Java用System读取系统相关信息、环境变量——（六）
package Java_Test;
public class System1 {
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println(System.getProperty("java.version"));
System.out.println(System.getProperty("java.vendor"));
System.out.println(System.getProperty("java.home"));
System.out.println(System.getProperty("java.library.path"));
System.out.println(System.getProperty("user.dir")); //获取当前类工作目录
System.out.println(System.getProperty("os.version"));
System.out.println(System.getProperty("os.name"));
System.out.println(System.getenv("path"));
}
}
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rHH38UqrfKysqNGzfapnD79u3Zs2d/8cUXGRkZGRkZ6enpycnJ5M/Zs2er109Pnjw5atTIUaNG7tzZv+yYlpY2ZcqUrKysrKysNWvWfPTRR4WFUlWkFhOHDuTdb+25cf9Z3b3Ourud1+90XLvTcbWxvei7suxsb15envWARXZ2dn299C1r16o2le/51ZlD75z9btzZ78b9dPidir3/r/biTkuaLPYWZm87tmrT4VWbDi/KltoZsOT63Y7bD7uv19WWF3z86t7O1w8Km6qyftw2sWrXpOo9U89+89GdcztkiViqq7XzVSCMX7i/vLz85MmTJSUlxcXFpaWlFRUVly9fZt72IlRvTDrZheVrd55cs6Nk9TfFa74t9e6pKCi+fOjnFqfq7XBRDqPeHne+KP/pLLnlcFGOOhEzqu97S1m6KW351vlfbhGGz5ds+ocp2551PSfD1bzRRnIxs/FZV13uaGPm8eAWX7IxOq+OPf7ahtHGLB9xjGFYsWyjswcoQkC6Wf8zDzEIo7S0CtTPmauXNx/es+Xoni1H95Q1nDNNM3tjlWma24rOn6i/ZYVtRYJp8ACkDuNnyLit1pRbYMZNM1Z/zPx8TMIBAIYdW7duPXfu3Dciqqur8/Kk9+AHyMrKSk1NTU9PT09PX7BgQXJy8tGjR5OSkubPn29tnD9/fkpKijqRly9fBj7VcPDgwYkTJ2ZkZKwcIC0tbfz48bW1tTIDFCkf2LfpbsvLr3ZVriz4YXHuidSs75KWFd1teXm35eWmrdtXrly5du3aFStWnDp1SpFI8eb/3XG7oP3WlkB46t9Ukv9/LCGSllUYeFvvvNVS9RawZHHuiaMV9XdbXl6/duWHbR+/urfz4oGk5iatEchSXeR9aeMX7q+srKysrKyqqrp8+XJjY+OTJ0+6u7t7e6mpJaF6Y9LJK6rMK6rceKiqoPjynjONh39+Unyt++TNXqfqbe/ejYx6s8LZi5cC/+/da39hEEX1luD55lefbv/Vp9t/9em2/zsQfvXptoGN35ypudPd/YIOJcmGYSSXDPy8sWH0rOLuF9c3vGWM3njd2nh942jjrQ3XX3Rb2wMHX9842phV3H1jw4b+LcXJxugNN7o1olMHFM9KLn7BGdYfLLlm/UNuMU0zsIUJbU+lH0JZsz44Z561odo0zWs3HxX8qfLrfWcL9p0t/ZG51iFXO+nlTu5BVF6HNZbnFxUVUbe42cRqr6mhV1sBAGA4sXXr1urq6osiNJ9a8Hq9s2fPXrBgwbx585KSki5cuGCapt/vnzFjRkpKyoIFC1JSUubMmaNpz4EDB8aPH79o0aJly5alpaVNmDDB+n/u3Lnvv/++8M0jajGxb8+Wxscvr93tvHqno7ax/UpD++VbTxsfvzx24kzGsi9XrFixdOnSFStWZGZm3rvH38kzYNXyXzZfWNp0/ouqA/+63zu66fwXTee/OLD8l5YQmZNZGHhb76zlUvUWsKS2sb3+QVfj45eNj1/6b9Se2f7Hso3vNTdpfbIo8LQBGfx+/927d1tbW7u7u1+9eiX8/imv3viws8K/96e7Ry62Fl/rPuF/xXz/VF+97diVL1RvXa9N/90H1j87duXr5DdA+IqNxLj/qOPW/bab99re+nz/Lyast8I/zTlw637brfttzS0dL170iIJ/41uBJcy3Nt7o314yS7Dxxsa3jFkn+iPe2PSWMbvkRc+LktkDB2668UI3evCAQIKiEHgxr+3GQGjv6JL5aHVucMJ8dd6FwP+ZORdEh5vkkwakngpuHdBeglm09poiegrNPlbgCGg3AMDw4/Lly1u2bCkQsXXr1ps3b9qm0NzcPHPmzEWLFiUlJZFPFdTX18+YMcOSdDrPLpim2draOnbsWGvSbu7cuePGjZs3b967775rbUlKSvrwww/5WGoxsf3r7MLdW/mQnv7F4sWLU1Pn7tmzZ8mSJYsXL1bc5Ldzzt/eq1p496fUK8c/25896u5PqXd/St05528tITIjY0/gVXDTlu5xZMm5qlP+a5X1NSfu32vQcZHFr/+41Ap9fX09PT0vX76UibYA/HdOyxuC6ZTd7jtR31N64yUv2kJQb1u3fyNTb4Gwdfs3OjmNxsSbaZrGmJSiX0zMlYV3Ug52PHv+8mXPkA+dnd2heRAAAIDbaW9vLy8vb2piX9ve0tJSWlrKb5fx/PnzMWPGTJ8+fdasWe+88055eblpmtnZ2WPHjk1JSZk6derkyYJvnqrFRGdnhzDs2PHNqlWrLLlZUVGRnZ195MgRWSJbJv3F3cqFDWfmXD8xo2LX7xvOzGk4M2fLpL9IzTqamnV06qI91j+pWUf/baFUvcksefas0wqaXmImzDRj8eqNSUeo2EJTb+vzd+88WLp9z2FFWJ9v/yLo6GH09LxC6Ol51dX1IobFAAAAYGhQVlY2cuTIkSNHlpUF3wmak5OTkJDw7rvvCr92H+ZH03W4cMibP/l/bJ3037f8699aYfMf/7pi+4KWtq6Wtq76hsfWP1aItjGhIZx7cxT01ZviDRXM2y1ihdHb+xqht/f18xcvY1gMAAAAhi2DoN6GAIOp3uIf4zV4/fr169cve17FuiwAAAAAICaC6m0IYLwBb968efOGeTIZAAAAAPGDp/Bh+CHWmYgYRh/o6+vr63vz5k2sywIAAAAAwB4j1gYAAAAAAAAHQL0BAAAAALgJqDcAAAAAADcB9QYAAAAA4Cag3gAAAAAA3ATUGwAAAACAm4iyevNnjzBGZPujeQqfJ9pnACJ8HsPjM8Mr4kGoHkOPoNMGisAVyMo62H792SNclh+BtY6qNOq/kBDrtT97hCHCLi1ZPHsjlIb6s0egbEE0GZ7qzefRbqDRQNGu+y0LmBUtberPHhFm5mOm3vpdJI0XLFw6g7wrqW47XnUDPbaMyPaHqN4kNSlSFSzo9YBtdLrhqTdxkyGKmjy36Ah5JoMOJo9hIoorj0P1pu2T+CaYc7bQLaQ+pwpRWnZSMRVspOIiE9YRf/YIopSEBtOHqLfSqBqgvXgT54K3VelGuyiUmz0+E9MdQwhGvcXD5a9DGxxXRp8nOFTrNNFQDZOmoRpM2P4gSk3Nnz1ixIjwchPyxE8k3Chzi89jkDrM51H27sSG+B1HFe5yVgRSARSBfBOOHmheulMPturNrskQhzGxiUIlG70sWvAYQURR5XFcjYfCdEwwD4JCl/pcXYikL6k2KxNkfJEpDiYuhQUGR0m9ceKUVamEBYI2GIIbxVFEJg6FagjM4ajeQq+64Tunv4EpTB4c9Wb5ILyFtzhUb9IhOnhmKhY7FxCXXVrE1Ju45kc+2wMpajY0G/Vm32TYZKio5NAudBbpQ8JyPqKg8jivxu4fNyV1Tuk6u0IktjPJy6qscG3C0copETEK6o3uieiLSN5wm0sDPTdKarvYRFfdcwFkGMQaGnG5QGh4flrb4/N5+jf5PMaIbF9/q/H4gjG4DtnnMUZkZ9N7TarFadtAH0bu0JpB4cd4OhrZEQVN0zHMzhsmcwaxcVL1xvqKMjv4gz2MZ6CzYHuQgZKl4sq2kyunZGdK+0RdvpK47MoxX22EHpS5lXYN4ROhemNquMwwcvuI7GxGghDRBcWhW08I/ws3MMOYqDVQZxYJjohXMHoaJniAtKwFnUX/KeglL1XDFkopui3ZS4fAf+KIfOURtQubHk/uk1CdT0sfxXQOW0OCHT8bk61ItKNFmwPxlT63lR3+7BEen2LllC0oGw0USJKzVzihxaGj3kQGsoboqLeBKwRjoGfWdKNNFDJvsp4PuBWmjdJT2HTvEehTDKYXDnR5/DBB9WX85Lo/2yOee1faQMkvn0eQBZu25/OwB/BXf5KFGFvDVN4QnE1gmuRQka8E8xZCl3LnEHR+dMnSxSHazqs3rihsy1cWlzqLYE0mVPXG+NcvWjkV1HCZYVT3T8lV4iJY4AHdehJMnBwdBOpNVBs1BA0dNRIVjFQEzOnoshb5d+AIvh7ZqTfhXsYB8hQCYzBXK5mIbOURtQubHk/mk9CdT55wxIgRgWpFZ1bYXw1slXcIGhWIKnS1z/VaLam3ZCqDLTL5wSL1xtTSKMy9sYeJayclmEn15sCNelFMQUemYzmIa+Qrp+LrCkUlEf3PdRQDZ5HPvtnaoHVBxzVR8X7+WpUcEQ16FLF1jp037Ew2+VZFHyq98OYv6eWXjxLLhFMLiu2cepPkSlW+0rjCHUS1caTe2IOowZO+aubyKzNMWgklql9Yaqr/eVfwGwbyIq2NBieDuF47chWM1LCC08nKmnGdR3zJoSxbyU7xbAQNNcM1cIg0olh5UT/tezyRTwK/QnB+sEqOyPZbQoHTMeIaYrKVRHoYcW5OarGLIs7UG7/NTr0Ji4xxDAXXehRy0W4rZ7y4rtpAXrkZ1tw9V14ORbBGbZcOwcClGNzlC6dnKCKq3tg5C5F6sx2kReMr32glBKcBLJuEQyW51KB0TuTVG+0VgUKwkgq2RclhTJZFvVsU1Jtt+arUGz+JYKfetOUbIVjt1JLMME31JvZAFNSbNN9kBRacI1IVzCcWXSLHKF1njBghvPlBlUXZPm6OgjdQ3J3JI9pf7Whcrwp8Epbz/f13sQZ0m4+r11L3cerNpgFR/ZOg0JU+FyTPHW+re3zSEUiopSgRJq6lMZl7U6fj1I12UbizaFoO4hryvjeTLnUfvcAhHOPDU29MXyiQEUIbyI30pRR1WSaBbc7kUO7xEEtp2axPdAyLrHoj8iP2FWe27DDyBGxXQAwglFuJUV2wnVNvVNK+bHoUFJcvHVc0vjlSb4KZgP4RjZlfCg6AtmpJYZiwEkrFH+26iKo3YW0UVGDWixGrYGJpRJ9OXE9ErhNVXG5skupRYq/t5RY/kcPlh1e7pJLi24WGehP4JLzW7SeeILf+J2wMXAXx/VVQHYpqdfAwcTnY6mHO53wh2MlFUQsVF5lMkBDdvayWxlq90WrevupK2oIwit9PNJOgsYoGC9wD+763/sufYH1gZp8jqt6IE4zweKgxXWUDOX9E3jCuC3mJxwoZaugXZV5lWCTVm4+9N0/sK26skx1GZIq7zAtOGni4PEu38+qNPDmh/BTly85r8MXiTL2Jk2E1PVn9NNSS2DAqc9xTC6KDgh6IuHoTNxO+ApPZj2QFIz0kcBPTFcjaL3+EUAbLx29+L1shRRDGi3LJRKSVF98udNSbwCfhtW5GylHZ513BXzCxF2sKlwXrnKzQ5T4X6RC1iBC2UGGRKSZg+VonM1hei8WEo97I7kNUsTXdaBOFyDNpA6behgT4UlYQ+3WDQbEhRs1KcWUafy09vKKKfJbioepoM8gl2n+6uKxHIRCRfLjYJxJBFeOTcQJJR7cHD9Wee+MUoI7ks105HWQGtQhB9IB6GyA+elJuRmTQcI1663dRWP1P+CLZT70FNExzBptBvkbweQxPtsZNDYNiibPZFUki4XsvfnzimLjrEYATXHWlCVRAvZkmv04zHHGNeosXiAUX9IYqYndFEr/AJwCA8IB6AwAAAABwE8Z2AAAAAADgHjD3BgAAAADgJqDeAAAAAADcBNQbAAAAAICbgHoDAAAAAHATUG8AAAAAAG7CsXrzeQwjwYvXW1H4PAbvFeEXeMI8SXx7Xs9CobPo3YEvAHkT4jzLESciPgQAADC0MbwJDt88Lh9RI/Ii83iE+zyKUKhJBlPbb/lpI/e8nyzF6Lue8Adtj5baiqR668+4bnZF37nR1EDSPGufj4kmSzASPgQAADC0oUY+n0drGPR5xAMHrVOG0AATlgCLnHqTe57E702IqnrzexModUVbpGOhGm31Zs1SeT2hi1VtV5ETYnyeNSKx51ImGL4PAQAADG2MUEYJiSBhN8f/Up8mcaPedBKLtnqzOVnY2dVUbwMfm/SFrt506ydrhZ6H2aOIVOwSjGiVAQAAMPRQ3fdmLUsJv31JzL8EEam3gd/98wnB5SLyQGrhj1+LEy4KKhOkljxvLV0AAB0ASURBVKwCCfq9CYbHayWY4PXrf2pQMZra39ymkLrimHSWmahiz3PR6UOk3uCdRnhfGMv+ZPK6oVivZHYL1Zs/UHJczFCkjrbKZbSW2AwR5NdzSTPtE3TuQ/3mAFkIAADuJzT1Jp4UEaycUktFwQGHHDnp46hlJGqAZYZpeYKm35sgNMPKT4LXH/hHc5bD/igbfSeQYEyWKUepzqV3Kxg95yMpFNXSnjwWdy7WGlsLGZXIGCyce5MvV4aq3vQnhokj++8G8OlPbwZ0EzO1ZpOgUx8qmoOqsgEAAHAnIb8xRHBzjmQCJbCPGbGDwzJ1JDFw0UqGHtFkCYoMJdQbc1J99aaYOFKnw+/ibGUmKW1MsrktSj0+U9awd18pbzGTzAWJ4thYSBedasY2OA2pNM25HHEiYixzfcSljGZsQnKS03B6CTryoaI5KCsbAAAAdxL6+974UUA1Lsj2CUQDLbdUc2+yk0kewQxLvUVw7k305CN7h5RKtKjN4ZSA4oFUxSBv9xgrpUecWUgpDc5cfu7Np3pOICT15uhNJPzKplZ00c1s1m+9BB34UHW0XWUDAADgQkJ6asGCuzknVPUmnXtjFITeydhFtgjNvUVYvWmNn7L1QuXNb7QSkHuD+s1stoulWFPXsNDZ3FuC16+Y5gtJvemvmgoP19N+3EmCGdNL0IEPbdQbxBoAAAwxmOkBTkfZzfJojSDKfYL73og7dvSWAFmr2Pvt4ku9hXzDvHS73+sZ+KW8qUwwYebzGIbH4xFMvMli2Uo3leUCE4mfA3KdU2+mVKZJ1ZtltUT7KuspF0t+M6YCxk18GrYJOvChogLiTjcAABh6GB7Z5JbOME3fnBOaejOZ1R12Hkay5qNIkJyys9bdoqbeBOtS1EqvdMGKXZjk7/QyJOIjkDo3saMqRd4b9H7RowfCWNyKquCUQgtpWyXG9z9SIlJvgVMTq+o09On6E2VNkz//oIpFnU5bCtE2itxuk6C+D5UVWVbZAAAAuJQwv3Ma1XUZLnFMIwSJ/xUxLOaFD3wIAABAQLhfqXd0/7fzpPm7rYbE638jQRQ9HyGop4eFa+PADvgQAAAAT7jqLbqwq48YsFyLfGnXtQgf5xSs4UbjhEPFhwAAAEIhvtUbAAAAAACggXoDAAAAAHATUG8AAAAAAG4C6g0AAAAAwE1AvQEAAAAAuAnH6s3hV4aGB8IPOUX6CcH497yehfKvXgV2i9/WOyxQ+FDvkx+xdFhYVTQ846P+5snBcmucNHPUw9BjD4l6OFQZSnXDIF/Drv3xTbH9Q/b9HtyrIYRCLeS+The55+0+KR9hCH/Q9miprUiqN+rzC44Md/p2D2metc/HRJMlqG5fgzpq+iPVOQh7TNEHbuOoZ6RQVkTV55gjeq5BbeaohyERw3oYeSKaGXUzCal/ZVMdbnVD9Z1ThRHSD4YHE4j19VcECcvrkSwy+ZeTgkT7Ta7sl6y4j16FWeba6s1qbt4QvlI/gLaryJat/c5oujvgPx0rTVCvfUUb9gOy4XQOwnIMv6owqUXVOapCifSJ46GZK8xAPVSfNyb1MFoni1Jm+M5RPqaoUxnOdcMIxTSJFSKhOiTkW9yoN53EBvU9/PzJws6upnrzeYJfqg3xhLr1k7VCz8PsUUQqdglqtq9oEnrbFVnpxp5R7wTR6ePipJmjHkbmtBFlsL0fpXPJkw7pmjr8k7uxbqjue5N/pZ7UynLjyN/9bgjOj3KfwBLPm/IfI++PqEyQWrIKJOj3Jhger5Vggtfvk3yQnEfhdfub2xRdoDim6tvmEs9z0elDpN7gnUZ4XxjL/mTyukEiX0YkM021KH+g5LiYoTQJ7U6CadZiM0RYmbJOQZppn6CqfRHVgxF84hpjNRRFPbUSpPNj3zE66xwCjSCYd+obYCEaL6k2pqRLkXXQ9HW/o6YndwPX8vnuUJ7vOGnmqId6xse+Hspj2VUAYSx+2GWLRjh+aY+wqkUVUceMuiGuGyFl3v4c7LDanwdi8oGQYUz502tKRIfHJS9M0PR7E4RmBKpAsC7oqWH7o2z0nagu0lmmHKU6l96tYHQdkRSKoBWTRsmKkj2XqMtXWsg0O8Zg4dybfDo9VPWmf+FGHOmz7gbw6c97BNouM8LZJChtX0wHK+2BZLEE2Rb0jBrK1lnnELCrP8N+UQfqzHhFtZF2KZK2SBRGCE0vUMTsPrV6sy+UOGjmqIe2xsdLPZTHEsh1zeFGslc6ftmNsITykFZu6ZiCusHtDfmNIT5+TlGuMoUjdnBYpo6Umko7XJagyFCibjEn1VdvJE6ajmAXZ6u8VCUJqvp1da3mmq5S88vzEDBVFMfGQrro2LTF1xlK05yrN+2Jt4C5PqIn0IzNNEmmgdskKGlfMk9pb9Kq8U7cI4IzfqAb9HkSvF5rp3bPKDZe7gxFlxI4Z7C2M0mG3PQCVVVas9lWblMocdLMUQ/VxsdNPVTEUlQA9bnEhSQfv/RHWNnluHRMEacwzOtG6O974/OhapCyfSoNbDv3JjsZN+8bAfWmPsqRemPFIKt17a5Q1OZwFUPijYFd3ByxbSwiE9p5ZvfKV3ZY9davc2QtOiT1ZjuzwR5saF4qsNGYVh1slvYJ2rcvwfxFnIya3Fn6M+jzGB6fGfgbhvGKamNzWd3fK3s8ngSvn+3Ew2t6zKAUnnqLj2aOeqg2Pq7qoTQWXQGYiIpzKa7aheOXkxFW4h7t8kbdMIyBpxYMAwEBQSfoaT9uTAu2XXaXOEGuox28OQ/ppbE2jPFWDr3BJ008vvB6xtCua/vN8nsTPD7T5+lf4pFdVYocIDueiic20al6U5+LrjOsuRLvMJvtYknMQD2M93rIx/IFbhOXe1MYS6LexOd2ot5E4smRHEPd8A6kEesREQHBLUHvmo/pjai+hv8h67nJzoPuDAQzHqGNmv3XcoJoTESut7GbG2JXaMhuLSFBMemuYzyR/4GrUXIX43liV4LHkxDooD2y4Uwm0dXSnTozq+QYC+2lDHsuv9cz8IspfboOCeYwfB6Dz6xtLLEZqIdxXw/5vX5vguHxeGwvPRQVxG6zE/Umqr92chR1g7XfsCy2hiXGLHs1TGtT1eWU8lKLmoplxapkYl+RIDm1aK27BQVvhFdOBZPIVPFIjOdXLKgeP4jqFhXuKkngQIU36P3siaSxuKUWwSmFFtK2SoxnrjQEEwzU1QsNfTpmvKQyZjP8CjJknU7YTOTQNgrHKqn7BqyRTJkbdg3FgVAQd41squF1DlZSCaT4YJWNY+Ol1UZhOmU23fuH1PRY24V10DoLaaHuRFTMmrnKDNTD+KuH9rGEjtKMxe8Vj1/KEZZ2L2mIxpiCuiH0VH8Ma2RyjJ76CREucanmH4ZE1fMRQXvO3EWE2ExCZnBc5XjRQg8Xl7OSwcxXnPgQ9TAOcZYv9WRd3IO6ISBM9RbNOsFptbAXuocU8d8aCQuJKW1XS/DBVm+DUso+j/CyO3ziv4qGxmDmK058iHoYhzjIl6t7XRN1Q0y46i26sPOVLq5+wx35mo+boJqJYDY9OEseSyv1kS5IADCIoB5Gi8Bam2t9i7ohJb7VGwBxBZoJAACAOADqDQBt0EwAAADEAVBvAGiDZgIAACAOgHoDQBs0EwAAAHEA1BsA2qCZAAAAiAMcqzfhq7XDwvZpxKg9LRxV4v9R5BCLUlFeQ+PBUgVQbwAAAOKAgXf2Wp8A0hnKFaqEe4WCE21g80GDqAoh3a+9OCH+1ZuticzLp/mdEveIX7Mc+fdqDP6rFqHeAAAAxAFG/+DnZFiSfgMprNE0lm89FsoY+aeeQk8z3lDm0eexvtrruLDluyLrFKg3AAAAw5JQ1Jt01IR6s0sz7lBrsASvP5TChnoDAAAAoohKvck/LcZ8bnUAm9GUWj/TWqiU30dlSQvZftXnwcnlXf6b90F5QQkNqemExGGSFMXnvrjOWajOF2W86ovT0m9bC7/arv4ytaRUI6re5BYKHSVciR0MqQz1BgAAIA7oH/msYYkZcRUfhhWPwtx9b0Rcn0eWFnGAvhroPxU5mvNSTGg2ra/6fwWiBO+xC8oa2nT6a6v9dvT/JtMPuEjweVabe/wk+fJ7EyiZx6g+udAWZpk8QCB8iJlHsbURU28qC9XXA5h7AwAAMCwJaeXUNMXrimGtmDlXb+Qm8rdSyXCTUoEpN4/PNH2ewJ1eA5t4wUMmwzzvQOwKzg9JZK5sxkuaL/mRcvfKs0xtUi4bi79wHCn1prRQrfmh3gAAAAxLQlZvOpJKZ4/OIZrqjVFRvHYSflacXDD1eQyPzwz8DUydMYKDOLmdUPHxE28qC9X54hYMSZGjnMuTTolKotNbhPItUurNzkKJo2xMiBJQbwAAAOKA0NWb4I4ptYgYtLk31kibJcCBwxK8Xk9g+dTjI9Wbeu7NRqjYvPCEX4kV54tdgGWnqMJ5DJgtSh3NF0n1piXB+BVoqDcAAADDktCeWgju1x1NBTd/MYSj3hTikH94QLpiGcysz2MkJATiCe5707zHjtR4UkdSFsrzxZ9XejMem7q9xKGLks+UIJUo3fembaSTmBED6g0AAEAc0D+vInxbr5164+6Y4qZs+LGW3yWY56HuetLaRRrJrC8KM8XF9NEvpmXEEX06vfvSaK3Rf1piGk1soSJfVDRrTVaebTJNSZZpbJ5SCAql0MpL6BRbC9VFybkEz5wCAAAYFoT5ndPBX7uK9YmjTOzyNVQ9GlGg3gAAAMQB4X6lPlbvpB2qWiOG+XLH64VjC9QbAACAOCBc9RYroN5ADHBbMwEAADAkcat6AyAGoJkAAACIA6DeANAGzQQAAEAcAPUGgDZoJgAAAOIAqDcAtEEzAQAAEAdAvQGgDZoJAACAOADqDQBt0EwAAADEAYb1gnwTAQFBMwAAAAAxZeCzRDEfEREQ3BIAAACAmGKE9259vFwWAAAAAGBQCWsiAd9WAgAAAAAYZAyPEUB3Es3vTRiIAu0GAAAAADCoGAHF5vM4F2N+bwIUHAAAAADAIEKsnIa0DorFUwAAAACAwYRQb6FMvuGxBQAAAACAQcUYkGt+bwKrw3weu1vbQhJ8AAAAAAAgZILPLPAqzFJvQknn9EEHAAAAAAAQEfDqUQAAAAAANwH1BgAAAADgJqDeAAAAAADcBNQbAAAAAICbgHoDAAAAAHATUG8AAAAAAG4C6g0AAAAAwE1AvQEAAAAAuAmlevN5bL61oAQf0QIAAAAAiDiUemP1lmvVG/VBCCcZ8HsT8AkJAAAAAMQzrHqL4FdLY6Xe6I+vCr7fqozn9UC9AQAAACCOGXrqjZVrfm+CTq58HiuSD+oNAAAAAPGMQagbQucQS4+MkrEUnnQ//RF7VkVxq5lCaUXKPiqWpqqybLCOdSzGoN4AAAAAENcYxM1tfm+CQIvx6o3QUdQqJTPrRUamNZHfmzAQTXAGRkSGpqQCKtJpdKg3AAAAAMQ1hs+T4PVaK6ba6o3YRPwUPfNg/ebvPQsotMA5g5qNSdK5lGLEIebeAAAAADCEMDyGx9d/0xd/25sT9cZJNHqXLGVfQDl6PJ4Er5+9+45YOtW7J4+1w6Ecg3oDAAAAQFwT1FAeX3jqLbS5t/7JN783weMzfZ4Er5+fAQxG0Xz8gD7M2fIr1BsAAAAA4hpCeiUkyGfIpJvYm9v6ExiYMVPc90bsSvB4EgIi0iN78FXz4VHr1KJ77EibpUIQ6g0AAAAAcY0xoGGoO8SYJ0dZHSZRb2Q8fhKNSpN7FpU6sfiBU/23mdg8qEo/eCGM4+x8AAAAAACDBr5zCgAAAADgJqDeAAAAAADcBNQbAAAAAICbgHoDAAAAAHATUG8AAAAAAG4C6g0AAAAAwE1AvQEAAAAAuAmoNwAAAAAANxGmetP8/sFQx+cRvNyXeD1xFL7dEP+el1kodBa9m3xdc3xnMsooHEDtsv8anI3XQzYjNEKsG+Gfy22OcjXwhmmaGB2EYHQIH79BfmLAcTWSfWkharUyNnCfnhA2RcWntyLvCTpV7kMR0XU94Q+9dsbHjlD77M+4bnYF3xDRbf9aeVaeT/AVOrsEFXWHb3rREyURr8Kh1o3wz+UyR8UYP0YHezA68CfH6OD0fOGPDj6Ps3JlPmsvaK1DQxqH1cSi0j59so/BMh+RjQLkB9AEH5HVsFCNdvu0PqvrDeO7tNquIr7gq8qzPBJ7Lr0EFT5UNr0IE3JRDlqC+udyl6NiCvvFZ4wOYjA6MOljdBis0cEIvf1wzmNrIm2gi4m39qmsttFun1onC2NSW7N9+jzWUewY4/BMOkayVuh5mD2KSEUvQd1V04GsRKnMB23VNBq42lExJdzOG6ND9COLwegwbEYH1X1v1PfjhXvpfaL2SXzcPsHrJyYEyQOpqV3aY/zH44Pfs5cnSE1KBhL0exMMj9dKMMHrF36sXojNApZ6PloSmbSQ3k1nWVL55VYLClvqDd5phPeFsexPJraQnZWWTxSTmaYqsj9QclzMUNqndj/GtCaxGSKsTFmnIM3US1BRyrKmR9Qcas5EVpmsNqSuwurKFgLO6oZ+MxcZGXNHqdqyzHhZlh01WJ0EaSPp+mc/dmF0kGRMfCKMDgoLMToYVDPXHR1CVm+CaieYG6cmA4NGkL6hj6MmCikXMgUhT9D0exOEZgR6qWB3pXfpY3+UTQsWdZd0lilHhXwuPjm5N9STt/JY3Ln4mmpjIdMPMAYLr67U88ehtE/9S3/iyP71Hp/+BWyg42FUgm2CzmoUPdYIux7bWEKPRHxuwFndUDRzVSOSn2tQHSXPq10PIO8qJQ02tASJo+kcaQxeGB3kedU/AqODKAMYHfRGh1CfOZV1VrLrAkGZBB3P9SWE9cF9tCiVJaiwVHBS/fapuDRQp8PvUi4q2NY3O5PVHS8Vm/ShcjZbfM7+ysXFsbOQLjrVNXnwQlNpmvP26WQBwTLXRwxWmrGJToW80NJK0FmHr3Si9ia9SOHhrG4omrntylwcOEo5ril7AEnPJm2woSYow0n7EIDRwdYd0l0YHTA66I4Ooak3cWGqykW2T5AS3aBUV1eyk3ET6hFonxG8umKbO9ubEeZzTrbvermylniDTo1LVxGLyIQgz/YWUu2TM5e/uvJJL63MENunzgBGHWw4Hv+4jAUNtU9QcQK9pie4dgxBlDhykw4O64bIJnKHqhHFiaPEbVlpvF3PJmqwIScoISz1htFB/wiMDiKPYHTQGx1CempBYl+o7VPaEzJ1RG9ygp1GjdDVVYTbp1aN4meENWoGfYjcG9RvZrNdLMWqiYaFzq6uErx++YVcaO1TMGQ7OVyvdXMnCWbMLkHH4i06U0oxEG/O1JvdJEM8OYpqUkrj1TkTN9gwEtQw13lUjA6aR2B0YMHooD86MH0A11JEeZfVr1DaJ+tgsr36vYr7L9XtM7CHvAiIl/apf2XLFpy8l/MMHMWUvdwbZJIeD98NSGMpGqeeQxkTiZ8DHTLXPk1pQ5S2T8tqQTtSel8Yi+qudAuPcROfhjRBZ5VJsF3Y/zgWJfYqQtVlOpx9kZkuj+NgDUi6fTAcRdorn1PQMJ3czTbYcBIcaHV20ycYHZwar3EERgfRMRgd9EYHwyOf/pQUREiXw7YXh0IjqB30XkWC5EWZNbMatfbJGxg4ULGLsZGtkQR0RbHpBVSlyHuD3s/WY2ksbs5ct1RoW7nrjkB+yV5ZcKVIdrYMvLN4b9hNKkhiUafTvpajbRS5XbQnBPGmmoewqaJSFaIhIiS+kOwKqW4oI8kaUZw4StmW5cbriS2+CoecoES+mYqO2cTooGE8RgftUqFtxeigNzo4vu8t4sspcrjC1r4qGZIMoudDRNNCvU5xmOJ81XSwzYhqghGpG652VCxQTpg4TQijQyyI/3qI0SF8GB86VW+DWEm41hjGvRhDAFc3T2LVZXh3snYMQ/EW8brhakfFAp9HML8SChgdYkX810OMDuHD+jDMr9RHGXZ+GcXqWuST965FsPohnKUHNgzBuuEWpIumLgCjw5BhCPYAgzE6xLd6AwAAAAAANFBvAAAAAABuAuoNAAAAAMBNQL0BAAAAALgJqDcAAAAAADcB9QYAAAAA4Cag3gAAAAAA3ATUGwAAAACAm4B6AwAAAABwE1BvAAAAAABuAuoNAAAAAMBNQL0BAAAAALgJqDcAAAAAADcB9QYAAAAA4Cag3gAAAAAA3ATUGwAAAACAm4B6AwAAAABwE1BvAAAAAABuAuoNAAAAAMBNQL0BAAAAALgJqDcAAAAAADcB9QYAAAAA4Cag3gAAAAAA3ATUGwAAAACAm4B6AwAAAABwE1BvAAAAAABuAuoNAAAAAMBNQL0BAAAAALgJqDcAAAAAADcB9QYAAAAA4Cag3gAAAAAA3ATUGwAAAACAm4B6AwAAAABwE1BvAAAAAABuAuoNAAAAAMBNQL0BAAAAALgJqDcAAAAAADcB9QYAAAAA4Cag3gAAAAAA3ITRrsEF96CTHQAAAAAA9wL1BgAAAADgJqDeAAAAAADcBNQbAAAAAICbCKq3SQPwB8VakjlgEF0HAAAAABAD+tWbQrq1Q70BAAAAAMQNRruddGuHegMAAAAAiBsMW+nWDvUGAAAAABA3YO4NAAAAAMBN4L43AAAAAAA3gWdOAQAAAADcBN73BgAAAADgJqDeAAAAAADcBNQbAAAAAICbgHoDAAAAAHATWuoNAAAAAADECYYJAAAAAADcA9QbAAAAAICbgHoDAAAAAHATxp2m5wgICAgICAgICG4JUG8ICAgICAgICG4KUG8ICAgICAgICG4KUG8ICAgICAgICG4KeGoBAAAAAMBNQL0BAAAAALgJqDcAAAAAADcB9QYAAAAA4Cag3gAAAAAA4oisrCz1AVBvAAAAAACRpLm5KTMzY/HiNL+/PrCxpubnBQvmrlu3qqOjXR0d6g0AAAAAYFBZsCClqGj/8eO+5OTE+vobpmlWV5+bPXtGefn3O3ZsW758iTo61BsAAAAAwKAyZcofLlyorqurO3GiZNq0qUVF+5KSPv3xxzN1dXWnT5/yeCaro0O9AQAAAAAMKrt27Zgx47Pq6uq6urqSkuLp0z1nzpyuq6urrq5OSkosLS1WR4d6AwAAAAAYbAoKtnz22SfV1efr6uquXbtWV1dXXX0+MXHq0aOHbeNCvQEAAAAAxIAlS9JnzUr6/vvvU1NT586dm5jo2bgxz9pVXl6enJy8cuXKjo4OPiLUGwAAAADAYHP69KmJE39XVlY2c+bMdevWrVu3btq0aRMm/K629kppaens2bNzc3OXLVu2evVqPi7UGwAAAADAoPLDDxUffPB+RUXFuXPnpk6dmpeXt2XLlqysrKlTp06cOGHatGnWlrVr137++ed8dKg3AAAAAIBB5e233yovL6+rqzt3rurDDydOnjw5Ozs7Ly8vMzPT4/FY/2dlZX3yySfV1dV8dKg3AAAAAIBBZcyYt48cOVxVVfXb375fWLi7oKDg448/XrNmzVcDZGZmTpo0qbKyUhgd6g0AAAAAYFA5efLkqFEjR40auXPnTmtLWlralClTsrKysrKy1qxZ89FHHxUWFsqiQ70BAAAAAAw2L1++bGtrs/4/ePDgxIkTMzIyVg6QlpY2fvz42tpaYVyoNwAAAACAmHHgwIHx48cvWrRo2bJlaWlpEyZMsP6fO3fu+++/f+XKFT4K1BsAAAAAQGxobW0dO3bs/Pnz09PT586dO27cuHnz5r377rvWlqSkpA8//JCPBfUGAAAAABAbnj9/PmbMmOnTp8+aNeudd94pLy83TTM7O3vs2LEpKSlTp06dPFnwzVOoNwAAAACAmFFWVjZy5MiRI0eWlZUFNubk5CQkJLz77rsNDQ18FKg3AAAAAAA3AfUGAAAAADCk+P/5qKNWg+lclwAAAABJRU5ErkJggg==" alt="" />
补充:获取系统所有属性的方法
package com.test;
import java.util.Properties;
public class MyTest {
public static void main(String[] args) {
Properties properties = System.getProperties();
for (Object key : properties.keySet()) {
System.out.println(key + " : " + properties.getProperty((String) key));
}
}
}
源码查看:所有的属性都存在System的一个内部属性Properties中，Properties是一个继承HashTable的类
(1)System.getProperties
public static Properties getProperties() {
SecurityManager sm = getSecurityManager();
if (sm != null) {
sm.checkPropertiesAccess();
}
return props;
}
private static Properties props;
(2)Properties是一个继承HashTable的类
public
class Properties extends Hashtable<Object,Object> { private static final long serialVersionUID = 4112578634029874840L; protected Properties defaults;
。。。
}
结果:
java.runtime.name : Java(TM) SE Runtime Environment
sun.boot.library.path : C:\Program Files\Java\jdk1.7.0_80\jre\bin
java.vm.version : 24.80-b11
java.vm.vendor : Oracle Corporation
java.vendor.url : http://java.oracle.com/
path.separator : ;
java.vm.name : Java HotSpot(TM) 64-Bit Server VM
file.encoding.pkg : sun.io
user.country : CN
user.script :
sun.java.launcher : SUN_STANDARD
sun.os.patch.level :
java.vm.specification.name : Java Virtual Machine Specification
user.dir : E:\xiangmu\Mytest
java.runtime.version : 1.7.0_80-b15
java.awt.graphicsenv : sun.awt.Win32GraphicsEnvironment
java.endorsed.dirs : C:\Program Files\Java\jdk1.7.0_80\jre\lib\endorsed
os.arch : amd64
java.io.tmpdir : C:\Users\ADMINI~1\AppData\Local\Temp\
line.separator : java.vm.specification.vendor : Oracle Corporation
user.variant :
os.name : Windows 8.1
sun.jnu.encoding : GBK
java.library.path : C:\Program Files\Java\jdk1.7.0_80\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;C:/Program Files/Java/jdk1.7.0_80/bin/../jre/bin/server;C:/Program Files/Java/jdk1.7.0_80/bin/../jre/bin;C:/Program Files/Java/jdk1.7.0_80/bin/../jre/lib/amd64;C:\oraclexe\app\oracle\product\11.2.0\server\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;E:\soft\apache-maven-3.5.3\bin;C:\WINDOWS\System32\OpenSSH\;E:\git\Git\cmd;E:\SVN\bin;C:\Users\Administrator\AppData\Local\Microsoft\WindowsApps;E:\soft\maven\apache-maven-3.3.9\bin;C:\Program Files\MySQL\MySQL Server 5.7\bin;C:\Program Files\Java\jdk1.7.0_80\bin;E:\git\Git\bin;E:\git\Git\usr\bin;E:\git\Git;C:\Program Files\Java\jdk1.7.0_80\jre\bin;D:\zdcontomcat\zdc8\lo\program;;E:\soft\eclipse\eclipse-jee-mars-1-win32-x86_64\eclipse;;.
java.specification.name : Java Platform API Specification
java.class.version : 51.0
sun.management.compiler : HotSpot 64-Bit Tiered Compilers
os.version : 6.3
user.home : C:\Users\Administrator
user.timezone :
java.awt.printerjob : sun.awt.windows.WPrinterJob
file.encoding : UTF-8
java.specification.version : 1.7
java.class.path : E:\xiangmu\Mytest\bin;E:\xiangmu\Mytest\WebContent\WEB-INF\lib\log4j-1.2.16.jar;E:\xiangmu\Mytest\WebContent\WEB-INF\lib\slf4j-api-1.5.10.jar;E:\xiangmu\Mytest\WebContent\WEB-INF\lib\slf4j-log4j12-1.5.10.jar;E:\tomcat\apache-tomcat-7.0.88\lib\annotations-api.jar;E:\tomcat\apache-tomcat-7.0.88\lib\catalina-ant.jar;E:\tomcat\apache-tomcat-7.0.88\lib\catalina-ha.jar;E:\tomcat\apache-tomcat-7.0.88\lib\catalina-tribes.jar;E:\tomcat\apache-tomcat-7.0.88\lib\catalina.jar;E:\tomcat\apache-tomcat-7.0.88\lib\ecj-4.4.2.jar;E:\tomcat\apache-tomcat-7.0.88\lib\el-api.jar;E:\tomcat\apache-tomcat-7.0.88\lib\jasper-el.jar;E:\tomcat\apache-tomcat-7.0.88\lib\jasper.jar;E:\tomcat\apache-tomcat-7.0.88\lib\jsp-api.jar;E:\tomcat\apache-tomcat-7.0.88\lib\servlet-api.jar;E:\tomcat\apache-tomcat-7.0.88\lib\tomcat-api.jar;E:\tomcat\apache-tomcat-7.0.88\lib\tomcat-coyote.jar;E:\tomcat\apache-tomcat-7.0.88\lib\tomcat-dbcp.jar;E:\tomcat\apache-tomcat-7.0.88\lib\tomcat-i18n-es.jar;E:\tomcat\apache-tomcat-7.0.88\lib\tomcat-i18n-fr.jar;E:\tomcat\apache-tomcat-7.0.88\lib\tomcat-i18n-ja.jar;E:\tomcat\apache-tomcat-7.0.88\lib\tomcat-jdbc.jar;E:\tomcat\apache-tomcat-7.0.88\lib\tomcat-util.jar;E:\tomcat\apache-tomcat-7.0.88\lib\tomcat7-websocket.jar;E:\tomcat\apache-tomcat-7.0.88\lib\websocket-api.jar
user.name : Administrator
java.vm.specification.version : 1.7
sun.java.command : com.test.MyTest
java.home : C:\Program Files\Java\jdk1.7.0_80\jre
sun.arch.data.model : 64
user.language : zh
java.specification.vendor : Oracle Corporation
awt.toolkit : sun.awt.windows.WToolkit
java.vm.info : mixed mode
java.version : 1.7.0_80
java.ext.dirs : C:\Program Files\Java\jdk1.7.0_80\jre\lib\ext;C:\WINDOWS\Sun\Java\lib\ext
sun.boot.class.path : C:\Program Files\Java\jdk1.7.0_80\jre\lib\resources.jar;C:\Program Files\Java\jdk1.7.0_80\jre\lib\rt.jar;C:\Program Files\Java\jdk1.7.0_80\jre\lib\sunrsasign.jar;C:\Program Files\Java\jdk1.7.0_80\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.7.0_80\jre\lib\jce.jar;C:\Program Files\Java\jdk1.7.0_80\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.7.0_80\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.7.0_80\jre\classes
java.vendor : Oracle Corporation
file.separator : \
java.vendor.url.bug : http://bugreport.sun.com/bugreport/
sun.io.unicode.encoding : UnicodeLittle
sun.cpu.endian : little
sun.desktop : windows
sun.cpu.isalist : amd64
补充:可以采用System.setProperties设置系统属性
public static void main(String[] args) {
System.setProperty("mykey", "myvalue");
String property = System.getProperty("mykey");
System.out.println(property);
try {
Thread.sleep(100 * 1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
我们可以在cmd窗口通过jinfo查看变量
C:\Users\Administrator>jps
1236
8544 MyTest
9384 Jps C:\Users\Administrator>jinfo 8544
Attaching to process ID 8544, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 24.80-b11
Java System Properties: java.runtime.name = Java(TM) SE Runtime Environment
java.vm.version = 24.80-b11
sun.boot.library.path = C:\Program Files\Java\jdk1.7.0_80\jre\bin
java.vendor.url = http://java.oracle.com/
java.vm.vendor = Oracle Corporation
path.separator = ;
file.encoding.pkg = sun.io
java.vm.name = Java HotSpot(TM) 64-Bit Server VM
sun.os.patch.level =
sun.java.launcher = SUN_STANDARD
user.script =
user.country = CN
user.dir = E:\xiangmu\Mytest
java.vm.specification.name = Java Virtual Machine Specification
java.runtime.version = 1.7.0_80-b15
mykey = myvalue
补充:System可以获取系统的环境变量
// 读取单个环境变量
String str = System.getenv("JAVA_HOME");
System.out.println(str); // 读取所有的环境变量
Map<String, String> getenv = System.getenv();
for (Map.Entry<String, String> entry : getenv.entrySet()) {
System.out.println(entry.getKey() + "========" + entry.getValue());
}
结果:
C:\Program Files\Java\jdk1.7.0_80
USERPROFILE========C:\Users\Administrator
ProgramData========C:\ProgramData
PATHEXT========.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
Classpath========.;%JAVA_HOME%\lib;%JAVA_HOME%\lib\tools.jar
JAVA_HOME========C:\Program Files\Java\jdk1.7.0_80
MAVEN_HOME========E:\soft\maven\apache-maven-3.3.9
.......
java的System.getProperty()方法可以获取的值:
|
java.version |
Java 运行时环境版本 |
|
java.vendor |
Java 运行时环境供应商 |
|
java.vendor.url |
Java 供应商的 URL |
|
java.home |
Java 安装目录 |
|
java.vm.specification.version |
Java 虚拟机规范版本 |
|
java.vm.specification.vendor |
Java 虚拟机规范供应商 |
|
java.vm.specification.name |
Java 虚拟机规范名称 |
|
java.vm.version |
Java 虚拟机实现版本 |
|
java.vm.vendor |
Java 虚拟机实现供应商 |
|
java.vm.name |
Java 虚拟机实现名称 |
|
java.specification.version |
Java 运行时环境规范版本 |
|
java.specification.vendor |
Java 运行时环境规范供应商 |
|
java.specification.name |
Java 运行时环境规范名称 |
|
java.class.version |
Java 类格式版本号 |
|
java.class.path |
Java 类路径 |
|
java.library.path |
加载库时搜索的路径列表 |
|
java.io.tmpdir |
默认的临时文件路径 |
|
java.compiler |
要使用的 JIT 编译器的名称 |
|
java.ext.dirs |
一个或多个扩展目录的路径 |
|
os.name |
操作系统的名称 |
|
os.arch |
操作系统的架构 |
|
os.version |
操作系统的版本 |
|
file.separator |
文件分隔符（在 UNIX 系统中是“/”） |
|
path.separator |
路径分隔符（在 UNIX 系统中是“:”） |
|
line.separator |
行分隔符（在 UNIX 系统中是“/n”） |
|
user.name |
用户的账户名称 |
|
user.home |
用户的主目录 |
|
user.dir |
用户的当前工作目录 |
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