场景

Java中使用JTS实现WKT字符串读取转换线、查找LineString的list中距离最近的线、LineString做缓冲区扩展并计算点在缓冲区内的方位角：

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/132755202

WKB介绍

WKB(Well-Known Binary) 用二进制流 描述几何对象信息。

WKB比WKT的优势在于WKB是二进制,主要是解决传输和存储的效率问题，

所以MySQL,Postgre数据存储Geometry类型的数据，存储的值是WKB格式的

WKB 使用 1 字节无符号整数、4 字节无符号整数和 8 字节双精度数（IEEE 754 格式）。一个字节是八位。

Mysql中查询存储WKB值示例：

SELECT hex(st_asbinary(st_geomfromtext('POINT(1 2)')))

注：

博客：
https://blog.csdn.net/badao_liumang_qizhi

实现

1、WKB相关操作api

2、WKB输出数据并转换为字符串

        GeometryFactory geometryFactory = new GeometryFactory();
        Point point1 = geometryFactory.createPoint(new Coordinate(112.11,2225.21));
        WKBWriter wkbWriter = new WKBWriter();
        byte[] write = wkbWriter.write(point1);

        String hex = WKBWriter.toHex(write);
        System.out.println(hex);

以上结果输出：

0000000001405C070A3D70A3D740A1626B851EB852

3、WKB数据读取

        WKBReader wkbReader = new WKBReader();
        Geometry geometry = null;
        try {
            geometry = wkbReader.read(write);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        System.out.println(geometry.toText());

完整示例：

        //WKB输出数据
        GeometryFactory geometryFactory = new GeometryFactory();
        Point point1 = geometryFactory.createPoint(new Coordinate(112.11,2225.21));
        WKBWriter wkbWriter = new WKBWriter();
        byte[] write = wkbWriter.write(point1);

        String hex = WKBWriter.toHex(write);
        System.out.println(hex);
        //0000000001405C070A3D70A3D740A1626B851EB852

        WKBReader wkbReader = new WKBReader();
        Geometry geometry = null;
        try {
            geometry = wkbReader.read(write);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        System.out.println(geometry.toText());
        //POINT (112.11 2225.21)