keybinding-vscode'

export default {
  name: 'CodeEditor',
  props: {
    value: {
      type: String,
      required: true
    }
  },
  methods: {
    changSelectValue(value) {
      this.aceEditor.setTheme(`ace/theme/${value}`);
    },
    refresh_code() {
      this.aceEditor.session.setValue('');
    },
    changSelectValue1(value) {
      this.aceEditor.session.setMode(`ace/mode/${value}`);
    },
    debuggerCode() {
      let value = this.aceEditor.session.getValue();
      console.log(value);
    },
    setTabSize(size) {
      this.aceEditor.session.setTabSize(size);
    },
    setEditorMode(value) {
      this.aceEditor.setKeyboardHandler(`ace/keyboard/${value}`);
    }
  },
  data() {
    return {
      dialogTableVisible: false,
      themeValue: 'ambiance',
      aceEditor: null,
      themePath: 'ace/theme/monokai', // 不导入 webpack-resolver，该模块路径会报错
      modePath: 'ace/mode/c_cpp', // 同上
      codeValue: this.value || '',
      editorOption:[{
        value: 'vscode',
        label: 'Standard'
      },{
        value: 'vim',
        label: 'Vim'
      },{
        value: 'emacs',
        label: 'Emacs'
      }],
      selectEditorValue: 'Standard',
      tabOption:[{
        value: '2',
        label: '2个空格'
      },{
        value: '4',
        label: '4个空格'
      },{
        value: '6',
        label: '6个空格'
      }],
      selectTabValue: '4个空格',
      themesOptions: [{
        value: 'crimson_editor',
        label: 'CrimsonEditor'
      },{
        value: 'monokai',
        label: 'Monokai'
      },{
        value: 'terminal',
        label: 'Terminal'
      },{
        value: 'xcode',
        label: 'Xcode'
      }],
      selectThemeValue: 'Monokai',
      languagesOptions: [{
        value: 'c_cpp',
        label: 'C++'
      },{
        value: 'c_cpp',
        label: 'C'
      },{
        value: 'java',
        label: 'Java'
      },{
        value: 'golang',
        label: 'Golang'
      },{
        value: 'python',
        label: 'Python'
      },{
        value: 'javascript',
        label: 'Javascript'
      }],
      selectLanguageValue: 'C++'
    };
  },
  mounted() {
    this.aceEditor = ace.edit(this.$refs.ace,{
      maxLines: 1000, // 最大行数，超过会自动出现滚动条
      minLines: 22, // 最小行数，还未到最大行数时，编辑器会自动伸缩大小
      fontSize: 14, // 编辑器内字体大小
      theme: this.themePath, // 默认设置的主题
      mode: this.modePath, // 默认设置的语言模式
      tabSize: 4, // 制表符设置为 4 个空格大小
      readOnly: false, //只读
      highlightActiveLine: true,
      value: this.codeValue
    });
    this.aceEditor.setOptions({
      enableSnippets: true,
      enableLiveAutocompletion: true,
      enableBasicAutocompletion: true
    });
    // 快捷键
    // this.aceEditor.commands.addCommand({
    //   name: 'myCommand',
    //   bindKey: {win: 'Ctrl-M',  mac: 'Command-M'},
    //   exec: function(editor) {
    //     //...
    //   },
    //   readOnly: true // false if this command should not apply in readOnly mode
    // });
  },
  watch: {
    value(newVal) {
      console.log(newVal);
      this.aceEditor.setValue(newVal);
    }
  }
};
</script>

<style scoped lang="scss">
.code_tool_bar {
  height: 60px;
  width: 100%;
  background: #f8f9fa;
  border: 1px solid #c2c7d0;
  margin-bottom: 0;
}

.code-editor-option-title {
  font-size: 17px;
  margin-bottom: 10px;
}

.code-editor-option-description {
  font-size: 13px;
  color: grey;
}

hr {
  background: none !important;
  height: 1px !important;
  border: 0 !important;
  border-top: 1px solid #eee !important;
  margin-top: 20px;
  margin-bottom: 20px;
}

.ace {
  position: relative !important;
  border: 1px solid lightgray;
  margin: auto;
  height: auto;
  width: 100%;
}
.debuggerBtn {
  float: right;
  margin: 13px 20px 0 0;
}
.submitBtn {
  float: right;
  margin: 13px 0 0 0;
}
</style>

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：
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