首页 > 编程语言 >JAVAWEB-项目搭建准备工作八步骤-2023-04-13

JAVAWEB-项目搭建准备工作八步骤-2023-04-13

时间：2023-04-13 20:45:54浏览次数：47  
标签：13 return String 04 void private Integer public JAVAWEB

第一步：生成一个java maven web项目

第二步：配置TOMCAT

第三步：测试项目是否可以跑起来

第四步：导入maven 各个jar包 +增加build 解决资源导出问题

<?xml version="1.0" encoding="UTF-8"?>
<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.feijian</groupId>
    <artifactId>smbms02</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.2</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet.jsp.jstl</groupId>
            <artifactId>jstl-api</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.32</version>
        </dependency>
    </dependencies>

    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
    </build>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

</project>

第五步：创建项目包结构：servlet, pojo, filter, service, dao, util

第六步：编写实体类 pojo ，和数据库CRM映射

package com.feijian.pojo;

import java.math.BigDecimal;
import java.util.Date;

/**
 * 订单
 */
public class Bill {
    private Integer id;   //id
    private String billCode; //账单编码
    private String productName; //商品名称
    private String productDesc; //商品描述
    private String productUnit; //商品单位
    private BigDecimal productCount; //商品数量
    private BigDecimal totalPrice; //总金额
    private Integer isPayment; //是否支付
    private Integer providerId; //供应商ID
    private Integer createdBy; //创建者
    private Date creationDate; //创建时间
    private Integer modifyBy; //更新者
    private Date modifyDate;//更新时间

    private String providerName;//供应商名称

    @Override
    public String toString() {
        return "Bill{" +
                "id=" + id +
                ", billCode='" + billCode + '\'' +
                ", productName='" + productName + '\'' +
                ", productDesc='" + productDesc + '\'' +
                ", productUnit='" + productUnit + '\'' +
                ", productCount=" + productCount +
                ", totalPrice=" + totalPrice +
                ", isPayment=" + isPayment +
                ", providerId=" + providerId +
                ", createdBy=" + createdBy +
                ", creationDate=" + creationDate +
                ", modifyBy=" + modifyBy +
                ", modifyDate=" + modifyDate +
                ", providerName='" + providerName + '\'' +
                '}';
    }

    public String getProviderName() {
        return providerName;
    }

    public void setProviderName(String providerName) {
        this.providerName = providerName;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getBillCode() {
        return billCode;
    }

    public void setBillCode(String billCode) {
        this.billCode = billCode;
    }

    public String getProductName() {
        return productName;
    }

    public void setProductName(String productName) {
        this.productName = productName;
    }

    public String getProductDesc() {
        return productDesc;
    }

    public void setProductDesc(String productDesc) {
        this.productDesc = productDesc;
    }

    public String getProductUnit() {
        return productUnit;
    }

    public void setProductUnit(String productUnit) {
        this.productUnit = productUnit;
    }

    public BigDecimal getProductCount() {
        return productCount;
    }

    public void setProductCount(BigDecimal productCount) {
        this.productCount = productCount;
    }

    public BigDecimal getTotalPrice() {
        return totalPrice;
    }

    public void setTotalPrice(BigDecimal totalPrice) {
        this.totalPrice = totalPrice;
    }

    public Integer getIsPayment() {
        return isPayment;
    }

    public void setIsPayment(Integer isPayment) {
        this.isPayment = isPayment;
    }

    public Integer getProviderId() {
        return providerId;
    }

    public void setProviderId(Integer providerId) {
        this.providerId = providerId;
    }

    public Integer getCreatedBy() {
        return createdBy;
    }

    public void setCreatedBy(Integer createdBy) {
        this.createdBy = createdBy;
    }

    public Date getCreationDate() {
        return creationDate;
    }

    public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }

    public Integer getModifyBy() {
        return modifyBy;
    }

    public void setModifyBy(Integer modifyBy) {
        this.modifyBy = modifyBy;
    }

    public Date getModifyDate() {
        return modifyDate;
    }

    public void setModifyDate(Date modifyDate) {
        this.modifyDate = modifyDate;
    }


}
package com.feijian.pojo;

import java.util.Date;

public class Provider {

    private Integer id;   //id
    private String proCode; //供应商编码
    private String proName; //供应商名称
    private String proDesc; //供应商描述
    private String proContact; //供应商联系人
    private String proPhone; //供应商电话
    private String proAddress; //供应商地址
    private String proFax; //供应商传真
    private Integer createdBy; //创建者
    private Date creationDate; //创建时间
    private Integer modifyBy; //更新者
    private Date modifyDate;//更新时间

    @Override
    public String toString() {
        return "Provider{" +
                "id=" + id +
                ", proCode='" + proCode + '\'' +
                ", proName='" + proName + '\'' +
                ", proDesc='" + proDesc + '\'' +
                ", proContact='" + proContact + '\'' +
                ", proPhone='" + proPhone + '\'' +
                ", proAddress='" + proAddress + '\'' +
                ", proFax='" + proFax + '\'' +
                ", createdBy=" + createdBy +
                ", creationDate=" + creationDate +
                ", modifyBy=" + modifyBy +
                ", modifyDate=" + modifyDate +
                '}';
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getProCode() {
        return proCode;
    }

    public void setProCode(String proCode) {
        this.proCode = proCode;
    }

    public String getProName() {
        return proName;
    }

    public void setProName(String proName) {
        this.proName = proName;
    }

    public String getProDesc() {
        return proDesc;
    }

    public void setProDesc(String proDesc) {
        this.proDesc = proDesc;
    }

    public String getProContact() {
        return proContact;
    }

    public void setProContact(String proContact) {
        this.proContact = proContact;
    }

    public String getProPhone() {
        return proPhone;
    }

    public void setProPhone(String proPhone) {
        this.proPhone = proPhone;
    }

    public String getProAddress() {
        return proAddress;
    }

    public void setProAddress(String proAddress) {
        this.proAddress = proAddress;
    }

    public String getProFax() {
        return proFax;
    }

    public void setProFax(String proFax) {
        this.proFax = proFax;
    }

    public Integer getCreatedBy() {
        return createdBy;
    }

    public void setCreatedBy(Integer createdBy) {
        this.createdBy = createdBy;
    }

    public Date getCreationDate() {
        return creationDate;
    }

    public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }

    public Integer getModifyBy() {
        return modifyBy;
    }

    public void setModifyBy(Integer modifyBy) {
        this.modifyBy = modifyBy;
    }

    public Date getModifyDate() {
        return modifyDate;
    }

    public void setModifyDate(Date modifyDate) {
        this.modifyDate = modifyDate;
    }


}
package com.feijian.pojo;

import java.util.Date;

public class Role {

    private Integer id;   //id
    private String roleCode; //角色编码
    private String roleName; //角色名称
    private Integer createdBy; //创建者
    private Date creationDate; //创建时间
    private Integer modifyBy; //更新者
    private Date modifyDate;//更新时间

    @Override
    public String toString() {
        return "Role{" +
                "id=" + id +
                ", roleCode='" + roleCode + '\'' +
                ", roleName='" + roleName + '\'' +
                ", createdBy=" + createdBy +
                ", creationDate=" + creationDate +
                ", modifyBy=" + modifyBy +
                ", modifyDate=" + modifyDate +
                '}';
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getRoleCode() {
        return roleCode;
    }

    public void setRoleCode(String roleCode) {
        this.roleCode = roleCode;
    }

    public String getRoleName() {
        return roleName;
    }

    public void setRoleName(String roleName) {
        this.roleName = roleName;
    }

    public Integer getCreatedBy() {
        return createdBy;
    }

    public void setCreatedBy(Integer createdBy) {
        this.createdBy = createdBy;
    }

    public Date getCreationDate() {
        return creationDate;
    }

    public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }

    public Integer getModifyBy() {
        return modifyBy;
    }

    public void setModifyBy(Integer modifyBy) {
        this.modifyBy = modifyBy;
    }

    public Date getModifyDate() {
        return modifyDate;
    }

    public void setModifyDate(Date modifyDate) {
        this.modifyDate = modifyDate;
    }

}

 

package com.feijian.pojo;

import java.util.Date;

public class User {
    private Integer id; //id
    private String userCode; //用户编码
    private String userName; //用户名称
    private String userPassword; //用户密码
    private Integer gender;  //性别
    private Date birthday;  //出生日期
    private String phone;   //电话
    private String address; //地址
    private Integer userRole;    //用户角色
    private Integer createdBy;   //创建者
    private Date creationDate; //创建时间
    private Integer modifyBy;     //更新者
    private Date modifyDate;   //更新时间

    private Integer age;//年龄

    private String userRoleName;    //用户角色名称


    public String getUserRoleName() {
        return userRoleName;
    }

    public void setUserRoleName(String userRoleName) {
        this.userRoleName = userRoleName;
    }

    public Integer getAge() {
      /*long time = System.currentTimeMillis()-birthday.getTime();
      Integer age = Long.valueOf(time/365/24/60/60/1000).IntegerValue();*/
        Date date = new Date();
        Integer age = date.getYear() - birthday.getYear();
        return age;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", userCode='" + userCode + '\'' +
                ", userName='" + userName + '\'' +
                ", userPassword='" + userPassword + '\'' +
                ", gender=" + gender +
                ", birthday=" + birthday +
                ", phone='" + phone + '\'' +
                ", address='" + address + '\'' +
                ", userRole=" + userRole +
                ", createdBy=" + createdBy +
                ", creationDate=" + creationDate +
                ", modifyBy=" + modifyBy +
                ", modifyDate=" + modifyDate +
                ", age=" + age +
                ", userRoleName='" + userRoleName + '\'' +
                '}';
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getUserCode() {
        return userCode;
    }

    public void setUserCode(String userCode) {
        this.userCode = userCode;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getUserPassword() {
        return userPassword;
    }

    public void setUserPassword(String userPassword) {
        this.userPassword = userPassword;
    }

    public Integer getGender() {
        return gender;
    }

    public void setGender(Integer gender) {
        this.gender = gender;
    }

    public Date getBirthday() {
        return birthday;
    }

    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public Integer getUserRole() {
        return userRole;
    }

    public void setUserRole(Integer userRole) {
        this.userRole = userRole;
    }

    public Integer getCreatedBy() {
        return createdBy;
    }

    public void setCreatedBy(Integer createdBy) {
        this.createdBy = createdBy;
    }

    public Date getCreationDate() {
        return creationDate;
    }

    public void setCreationDate(Date creationDate) {
        this.creationDate = creationDate;
    }

    public Integer getModifyBy() {
        return modifyBy;
    }

    public void setModifyBy(Integer modifyBy) {
        this.modifyBy = modifyBy;
    }

    public Date getModifyDate() {
        return modifyDate;
    }

    public void setModifyDate(Date modifyDate) {
        this.modifyDate = modifyDate;
    }
}

第七步：编写基础公共类 BaseDao (包含resources 下：db.properties ，以及编写字符过滤器类及在WEB.xml中注册)

driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/smbms?useUnicode=true&characterEncoding=utf-8
username=root
password=123456
package com.feijian.dao;

import java.io.IOException;
import java.io.InputStream;
import java.sql.*;
import java.util.Properties;

public class BaseDao {
    private static String driver;
    private static String url;
    private static String username;
    private static String password;
    //静态代码块，类加载时就初始化
    static {
        //通过类加载器读取对应资源
        InputStream is = BaseDao.class.getClassLoader().getResourceAsStream("db.propertites");
        Properties properties = new Properties();
        try {
            properties.load(is);
        } catch (IOException e) {
            e.printStackTrace();
        }
        driver=properties.getProperty("driver");
        url=properties.getProperty("url");
        username=properties.getProperty("username");
        password=properties.getProperty("password");
    }

    //获取数据库的链接
    public static Connection getConnection(){
        Connection connection =null;
        try {
            Class.forName(driver);
            connection = DriverManager.getConnection(url, username, password);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return connection;
    }

    //查询公共类
    public static ResultSet execute(Connection connection,String sql,Object[] params,ResultSet resultSet,PreparedStatement preparedStatement) throws SQLException {
        //预编译的SQL,在后面直接执行即可
        preparedStatement = connection.prepareStatement(sql);
        for (int i = 0; i < params.length; i++) {
            //占位符从1开始，但数组是从0开始
            preparedStatement.setObject(i+1,params[i]);
        }
        resultSet = preparedStatement.executeQuery();
        return resultSet;
    }

    //编写增删改公共类
    public static int execute(Connection connection,String sql,Object[] params,PreparedStatement preparedStatement) throws SQLException {
        preparedStatement = connection.prepareStatement(sql);
        for (int i = 0; i < params.length; i++) {
            //占位符从1开始，但数组是从0开始
            preparedStatement.setObject(i+1,params[i]);
        }
        int updateRows = preparedStatement.executeUpdate();
        return updateRows;
    }

    //释放资源
    public static boolean closeResource(Connection connection,PreparedStatement preparedStatement,ResultSet resultSet){

        boolean flag =true;
        if (resultSet!=null){
            try {
                resultSet.close();
                //GC回收
                resultSet=null;
            } catch (SQLException e) {
                e.printStackTrace();
                flag=false;
            }
        }

        if (preparedStatement!=null){
            try {
                preparedStatement.close();
                //GC回收
                preparedStatement=null;
            } catch (SQLException e) {
                e.printStackTrace();
                flag=false;
            }
        }

        if (connection!=null){
            try {
                connection.close();
                //GC回收
                connection=null;
            } catch (SQLException e) {
                e.printStackTrace();
                flag=false;
            }
        }
     return flag;

    }

}
package com.feijian.filter;

import javax.servlet.*;
import java.io.IOException;

public class CharacterEncodingFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
       request.setCharacterEncoding("utf-8");
       response.setCharacterEncoding("utf-8");
       chain.doFilter(request,response);
    }

    @Override
    public void destroy() {

    }
}

第八步：导入静态资源 web下 calendar , css , images, js

准备工作准备到位。

 

标签：13,return,String,04,void,private,Integer,public,JAVAWEB
From： https://www.cnblogs.com/RUI2022/p/17316339.html

相关文章

  • 2023/4/13
    1、输入一个整数，将其顺序反转后输出   (dowhile语句)#include<iostream>usingnamespacestd;intmain(){ intn,s; cin>>n; do{ s=n%10;          //取末尾数字 cout<<s; n=n/10;          //将原数的末尾数字割除 }while(n!=0......
  • 2023-4-13美团测开二面
    1.自我介绍2.写项目的背景是什么3.为什么使用SpringCloud，主要适用于哪些功能4.为什么用MongoDB5.MongoDB和Redis哪个更快6.拷贝数组有几种方式，哪种方式效率更高效率从高到低：System.arraycopy、clone、(Arrays.copyOf、Arrays.copyOfRange）、for循环。7.Integ......
  • 2023/04/12刷题
    C.MakeItGood链接C.MakeItGood这个题是说去掉前缀,我们可以发现如果一个数列可以分为一个连续的上升区域和一个连续的下降区域的话,该数列是好的,该题的思路就是从后向前找到符合该特征的最长的序列#include<iostream>#include<algorithm>#include<cstdio>#includ......
  • 随笔20230413
    突然很想找个根本不讲中文的国家生活个一年两年。远离世俗、所有人，只和自己的灵魂独处一会，仔细地问问自己，你、我究竟从何而来，又终将魂归何处。我有深厚的基础生物知识，我系统学习过大量的理工科知识，我理解万事万物都有其运行的规律我明白一切缘起都终将湮灭可是我还是固执的认......
  • 4.13
    Android中wrap_parent、match_parent、fill_parent是什么意思，有什么区别？1、wrap是扩展空间，并且强制性占用整个空间，不给其他控件留地方。2、match的话是指“填充满”父容器，有自动调整的功能。区别：1、wrap_content设置一个视图的尺寸为wrap_content将强制性地使视图扩展以显示全......
  • 13文件操作
    文件操作文件读写语法：open(file,mode,encoding)参数：file——文件所在位置（相对路径、绝对路径）mode——操作文件的模式encoding——文件的编码格式相对路径：基于目前的路径获取绝对路径：一个完整的路径操作文件的模式：r-读w-写a-追加模式描述r以只读......
  • 打卡4.13
    #include<iostream>usingnamespacestd;classTime{public:      Time();      friendvoiddisplay();private:      inthour,minu,sec;};Time::Time(){     hour=11;      minu=11;      sec=11;}voiddisplay(){Tim......
  • ubuntu 16.04.7初始化脚本
    #!/bin/bash#在root用户下运行cp/etc/apt/sources.list/etc/apt/sources.list.baksed-i"s@http://.*archive.ubuntu.com@http://mirrors.tuna.tsinghua.edu.cn@g"/etc/apt/sources.listsed-i"s@http://.*security.ubuntu.com@http://mirrors.tuna.tsingh......
  • HDU 5045 Contest(费用流)
    题目地址：HDU5045终于在比赛中用网络流A了一道题。。。刷了那么多网络流，终于用到一次了。。虽然题目很简单，但是还是要纪念一下下。。。我这题的思路就是求m/n次费用流，每n个算作同一轮，对这同一轮的求最大费用流。建图就很简单了，最简单的二分图模型。代码如下：#include<iostre......
  • HDU 2604 Queuing（矩阵快速幂）
    题目地址：HDU2604这题只要推出公式来，构造矩阵就很容易了，问题是推不出公式来。。TAT。。从递推的思路考虑，用f(n)表示n个人满足条件的结果，如果最后一个是m则前n-1人可以任意排列，有f(n-1)种；如果是f，则考虑后两位mf和ff，没有一定满足或者一定不满足的状态，所以继续考虑一位，考虑后三位......

赞助商

阅读排行

网站主页关于我们联系我们网站地图

本网站内容转载自其他媒体，侵权联系[admin##ips99.com]。

Copyright © 2020-2023 IPS99 版权所有 IPS99