viewdepartlistaction.java

此资源是jsp应用开发 邓子云等编写的一书里的源代码

package action;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;

/**
 * @author dengziyun
 * 进入部门管理页面的Action类
 */
public class viewDepartListAction extends Action{
	
	/**
	 * 在此方法中处理HTTP请求，并作响应
	 */
	public ActionForward execute(ActionMapping arg0, ActionForm arg1,
			HttpServletRequest request, HttpServletResponse reponse) throws Exception {
		ActionErrors errors=new ActionErrors();
	  	//------构造查询的SQL语句------
		String sqlStr1="select count(*) as recordCount from department";
	  	String sqlStr2="select * from department";
	  	//------查询出数据，将查询结果数据集写入到request中------
	  	try{
			//------得到数据库连接------
			Context initCtx = new InitialContext(); 
			Context ctx = (Context) initCtx.lookup("java:comp/env");
			Object obj = (Object) ctx.lookup("jdbc/sqlserver");
			DataSource ds = (javax.sql.DataSource)obj;
			Connection conn = ds.getConnection();
			//------查询数据------
		  	Statement sql1=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);
		  	ResultSet rs1=sql1.executeQuery(sqlStr1);
		  	if(rs1.next()){
		  		Object[][] rsArray1=new Object[rs1.getInt("recordCount")][2];
		  		Statement sql2=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);
			  	ResultSet rs2=sql2.executeQuery(sqlStr2);
			  	int i=0;
			  	while(rs2.next()){
			  		rsArray1[i][0]=rs2.getString("departmentId");
			  		rsArray1[i][1]=rs2.getString("departmentName");
			  		i++;
			  	}
			  	request.setAttribute("rsArray1",rsArray1);
		  	}
		  	//------关闭数据库连接------
		  	if(conn!=null)
		  		conn.close();
		}catch(Exception e){
			e.printStackTrace();
			errors.add("DBOPError",new ActionMessage("DBOPError"));
			saveErrors(request,errors);
		}
		return arg0.findForward("enterDepartJSP");
	}
}