📄 ecminfdel.java
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import java.io.*;
import java.net.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
public class ecmInfDel extends HttpServlet{
int DelCount=0;
String ObjType,OpType;
String isSelect,delCon,dbName,tableName;
ResultSet rs;
tableSql t;
String temp,insert0,delete0,cancel0,update0;
public void init(ServletConfig conf) throws ServletException {
super.init(conf);
}
public void service(HttpServletRequest req,HttpServletResponse resp)
throws ServletException,IOException{
ServletOutputStream out=resp.getOutputStream();
temp="插入";
insert0=new String(temp.getBytes("GBK"),"ISO8859_1");
temp="删除";
delete0=new String(temp.getBytes("GBK"),"ISO8859_1");
temp="取消";
cancel0=new String(temp.getBytes("GBK"),"ISO8859_1");
temp="更改";
update0=new String(temp.getBytes("GBK"),"ISO8859_1");
dbName=req.getParameter("DbName");
tableName=req.getParameter("TableName");
delCon=req.getParameter("Conditions");
if (req.getParameter("DbName").equals("Ecmdb")){;
t = new tableSql("Ecmdb");
}
//WatchParameters(req,out);
//删除所选择记录
if (req.getParameter("IsSelect").equals("select")) {
System.out.println("it will delete selected records");
int i=1;
Enumeration keys;
String kkey,values;
keys=req.getParameterNames();
while (keys.hasMoreElements()) {
kkey=(String)keys.nextElement();
values=req.getParameter(kkey);
if (kkey.startsWith("record")){
DelCount=DelCount+t.recordDelete("delete from "+tableName+" where "+tableName+".num="+values);
System.out.println("delete from "+tableName+" where "+tableName+".num="+values);
}
}
}
//根据输入条件删除记录
if (req.getParameter("IsSelect").equals("noselect")) {
System.out.println("this delete condition is:"+delCon);
DelCount=t.recordDelete("delete from "+tableName+" where "+tableName+"."+delCon);
//System.out.println("delete from ment where comment."+delCon);
}
System.out.println("i go delete table");
resp.setContentType("text/html");
out.println("<HTML>");
out.println("<HEAD><TITLE>Delete Goods</TITLE></HEAD>");
out.println("<BODY bgcolor=\"#f5f5f5\">");
String temp000,temp001;
temp000="请选择你要删除的记录";
temp001=new String(temp000.getBytes("GBK"),"ISO8859_1");
out.println("<hr><B>"+temp001+"</B><BR>");
// out.println("<HR><B>It will delete your select records!</B><BR>");
out.println("<FORM METHOD=POST ACTION=\"/servlet/ecmInfDel\">");
//if (dbName.equals("Sysdb"))
// DispTable("select * from "+tableName,out);
//else
DispTable("select * from "+tableName,out);
out.println("<HR>");
out.println("<INPUT TYPE=\"hidden\" name=\"DbName\" value=\""+dbName+"\">");
out.println("<INPUT TYPE=\"hidden\" name=\"TableName\" value=\""+tableName+"\">");
System.out.println(temp000);
temp000="按所选择的记录删除";
System.out.println(temp000);
temp001=new String(temp000.getBytes("GBK"),"ISO8859_1");
out.println("<INPUT TYPE=\"radio\" NAME=\"IsSelect\" VALUE=\"select\" CHECKED>"+temp001+"<BR>");
temp000="按输入条件删除";
temp001=new String(temp000.getBytes("GBK"),"ISO8859_1");
out.println("<INPUT TYPE=\"radio\" NAME=\"IsSelect\" VALUE=\"noselect\">"+temp001+"<BR>");
//out.println("<INPUT TYPE=\"radio\" NAME=\"IsSelect\" VALUE=\"select\" CHECKED>"+te<BR>");
//out.println("<INPUT TYPE=\"radio\" NAME=\"IsSelect\" VALUE=\"noselect\" >Delete according to input conditions<BR> ");
temp000="请输入你的删除条件";
temp001=new String(temp000.getBytes("GBK"),"ISO8859_1");
// out.println("<hr><b>"+temp001+"</b><br>");
out.println(temp001+" :<INPUT TYPE=TEXT SIZE=20 NAME=\"Conditions\"><BR>");
out.println("<INPUT TYPE=SUBMIT VALUE="+delete0+">");
out.println("<INPUT TYPE=RESET VALUE="+cancel0+">");
out.println("</FORM>");
out.println("<BR><HR>");
if (DelCount>0)
out.println("You have succeed to delete "+DelCount+" records!");
else out.println("You have fail to delete!");
out.println("</BODY></HTML>");
}
public void Destroy(){
t.closeConnect();
}
////display the Parameter and values
public void WatchParameters(HttpServletRequest req,ServletOutputStream out)
throws ServletException,IOException{
int i=1;
Enumeration keys;
String kkey,values;
keys=req.getParameterNames();
while (keys.hasMoreElements()) {
kkey=(String)keys.nextElement();
values=req.getParameter(kkey);
out.println("<P>"+"key: "+kkey+" equals value:"+values);
}
}
public void DispTable(String query,ServletOutputStream out) throws ServletException,IOException{
//out.println("<H1>TABLE RESULTS:</H1>");
out.println("<TABLE BORDER=\"1\" ALIGN=\"CENTER\">");
try{
synchronized(this) {
int i=0,j=0;
String tmpstr,checkbo;
rs=t.recordSql(query);
ResultSetMetaData rsmd=rs.getMetaData();
int numCols=rsmd.getColumnCount();
//display each column title
out.print("<TD>column name");
for(i=1;i<=numCols;i++){
//out.println(new String(name.getBytes("GBK"),"ISO8859_1") );
out.print("<TD>"+new String(rsmd.getColumnLabel(i).getBytes("GBK"),"ISO8859_1") );
System.out.println("display the title");
System.out.println(new String(rsmd.getColumnLabel(i).getBytes("GBK"),"ISO8859_1") );
}
out.println("<TR>");
System.out.println("enter display the table records");
//display each column data
while (rs.next()){
//tmpstr=rs.getString(2);
//out.print("<TD><INPUT TYPE=checkbox NAME=\"record"+i+"\">");
j++;
checkbo=rs.getString(1);
out.print("<TD><INPUT TYPE=\"checkbox\" NAME=\"record"+j+"\""+" value=\""+checkbo+"\">");
out.print("<TD>"+checkbo);
for(i=2;i<=numCols;i++){
tmpstr=rs.getString(i);
if(rs.wasNull())
out.print("<TD>NULL");
else
out.print("<TD>"+new String(tmpstr.getBytes("GBK"),"ISO8859_1") );
}
out.println("<TR>");
}
}
out.println("</TABLE>");
}
catch(SQLException ex){
System.out.println("\n***SQLException caught ***\n");
while (ex != null){
System.out.println("SQLState:"+ex.getSQLState());
System.out.println("Message:"+ex.getMessage());
System.out.println("Vendor:"+ex.getErrorCode());
ex=ex.getNextException();
System.out.println("");
}
out.println("</TABLE>");
}
}
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