代码：
1 import java.io.InputStream; 2 import java.io.ObjectInputStream; 3 4 /* 5 * 把获取到的真实地址转换为火星坐标 6 */ 7 public class LocationUtils { 8 9 public static double[] standardToChina(Double x, Double y) { 10 11 try { 12 double[] haha = new double[2]; 13 PointDouble pointDouble = new PointDouble(x, y); 14 PointDouble s2c = ModifyOffset.getInstance( 15 ModifyOffset.class.getResourceAsStream("axisoffset.dat")) 16 .s2c(pointDouble); 17 haha[0] = s2c.x; 18 haha[1] = s2c.y; 19 return haha; 20 } catch ( Exception e ) { 21 e.printStackTrace(); 22 } 23 24 return null; 25 26 } 27 28 static class ModifyOffset { 29 private static ModifyOffset modifyOffset; 30 static double[] X = new double[660 * 450]; 31 static double[] Y = new double[660 * 450]; 32 33 private ModifyOffset(InputStream inputStream) throws Exception { 34 init(inputStream); 35 } 36 37 public synchronized static ModifyOffset getInstance(InputStream is) 38 throws Exception { 39 if ( modifyOffset == null ) { 40 modifyOffset = new ModifyOffset(is); 41 } 42 return modifyOffset; 43 } 44 45 public void init(InputStream inputStream) throws Exception { 46 ObjectInputStream in = new ObjectInputStream(inputStream); 47 try { 48 int i = 0; 49 while ( in.available() > 0 ) { 50 if ( (i & 1) == 1 ) { 51 Y[(i - 1) >> 1] = in.readInt() / 100000.0d; 52 ; 53 } else { 54 X[i >> 1] = in.readInt() / 100000.0d; 55 ; 56 } 57 i++; 58 } 59 } finally { 60 if ( in != null ) 61 in.close(); 62 } 63 } 64 65 // standard -> china 66 public PointDouble s2c(PointDouble pt) { 67 int cnt = 10; 68 double x = pt.x, y = pt.y; 69 while ( cnt-- > 0 ) { 70 if ( x < 71.9989d || x > 137.8998d || y < 9.9997d || y > 54.8996d ) 71 return pt; 72 int ix = (int) (10.0d * (x - 72.0d)); 73 int iy = (int) (10.0d * (y - 10.0d)); 74 double dx = (x - 72.0d - 0.1d * ix) * 10.0d; 75 double dy = (y - 10.0d - 0.1d * iy) * 10.0d; 76 x = (x + pt.x + (1.0d - dx) * (1.0d - dy) * X[ix + 660 * iy] + dx 77 * (1.0d - dy) * X[ix + 660 * iy + 1] + dx * dy 78 * X[ix + 660 * iy + 661] + (1.0d - dx) * dy 79 * X[ix + 660 * iy + 660] - x) / 2.0d; 80 y = (y + pt.y + (1.0d - dx) * (1.0d - dy) * Y[ix + 660 * iy] + dx 81 * (1.0d - dy) * Y[ix + 660 * iy + 1] + dx * dy 82 * Y[ix + 660 * iy + 661] + (1.0d - dx) * dy 83 * Y[ix + 660 * iy + 660] - y) / 2.0d; 84 } 85 return new PointDouble(x, y); 86 } 87 88 // china -> standard 89 public PointDouble c2s(PointDouble pt) { 90 int cnt = 10; 91 double x = pt.x, y = pt.y; 92 while ( cnt-- > 0 ) { 93 if ( x < 71.9989d || x > 137.8998d || y < 9.9997d || y > 54.8996d ) 94 return pt; 95 int ix = (int) (10.0d * (x - 72.0d)); 96 int iy = (int) (10.0d * (y - 10.0d)); 97 double dx = (x - 72.0d - 0.1d * ix) * 10.0d; 98 double dy = (y - 10.0d - 0.1d * iy) * 10.0d; 99 x = (x + pt.x - (1.0d - dx) * (1.0d - dy) * X[ix + 660 * iy] - dx 100 * (1.0d - dy) * X[ix + 660 * iy + 1] - dx * dy 101 * X[ix + 660 * iy + 661] - (1.0d - dx) * dy 102 * X[ix + 660 * iy + 660] + x) / 2.0d; 103 y = (y + pt.y - (1.0d - dx) * (1.0d - dy) * Y[ix + 660 * iy] - dx 104 * (1.0d - dy) * Y[ix + 660 * iy + 1] - dx * dy 105 * Y[ix + 660 * iy + 661] - (1.0d - dx) * dy 106 * Y[ix + 660 * iy + 660] + y) / 2.0d; 107 } 108 return new PointDouble(x, y); 109 } 110 111 112 } 113 114 static class PointDouble { 115 double x, y; 116 117 PointDouble(double x, double y) { 118 this.x = x; 119 this.y = y; 120 } 121 122 public String toString() { 123 return "x=" + x + ", y=" + y; 124 } 125 } 126 127 }