Web开发基础_Servlet学习_0018_项目练习（一）

编程语言 2018-09-09 17:21:17 阅读次数: 0
版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/Coder_Boy_/article/details/82533643

项目名称：中国电信运营支持系统-网络版（一）

开发规范说明：

1. NETCTOSS
 NET    网络
 C        China
 T        Telecom        电信
 O        Operation    运营
 S        Support        支持
 S        System        系统
 中国电信运营支持系统-网络版
 
2.开发步骤
1)创建项目
2)导包
 - javaee    tomcat
 - jstl        jstl
 - jdbc        ojdbc
 - dbcp        commons-dbcp

3.Servlet路径规范
 1)查询资费: /findCost.do
 
4.JSP命名规范
 1)查询资费: /WEB-INF/cost/find.jsp

 案例所需素材下载

资费管理部 开发图示

案例演示：

工程案例目录结构

pom.xml：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.study</groupId>
  <artifactId>netctoss</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  
  <dependencies>
  	<dependency>
  		<groupId>javaee</groupId>
  		<artifactId>javaee-api</artifactId>
  		<version>5</version>
  	</dependency>
  	<dependency>
  		<groupId>jstl</groupId>
  		<artifactId>jstl</artifactId>
  		<version>1.2</version>
  	</dependency>
  	<dependency>
  		<groupId>com.oracle</groupId>
  		<artifactId>ojdbc14</artifactId>
  		<version>10.2.0.4.0</version>
  	</dependency>
  	<dependency>
  		<groupId>commons-dbcp</groupId>
  		<artifactId>commons-dbcp</artifactId>
  		<version>1.4</version>
  	</dependency>
  </dependencies>
  
  
</project>

web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
  <display-name>netctoss</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
  <servlet>
  	<servlet-name>main</servlet-name>
  	<servlet-class>web.MainServlet</servlet-class>
  </servlet>
  <servlet-mapping>
  	<servlet-name>main</servlet-name>
  	<url-pattern>*.do</url-pattern>
  </servlet-mapping>
</web-app>

MainServlet.java

package web;

import java.io.IOException;
import java.util.List;

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

import dao.CostDao;
import entity.Cost;

public class MainServlet extends HttpServlet{

	@Override
	protected void service(HttpServletRequest req,
			HttpServletResponse res) throws ServletException, IOException {
			String path = req.getServletPath();
			if("/findCost.do".equals(path)){
				//查询资费
				System.out.println(path);
				findCost(req,res);
			}else{
				//错误的路径
				throw new RuntimeException("没有这个页面");
			}
	}

	protected void findCost(HttpServletRequest req, 
			HttpServletResponse res) throws ServletException, IOException {
			//查询资费
			CostDao dao = new CostDao();
			List<Cost> list = dao.findAll();
			//转发到查询页面
			req.setAttribute("costs", list);
			//当前：/netctoss/findCost.dao
			//目标：/netctoss/WEB-INF/cost/find.jsp
			System.out.println("into--findCost");
			req.getRequestDispatcher("WEB-INF/cost/find.jsp").forward(req, res);
			
	}

	
}

CostDao.java

package dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import entity.Cost;
import util.DBUtil;

public class CostDao {

	public List<Cost> findAll(){
		Connection conn = null;
		
		try {
			conn = DBUtil.getConnection();
			String sql = "select * from cost "
						+"order by cost_id";
			PreparedStatement ps = conn.prepareStatement(sql);
			ResultSet rs= ps.executeQuery();
			List<Cost> list = new ArrayList<Cost>();
			while(rs.next()){
				Cost c = new Cost();
				c.setCostId(rs.getInt("cost_id"));
				c.setName(rs.getString("name"));
				c.setBaseDuration(rs.getInt("base_duration"));
				c.setBaseCost(rs.getDouble("base_cost"));
				c.setUnitCost(rs.getDouble("unit_cost"));
				c.setStatus(rs.getString("status"));
				c.setDescr(rs.getString("descr"));
				c.setCreatime(rs.getTimestamp("creatime"));
				c.setStartime(rs.getTimestamp("startime"));
				c.setCostType(rs.getString("cost_type"));
				list.add(c);
			}
			
			return list;
		} catch (SQLException e) {
			e.printStackTrace();
			throw new RuntimeException("查询资费失败",e);
		}finally{
			DBUtil.close(conn);
		}
	}
	
	public static void main(String[] args) {
		CostDao dao = new CostDao();
		List<Cost> list = dao.findAll();
		for(Cost c: list){
			System.out.println(c.getCostId()+","+c.getName());
		}
	}
}

Cost.java

package entity;

import java.io.Serializable;
import java.sql.Timestamp;

public class Cost implements Serializable {
	
	private Integer costId;
	private String name;
	//基本时长
	private Integer baseDuration;
	//基本费用
	private Double baseCost;
	//单位费用
	private Double unitCost;
	//状态：0-启用；1-禁用
	private String status;
	//描述
	private String descr;
	//创建时间
	private Timestamp creatime;
	//开通时间
	private Timestamp startime;
	//资费类型：1-包月；2-套餐；3-计时
	private String costType;
	
	public Integer getCostId() {
		return costId;
	}
	public void setCostId(Integer costId) {
		this.costId = costId;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Integer getBaseDuration() {
		return baseDuration;
	}
	public void setBaseDuration(Integer baseDuration) {
		this.baseDuration = baseDuration;
	}
	public Double getBaseCost() {
		return baseCost;
	}
	public void setBaseCost(Double baseCost) {
		this.baseCost = baseCost;
	}
	public Double getUnitCost() {
		return unitCost;
	}
	public void setUnitCost(Double unitCost) {
		this.unitCost = unitCost;
	}
	public String getStatus() {
		return status;
	}
	public void setStatus(String status) {
		this.status = status;
	}
	public String getDescr() {
		return descr;
	}
	public void setDescr(String descr) {
		this.descr = descr;
	}
	public Timestamp getCreatime() {
		return creatime;
	}
	public void setCreatime(Timestamp creatime) {
		this.creatime = creatime;
	}
	public Timestamp getStartime() {
		return startime;
	}
	public void setStartime(Timestamp startime) {
		this.startime = startime;
	}
	public String getCostType() {
		return costType;
	}
	public void setCostType(String costType) {
		this.costType = costType;
	}

}

DBUtil.java

package util;

import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

import org.apache.commons.dbcp.BasicDataSource;

/**
 * 该类用来管理连接
 * 数据库连接信息，保存在属性文件中
 * 使用连接池获取连接
 * @author Cher_du
 *
 */
public class DBUtil {
	
	private static BasicDataSource ds;
	
	static{
		//加载属性文件数据
		Properties prop = new Properties();
		try {
			prop.load(DBUtil.class.getClassLoader().getResourceAsStream("db.properties"));
			String driverclass = prop.getProperty("jdbc.driverclass");
			String url=prop.getProperty("jdbc.url");
			String user = prop.getProperty("jdbc.user");
			String password = prop.getProperty("jdbc.password");
			String strMaxActive =prop.getProperty("dbcp.maxActive");
			String strInitSize =prop.getProperty("dbcp.initSize");
			//实例化，并初始化连接池
			ds = new BasicDataSource();
			ds.setDriverClassName(driverclass);
			ds.setUrl(url);
			ds.setUsername(user);
			ds.setPassword(password);
			ds.setMaxActive(Integer.parseInt(strMaxActive));
			ds.setInitialSize(Integer.parseInt(strInitSize));
			
		} catch (IOException e) {
			e.printStackTrace();
			throw new RuntimeException("读取属性文件错误",e);
		}
	}

	//2、创建连接
	public static Connection getConnection() throws SQLException{
		return ds.getConnection();
	}
	
	//3、归还连接
	public static void close(Connection conn){
		if(conn!=null){
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
				throw new RuntimeException("归还连接错误",e);
			}
		}
	}
	
	//测试
	public static void main(String[] args) throws SQLException {
		Connection conn = getConnection();
		System.out.println(conn.getClass().getName());
		close(conn);
	}
}

db.properties

jdbc.driverclass=oracle.jdbc.driver.OracleDriver
jdbc.url=jdbc:oracle:thin:@localhost:1521:orcl
jdbc.user=learn
jdbc.password=learn
dbcp.maxActive=1
dbcp.initSize=1

后台数据库sql脚本：

--资费信息表
create table cost(
    cost_id     number(4) primary key,
    name      varchar(50)  not null,
    base_duration   number(11),
    base_cost     number(7,2),
    unit_cost     number(7,4),
    status      char(1),
    descr       varchar2(100),
    creatime    date default sysdate ,
    startime    date,
  cost_type   char(1)
  );

create sequence cost_seq start with 100;

INSERT INTO COST VALUES (1,'5.9元套餐',20,5.9,0.4,0,'5.9元20小时/月,超出部分0.4元/时',DEFAULT,DEFAULT,'2');
INSERT INTO COST VALUES (2,'6.9元套餐',40,6.9,0.3,0,'6.9元40小时/月,超出部分0.3元/时',DEFAULT,DEFAULT,'2');
INSERT INTO COST VALUES (3,'8.5元套餐',100,8.5,0.2,0,'8.5元100小时/月,超出部分0.2元/时',DEFAULT,DEFAULT,'2');
INSERT INTO COST VALUES (4,'10.5元套餐',200,10.5,0.1,0,'10.5元200小时/月,超出部分0.1元/时',DEFAULT,DEFAULT,'2');
INSERT INTO COST VALUES (5,'计时收费',null,null,0.5,0,'0.5元/时,不使用不收费',DEFAULT,DEFAULT,'3');
INSERT INTO COST VALUES (6,'包月',null,20,null,0,'每月20元,不限制使用时间',DEFAULT,DEFAULT,'1');
COMMIT;

将netctoss工程部署到Tomcat上，运行Tomcat启动案例工程，

浏览器录入http://localhost:8080/netctoss/findCost.do 即可：如果没有错误，最终页面显示效果应如下图：

点击启用与删除按钮：

猜你喜欢

转载自blog.csdn.net/Coder_Boy_/article/details/82533643
今日推荐
《美国对全球网络空间安全与发展的威胁和破坏》报告发布
火速冲上 GitHub 热榜 —— 开源编程语言、框架哪有这么可爱？
北京人形机器人创新中心发布全球首个纯电驱拟人奔跑的全尺寸人形机器人“天工”
LFOSSA 源来如此公开课 | 掌握云原生未来：CNCF 认证全面攻略与备考秘籍
周排行
让自己的头脑极度开放
CentOS 6.5(x64) 和Redhat6.5操作系误删libc
高可用注册中心
【日记】12.28/【题解】AtCoder AGC041
XML（5）_XML 约束_DTD
Java集合Map（四）
树梅派安装桌面环境教程
pipenv 的 使用和安装
小程序白屏问题和内存研究
C语言简单选择排序
每日归档
更多
2024-05-02(0)
2024-05-01(4)
2024-04-30(1)
2024-04-29(40)
2024-04-28(0)
2024-04-27(56)
2024-04-26(39)
2024-04-25(22)
2024-04-24(36)
2024-04-23(26)

代码天地 © 2018 codetd.com

境外服务器   最新电视剧2022