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📄 updatenews.java

📁 新闻发布系统
💻 JAVA
字号:
🔍 
package mypackage;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.PrintWriter;
import java.io.IOException;
import java.sql.*;

public class UpdateNews extends HttpServlet 
{
  private static final String CONTENT_TYPE = "text/html; charset=GBK";

  public void init(ServletConfig config) throws ServletException
  {
    super.init(config);
  }

  public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
  {
    response.setContentType(CONTENT_TYPE);
    PrintWriter out = response.getWriter();
    
    //声明变量并初始化
    String id = null;
    String title = null;
    String content = null;
    String date = null;
    String sql = null;
    ConnectionDB db = null;
    ResultSet rs = null;
    
    //输出HTML头
    out.println("<html>");
    out.println("<head><title>UpdateNews</title></head>");
    out.println("<body>");
    out.println("<div align=center><font color=#FF0000 size=6 face=隶书>新闻发布系统</font></div>");
    
    //变量赋值
    id = request.getParameter("id");
    sql = "select * from news where id="+id;
    db = new ConnectionDB();
    rs = db.executeQuery(sql);
    
    //将游标置于结果集第一个结果位置
    try{
      rs.next();
    }
    catch(Exception e){
      System.out.println(e.getMessage());
    }
    
    //输出HTML表单
    out.println("<table width=59%  border=0 align=center cellpadding=2 cellspacing=1 bgcolor=#999999>");
    out.println("<form action=UpdateNewsSave method=post name=form>");
    out.println("<tr>");
    out.println("<td width=79% bgcolor=#FFFFFF>&gt;&gt;更新新闻：</td>");
    out.println("<td width=21% height=23 align=left bgcolor=#FFFFFF>");
    out.println("<a href=Admin>管理首页</a>-<a href=NewsList>新闻首页</a></td>");
    out.println("</tr>");
    out.println("<tr>");
    out.println("<td height=16 bgcolor=#FFFFFF>标题：</td>");
    out.println("<td height=16 bgcolor=#FFFFFF>");
    
    //取出查询结果
    try{
      title = rs.getString("title");
      out.println("<input name=title type=text size=30 value='"+title+"'>");
    }
    catch(Exception e){
      System.out.println(e.getMessage());
    }
    
    out.println("</td>");
    out.println("</tr>");
    out.println("<tr>");
    out.println("<td bgcolor=#FFFFFF width=104 height=58>内容：</td>");
    out.println("<td bgcolor=#FFFFFF width=471 valign=middle height=58>");
    out.println("<table width=98% border=0 cellspacing=0 cellpadding=0>");
    out.println("<tr>");
    out.println("<td width=70% height=59><textarea name=content cols=60 rows=15>");
    
    try{
      content = rs.getString("content");
      out.println(content);
    }
    catch(Exception e){
      System.out.println(e.getMessage());
    }
    
    out.println("</textarea></td>");
    out.println("</tr>");
    out.println("</table></td>");
    out.println("</tr>");
    out.println("<tr align=center>");
    out.println("<td colspan=2 bgcolor=#FFFFFF><input name=Submit type=submit value=更新>&nbsp;&nbsp;<input name=Submit1 type=reset value=重置></td>");
    out.println("</tr>");
    out.println("<input name=id type=hidden value='"+id+"'>");
    out.println("</form>");
    out.println("</table>");
    out.println("</body></html>");
    out.close();
  }
}

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