jsp实现的数据库模糊搜索（可以自己设定匹配字符个数）

来源：互联网发布：青岛市淘宝运营招聘编辑：程序博客网时间：2024/05/20 10:24

<%@ page contentType="text/html; charset=GBK" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%request.setCharacterEncoding("GBK");%>
<%
String sqlStr="";
String submit=request.getParameter("Submit");
if(submit!=null&&!submit.equals(""))
{
   String Class_N=request.getParameter("Class_N");
   String search=request.getParameter("search");
   //byte n[]=search.getBytes("ISO-8859-1");
   //search=new String(n);
if(!Class_N.equals("Ename"))
{
    String baijuanli=search;
    int leng=search.length();
    String sql="";
    for(int f=0;f<=leng-2;f++)
    {
   //System.out.println(f+"a");
   for(int i=f+3;i<leng;i++)
   {
     //System.out.println(i+"b");
     search=baijuanli.substring(f,i);//实现字符串分割：以2个字符为最小单位实现字符串分割，也可以根据需要自己进行设置
     System.out.println(search);
     sql=sql+"or "+Class_N+" like '%"+search+"%'";
    }
    }
    sqlStr="select * from EN_School where "+Class_N+" like '%"+baijuanli+"%'"+sql+";";
    out.println(sqlStr);
}
}
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>无标题文档</title>
<script language="JavaScript">
function formcheck(form)
    {
      if(form.search.value=="")
      {
          alert("搜索不能为空!");
          return false;
       }
    if(form.Class_N.value=="")
      {
          alert("搜索条件为空!");
          return false;
       }
}
</script>
</head>
<body>
<form action="search.jsp" method="post" name="form">
<table width="100%" border="0" cellspacing="1">
<tr>
<td width="74">
站内搜索:
</td>
<td width="158">
<input type="text" name="search" size="20" maxlength="25">
</input>
</td>
     <td width="116">
<select name="Class_N" size="1">
      <option value="" selected>
   —请选择—
      </option>
   <option value="Ename">
   学校英文名称
   </option>
   <option value="Cname">
   学校中文名称
   </option>
   <option value="Address">
   学校地址
   </option>
     </select>
     </td>
     <td width="628">
     <input type="submit" name="Submit" value="搜索" onClick="return formcheck(this.form)"></input>
     </td>
</tr>
</table>
</form>
</body>
</html>