修复javaInfo找不到的问题

javaInfo/LICENSE

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+MIT License
+
+Copyright (c) 2020 Corona Studio
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

javaInfo/README.md

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+# JavaSearcher
+
+提供了一个查找系统中java路径及其版本的方法
+
+| 操作系统    | 支持     |
+| ------- | ------ |
+| Windows | [ ✔ ]  |
+| Linux   | [ ✔ ]  |
+| MacOS   | [ ✔ ]  |
+
+

javaInfo/javaInfo.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "javaInfo", "javaInfo\javaInfo.csproj", "{50A9D36A-25F2-43F3-910E-DD6BEFA1C236}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{50A9D36A-25F2-43F3-910E-DD6BEFA1C236}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{50A9D36A-25F2-43F3-910E-DD6BEFA1C236}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{50A9D36A-25F2-43F3-910E-DD6BEFA1C236}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{50A9D36A-25F2-43F3-910E-DD6BEFA1C236}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal

javaInfo/javaInfo/Java.cs

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+using System.Diagnostics;
+using System.Text.RegularExpressions;
+
+namespace javaInfo;
+
+/// <summary>
+/// # Java，包含 Path 和 Version 属性
+/// </summary>
+public class Java
+{
+    public string Path { get; set; }
+    public string Version { get; set; }
+
+    public Java(string path)
+    {
+        Path = path;
+        Version = string.Empty;
+    }
+
+    public Java(string path, string version)
+    {
+        Path = path;
+        Version = version;
+    }
+}
+
+/// <summary>
+/// # JavaInfo 用于获得Java信息
+/// </summary>
+public class JavaInfo
+{
+    /// <summary>
+    /// ## 在终端执行 shell arg
+    /// </summary>
+    /// <param name="shell"></param>
+    /// <param name="arg"></param>
+    /// <returns></returns>
+    private static HashSet<Java> RunProcess(string shell, string arg)
+    {
+        var startInfo = new ProcessStartInfo(shell, arg)
+        {
+            WorkingDirectory = Directory.GetCurrentDirectory(),
+            UseShellExecute = false,
+            RedirectStandardInput = true,
+            RedirectStandardError = true,
+            RedirectStandardOutput = true,
+            CreateNoWindow = true,
+        };
+        var cmd = new Process
+        {
+            StartInfo = startInfo
+        };
+        cmd.Start();
+        if (cmd.HasExited)
+        {
+            cmd.Close();
+            return new HashSet<Java>();
+        }
+
+        var reader = cmd.StandardOutput.ReadToEnd();
+        var javas = new HashSet<Java>();
+        foreach (var i in reader.Split('\n'))
+        {
+            if (i.Replace("\r", string.Empty) == string.Empty)
+                continue;
+            javas.Add(new Java(i.Replace("\r", string.Empty)));
+        }
+
+        cmd.Close();
+        return javas;
+    }
+
+    /// <summary>
+    /// ## 寻找已安装的Java **多平台处理**
+    /// </summary>
+    /// <returns></returns>
+    private static HashSet<Java> SearchJava()
+    {
+        if (OperatingSystem.IsWindows())
+            return RunProcess("where.exe", "javaw.exe");
+
+        if (OperatingSystem.IsMacOS())
+            return MacJavas();
+
+        if (OperatingSystem.IsLinux())
+            return LinuxJavas();
+        //Unix系，仅返回环境变量的java路径
+        return RunProcess("which", "java");
+    }
+
+    /// <summary>
+    /// ## MacOS 的 Java查询
+    /// </summary>
+    /// <returns></returns>
+    private static HashSet<Java> MacJavas()
+    {
+        const string javaHomePath =  "/Library/Java/JavaVirtualMachines";
+        var javas = new HashSet<Java>();
+        foreach (var i in Directory.GetDirectories(javaHomePath))
+        {
+            if (!Directory.Exists(i + "/Contents/Home/bin"))
+                continue;
+            javas.Add(new Java(i + "/Contents/Home/bin/java"));
+        }
+        return javas;
+    }
+
+    /// <summary>
+    /// ## Linux 的 Java查询 **处理不同的发行版**
+    /// </summary>
+    /// <returns></returns>
+    private static HashSet<Java> LinuxJavas()
+    {
+        const string binPath = "/usr/bin/";
+        var jvmDirectory = string.Empty;
+        if (Directory.Exists("/usr/lib/jvm"))
+            jvmDirectory = "/usr/lib/jvm";
+        else if (Directory.Exists("/usr/lib64/jvm"))
+            jvmDirectory = "/usr/lib64/jvm";
+
+        if (jvmDirectory == string.Empty)
+            return new HashSet<Java>();
+        //Arch系 包管理器为 pacman
+        if (File.Exists(binPath + "pacman"))
+            return ArchJavas(Directory.GetDirectories(jvmDirectory));
+        //Debian系 包管理器为 apt
+        if (File.Exists(binPath + "apt"))
+            return DebianJavas(Directory.GetDirectories(jvmDirectory));
+        //Red hat系 包管理器为 yum/dnf
+        if (File.Exists(binPath + "yum") || File.Exists(binPath + "dnf"))
+            return RedHatJavas(Directory.GetDirectories(jvmDirectory));
+        //opensuse系 包管理器为 zypper
+        if (File.Exists(binPath + "zypper"))
+            return OpensuseJavas(Directory.GetDirectories(jvmDirectory));
+        //其他系，难精确查找，仅返回环境变量中的java路径
+        return RunProcess("which", "java");
+    }
+
+    /// <summary>
+    /// ### Arch系 Linux 的Java查询
+    /// </summary>
+    /// <param name="javaRootPaths"></param>
+    /// <returns></returns>
+    private static HashSet<Java> ArchJavas(string[] javaRootPaths)
+    {
+        var javas = new HashSet<Java>();
+        foreach (var i in javaRootPaths)
+        {
+            if (i.Contains("default"))
+                continue;
+            if (Directory.Exists(i+"/bin"))
+                javas.Add(new Java(i + "/bin/java"));
+        }
+        return javas;
+    }
+
+    /// <summary>
+    /// ### Debian系 Linux 的Java查询
+    /// </summary>
+    /// <param name="javaRootPaths"></param>
+    /// <returns></returns>
+    private static HashSet<Java> DebianJavas(string[] javaRootPaths)
+    {
+        var javas = new HashSet<Java>();
+        foreach (var i in javaRootPaths)
+        {
+            if (!Directory.Exists(i+"/bin"))
+                continue;
+            javas.Add(new Java(i + "/bin/java"));
+        }
+
+        return javas;
+    }
+
+    /// <summary>
+    /// ### 红帽系 Linux 的Java查询
+    /// </summary>
+    /// <param name="javaRootPaths"></param>
+    /// <returns></returns>
+    private static HashSet<Java> RedHatJavas(string[] javaRootPaths)
+    {
+        var javas = new HashSet<Java>();
+        foreach (var i in javaRootPaths)
+        {
+            if (i.Contains("jre"))
+                continue;
+            if (Directory.Exists(i+"/bin"))
+                javas.Add(new Java(i + "/bin/java"));
+        }
+        return javas;
+    }
+
+    /// <summary>
+    /// ### OpenSuse Linux 的Java查询
+    /// </summary>
+    /// <param name="javaRootPaths"></param>
+    /// <returns></returns>
+    private static HashSet<Java> OpensuseJavas(string[] javaRootPaths)
+    {
+        var javas = new HashSet<Java>();
+        foreach (var i in javaRootPaths)
+        {
+            if (i.Contains("jre"))
+                continue;
+            if (Directory.Exists(i+"/bin"))
+                javas.Add(new Java(i + "/bin/java"));
+        }
+        return javas;
+    }
+
+    /// <summary>
+    /// ## 通过读 java 根目录下的 release 文件来获得版本信息
+    /// </summary>
+    /// <param name="path"></param>
+    /// <returns></returns>
+    private static string FindJavaVersion(string path)
+    {
+        if (!File.Exists(Path.GetFullPath(path)))
+            //不存在release文件时，使用 `java -version`命令查看版本
+            return FindJavaVersionInCmd(path);
+        try
+        {
+            var sr = new StreamReader(Path.GetFullPath(path));
+            return ReadRelease(sr,path);
+        }
+        catch (Exception)
+        {
+            return "Cannot Open Release File!";
+        }
+    }
+
+    /// <summary>
+    /// ## 通过 java -version 来获得版本信息
+    /// 注意！如果用 `cmd.StandardOutput.ReadToEnd()` 则会返回空字符串
+    /// 因此！应该使用 `cmd.StandardError.ReadToEnd()`
+    /// 奇怪的特性
+    /// </summary>
+    /// <param name="path"></param>
+    /// <returns></returns>
+    private static string FindJavaVersionInCmd(string path)
+    {
+        string javaPath;
+        if (OperatingSystem.IsWindows())
+            javaPath = path.Replace("release",@"bin\java.exe");
+        else
+            javaPath = path.Replace("release", "bin/java");
+        var cmd = RunJavaVersionCommand(javaPath);
+        cmd.Start();
+        var versionText = cmd.StandardError.ReadToEnd();
+        cmd.Close();
+        //使用正则表达式来提取 “” 中的内容，并且删除双引号
+        return Regex.Match(versionText, "[\"].*?[\"]").ToString().Replace("\"",string.Empty);
+    }
+
+    /// <summary>
+    /// 运行 java -version 命令并返回结果
+    /// </summary>
+    /// <param name="javaPath"></param>
+    /// <returns></returns>
+    private static Process RunJavaVersionCommand(string javaPath)
+    {
+        var startInfo = new ProcessStartInfo(javaPath, "-version")
+        {
+            WorkingDirectory = Directory.GetCurrentDirectory(),
+            UseShellExecute = false,
+            RedirectStandardInput = true,
+            RedirectStandardError = true,
+            RedirectStandardOutput = true,
+            CreateNoWindow = true,
+        };
+        return new Process{
+            StartInfo = startInfo
+        };
+    }
+
+    /// <summary>
+    /// ## 读取 Release 文件
+    /// 若读取错误则使用java -version命令读取
+    /// </summary>
+    /// <param name="sr"></param>
+    /// <param name="path"></param>
+    /// <returns></returns>
+    private static string ReadRelease(StreamReader sr, string path)
+    {
+        while (!sr.EndOfStream)
+        {
+            var versionText = sr.ReadLine();
+            if (versionText == null)
+            {
+                sr.Close();
+                return "Unknow Version";
+            }
+
+            if (versionText.Contains("JAVA_VERSION="))
+            {
+                sr.Close();
+                return versionText.Replace("JAVA_VERSION=", string.Empty).Replace("\"", string.Empty);
+            }
+        }
+        //读取错误时
+        sr.Close();
+        return FindJavaVersionInCmd(path);
+    }
+
+    /// <summary>
+    /// ## 寻找并设置好现有 java 的版本
+    /// </summary>
+    /// <param name="javas"></param>
+    /// <returns></returns>
+    private static HashSet<Java> SetJavaVersion(HashSet<Java> javas)
+    {
+        var res = new HashSet<Java>();
+        foreach (var i in javas)
+        {
+            string javaReleasePath;
+            if (OperatingSystem.IsWindows())
+                javaReleasePath = i.Path.Replace(@"bin\javaw.exe", "release");
+            else
+                javaReleasePath = i.Path.Replace("bin/java", "release");
+            res.Add(new Java(i.Path, FindJavaVersion(javaReleasePath)));
+        }
+
+        return res;
+    }
+
+    /// <summary>
+    /// # 寻找 Java及其版本
+    /// </summary>
+    /// <returns></returns>
+    public static HashSet<Java> FindJava()
+    {
+        return SetJavaVersion(SearchJava());
+    }
+}