delthingaction.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 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
 * 删除一个审批事务的Action类
 */
public class delThingAction 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 response) throws Exception {
		ActionErrors errors=new ActionErrors();
		//------接收请求参数------
		String thingId=request.getParameter("thingId");
	  	//------构造查询的SQL语句------
	  	String sqlStr1="delete from thing where thingId="+thingId;
	  	String sqlStr2="delete from thingArra where thingId="+thingId;
	  	//------查询出数据，将查询结果数据集写入到response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------
			java.sql.Statement sql=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
			sql.executeUpdate(sqlStr1);
			sql.executeUpdate(sqlStr2);
		  	//------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);
			System.out.println(e);
		}
		return arg0.findForward("viewThingListdo");
	}
}