ArcSDE SDK介绍
对广大用户来说，ArcSDE SDK对用户来说一直是比较神秘的，因为ArcSDE SDK只在ArcSDE9.3的光盘上跟ArcSDE安装介质整合到一块，也就是在这个版本被用户所熟知和使用，但是从ArcSDE9.3.1版本又神秘的失踪了，这让很多用户对ArcSDE SDK的神秘性很是好奇，而且还有不少用户也钟情于使用ArcSDE SDK。
Tips：目前比较流行的开发手段包括：
- ArcGIS Engine\ArcObject
- SQL操作ST_Geometry
- ArcSDE SDK
- Web API
- Mobile API
- Other
如果是ArcGIS Engine、ArcObject开发是名门正派的话，SQL操作和SDK就属于旁门左道，毕竟后两者的开发需要开发人员比较深厚的编程能力、数据库能力以及ArcSDE的深入了解等，那么就介绍一下ArcSDE SDK。
ArcSDE SDK跟ArcSDE是可以类比的，这个类比就是开发需要版本相一致，而且ArcSDE SDK也是分64Bit和32Bit的，而且ArcSDE SDK也包括C API和Java API两种
Tips：从上面的内容我们可以获得，如果ArcSDE打上相关的SP补丁，那么ArcSDE SDK也同步即可
既然SDK分32Bit和64Bit，那么编译器的位数最好也与SDK一致
先把ArcSDE SDK的帮助文档呈现给大家：http://help.arcgis.com/en/geodatabase/10.0/sdk/arcsde/welcome.htm
该帮助文档包括：概念介绍、API介绍、典型例子：
Tips：这里的概念最经典的就是对版本的介绍，大家可以看看，这可是在ArcGIS桌面帮助里面找不到的
- Database connections
- Geometry (Coordinate reference, coordinate systems and projections, types of shapes, spatial reference systems)
- Log files
- Rasters
- Schema objects (Tables, Layers, Locking)
- Unicode support
- Versioning
- XML
1：可以进行ArcSDE的数据连接（完全废话）、那么也可以进行版本的相关操作、ArcSDE实例的管理
2：矢量数据的操作（编辑、查询、投影修改等）
3：影像数据的操作
4：ArcSDE Schema的操作
5：其他用户用的比较少的比如log files、XML等
Tips：其实不管是使用SQL操作还是SDK，相关的操作对象都是简单对象（点、线、面），那么如果你还有复杂对象的话，那只能使用ArcGIS Engine或者ArcObject了，这是用户在选择开发方式需要结合自己的项目需求来自行评定的。
以Java API做一个简单描述
ArcSDE Java API提供了一个开放的、高层次的编程接口，以处理与分析空间信息。它包含了三个java包：Client包、Geometry包、以及Projection包。
下面的主题对ArcSDE Java API的功能进行了大体的介绍。
如果安装完毕ArcSDE SDK，会自动安装在ArcSDE的目录下：%SDEHOME%=C:\Program Files\ArcGIS\ArcSDE\ora11gexe
那么最主要的有C:\Program Files\ArcGIS\ArcSDE\lib和C:\Program Files\ArcGIS\ArcSDE\bin，相关的dll和Jar文件
- Client包提供了实现ArcSDE服务器相关的功能的类。利用这个包建立的应用程序，能建立一个到ArcSDE实例的连接，查询一个层，或者与ArcSDE服务器进行通讯。
- Geometry包提供了实现OGC（开源GIS）几何学功能接口的类。
- Projection包提供了定义一个坐标系统与在不同坐标系统中转换的功能的类。
如果安装完毕ArcSDE SDK，会自动安装在ArcSDE的目录下：%SDEHOME%=C:\Program Files\ArcGIS\ArcSDE\ora11gexe
那么最主要的有C:\Program Files\ArcGIS\ArcSDE\lib和C:\Program Files\ArcGIS\ArcSDE\bin，相关的dll和Jar文件
During ArcSDE client installation, the following files are installed:
| File | Description |
| jsde_sdk.jar | Contains the ArcSDE Client, and Geometry Java API class files. |
| jpe_sdk.jar | Contains the ArcSDE Projection Engine Java API class files. |
| concurrent.jar | Provides standardized, efficient versions of utility classes commonly encountered in concurrent Java programming. |
| icu4j_3_2.jar | ICU4J libraries required for globalization. |
以上是相关的jar包介绍，那么我在搭建相关环境需要注意什么呢？
UNIX Windows
Set the SDEHOME environment variable to the ArcSDE home directory, and include the %SDEHOME%/bin in the PATH environment variable. Also set the ORACLE_HOME environment variable.
The following DLLs are required for direct connect support.
| File | Description |
| sdejavautil.dll | This modules contains the ArcSDE direct connect library functions. |
| gsrvr*93.dll | This modules contains the ArcSDE direct connect library functions. |
| sde*gsrvr93.dll | This modules contains the ArcSDE direct connect library functions. |
| sde.dll | This modules contains the ArcSDE client library functions. |
| sg.dll | This modules contains the ArcSDE shape library functions. |
| pe.dll | This modules contains the ArcSDE pe library functions. |
| xerces*.dll | This modules contains the XML parser library functions. |
| icu*.dll | This modules contains the Unicode support library functions. |
以上是相关的bin文件介绍，windows 和非Windows不一样，非windows需要在bash_profile和profile文件里面进行引用。
以Windows操作系统、Eclipse为例：
注意：确保SDK位数和Eclipse位数一致
1：将SDK的bin 文件里面的dll拷贝到%SDHOME%/bin文件里面，注意这两个路径，这样就可以在环境变量引用SDK的dll了
2：在Eclipse里创建新工程时，引用jar包
剩下的如果你熟悉Java开发，就开始吧...
在开发过程中还是多看看相关的帮助，ArcGIS的帮助做的一直非常好，比如我们需要了解一下查询的开发
从查看API很容易看到SeQuery，当我们打开该API，帮助就会给我们提供开发查询的具体步骤：
Used to submit a query to an ArcSDE instance.
A typical SeQuery operation sequence is:
1) Create an SeQuery.
2) Prepare the query.
3) Execute a statement or spatial query.
4) Fetch a single SeRow from the SeQuery.
5) Retrieve column values and feature geometry from the fetched SeRow.
6) Close the SeQuery at the end of a series of fetches.
A typical SeQuery operation sequence is:
1) Create an SeQuery.
2) Prepare the query.
3) Execute a statement or spatial query.
4) Fetch a single SeRow from the SeQuery.
5) Retrieve column values and feature geometry from the fetched SeRow.
6) Close the SeQuery at the end of a series of fetches.
那么我们在开发过程中就非常方便了。
开发参考：http://blog.csdn.net/warrenwyf/article/category/705061
附赠相关的代码参考
package lish.test;
import com.esri.sde.sdk.client.*;
import com.esri.sde.sdk.client.SeTable.*;
import java.util.Vector;
public class test {
private static SeConnection conn = null;
private static String server = "192.168.205.142";
private static String instance = "5353";
private static String database = "";
private static String username = "sde";
private static String password = "sde";
//获得ArcSDE连接
private static SeConnection getConn() {
if (conn == null) {
try {
conn = new SeConnection(server, instance, database, username,
password);
} catch (SeException ex) {
ex.printStackTrace();
}
}
return conn;
}
/**
* @param args
*/
public static void main(String[] args) {
GetArcSDEInfo();
}
//ArcSDE管理
public static void GetArcSDEInfo()
{
try
{
SeInstance instance = new SeInstance(server, "5353");
SeInstance.SeInstanceStatus status = instance.getStatus();
System.out.println("连接数："+status.getNumConnections());
System.out.println("可以连接："+status.isAccepting());
System.out.println("------------------------------------------------");
SeInstance.SeInstanceConfiguration config = instance.getConfiguration();
System.out.println("最大连接数："+config.getMaxConnections());
System.out.println("------------------------------------------------");
SeInstance.SeInstanceStats[] stats=instance.getStats();
for (int i=0;i<stats.length;i++)
{
System.out.println("操作数："+stats[i].getOperationCount());
}
System.out.println("------------------------------------------------");
SeInstance.SeInstanceUsers[] users=instance.getUsers();
for(int j=0;j<users.length;j++)
{
System.out.println("用户名："+users[j].getUserName());
System.out.println("系统名："+users[j].getSysName());
System.out.println("服务器开始时间："+users[j].getServerStartTime());
System.out.println("服务器PID："+users[j].getServerPid());
System.out.println("*****************************");
}
System.out.println("------------------------------------------------");
System.out.println("系统名："+instance.getServerName());
System.out.println("------------------------------------------------");
System.out.println("------------------------------------------------");
SeInstance.SeInstanceTableLocks[] tablelocks=instance.getTableLocks();
for(int i=0;i<tablelocks.length;i++)
{
System.out.println("表级别锁类型："+tablelocks[i].getLockType());
System.out.println("表级别锁PID："+tablelocks[i].getPid());
System.out.println("表级别锁注册ID："+tablelocks[i].getRegistrationId());
System.out.println("*****************************");
}
System.out.println("------------------------------------------------");
}
catch (SeException e) { e.printStackTrace(); }
}
//空间条件查询
public static void SpatialQuery()
{
try {
SeConnection conn = getConn();
SeLayer layer = new SeLayer(conn,"quxian","SHAPE");
SeTable table = new SeTable(conn, "quxian");
SeColumnDefinition[] tableDef = table.describe();
String[] cols = new String[tableDef.length];
for (int j = 0; j < cols.length; j++)
{
cols[j] = tableDef[j].getName();
}
SeCoordinateReference cr = layer.getCoordRef();
SeFilter[] filters = new SeFilter[1];
SeShape shape = new SeShape(cr);
shape.generateFromText("POLYGON((125.091 44.324,125.070 43.428,125.887 44.027,125.091 44.324))");
//SDEPoint pt = new SDEPoint(125.091,44.324);
//shape.generatePoint(1, new SDEPoint[] { pt });
SeFilter filter = new SeShapeFilter(layer.getName(), layer
.getSpatialColumn(), shape, SeShapeFilter.METHOD_ENVP);
filters[0] = filter;
SeSqlConstruct sqlCons = new SeSqlConstruct(layer.getName());
SeQuery query = new SeQuery(conn, cols, sqlCons);
query.prepareQuery();
query.setSpatialConstraints(SeQuery.SE_OPTIMIZE, false,filters);
query.execute();
SeRow row =query.fetch();
while(row!=null)
{
System.out.println(row.getObject(1).toString());
row =query.fetch();
}
}
catch (Exception ex) {
ex.printStackTrace();
}
}
//属性条件查询
public static void AttributeQuery()
{
try {
SeConnection conn = getConn();
SeTable table = new SeTable(conn, "quxian");
SeColumnDefinition[] tableDef = table.describe();
String[] cols = new String[tableDef.length];
for (int j = 0; j < cols.length; j++)
{
cols[j] = tableDef[j].getName();
}
SeSqlConstruct sqlCons = new SeSqlConstruct("quxian");
sqlCons.setWhere("CITY='长春市'");
SeQuery query = new SeQuery(conn, cols, sqlCons);
query.prepareQuery(cols,sqlCons);
query.execute();
SeRow row =query.fetch();
while(row!=null)
{
System.out.println(row.getObject(1).toString());
System.out.println(row.getObject(4).toString());
row =query.fetch();
}
}
catch (Exception ex) {
ex.printStackTrace();
}
}
//普通查询
public static void CommonQuery()
{
try {
SeConnection conn = getConn();
SeTable table = new SeTable(conn, "conn");
SeColumnDefinition[] tableDef = table.describe();
String[] cols = new String[tableDef.length];
for (int j = 0; j < cols.length; j++)
{
cols[j] = tableDef[j].getName();
}
SeSqlConstruct sqlCons = new SeSqlConstruct("conn");
SeQuery query = new SeQuery(conn, cols, sqlCons);
SeQueryInfo queryInfo = new SeQueryInfo();
queryInfo.setQueryType(SeQueryInfo.SE_QUERYTYPE_ATTRIBUTE_FIRST);
queryInfo.setColumns(cols);
queryInfo.setConstruct(sqlCons);
query.prepareQueryInfo(queryInfo);
query.execute();
SeRow row =query.fetch();
while(row!=null)
{
System.out.println(row.getObject(0).toString());
row =query.fetch();
}
}
catch (Exception ex) {
ex.printStackTrace();
}
}
//获得ArcSDE版本信息
public static void GetVersion()
{
SeConnection conn =getConn();
SeRelease release=conn.getRelease();
System.out.println(release.getBugFix());
System.out.println(release.getDesc());
System.out.println(release.getRelease());
System.out.println(release.getMajor());
System.out.println(release.getMinor());
}
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