?? layerservlet.java
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package com.oyc.mapxtreme.servlet;
import java.io.IOException;
import java.util.Iterator;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.mapinfo.mapj.FeatureLayer;
import com.mapinfo.mapj.LayerType;
import com.mapinfo.mapj.Layers;
import com.mapinfo.mapj.MapJ;
import com.oyc.mapxtreme.util.RenderMap;
/**
* 圖層servlet,控制圖層的顯示
* @author 三峽大學理學院 歐陽超
*
*/
public class LayerServlet extends BaseHttpServlet {
/**
* 顯示所有圖層
*
*/
public void showLayer(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//取出地圖對象
HttpSession session = request.getSession();
MapJ myMap = (MapJ) session.getAttribute("mapj");
//取出圖層對象并放入request
Layers layers = myMap.getLayers();
request.removeAttribute("layers");
request.setAttribute("layers", layers);
super.forward("layer.jsp", request, response);
}
/**
* 更改圖層的狀態
*
*/
public void changeLayer(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//取出地圖對象
HttpSession session = request.getSession();
MapJ myMap = (MapJ) session.getAttribute("mapj");
//遍歷圖層,更改圖層狀態
Layers layers = myMap.getLayers();
String isView = null;
String isSelect = null;
String isLabel = null;
FeatureLayer layer = null;
int i = 0;
for(Iterator iter=layers.iterator(LayerType.ALL); iter.hasNext(); ){
layer = (FeatureLayer) iter.next();
isView = request.getParameter("isView" + i);
isSelect = request.getParameter("isSelect" + i);
isLabel = request.getParameter("isLabel" + i);
//是否可見
if(isView != null && isView.equals("true")){
layer.setEnabled(true);
}else{
layer.setEnabled(false);
}
//是否可選擇
if(isSelect != null && isSelect.equals("true")){
layer.setSelectable(true);
}else{
layer.setSelectable(false);
}
//是否標注
if(isLabel != null && isLabel.equals("true")){
layer.setAutoLabel(true);
}else{
layer.setAutoLabel(false);
}
i++;
}
//渲染地圖對象
try {
RenderMap render = new RenderMap();
render.renderMap(myMap, response);
} catch (Exception e) {
e.printStackTrace();
}
}
}
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