毕业设计 - java web物资租赁系统的设计与实现【源码+论文】

刺骨的言语ヽ痛彻心扉 2024-03-30 09:56 73阅读 0赞

#### 文章目录 ####

*  前言
 *  一、项目设计
 *   *  1. 模块设计
     *  2. 实现效果
 *  二、部分源码
 *  项目工程

--------------------

## 前言 ##

今天学长向大家分享一个 java web设计项目:

**java web物资租赁系统的设计与实现**

--------------------

## 一、项目设计 ##

### 1. 模块设计 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21hdGhvcl9zaW5vcg_size_36_color_FAFF2F_t_70]  
系统主要功能包括：功能主要包括：用户管理，包括管理员信息查看、管理员密码修改；正常订单管理：包括新增正常订单、修改有误订单、删除错误订单；资金结算管理：费用统计；材料租赁管理：包括订单出租查询、器材回收管理、日租金管理、仓库库存管理。

### 2. 实现效果 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21hdGhvcl9zaW5vcg_size_36_color_FAFF2F_t_70 1]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21hdGhvcl9zaW5vcg_size_36_color_FAFF2F_t_70 2]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21hdGhvcl9zaW5vcg_size_36_color_FAFF2F_t_70 3]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21hdGhvcl9zaW5vcg_size_36_color_FAFF2F_t_70 4]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21hdGhvcl9zaW5vcg_size_36_color_FAFF2F_t_70 5]  
![在这里插入图片描述][3f42ed89ecfe487b8ab5456b694fb6bf.png]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21hdGhvcl9zaW5vcg_size_36_color_FAFF2F_t_70 6]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21hdGhvcl9zaW5vcg_size_36_color_FAFF2F_t_70 7]

## 二、部分源码 ##

部分代码示例：

4.5.1 采用JDBC的数据操作公共类
    package com.dao;
    import java.sql.*;
    public class DB
    {
        
    	protected Connection conn=null;
    	Private PreparedStatement pstmt=null;
    	private Statement stmt= null;
    	private ResultSet rs =null;
    //JDBC数据库连接配置信息
    	String driver = "com.mysql.jdbc.Driver";
    	String url = "jdbc:mysql://localhost/wz?useUnicode=true&characterEncoding=utf-8";
    	String user = "root";
    	String password = "root";
    //数据库连接方法
    	public Connection getConn() throws Exception
    	{
        
    		Class.forName(driver);
    		Connection conn = DriverManager.getConnection(url, user, password);
    		return conn;
    	}
    //关闭数据库操作方法
    	public void closeAll( Connection conn, PreparedStatement pstmt, ResultSet rs ) {
        
    //如果rs不空，关闭rs 
    if(rs != null){
        
    try{
        
    				rs.close();
    }catch(SQLException e){
        
    e.printStackTrace();
    }
    }
    //如果pstmt不空，关闭pstmt
    if(pstmt != null){
        
    try {
         
    pstmt.close();
    } catch (SQLException e){
        
    e.printStackTrace();
    }
    }
    		//如果conn不空，关闭conn  
    if(conn != null){
        
    		try {
        
    conn.close();
    } catch (SQLException e){
        
    e.printStackTrace();
    }
    }
    }
    }
    4.5.2 乱码过滤器
    过滤器类：
    package com.untils;
    import java.io.IOException;
    import javax.servlet.Filter;
     
    import javax.servlet.FilterChain;
    import javax.servlet.FilterConfig;
    import javax.servlet.ServletException;
    import javax.servlet.ServletRequest;
    import javax.servlet.ServletResponse;
    public class CharactorFilter implements Filter {
         
    	//继承Filter类
    //字符编码
    String encoding=null;
    public void doFilter(ServletRequest request, ServletResponse response,FilterChain 	chain) throws IOException, ServletException {
        
    if(encoding!=null){
        
    //设置request字符编码
    request.setCharacterEncoding(encoding);
    //设置response字符编码
    response.setContentType("text/html;charset="+encoding);
    }
    //传递给下一个过滤器
    chain.doFilter(request, response);
    }
    public void init(FilterConfig filterConfig) throws ServletException {
        
    //获取初始化参数
    encoding=filterConfig.getInitParameter("encoding");
    }
    public void destroy() {
        
    encoding=null;
    }
    }
    过滤器配置（在web.xml文件中进行过滤器的配置）：
    <filter> 
     
    <filter-name>CharactorFilter</filter-name>
     
    <filter-class>cn.com.Filter.CharactorFilter</filter-class> 
    		
    		<init-param> 
    			
    			<param-name>encoding</param-name> 
    			
    			<param-value>utf-8</param-value> 
    		</init-param>
    </filter>
    
    <filter-mapping> 
    
    <filter-name>CharactorFilter</filter-name>
    
    <url-pattern>/*</url-pattern>
    </filter-mapping>
    4.5.3 404、500异常处理
    拦截异常配置：
    
    <error-page> 
    <error-code>404</error-code>
    <location>/404.htm</location>
    </error-page>
    <error-page>
    <error-code>500</error-code> 
    <location>/500.htm</location>
    </error-page>
    异常拦截跳转页面：
    如果出现404错误，跳转至404.htm
    如果出现500错误，跳转至500.htm

## 项目工程 ##

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21hdGhvcl9zaW5vcg_size_36_color_FAFF2F_t_70 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/3c3d96b11a96466ca24688a4fc2120d4.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L21hdGhvcl9zaW5vcg_size_36_color_FAFF2F_t_70 2]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/8d73734a1b844be694e2f2bd4e8dcfec.png
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[3f42ed89ecfe487b8ab5456b694fb6bf.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/fb1a111186ae404cb1b55059d64094c7.png
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