用java实现清空组合框 *** 作

根据不同情况设置表单中的表单项的innerHTML或者value值如<div></div>就用innerHTML文本框就用value可以用<input

type="text"

class="inputgri"

name="username"

valve

=

<%=

request.getAttribute("computers")>/>直接写在JSP页面中其他还有很多方法.不过在这之前你需要将值放进request中.

简单实现代码如下：

EmployeeDao.java

//删除数据

public boolean deleteEmployeeById(int id){

boolean result = false

try{

con = DBCon.getConn()

String sql = "delete from tb_employee where id=?"

pstmt = (PreparedStatement) con.prepareStatement(sql)

pstmt.setInt(1, id)

int i = pstmt.executeUpdate()

if(i == 1)

result = true

}catch(Exception e){

e.printStackTrace()

}finally{

try{

if(pstmt != null){

pstmt.close()

}

}catch(Exception e){

e.printStackTrace()

}

try{

if(con != null){

con.close()

}

}catch(Exception e){

e.printStackTrace()

}

}

return result

}

TestSql2.java

package com.sql.test

import com.sql.dao.EmployeeDao

public class TestSql02 {

public static void main(String[] args){

boolean result = EmployeeDao.getInstance().deleteEmployeeById(1)

if(result == true){

System.out.println("删除成功!")

}else{

System.out.println("删除失败!")

}

}

}

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