{"id":15069615,"url":"https://github.com/jingyibysutsoftware/j2ee_bankmanager","last_synced_at":"2025-04-10T16:52:42.975Z","repository":{"id":154111806,"uuid":"384131807","full_name":"JingyibySUTsoftware/J2EE_BankManager","owner":"JingyibySUTsoftware","description":"J2EE简易银行管理系统","archived":false,"fork":false,"pushed_at":"2021-07-08T13:51:44.000Z","size":4926,"stargazers_count":4,"open_issues_count":1,"forks_count":1,"subscribers_count":1,"default_branch":"master","last_synced_at":"2025-03-24T14:44:47.400Z","etag":null,"topics":["dhcp","filter","j2ee","javase","layui","mysql","servlet","tomcat"],"latest_commit_sha":null,"homepage":"","language":null,"has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/JingyibySUTsoftware.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2021-07-08T13:22:05.000Z","updated_at":"2024-07-30T05:25:04.000Z","dependencies_parsed_at":null,"dependency_job_id":"ed53c575-7c91-4a4b-b617-9d18b9a17b6c","html_url":"https://github.com/JingyibySUTsoftware/J2EE_BankManager","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/JingyibySUTsoftware%2FJ2EE_BankManager","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/JingyibySUTsoftware%2FJ2EE_BankManager/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/JingyibySUTsoftware%2FJ2EE_BankManager/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/JingyibySUTsoftware%2FJ2EE_BankManager/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/JingyibySUTsoftware","download_url":"https://codeload.github.com/JingyibySUTsoftware/J2EE_BankManager/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":248256386,"owners_count":21073517,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["dhcp","filter","j2ee","javase","layui","mysql","servlet","tomcat"],"created_at":"2024-09-25T01:43:31.440Z","updated_at":"2025-04-10T16:52:42.944Z","avatar_url":"https://github.com/JingyibySUTsoftware.png","language":null,"funding_links":[],"categories":[],"sub_categories":[],"readme":"## BankManager\n### JavaWeb快速入门的J2EE项目\n### 项目简介\n#### 技术栈  Servlet + Jsp + Tomcat比较适合新手入门练手\n\u003e项目用到的技术如下：\n\u003eJava：`Java SE基础` \n\u003e前端： `HTML` , `CSS` , `JavaScript` , `jQuery` `LayUI（前端模板框架）`\n\u003eJ2EE： `Tomcat` , `Servlet` , `JSP` , `Filter`\n\u003e数据库： `MySQL`\n\n----\n#### 业务需求\n后台管理页\n1.管理员登录\n\t1.1 新增用户信息\n\t1.2 新增银行卡信息\n\t1.3 修改银行卡信息\n  \t1.4 删除银行卡\n \t1.5 查看所有银行卡信息\n \t1.6 根据条件查看银行卡信息\n前台用户页\n 2.用户登录\n \t 2.1 取钱功能\n\t 2.2 存钱功能\n\t 2.3 转账功能\n\t 2.4 查看自己银行卡信息\n\t 2.5 修改密码功能\n\n----\n#### 表结构\n| 表名        | 中文含义   | 介绍                                             |\n| ----------- | ---------- | ------------------------------------------------ |\n| bankcard    | 银行卡表   | 存放银行卡信息如卡号，密码，余额，卡类型，用户号 |\n| bankmanager | 管理员表   | 存放管理员信息如管理员号，管理员姓名，管理员密码 |\n| bankuser    | 用户信息表 | 存放用户信息如用户id，用户名，手机，公司，籍贯   |\n\n----\n本文主要以用户表为例查询用户信息为示例功能演示\nJ2EE的核心思想\n#### 实体类（bean包下）\n实体类就是基于ORM（Object Relational Mapping）思想，将Java的类与数据库的表进行映射\nBankUser.java映射bankuser表\n\n```java\n/**   \n * @ClassName:  BankUser   \n * @Description:用户实体类\n * @author: jingyi\n * @date:   2021年5月10日 下午4:18:14      \n * @Copyright:  \n */\npublic class BankUser {\n\tprivate int uid;//用户id\n\tprivate String uname;//用户名\n\tprivate int uphone;//电话\n\tprivate String company;//公司\n\tprivate String hometown;//籍贯\n\tpublic String getHometown() {\n\t\treturn hometown;\n\t}\n\tpublic void setHometown(String hometown) {\n\t\tthis.hometown = hometown;\n\t}\n\tpublic int getUid() {\n\t\treturn uid;\n\t}\n\tpublic void setUid(int uid) {\n\t\tthis.uid = uid;\n\t}\n\tpublic String getUname() {\n\t\treturn uname;\n\t}\n\tpublic void setUname(String uname) {\n\t\tthis.uname = uname;\n\t}\n\tpublic int getUphone() {\n\t\treturn uphone;\n\t}\n\tpublic void setUphone(int uphone) {\n\t\tthis.uphone = uphone;\n\t}\n\tpublic String getCompany() {\n\t\treturn company;\n\t}\n\tpublic void setCompany(String company) {\n\t\tthis.company = company;\n\t}\n\t\n\t\n}\n```\n数据库bankuser表\n![在这里插入图片描述](https://img-blog.csdnimg.cn/20210708201618333.png)\n\n----\n#### Dao层（dao包下）\n用于进行数据库访问的操作\n那么在访问数据库之前我们需要借助数据库连接池\n\n使用数据库连接工具类帮助我们获取数据库连接对象，关闭数据库连接对象  \nconnUtil.java\n\n```java\npublic class connUtil {\n\tprivate static ThreadLocal\u003cConnection\u003e threadload=new ThreadLocal\u003c\u003e();\n\tprivate static DataSource ds;\n\tstatic {//数据源对象加载\n\t\ttry {\n\t\t\tProperties properties = new Properties();\n\t\t\tInputStream ins=connUtil.class.getResourceAsStream(\"/mysql.properties\");\n\t\t\tproperties.load(ins);\n\t\t\tds=BasicDataSourceFactory.createDataSource(properties);\n\t\t} catch (Exception e) {\n\t\t\t// TODO Auto-generated catch block\n\t\t\te.printStackTrace();\n\t\t}\n\t\t\n\t}\n\t//获取数据库连接对象\n\tpublic static Connection getConn() throws SQLException{\n\t\tConnection conn=threadload.get();\n\t\tif(conn==null||conn.isClosed()) {\n\t\t\tconn=ds.getConnection();\n\t\t\tthreadload.set(conn);\n\t\t}\n\t\treturn conn;\n\t}\n\t\n\t//关闭数据库连接对象\n\tpublic static void closeConn() {\n\t\tConnection conn=threadload.get();\n\t\ttry {\n\t\t\tif(conn!=null\u0026\u0026!conn.isClosed()) {\n\t\t\t\tconn.close();\n\t\t\t}\n\t\t} catch (SQLException e) {\n\t\t\te.printStackTrace();\n\t\t}finally{\n\t\t\tthreadload.set(conn);\n\t\t}\n\t}\n}\n```\n\n这里还需要一个资源文件用来告知工具类我们需要连接哪个数据库\nmysql.proprerties\n\n```xml\ndriverClassName=com.mysql.cj.jdbc.Driver\nurl=jdbc:mysql://localhost:3306/class04?characterEncoding=utf8\u0026serverTimezone=Asia/Shanghai\nusername=root\npassword=root\nmaxActive=30\nmaxIdle=10\nmaxWait=60000\n```\n创建BankDao接口，这里不使用一个类直接操作数据库，而是使用接口声明方法，再用这个接口的实现类去操作数据库，这样可以降低层与层之间的耦合度\nBankDao.java\n\n```java\npublic interface BankDao {\n\tpublic List\u003cBankUser\u003e FindAllUser() throws SQLException;\n}\n```\nBankDaoImpl.java（dao.Impl包下）\n对于不同的功能对应不同的方法与数据库进行数据操作\n```java\npublic class BankDaoImpl implements BankDao {\n\n\t@Override\n\tpublic List\u003cBankUser\u003e FindAllUser() throws SQLException {\t\n\t\tConnection conn = connUtil.getConn();\n\t\tString sql=\"select * from  bankuser\";\n\t\tStatement statement = conn.createStatement();\n\t\tResultSet rs = statement.executeQuery(sql);\n\t\tList\u003cBankUser\u003e list =new ArrayList\u003cBankUser\u003e();\n\t\twhile(rs.next()) {\n\t\t\tBankUser user = new BankUser();\n\t\t\tuser.setUid(rs.getInt(1));\n\t\t\tuser.setUname(rs.getString(2));\n\t\t\tuser.setUphone(rs.getInt(3));\n\t\t\tuser.setCompany(rs.getString(4));\n\t\t\tuser.setHometown(rs.getString(5));\n\t\t\tlist.add(user);\n\t\t}\n\t\treturn list;\n\t}\n}\n```\n----\n#### Service层（service包下）\n与controller层直接通信，进一步降低层之间的耦合性\nBankService.java\n```java\npublic interface BankService {\n\tpublic List\u003cBankUser\u003e FindAllUser();\n}\t\n```\n\n数据结果的判断，事物的提交、回滚都在这里进行处理\nBankServiceImpl.java（service.Impl包下）\n\n```java\npublic class BankServiceImpl implements BankService {\n\tBankDao bankdao=new BankDaoImpl();\n\t@Override\n\tpublic List\u003cBankUser\u003e FindAllUser() {\n\t\tList\u003cBankUser\u003e list=null;\n\t\ttry {\n\t\t\tlist=bankdao.FindAllUser();\n\t\t} catch (SQLException e) {\n\t\t\t// TODO Auto-generated catch block\n\t\t\te.printStackTrace();\n\t\t}finally {\n\t\t\tconnUtil.closeConn();\n\t\t}\n\t\treturn list;\n\t}\n}\t\n```\n----\n#### Controller层（controller包下）\n当前台页面发出请求，最先会通过过滤器，过滤器会首先判断系统是否用角色登录，如果已经登录则转发该请求到controller层，由@WebServlet注解选择对应的servlet进行处理\nAddCardServlet.java\n```java\n@WebServlet(\"/addcard\")\npublic class AddCardServlet extends HttpServlet {\n\t@Override\n\tprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {\n\t\t// TODO Auto-generated method stub\n\t\tdoPost(req, resp);\n\t}\n\n\t@Override\n\tprotected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {\n\t\treq.setCharacterEncoding(\"UTF-8\");\n\t\tBankService bankService = new BankServiceImpl();\n\t\tBankCard card=new BankCard();\n\t\tBankUser user = new BankUser();\n\t\tcard.setBankuser(user);\n\t\tcard.setCpssword(Integer.valueOf(req.getParameter(\"password\")));\n\t\tcard.setCmoney(Double.valueOf(req.getParameter(\"cmoney\")));\n\t\tcard.setCtype(req.getParameter(\"ctype\"));\n\t\tcard.getBankuser().setUid(Integer.valueOf(req.getParameter(\"ID\")));\n\t\tboolean flag=bankService.AddCard(card);\n\t\tif(flag) {\n\t\t\tif(flag) {\n\t\t\t\tresp.sendRedirect(\"toaddcard\");\n\t\t\t}else {\n\t\t\t\tresp.sendRedirect(\"jsp/addcardError.jsp\");\n\t\t\t}\n\t\t}\n\t}\n}\n\n```\n----\n#### 核心思想\n![在这里插入图片描述](https://img-blog.csdnimg.cn/20210708210309150.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDUyNDY4Nw==,size_16,color_FFFFFF,t_70)\n#### Filter\n过滤器主要功能\n1.拦截所有请求\n2. 判断是否登录\n3. 已登陆发送的请求则通过并转发\n4. 未登录发送的请求则跳转到登录页\n\nMyFilter.java\n```java\n@WebFilter(\"/*\")\npublic class MyFilter implements Filter {\n\n\t@Override\n\tpublic void destroy() {\n\t\t// TODO Auto-generated method stub\n\t\t\n\t}\n\n\t@Override\n\tpublic void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)\n\t\t\tthrows IOException, ServletException {\n\t\tHttpServletRequest req=(HttpServletRequest) request;\n\t\tHttpServletResponse resp=(HttpServletResponse) response;\n\t\tString uri=req.getRequestURI();\n\t\tif(uri.endsWith(\"Login.jsp\")||uri.endsWith(\"login\")||uri.endsWith(\"checkaccount\")||uri.contains(\".css\") || uri.contains(\".js\") || uri.contains(\".png\")|| uri.contains(\".jpg\")) {//如果为登录请求\n\t\t\tchain.doFilter(request, response);\n\t\t}else {//不是去登录页面或登录请求\n\t\t\tString uname=(String)req.getSession().getAttribute(\"uname\");\n\t\t\tString mname=(String)req.getSession().getAttribute(\"mname\");\n\t\t\tif(uname!=null||mname!=null) {//管理员或者用户已登录\n\t\t\t\tchain.doFilter(request, response);\n\t\t\t}else{\n\t\t\t\treq.getSession().setAttribute(\"Needloginmsg\", \"something\");\n\t\t\t\tresp.sendRedirect(\"Login.jsp\");\t\t\t\n\t\t\t}\n\t\t}\n\t\t\n\t\t\n\t}\n\n\t@Override\n\tpublic void init(FilterConfig arg0) throws ServletException {\n\t\t// TODO Auto-generated method stub\n\t\t\n\t}\n}\n```\n\n\n\n#### 部分页面演示\n页面主要使用Layui前端模板框架编写，详细使用可参考[layui官网](https://www.layui.com/)\n![在这里插入图片描述](https://img-blog.csdnimg.cn/20210708210823639.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDUyNDY4Nw==,size_16,color_FFFFFF,t_70)\n![在这里插入图片描述](https://img-blog.csdnimg.cn/20210708210958271.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDUyNDY4Nw==,size_16,color_FFFFFF,t_70)\n![在这里插入图片描述](https://img-blog.csdnimg.cn/20210708211107458.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDUyNDY4Nw==,size_16,color_FFFFFF,t_70)","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fjingyibysutsoftware%2Fj2ee_bankmanager","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fjingyibysutsoftware%2Fj2ee_bankmanager","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fjingyibysutsoftware%2Fj2ee_bankmanager/lists"}