JavaWeb25.2【综合案例：properties & util & filter & pom】

druid.properties

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1 driverClassName=com.mysql.jdbc.Driver
2 url=jdbc:mysql://localhost:3306/hm_travel
3 username=root
4 password=root
5 initialSize=5
6 maxActive=10
7 maxWait=3000
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jedis.properties

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1 host=127.0.0.1
2 port=6379
3 maxTotal=50
4 maxIdle=10
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CharchaterFilter
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 1 package cn.haifei.travel.web.filter;
 2 
 3 import javax.servlet.*;
 4 import javax.servlet.annotation.WebFilter;
 5 import javax.servlet.http.HttpServletRequest;
 6 import javax.servlet.http.HttpServletResponse;
 7 import java.io.IOException;
 8 
 9 /**
10  * 解决全站乱码问题，处理所有的请求
11  */
12 @WebFilter("/*")
13 public class CharchaterFilter implements Filter {
14     @Override
15     public void init(FilterConfig filterConfig) throws ServletException {
16 
17     }
18 
19     @Override
20     public void doFilter(ServletRequest req, ServletResponse rep, FilterChain filterChain) throws IOException, ServletException {
21         //将父接口转为子接口
22         HttpServletRequest request = (HttpServletRequest) req;
23         HttpServletResponse response = (HttpServletResponse) rep;
24         //获取请求方法
25         String method = request.getMethod();
26         //解决post请求中文数据乱码问题
27         if(method.equalsIgnoreCase("post")){
28             request.setCharacterEncoding("utf-8");
29         }
30         //处理响应乱码
31         response.setContentType("text/html;charset=utf-8");
32         filterChain.doFilter(request,response);
33     }
34 
35     @Override
36     public void destroy() {
37 
38     }
39 }
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JDBCUtils
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 1 package cn.haifei.travel.util;
 2 
 3 import com.alibaba.druid.pool.DruidDataSourceFactory;
 4 
 5 import javax.sql.DataSource;
 6 import java.io.IOException;
 7 import java.io.InputStream;
 8 import java.sql.Connection;
 9 import java.sql.ResultSet;
10 import java.sql.SQLException;
11 import java.sql.Statement;
12 import java.util.Properties;
13 
14 /*
15     1. 声明静态数据源成员变量
16     2. 创建连接池对象
17     3. 定义公有的得到数据源的方法
18     4. 定义得到连接对象的方法
19     5. 定义关闭资源的方法
20  */
21 public class JDBCUtils {
22     // 1.    声明静态数据源成员变量
23     private static DataSource ds;
24 
25     // 2. 创建连接池对象
26     static {
27         // 加载配置文件中的数据
28         InputStream is = JDBCUtils.class.getClassLoader().getResourceAsStream("druid.properties");
29         Properties pp = new Properties();
30         try {
31             pp.load(is);
32             // 创建连接池，使用配置文件中的参数
33             ds = DruidDataSourceFactory.createDataSource(pp);
34         } catch (IOException e) {
35             e.printStackTrace();
36         } catch (Exception e) {
37             e.printStackTrace();
38         }
39     }
40 
41     // 3. 定义公有的得到数据源的方法
42     public static DataSource getDataSource() {
43         return ds;
44     }
45 
46     // 4. 定义得到连接对象的方法
47     public static Connection getConnection() throws SQLException {
48         return ds.getConnection();
49     }
50 
51     // 5.定义关闭资源的方法
52     public static void close(Connection conn, Statement stmt, ResultSet rs) {
53         if (rs != null) {
54             try {
55                 rs.close();
56             } catch (SQLException e) {}
57         }
58 
59         if (stmt != null) {
60             try {
61                 stmt.close();
62             } catch (SQLException e) {}
63         }
64 
65         if (conn != null) {
66             try {
67                 conn.close();
68             } catch (SQLException e) {}
69         }
70     }
71 
72     // 6.重载关闭方法
73     public static void close(Connection conn, Statement stmt) {
74         close(conn, stmt, null);
75     }
76 }
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JedisUtil
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 1 package cn.haifei.travel.util;
 2 
 3 import redis.clients.jedis.Jedis;
 4 import redis.clients.jedis.JedisPool;
 5 import redis.clients.jedis.JedisPoolConfig;
 6 
 7 import java.io.IOException;
 8 import java.io.InputStream;
 9 import java.util.Properties;
10 
11 /**
12  * Jedis工具类
13  */
14 public final class JedisUtil {
15     private static JedisPool jedisPool;
16 
17     static {
18         //读取配置文件
19         InputStream is = JedisPool.class.getClassLoader().getResourceAsStream("jedis.properties");
20         //创建Properties对象
21         Properties pro = new Properties();
22         //关联文件
23         try {
24             pro.load(is);
25         } catch (IOException e) {
26             e.printStackTrace();
27         }
28         //获取数据，设置到JedisPoolConfig中
29         JedisPoolConfig config = new JedisPoolConfig();
30         config.setMaxTotal(Integer.parseInt(pro.getProperty("maxTotal")));
31         config.setMaxIdle(Integer.parseInt(pro.getProperty("maxIdle")));
32 
33         //初始化JedisPool
34         jedisPool = new JedisPool(config, pro.getProperty("host"), Integer.parseInt(pro.getProperty("port")));
35 
36 
37     }
38 
39 
40     /**
41      * 获取连接方法
42      */
43     public static Jedis getJedis() {
44         return jedisPool.getResource();
45     }
46 
47     /**
48      * 关闭Jedis
49      */
50     public static void close(Jedis jedis) {
51         if (jedis != null) {
52             jedis.close();
53         }
54     }
55 }
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MailUtils
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 1 package cn.haifei.travel.util;
 2 
 3 import javax.mail.*;
 4 import javax.mail.internet.InternetAddress;
 5 import javax.mail.internet.MimeMessage;
 6 import java.util.Properties;
 7 
 8 /**
 9  * 发邮件工具类
10  */
11 public final class MailUtils {
12     private static final String USER = "yub4by@qq.com"; // 发件人称号，同邮箱地址
13     private static final String PASSWORD = ""; // 如果是qq邮箱可以使户端授权码，或者登录密码
14 
15     /**
16      *
17      * @param to 收件人邮箱
18      * @param text 邮件正文
19      * @param title 标题
20      */
21     /* 发送验证信息的邮件 */
22     public static boolean sendMail(String to, String text, String title){
23         try {
24             final Properties props = new Properties();
25             props.put("mail.smtp.auth", "true");
26             props.put("mail.smtp.host", "smtp.qq.com");
27 
28             // 发件人的账号
29             props.put("mail.user", USER);
30             //发件人的密码
31             props.put("mail.password", PASSWORD);
32 
33             // 构建授权信息，用于进行SMTP进行身份验证
34             Authenticator authenticator = new Authenticator() {
35                 @Override
36                 protected PasswordAuthentication getPasswordAuthentication() {
37                     // 用户名、密码
38                     String userName = props.getProperty("mail.user");
39                     String password = props.getProperty("mail.password");
40                     return new PasswordAuthentication(userName, password);
41                 }
42             };
43             // 使用环境属性和授权信息，创建邮件会话
44             Session mailSession = Session.getInstance(props, authenticator);
45             // 创建邮件消息
46             MimeMessage message = new MimeMessage(mailSession);
47             // 设置发件人
48             String username = props.getProperty("mail.user");
49             InternetAddress form = new InternetAddress(username);
50             message.setFrom(form);
51 
52             // 设置收件人
53             InternetAddress toAddress = new InternetAddress(to);
54             message.setRecipient(Message.RecipientType.TO, toAddress);
55 
56             // 设置邮件标题
57             message.setSubject(title);
58 
59             // 设置邮件的内容体
60             message.setContent(text, "text/html;charset=UTF-8");
61             // 发送邮件
62             Transport.send(message);
63             return true;
64         }catch (Exception e){
65             e.printStackTrace();
66         }
67         return false;
68     }
69 
70     public static void main(String[] args) throws Exception { // 做测试用
71         MailUtils.sendMail("1196006753@qq.com","你好，这是一封测试邮件，无需回复。","测试邮件");
72         System.out.println("发送成功");
73     }
74 
75 }
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Md5Util
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 1 package cn.haifei.travel.util;
 2 
 3 import java.security.MessageDigest;
 4 
 5 /**
 6  * 写一个MD5算法,运行结果与MySQL的md5()函数相同
 7  * 将明文密码转成MD5密码
 8  * 123456->e10adc3949ba59abbe56e057f20f883e
 9  */
10 public final class Md5Util {
11     
12     private Md5Util(){}
13     
14     /**
15      * 将明文密码转成MD5密码 
16      */
17     public static String encodeByMd5(String password) throws Exception{
18         //Java中MessageDigest类封装了MD5和SHA算法，今天我们只要MD5算法
19         MessageDigest md5 = MessageDigest.getInstance("MD5");
20         //调用MD5算法，即返回16个byte类型的值
21         byte[] byteArray = md5.digest(password.getBytes());
22         //注意：MessageDigest只能将String转成byte[]，接下来的事情，由我们程序员来完成
23         return byteArrayToHexString(byteArray);
24     }
25     
26     /**
27      * 将byte[]转在16进制字符串 
28      */
29     private static String byteArrayToHexString(byte[] byteArray) {
30         StringBuffer sb = new StringBuffer();
31         //遍历
32         for(byte b : byteArray){//16次
33             //取出每一个byte类型，进行转换
34             String hex = byteToHexString(b);
35             //将转换后的值放入StringBuffer中
36             sb.append(hex);
37         }
38         return sb.toString();
39     }
40     
41     /**
42      * 将byte转在16进制字符串 
43      */
44     private static String byteToHexString(byte b) {//-31转成e1，10转成0a，。。。
45         //将byte类型赋给int类型
46         int n = b;
47         //如果n是负数
48         if(n < 0){
49             //转正数
50             //-31的16进制数，等价于求225的16进制数 
51             n = 256 + n;
52         }
53         //商(14)，数组的下标
54         int d1 = n / 16;
55         //余(1)，数组的下标
56         int d2 = n % 16;
57         //通过下标取值
58         return hex[d1] + hex[d2];
59     }
60     
61     private static String[] hex = {"0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f"};
62     
63     /**
64      * 测试
65      */
66     public static void main(String[] args) throws Exception{
67         String password = "123456";
68         String passwordMD5 = Md5Util.encodeByMd5(password);
69         System.out.println(password);
70         System.out.println(passwordMD5);
71     }
72 }
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UuidUtil
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 1 package cn.haifei.travel.util;
 2 
 3 import java.util.UUID;
 4 
 5 /**
 6  * 产生UUID随机字符串工具类
 7  */
 8 public final class UuidUtil {
 9     
10     private UuidUtil(){}
11     
12     public static String getUuid(){
13         return UUID.randomUUID().toString().replace("-","");
14     }
15     
16     /**
17      * 测试
18      */
19     public static void main(String[] args) {
20         System.out.println(UuidUtil.getUuid());
21         System.out.println(UuidUtil.getUuid());
22         System.out.println(UuidUtil.getUuid());
23         System.out.println(UuidUtil.getUuid());
24     }
25 }
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 pom.xml

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  1 <?xml version="1.0" encoding="UTF-8"?>
  2 
  3 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  4   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  5   <modelVersion>4.0.0</modelVersion>
  6 
  7 
  8   <groupId>cn.haifei</groupId>
  9   <artifactId>travel</artifactId>
 10   <version>1.0-SNAPSHOT</version>
 11   <packaging>war</packaging>
 12 
 13 
 14     <dependencies>
 15         <dependency>
 16             <groupId>junit</groupId>
 17             <artifactId>junit</artifactId>
 18             <version>3.8.1</version>
 19             <scope>test</scope>
 20         </dependency>
 21         <!--servlet-->
 22         <dependency>
 23             <groupId>javax.servlet</groupId>
 24             <artifactId>javax.servlet-api</artifactId>
 25             <version>3.1.0</version>
 26             <scope>provided</scope>
 27         </dependency>
 28         <!--mysql驱动-->
 29         <dependency>
 30             <groupId>mysql</groupId>
 31             <artifactId>mysql-connector-java</artifactId>
 32             <version>5.1.26</version>
 33             <scope>compile</scope>
 34         </dependency>
 35         <!--druid连接池-->
 36         <dependency>
 37             <groupId>com.alibaba</groupId>
 38             <artifactId>druid</artifactId>
 39             <version>1.0.9</version>
 40         </dependency>
 41         <!--jdbcTemplate-->
 42         <dependency>
 43             <groupId>org.springframework</groupId>
 44             <artifactId>spring-core</artifactId>
 45             <version>4.1.2.RELEASE</version>
 46             <scope>compile</scope>
 47         </dependency>
 48         <dependency>
 49             <groupId>org.springframework</groupId>
 50             <artifactId>spring-jdbc</artifactId>
 51             <version>4.1.2.RELEASE</version>
 52             <scope>compile</scope>
 53         </dependency>
 54         <dependency>
 55             <groupId>org.springframework</groupId>
 56             <artifactId>spring-tx</artifactId>
 57             <version>4.1.2.RELEASE</version>
 58             <scope>compile</scope>
 59         </dependency>
 60         <dependency>
 61             <groupId>org.springframework</groupId>
 62             <artifactId>spring-beans</artifactId>
 63             <version>4.1.2.RELEASE</version>
 64             <scope>compile</scope>
 65         </dependency>
 66         <dependency>
 67             <groupId>commons-logging</groupId>
 68             <artifactId>commons-logging</artifactId>
 69             <version>1.1.1</version>
 70             <scope>compile</scope>
 71         </dependency>
 72         <!--beanUtils-->
 73         <dependency>
 74             <groupId>commons-beanutils</groupId>
 75             <artifactId>commons-beanutils</artifactId>
 76             <version>1.9.2</version>
 77             <scope>compile</scope>
 78         </dependency>
 79         <!--jackson-->
 80         <dependency>
 81             <groupId>com.fasterxml.jackson.core</groupId>
 82             <artifactId>jackson-databind</artifactId>
 83             <version>2.3.3</version>
 84         </dependency>
 85         <dependency>
 86             <groupId>com.fasterxml.jackson.core</groupId>
 87             <artifactId>jackson-core</artifactId>
 88             <version>2.3.3</version>
 89         </dependency>
 90         <dependency>
 91             <groupId>com.fasterxml.jackson.core</groupId>
 92             <artifactId>jackson-annotations</artifactId>
 93             <version>2.3.3</version>
 94         </dependency>
 95         <!--javaMail-->
 96         <dependency>
 97             <groupId>javax.mail</groupId>
 98             <artifactId>javax.mail-api</artifactId>
 99             <version>1.5.6</version>
100         </dependency>
101         <dependency>
102             <groupId>com.sun.mail</groupId>
103             <artifactId>javax.mail</artifactId>
104             <version>1.5.3</version>
105         </dependency>
106         <!--jedis-->
107         <dependency>
108             <groupId>redis.clients</groupId>
109             <artifactId>jedis</artifactId>
110             <version>2.7.0</version>
111         </dependency>
112     </dependencies>
113 
114 
115     <build>
116         <!--maven插件-->
117         <plugins>
118             <!--jdk编译插件-->
119             <plugin>
120                 <groupId>org.apache.maven.plugins</groupId>
121                 <artifactId>maven-compiler-plugin</artifactId>
122                 <configuration>
123                     <source>1.8</source>
124                     <target>1.8</target>
125                     <encoding>utf-8</encoding>
126                 </configuration>
127             </plugin>
128             <!--tomcat插件-->
129             <plugin>
130                 <groupId>org.apache.tomcat.maven</groupId>
131                 <!-- tomcat7的插件， 不同tomcat版本这个也不一样 -->
132                 <artifactId>tomcat7-maven-plugin</artifactId>
133                 <version>2.1</version>
134                 <configuration>
135                     <!-- 通过maven tomcat7:run运行项目时，访问项目的端口号 -->
136                     <port>80</port>
137                     <!-- 项目访问路径/虚拟目录-->
138                     <path>/travel</path>
139                 </configuration>
140             </plugin>
141         </plugins>
142     </build>
143 
144 
145 </project>
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