软概（lesson 2）：课堂测试

一、测试题目

二、完成过程

1.设计思想

①连接mysql数据库

②设计user类，增加参数

③设计add类，向数据库内增加内容

④设计addInput页面，完成录入操作

⑤设计add页面，接收录入的参数，并调用add类函数

2.源代码

user.java

package xihuan;public class User {private String kcmc;private String rkjs;private String skdd;public String getKcmc() {return kcmc;}public void setKcmc(String kcmc) {this.kcmc = kcmc;}public String getRkjs() {return rkjs;}public void setRkjs(String rkjs) {this.rkjs = rkjs;}public String getSkdd() {return skdd;}public void setSkdd(String skdd) {this.skdd = skdd;}}

　　add.java

package xihuan;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;public class add{public void add1(User user) {//获得链接对象Connection connection = DBUtil.getConnection();//准备sql语句String sql = "select count(*) from t_user where 'kcmc' = ?";//创建语句传输对象PreparedStatement preparedStatement = null;ResultSet resultSet = null;try {preparedStatement = connection.prepareStatement(sql);preparedStatement.setString(1, user.getKcmc());//接收结果集resultSet = preparedStatement.executeQuery();//遍历结果集sql = "insert into t_user(kcmc,rkjs,skdd) value (?,?,?)";preparedStatement = connection.prepareStatement(sql);preparedStatement.setString(1, user.getKcmc());preparedStatement.setString(2, user.getRkjs());preparedStatement.setString(3, user.getSkdd());preparedStatement.executeUpdate();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}finally {//关闭资源DBUtil.close(resultSet);DBUtil.close(preparedStatement);DBUtil.close(connection);}}
}

　　DBUtil.java

package xihuan;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;public class DBUtil {public  static  Connection getConnection() {try {//1 加载驱动Class.forName("com.mysql.jdbc.Driver").newInstance();} catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}String user = "root";String password = "root";String url = "jdbc:mysql://localhost:3306/web1?useUnicode=true&characterEncoding=utf-8&useSSL=false";Connection connection = null;try {//2 创建链接对象connectionconnection = DriverManager.getConnection(url,user,password);} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}return connection;}//关闭资源的方法public static void close(Connection connection ) {try {if (connection != null) {connection.close();}} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public static void close(PreparedStatement preparedStatement ) {try {if (preparedStatement != null) {preparedStatement.close();}} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public static void close(ResultSet resultSet ) {try {if (resultSet != null) {resultSet.close();}} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}

　　UserException

package xihuan;
public class UserException extends RuntimeException{public UserException() {super();// TODO Auto-generated constructor stub}public UserException(String arg0, Throwable arg1, boolean arg2, boolean arg3) {super(arg0, arg1, arg2, arg3);// TODO Auto-generated constructor stub}public UserException(String arg0, Throwable arg1) {super(arg0, arg1);// TODO Auto-generated constructor stub}public UserException(String arg0) {super(arg0);// TODO Auto-generated constructor stub}public UserException(Throwable arg0) {super(arg0);// TODO Auto-generated constructor stub}}

　　addInput1.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>用户添加页面</title>
</head>
<body><form action="add1.jsp" method="get"><table align="center" border="1"><tr ><td>课程名称：</td><td><input type="text" name="kcmc"/></td></tr><tr><td>任课教师：</td><td><select name="rkjs"><option value="王建民">王建民</option><option value="刘丹">刘丹</option><option value="刘立嘉">刘立嘉</option><option value="王辉">王辉</option><option value="杨子光">杨子光</option>                   </select></td></tr><tr><td>上课地点：</td><td><select name="skdd"><option value="基教">基教</option><option value="一教">一教</option><option value="二教">二教</option><option value="三教">三教</option></td><td><input type="text" name="jt"/></td></tr><tr align="center"><td colspan="2"><input type="submit" value="保存" /></td></tr></table></form>
</body>
</html>

　　add1.jsp

<%@page import="xihuan.*"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<%//接受客户端传递过来的参数String kcmc= request.getParameter("kcmc"); String rkjs= request.getParameter("rkjs");String skdd= request.getParameter("skdd");String jt= request.getParameter("jt");User f=new User();f.setKcmc(kcmc);f.setSkdd(skdd+jt);f.setRkjs(rkjs);add a = new add();a.add1(f);
%><body>保存成功<br>
</body>
</html>

三、结果显示