{"id":3982,"date":"2018-06-13T08:40:21","date_gmt":"2018-06-13T00:40:21","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=3982"},"modified":"2018-06-13T08:40:21","modified_gmt":"2018-06-13T00:40:21","slug":"java%e4%b8%ad%e5%a6%82%e4%bd%95%e6%89%a7%e8%a1%8c%e7%b3%bb%e7%bb%9f%e5%91%bd%e4%bb%a4","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/3982.html","title":{"rendered":"Java\u4e2d\u5982\u4f55\u6267\u884c\u7cfb\u7edf\u547d\u4ee4"},"content":{"rendered":"

=Start=<\/p>\n

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\u5728\u5b66\u4e60Java\u7684\u8fc7\u7a0b\u4e2d\u4e0d\u65ad\u7528\u6587\u7ae0\u8fdb\u884c\u6574\u7406\u603b\u7ed3\uff08\u5e38\u7528\u529f\u80fd\u7684Java\u5b9e\u73b0\uff09\uff0c\u4e89\u53d6\u65e9\u65e5\u80fd\u8f83\u4e3a\u719f\u7ec3\u7684\u4f7f\u7528Java\u8fdb\u884c\u5f00\u53d1\u3002<\/p>\n

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\u5728Java\u4e2d\u6267\u884c\u7cfb\u7edf\u547d\u4ee4\u53ef\u4ee5\u4f7f\u7528 ProcessBuilder \u6216\u8005 Runtime.exec \u65b9\u6cd5\u3002<\/p>\n

package com.ixyzero.learn.misc;\r\n\r\nimport java.io.BufferedReader;\r\nimport java.io.InputStreamReader;\r\n\r\n\/**\r\n * Created by ixyzero on 2018\/6\/12.\r\n *\/\r\npublic class TestExecSystemCommand {\r\n    public static void main(String[] args) {\r\n        try {\r\n            String line = null;\r\n            String[] cmd = { \"\/bin\/sh\", \"-c\", \"ps aux | grep mysql\" }; \/\/\u8981\u6267\u884c\u7684\u547d\u4ee4\r\n            Process p = Runtime.getRuntime().exec(cmd);\r\n            BufferedReader in =\r\n                    new BufferedReader(new InputStreamReader(p.getInputStream()));\r\n            while ((line = in.readLine()) != null) {\r\n                System.out.println(line);\r\n            }\r\n            in.close();\r\n        } catch (Exception ex) {\r\n            ex.printStackTrace();\r\n        }\r\n\r\n    }\r\n}<\/pre>\n
\u4e0a\u9762\u8fd9\u79cd\u5e38\u89c4\u7684\u7b80\u5355\u65b9\u6cd5\u53ef\u80fd\u4f1ahang\u4f4fJVM\u3002\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\u662f\u56e0\u4e3ainputStream\u7f13\u51b2\u533a\u88ab\u585e\u6ee1\u5bfc\u81f4\u963b\u585e\uff0c\u76f4\u5230\u5b83\u88ab\u8bfb\u53d6\uff1b\u5c06 waitFor() \u65b9\u6cd5\u653e\u5728\u8bfb\u53d6 inputStream \u4e4b\u540e\u53ef\u4ee5\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u4f46\u524d\u63d0\u662ferrorStream\u6ca1\u6709\u88ab\u586b\u6ee1\u3002<\/p>\n
\u6240\u4ee5\uff0c\u6b63\u786e\u7684\u505a\u6cd5\u5c31\u662f\u2014\u2014\u65b0\u5efa2\u4e2a\u7ebf\u7a0b\u53bb\u5904\u7406inputStream\u548cerrorStream\u7f13\u51b2\u533a\uff0c\u7136\u540e\u518d\u8c03\u7528 waitFor() \u65b9\u6cd5\u3002<\/p>\n
package com.ixyzero.learn.misc;\r\n\r\nimport java.io.IOException;\r\nimport java.io.InputStream;\r\n\r\n\/**\r\n * Created by ixyzero on 2018\/6\/12.\r\n *\/\r\npublic class TestExecuteCmd {\r\n    public static void main(String[] args) {\r\n        executeCmd(\"ls -oa\"); \/\/ \u4e0d\u652f\u6301\u7ba1\u9053\u64cd\u4f5c\u7b26,\u56e0\u4e3a\u662f\u76f4\u63a5\u4ee5string\u7684\u5f62\u5f0f\u4f20\u7ed9exec\u65b9\u6cd5\u7684\r\n        System.out.println();\r\n\r\n        String[] cmd = { \"\/bin\/sh\", \"-c\", \"ps aux | grep mysql\" };\r\n        executeCmdArray(cmd);\r\n    }\r\n\r\n    private static void executeCmd(String string) {\r\n        try {\r\n            Process aProcess = Runtime.getRuntime().exec(string);\r\n\r\n            \/\/ These two thread shall stop by themself when the process end\r\n            Thread pipeThread = new Thread(new StreamReader(aProcess.getInputStream()));\r\n            Thread errorThread = new Thread(new StreamReader(aProcess.getErrorStream()));\r\n\r\n            pipeThread.start();\r\n            errorThread.start();\r\n\r\n            aProcess.waitFor();\r\n        } catch (IOException e) {\r\n            e.printStackTrace();\r\n        } catch (InterruptedException ie) {\r\n            ie.printStackTrace();\r\n        }\r\n    }\r\n\r\n    private static void executeCmdArray(String[] cmd) {\r\n        try {\r\n            Process aProcess = Runtime.getRuntime().exec(cmd);\r\n\r\n            \/\/ These two thread shall stop by themself when the process end\r\n            Thread pipeThread = new Thread(new StreamReader(aProcess.getInputStream()));\r\n            Thread errorThread = new Thread(new StreamReader(aProcess.getErrorStream()));\r\n\r\n            pipeThread.start();\r\n            errorThread.start();\r\n\r\n            aProcess.waitFor();\r\n        } catch (IOException e) {\r\n            e.printStackTrace();\r\n        } catch (InterruptedException ie) {\r\n            ie.printStackTrace();\r\n        }\r\n    }\r\n\r\n}\r\n\r\n\/\/Replace the following thread with your intends reader\r\nclass StreamReader implements Runnable {\r\n\r\n    private InputStream Pipe;\r\n\r\n    public StreamReader(InputStream pipe) {\r\n        if(pipe == null) {\r\n            throw new NullPointerException(\"bad pipe\");\r\n        }\r\n        Pipe = pipe;\r\n    }\r\n\r\n    public void run() {\r\n        try {\r\n            byte buffer[] = new byte[2048];\r\n\r\n            int read = Pipe.read(buffer);\r\n            while(read >= 0) {\r\n                System.out.write(buffer, 0, read);\r\n\r\n                read = Pipe.read(buffer);\r\n            }\r\n        } catch (IOException e) {\r\n            e.printStackTrace();\r\n        } finally {\r\n            if(Pipe != null) {\r\n                try {\r\n                    Pipe.close();\r\n                } catch (IOException e) {\r\n                }\r\n            }\r\n        }\r\n    }\r\n}<\/pre>\n
\u5982\u679c\u5e0c\u671b\u66f4\u7075\u6d3b\u7684\u83b7\u53d6\u6267\u884c\u547d\u4ee4\u7684\u8fd4\u56de\u503c\u3001\u8f93\u51fa\u3001\u9519\u8bef\u8f93\u51fa\u7b49\u4fe1\u606f\uff0c\u53ef\u4ee5\u53c2\u8003\u4e00\u4e0b\u300cJava exec – execute system processes with Java ProcessBuilder and Process<\/a>\u300d\u91cc\u9762\u7684\u57fa\u4e8e ProcessBuilder \u548c \u65b0\u5efa\u7ebf\u7a0b\u5904\u7406inputStream\u548cerrorStream\u7f13\u51b2\u533a \u7684\u65b9\u5f0f\u5b9e\u73b0\u7684\u7c7b\u3002<\/p>\n
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