JavaWeb實現學生資訊管理系統(1)
阿新 • • 發佈:2021-08-17
這是一個很簡單的學生資訊管理系統,會用到很多小知識,比如說:
- 連線池
- DBUtils
- P、EL、JSTL
- MVC設計模式
Web之簡單的學生資訊管理系統(一)
JavaWeb之簡單的學生資訊管理系統(二)
JavaWeb之簡單的學生資訊管理系統(三)
一、需求分析
實現一個簡單的學生資訊管理系統,具體實現功能有如下:
1.查詢學生的息並列表展示
2.新增學生資訊
3.刪除學生資訊
4.更新(修改)學生信息
5.模糊查詢
二、準備工作
1. 建立資料庫stus以及建立資料庫表stu
CREATE DATABASE stus; USE stus; CREATE TABLE stu ( sid INT PRIMARY KEY AUTO_INCREMENT,sname VARCHAR (20),gender VARCHAR (5),phone VARCHAR (20),birthday DATE,hobby VARCHAR(50),info VARCHAR(200) );
2. 專案框架
3. 匯入專案需要的jar包
4. C3P0的配置檔案c3p0-config.xml
<c3p0-config> <default-config> <property name="driverClass">com..cj.jdbc.Driver</property> <property name="jdbcUrl">jdbc:mysql://localhost/stus?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT</property> <property name="user">root</property> <property name="password">root</property> <property name="initialPoolSize">10</property> <property name="maxIdleTime">30</property> <property name="maxPoolSize">100</property> <property name="minPoolSize">10</property> <property name="maxStatements">200</property> </default-config> </c3p0-config>
三、程式碼準備
1. 實現Student類
【備:com.domain包下的Student.java】
package com.domain; import java.util.D客棧ate; /** * 這是封裝的學生物件Bean * @author Administrator * */ public class Student { private int sid; private String sname; private http://www.cppcns.comString gender; private String phone; private String hobby; private String info; private Date birthday; public Student() { super(); } public Student(String sname,String gender,String phone,String hobby,String info,Date birthday) { super(); this.sname = sname; this.gender = gender; this.phone = phone; this.hobby = hobby; this.info = info; this.birthday = birthday; } public int getSid() { return sid; } public void setSid(int sid) { this.sid = sid; } public String getSname() { return sname; } public void setSname(String sname) { this.sname = sname; } public String getGender() { return gender; } public void setGender(String gender) { this.gender = gender; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } public Date getBirthday() { return birthday; } public void setBirthday(Date birthday) { this.birthday = birthday; } public String getHobby() { return hobby; } public void setHobby(String hobby) { this.hobby = hobby; } public String getInfo() { return info; } public void setInfo(String info) { this.info = info; } }
2. 寫一個類,判斷字串是否相等【TestUtils.java】
package com.util; public class TestUtils { /** * 判斷某一個字串是否為空 * @param s * @return */ public static boolean isEmpty(String s) { return s == null || s.length() == 0; } }
3. JDBCUtils02.java
package com.util; import java.sql.Connection; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import javax.sql.DataSource; import com.mchange.v2.c3p0.ComboPooledDataSource; public class JDBCUtil02 { static ComboPooledDataSource dataSource = null; static{ dataSource = new ComboPooledDataSource(); } public static DataSource getDataSource() { return dataSource; } /** * 獲得連線物件 * @return * @throws SQLException */ public static Connection getConn() throws SQLException{ return dataSource.getConnection(); } /** * 釋放資源 * @param conn * @param st * @param rs */ public static void release(Connection conn,Statement st,ResultSet rs){ closeRs(rs); closeSt(st); closeConn(conn); } public static void release(Connection conn,Statement st){ closeSt(st); closeConn(conn); } private static void closeRs(ResultSet rs){ try { if(rs != null){ rs.close(); } } catch (SQLException e) { e.printStackTrace(); }finally{ rs = null; } } private static void closeSt(Statement st){ try { if(st != null){ st.close(); } } catch (SQLException e) { e.printStackTrace(); }finally{ st = null; } } private static void closeConn(Connection conn){ try { if(conn != null){ conn.close(); } } catch (SQLException e) { e.printStackThttp://www.cppcns.comrace(); }finally{ conn = null; } } }
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支援我們。