sde是Spatial Database Engine简写,中文全称:空间数据库引擎。
SDE是一种客户/服务器软件,可使空间数据在工业标准的数据库管理系统中存储、管理和快速查询检索。把GIS数据放在RDBMS中,但是一般的RDBMS都没有提供GIS的数据类型(如点、线、多边形、以及这些feature之间的拓扑关系和投影坐标等相关信息),RDBMS只提供了少量的数据类型支持:int,float,double,Blob,Long ,char等,一般都是数字,字符串和二进制数据几种。并且RDBMS不仅没有提取对GIS数据类型的存储,也没有提供对这些基础类型的操作(如:判断包含关系,相邻、相交、求差、距离、最短路径等)
JAVA对sde操作,首先需要下载sde支持的jar包。jpe_sdk.jar和jsde_sdk.jar两个包,这两个包可以从安装的目录下找到。c:/arcgis/server10.0/java/lib/sde/
下面是java获的sde的链接代码:
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/** * 连接sde服务 * @return */ public SeConnection getConnection () { SeConnection conn = null ; try { conn = new SeConnection(SDE_SERVER_IP, SDE_PROT, SDE_DATEBASE_SID, SDE_USERNAME, SDE_PASSWORD); } catch (SeException e) { return null; } return conn; }
?对sde数据进行添加,点线面的新增
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/** * 添加资源信息点到sde中 * @param pointBean 坐标点 POJO * @param tbName 图层名称 * @param String typeName 所画的类型 1 点 2 线 3 面 * @return Long sde的id * @throws Exception */ public Long addPointObject(PointBean pointBean, List columnList, String tableName, String typeName) throws Exception { SeLayer insertLayer = null; SeConnection conn = null; Long intsertRowID = null; SeInsert insert = null; try { conn = this.getConnection(); insertLayer = new SeLayer( conn, tableName, "SHAPE"); if (insertLayer == null) { throw new Exception("找不到空间表:" + tableName); } conn.startTransaction(); int arrayLength = columnList.size() + 1 ; String[] cols = new String[arrayLength]; cols[0] = "SHAPE"; for (int i = 0 ;i<columnList.size() ; i++) { ColumnBean columnBean = (ColumnBean)columnList.get(i); cols[i+1] = columnBean.getName(); } insert = new SeInsert(conn); insert.intoTable(insertLayer.getName(), cols); insert.setWriteMode(true); SeCoordinateReference coordref = (SeCoordinateReference) insertLayer.getCoordRef(); SeShape shape = new SeShape(coordref); if ("1".equals(typeName)) { this.addPoint(pointBean, shape); } else if ("2".equals(typeName)) { this.addLine(pointBean, shape); } else if ("3".equals(typeName)) { this.addPolygon(pointBean, shape); } SeRow row = insert.getRowToSet(); row.setShape(0, shape); for (int i = 0 ;i<columnList.size() ; i++) { ColumnBean columnBean = (ColumnBean)columnList.get(i); if (columnBean.getTypeObject() == 1) { row.setNString(i+1, String.valueOf(columnBean.getValObject())); } else if (columnBean.getTypeObject() == 2) { row.setInteger(i+1, Integer.parseInt(columnBean.getValObject().toString())); }else if (columnBean.getTypeObject() == 3) { row.setDouble(i+1, Double.parseDouble(columnBean.getValObject().toString())); } } insert.execute(); intsertRowID = new Long(insert.lastInsertedRowId().longValue()); conn.commitTransaction(); } catch (Exception ex) { ex.printStackTrace(); conn.rollbackTransaction(); } finally { if (insert != null) { insert.close(); } if (conn != null) { conn.close(); } } return intsertRowID; }
?sde查询接口实现
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/** * 查询sde * @param productId 产品id * @throws SeException */ public SeQuery searchSde (Long productId, String tableName) throws SeException { SeConnection conn = getConnection(); SeLayer layer = new SeLayer( conn, tableName, "SHAPE"); SeSqlConstruct sqlConstruct = new SeSqlConstruct(layer.getName()); if (productId != null) {