java--Servlet连接SQLserver+html页面

使用Tomcat作为Web服务器和Servlet容器,使用SQL Server/MySQL作为数据服务器,从浏览器端发起对Servlet的调用,完成如下任务:
(1)向scores表中插入新的记录,表示录入新学生信息;(注意:学号为主键,插入学号相同的学生要提示错误;如果学号由数据库自动生成除外)
(2)批量录入成绩,即:在一个界面上列出所有学生信息,在同一个界面上成绩还可以重新录入;录入部分或者全部学生成绩后,提交,将所有成绩写入scores表。(没有录入的成绩,可以暂定为0写入scores表)
使用的静态html页面和动态Servlet的个数没有限制。

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<table>
	<tr>
		<td><a href="searchall">查询全部+修改成绩</a></td>
	</tr>
</table>

<table>
	<tr>
		<td><a href="InsertAndSearch">查询全部+批量录入(包括成绩)</a></td>
	</tr>
</table>

<table>
	<tr>
		<td><a href="InsertAndSearchTwo">查询全部+批量录入(不包括成绩)</a></td>
	</tr>
</table>

<table>
	<tr>
		<td><a href="deleteall">全部删除</a></td>
	</tr>
</table>


<table>
	<tr>
		<td><a href="quanb">shishi</a></td>
	</tr>
</table>

</body>
</html>

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
    <%@page import="java.util.List"%>
    <%@page import="TheStudent.Student"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<body>
	<table align="center" width="400" border="1">
		<tr>
			<td align="center" colspan="5">
				<h2>所有学生信息</h2>
			</td>
		</tr>
		<tr align="center">
			<td><b>学号</b></td>
			<td><b>姓名</b></td>
			<td><b>性别</b></td>
			<td><b>成绩</b></td>
			<td><b>修改成绩</b></td>
		</tr>
		<%
			// 获取图书信息集合
			List<Student> list=(List<Student>)request.getAttribute("list");
		
			if(list==null || list.size()<1){
				out.print("没有 数据!");
			}
			else{
				
				for(Student student:list){
					%>
					<tr align="center">
						<td><%=student.getId() %></td>
						<td><%=student.getName() %></td>
						<td><%=student.getSex() %></td>
						<td><%=student.getGrade() %></td>
						<td>
							<form action="Alter" method="post" οnsubmit="return check(this);">
								<input name="id" id="id" type="hidden" value=<%=student.getId() %>>
								<input name="grade" id="grade" type="text" size="5"/>
								<input type="submit" value="修 改">
							</form>
						</td>
					</tr>
					<%
				}
			}
		%>
	</table>
	
	<a href="Start.html">返回上一目录</a>
</body>
</html>


<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
    <%@page import="java.util.List"%>
    <%@page import="TheStudent.Student"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<table align="center" width="500" border="1">
	<form action="InsertTwo" method="post" οnsubmit="return check(this);">
		<tr>
			<td align="center" colspan=7">
				<h2><b>录入信息</b></h2>
			</td>
		</tr>
		<tr align="center">
			<td><b>学号</b></td>
			<td><input name="id" id="id" type="text" size="4"/></td>
			
			<td><b>姓名</b></td>
			<td><input name="name" id="name" type="text" size="6"/> </td>
			 
			<td><b>性别</b></td>
			<td><input name="sex" id="sex" type="text" size="4"/></td>
			<td><input name="Submit" type="submit" value="添加" οnclick=getParameter></td>
		</tr>
</table>



<table align="center" width="500" border="1">
		<tr>
			<td align="center" colspan="4">
				<h2>所有学生信息</h2>
			</td>
		</tr>
		<tr align="center">
			<td><b>学号</b></td>
			<td><b>姓名</b></td>
			<td><b>性别</b></td>
			<td><b>成绩</b></td>
		</tr>
		<%
			// 获取图书信息集合
			List<Student> list=(List<Student>)request.getAttribute("list");
		
			if(list==null || list.size()<1){
				out.print("没有 数据!");
			}
			else{
				for(Student student:list){
					%>
					<tr align="center">
						<td><%=student.getId() %></td>
						<td><%=student.getName() %></td>
						<td><%=student.getSex() %></td>
						<td><%=student.getGrade() %></td>
					</tr>
					<%
				}
			}
		%>
	</table>
		
	<a href="Start.html">返回上一目录</a>
</body>
</html>


<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
    <%@page import="java.util.List"%>
    <%@page import="TheStudent.Student"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>

<table align="center" width="500" border="1">
	<form action="Insert" method="post" οnsubmit="return check(this);">
		<tr>
			<td align="center" colspan="9">
				<h2><b>录入信息</b></h2>
			</td>
		</tr>
		<tr align="center">
			<td><b>学号</b></td>
			<td><input name="id" id="id" type="text" size="4"/></td>
			
			<td><b>姓名</b></td>
			<td><input name="name" id="name" type="text" size="6"/> </td>
			 
			<td><b>性别</b></td>
			<td><input name="sex" id="sex" type="text" size="4"/></td>
			
			<td><b>成绩</b></td>
			<td><input name="grade" id="grade" type="text" size="4"/></td>
			<td><input name="Submit" type="submit" value="添加" οnclick=getParameter></td>
		</tr>
</table>
		
<table align="center" width="500" border="1">
		<tr>
			<td align="center" colspan="4">
				<h2>所有学生信息</h2>
			</td>
		</tr>
		<tr align="center">
			<td><b>学号</b></td>
			<td><b>姓名</b></td>
			<td><b>性别</b></td>
			<td><b>成绩</b></td>
		</tr>
		<%
			// 获取图书信息集合
			List<Student> list=(List<Student>)request.getAttribute("list");
		
			if(list==null || list.size()<1){
				out.print("没有 数据!");
			}
			else{
				for(Student student:list){
					%>
					<tr align="center">
						<td><%=student.getId() %></td>
						<td><%=student.getName() %></td>
						<td><%=student.getSex() %></td>
						<td><%=student.getGrade() %></td>
					</tr>
					<%
				}
			}
		%>
	</table>
	<a href="Start.html">返回上一目录</a>
</body>
</html>

package TheStudent;

public class Student {
	private int id;
	private String name;
	private String sex;
	private int grade;
	
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	//---------
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	//---------
	public String getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	//---------------
	public int getGrade() {
		return grade;
	}
	public void setGrade(int grade) {
		this.grade = grade;
	}
}
package TheStudent;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class searchall
 */
@WebServlet("/searchall")
public class searchall extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public searchall() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
//		response.getWriter().append("Served at: ").append(request.getContextPath());
		try {
			Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
			String url = "jdbc:sqlserver://localhost:1433;databaseName = Student";
			String username = "sa";
			String password = "123456";
			
			Connection conn = DriverManager.getConnection(url, username, password);
			Statement stmt = conn.createStatement();

			String sql = "select * from score";
			ResultSet rs = stmt.executeQuery(sql);

			List<Student> list = new ArrayList<Student>();

			while (rs.next()) {
				Student stu= new Student();

				stu.setId(rs.getInt("学号"));
				stu.setName(rs.getString("姓名"));
				stu.setSex(rs.getString("性别"));
				stu.setGrade(rs.getInt("得分"));
				
				list.add(stu);
			}
			request.setAttribute("list", list);

			rs.close(); 
			stmt.close();
			conn.close();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		}
		request.getRequestDispatcher("searchall.jsp").forward(request, response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}

package TheStudent;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class InsertTwo
 */
@WebServlet("/InsertTwo")
public class InsertTwo extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public InsertTwo() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
//		response.getWriter().append("Served at: ").append(request.getContextPath());
		request.setCharacterEncoding("utf-8"); //1
		response.setContentType("text/html;charset=utf-8");//2
		response.setCharacterEncoding("utf-8"); //3
		PrintWriter out =response.getWriter();
//====================================================================================
		try {
			Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
			String url = "jdbc:sqlserver://localhost:1433;databaseName = Student";
			String username = "sa";
			String password = "123456";
			
			Connection conn = DriverManager.getConnection(url, username, password);
			Statement stmt = conn.createStatement();
			ResultSet rs = null;
	//---------------------------------------------------------		
			String id = request.getParameter("id"); 
			int idit = Integer.parseInt(id); 
			String name = request.getParameter("name");
			String sex = request.getParameter("sex");
	//---------------------------------------------------------
			rs=stmt.executeQuery("select * from score where 学号="+idit);
			if(rs.next())
			{
				out.println("学号已经存在
"
); System.out.println("学号已经存在"); rs.close(); stmt.close(); conn.close(); } else { Object insert=stmt.execute("insert into score (学号,姓名,性别)values('"+idit+"','"+name+"','"+sex+"')"); rs.close(); stmt.close(); conn.close(); request.getRequestDispatcher("InsertAndSearchTwo").forward(request, response); } } catch (SQLException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }
package TheStudent;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class InsertAndSearchTwo
 */
@WebServlet("/InsertAndSearchTwo")
public class InsertAndSearchTwo extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public InsertAndSearchTwo() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
//		response.getWriter().append("Served at: ").append(request.getContextPath());
		try {
			Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
			String url = "jdbc:sqlserver://localhost:1433;databaseName = Student";
			String username = "sa";
			String password = "123456";
			
			Connection conn = DriverManager.getConnection(url, username, password);
			Statement stmt = conn.createStatement();

			String sql = "select * from score";
			ResultSet rs = stmt.executeQuery(sql);

			List<Student> list = new ArrayList<Student>();

			while (rs.next()) {
				Student stu= new Student();

				stu.setId(rs.getInt("学号"));
				stu.setName(rs.getString("姓名"));
				stu.setSex(rs.getString("性别"));
				stu.setGrade(rs.getInt("得分"));
				
				list.add(stu);
			}
			request.setAttribute("list", list);

			rs.close(); 
			stmt.close();
			conn.close();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		}
		request.getRequestDispatcher("InsertAndSearchTwo.jsp").forward(request, response);
		
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}

package TheStudent;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class InsertAndSearch
 */
@WebServlet("/InsertAndSearch")
public class InsertAndSearch extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public InsertAndSearch() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
//		response.getWriter().append("Served at: ").append(request.getContextPath());
		try {
			Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
			String url = "jdbc:sqlserver://localhost:1433;databaseName = Student";
			String username = "sa";
			String password = "123456";
			
			Connection conn = DriverManager.getConnection(url, username, password);
			Statement stmt = conn.createStatement();

			String sql = "select * from score";
			ResultSet rs = stmt.executeQuery(sql);

			List<Student> list = new ArrayList<Student>();

			while (rs.next()) {
				Student stu= new Student();

				stu.setId(rs.getInt("学号"));
				stu.setName(rs.getString("姓名"));
				stu.setSex(rs.getString("性别"));
				stu.setGrade(rs.getInt("得分"));
				
				list.add(stu);
			}
			request.setAttribute("list", list);

			rs.close(); 
			stmt.close();
			conn.close();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		}
		request.getRequestDispatcher("InsertAndSearch.jsp").forward(request, response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}

package TheStudent;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class Insert
 */
@WebServlet("/Insert")
public class Insert extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public Insert() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		request.setCharacterEncoding("utf-8"); //1
		response.setContentType("text/html;charset=utf-8");//2
		response.setCharacterEncoding("utf-8"); //3
		PrintWriter out =response.getWriter();
//====================================================================================
		try {
			Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
			String url = "jdbc:sqlserver://localhost:1433;databaseName = Student";
			String username = "sa";
			String password = "123456";
			
			Connection conn = DriverManager.getConnection(url, username, password);
			Statement stmt = conn.createStatement();
			ResultSet rs = null;
	//---------------------------------------------------------		
			String id = request.getParameter("id"); 
			int idit = Integer.parseInt(id); 
			String name = request.getParameter("name");
			String sex = request.getParameter("sex");
			String grade = request.getParameter("grade");
			int gradeit = Integer.parseInt(grade);
	//---------------------------------------------------------
			rs=stmt.executeQuery("select * from score where 学号="+idit);
			if(rs.next())
			{
				out.println("学号已经存在
"
); System.out.println("学号已经存在"); rs.close(); stmt.close(); conn.close(); } else { Object insert=stmt.execute("insert into score values('"+idit+"','"+name+"','"+sex+"','"+gradeit+"')"); rs.close(); stmt.close(); conn.close(); request.getRequestDispatcher("InsertAndSearch").forward(request, response); } } catch (SQLException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }
package TheStudent;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class deleteall
 */
@WebServlet("/deleteall")
public class deleteall extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public deleteall() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
//		response.getWriter().append("Served at: ").append(request.getContextPath());
		request.setCharacterEncoding("utf-8"); //1
		response.setContentType("text/html;charset=utf-8");//2
		response.setCharacterEncoding("utf-8"); //3
		PrintWriter out =response.getWriter();
	//===============================================
		Connection conn=null;
		Statement stmt = null;
		ResultSet rs = null;
		try     
		{	
			Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
			String ur1="jdbc:sqlserver://localhost:1433;databaseName = Student";
			String usename = "sa";
			String password = "123456";
			conn=DriverManager.getConnection(ur1,usename,password);
			stmt = conn.createStatement();
			
		}catch (Exception e) {
			// TODO: handle exception
		}
		
		String name = request.getParameter("name");
		try {
			Object delete=stmt.execute("delete from score");
			System.out.println("已删除"+name);
			out.print("已删除"+name+"
"
); } catch (SQLException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }
package TheStudent;

import java.io.IOException;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

import java.util.ArrayList;

import java.util.List;

 

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;


/**
 * Servlet implementation class Alter
 */
@WebServlet("/Alter")
public class Alter extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public Alter() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		try {
			Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
			String url = "jdbc:sqlserver://localhost:1433;databaseName = Student";
			String username = "sa";
			String password = "123456";
			
			Connection conn = DriverManager.getConnection(url, username, password);
			Statement stmt = conn.createStatement();
			
	//---------------------------------------------------------		
			String id = request.getParameter("id"); 
			int idit = Integer.parseInt(id); 
			String grade = request.getParameter("grade");
			int gradeit = Integer.parseInt(grade);
	//---------------------------------------------------------
			String sql = "update score set 得分="+gradeit+"where 学号="+idit;
			ResultSet rs = stmt.executeQuery(sql);
			
			rs.close();
			stmt.close(); 
			conn.close();
		} catch (SQLException e) {
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		request.getRequestDispatcher("searchall").forward(request, response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}

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