java操作oracle空间信息介绍(SDE)

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。jpe92_sdk.jar和jsde92_sdk.jar两个包，这两个包可以从安装的目录下找到。

下面是java获的sde的链接代码：

/**
* 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

/**
* 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

/**
* 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) {
sqlConstruct.setWhere("yid="+productId.intValue());
}
String[] cols = null;
if (tableName.equals("YU_AN_POINT") || tableName.equals("FANG_AN_POINT")) {
cols = new String[4];
cols[0] = new String("OBJECTID");
cols[1] = layer.getSpatialColumn();
cols[2] = new String("NAME");
cols[3] = new String("IMAGETYPE");
} else {
cols = new String[3];
cols[0] = new String("OBJECTID");
cols[1] = layer.getSpatialColumn();
cols[2] = new String("NAME");
}
System.out.println("cols.length : " + cols.length);
SeQuery query = new SeQuery(conn, cols, sqlConstruct );
query.prepareQuery();
query.execute();
return query;
}

SDE信息删除操作

/**
*
* 删除 通过列对应的值
* @param id     值
* @param column 列
* @param tbName 表名
* @throws SeException
*/
public void deletePointObject(String id, String column, String tbName) throws SeException {
SeConnection conn = null;
SeLayer layer = null;
SeDelete delete = null;
try {
conn = this.getConnection();
layer = new SeLayer(conn, tbName, "SHAPE"); // 得到对应图层
if (layer == null) {
throw new Exception("找不到空间表：" + tbName);
}
conn.startTransaction();
delete = new SeDelete(conn);
delete.fromTable(layer.getName(), column + "='" + id+"'");
conn.commitTransaction();
} catch (Exception ex) {
conn.rollbackTransaction();
} finally {
if (delete != null) {
try {
delete.close();
} catch (SeException e) {
e.printStackTrace();
throw e;
} finally {
if (conn != null) {
conn.close();
}
}
}
}
}