测试apache-tomcat 项目

测试apache-tomcat 项目

1. 新建项目工程
2. 配置tomcat
   

1. 配置依赖 （pom.xml）

2. 编写代码

3. 项目工程目录截图
   

4. 代码编写

编写 pom.xml 文件 （配置依赖）

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.xiang</groupId>
    <artifactId>mavenTest</artifactId>
    <version>1.0-SNAPSHOT</version>
    <name>mavenTest</name>
    <packaging>war</packaging>

    <!-- 依赖软件包版本 -->
    <properties>
        <commons-lang.version>2.6</commons-lang.version>
        <spring.version>5.3.9</spring.version>
        <slf4j.version>2.0.0-alpha5</slf4j.version>
        <maven.compiler.target>1.8</maven.compiler.target>
        <maven.compiler.source>1.8</maven.compiler.source>
        <junit.version>5.7.1</junit.version>
    </properties>

    <!-- 配置依赖管理包 -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-framework-bom</artifactId>
                <version>${spring.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <!--  依赖配置节点-->
    <dependencies>
        <!--springMVC依赖包-->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.9</version>
        </dependency>


        <!-- 通用依赖包  -->
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>${commons-lang.version}</version>
        </dependency>

        <!--日志依赖包-->
        <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-log4j12 -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>2.0.0-alpha5</version>
            <scope>test</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>2.0.0-alpha5</version>
        </dependency>

        <!-- json依赖包 -->
        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.13.0-rc2</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.13.0-rc2</version>
        </dependency>

        <dependency>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
            <version>1.9.13</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.13.0-rc2</version>
        </dependency>


        <!--    MySQL驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.25</version>
        </dependency>


        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.3.1</version>
            </plugin>
        </plugins>
    </build>
</project>

DBTest 类；测试连接数据库

package com.xiang.lesson01;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DBTest {

    private static String URL = "jdbc:mysql://localhost:3307/webapp2?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=false";
    private static String DriverClass = "com.mysql.cj.jdbc.Driver";
    private static String UserName = "webapp1";
    private static String PassWord = "webapp1";
    private static Connection connection = null;

    public static Connection getConnection() {
        try {
            Class.forName(DriverClass);
            connection = DriverManager.getConnection(URL, UserName, PassWord);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        return connection;
    }

//    public  void  closeRerource(Connection connection){
//        try {
//            connection.close();
//        } catch (SQLException throwables) {
//            throwables.printStackTrace();
//        }
//    }

    public static void closeRerource() {
        if (connection != null) {
            try {
                connection.close();
            } catch (SQLException throwables) {
                throwables.printStackTrace();
            }
        }
    }

    public static void main(String[] args) {
        connection = DBTest.getConnection();
        if (connection != null) {
            System.out.println("连接成功");
        } else {
            System.out.println("连接失败");
        }
        closeRerource();
    }

}

DBMaven类；查询数据库

package com.xiang.lesson01;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

@WebServlet(urlPatterns = "/index")
public class DBMaven extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        Connection connection = DBTest.getConnection();
        try {
            PreparedStatement preparedStatement = connection.prepareStatement("select  * from student");
            ResultSet resultSet = preparedStatement.executeQuery();
            while (resultSet.next()){
                System.out.println(
                        resultSet.getInt("s_id") + "	" +
                                resultSet.getString("s_name") + "	" +
                                resultSet.getString("s_sex") + "	" +
                                resultSet.getDate("s_birthday") + "	" +
                                resultSet.getInt("s_professional"));
            }

        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        try {
            connection.close();
        } catch (SQLException throwables) {
            throwables.printStackTrace();
        }
        req.getRequestDispatcher("/index.jsp").forward(req,resp);
    }

}

编写 mvc-dispatcher-servlet.xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 扫描控制器 -->
    <context:component-scan base-package="com.xiang">
        <context:include-filter type="annotation"
                                expression="org.springframework.stereotype.Controller" />
    </context:component-scan>
    <!-- 扩充了注解驱动，可以将请求参数绑定到控制器参数 -->
    <mvc:annotation-driven />

    <!-- 静态资源处理， css， js， imgs -->
    <mvc:resources mapping="/resource/css/**" location="/resource/css/" />
    <mvc:resources mapping="/resource/js/**" location="/resource/js/" />
    <mvc:resources mapping="/resource/image/**" location="/resource/image/" />

    <!-- 配置试图解析器 -->
    <bean
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass"
                  value="org.springframework.web.servlet.view.JstlView"></property>
        <!-- 配置jsp文件前缀及后缀 -->
        <property name="prefix" value="/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
</beans>

编写 springApplication.xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
		http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
		">
</beans>

编写 web.xml 文件

<!DOCTYPE web-app>

<web-app>
  <display-name>Archetype Created Web Application</display-name>
  <!-- 欢迎页面 -->
  <welcome-file-list>
    <welcome-file>login.jsp</welcome-file>
  </welcome-file-list>

  <!-- 配置spring 上下文 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:springApplication.xml</param-value>
  </context-param>

  <!-- 配置监听器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <!-- spring mvc的配置上下文 -->
  <servlet>
    <servlet-name>mvc-dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:mvc-dispatcher-servlet.xml</param-value>
    </init-param>

    <load-on-startup>1</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>mvc-dispatcher</servlet-name>
    <!-- 拦截所有请求 -->
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <!-- 编码过滤器 -->
  <filter>
    <filter-name>characterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

编写 index.jsp 文件

<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
    <title>JSP - Hello World</title>
</head>
<body>
<h1><%= "Hello World!" %>
</h1>
<br/>
<a href="/mavenTest">Hello Servlet</a>
</body>
</html>

编写 login.jsp 文件

<%--
  Created by IntelliJ IDEA.
  User: Xiang
  Date: 2021/9/9
  Time: 11:31
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>

<body>
<h1><%= "login" %>
</h1>
<br/>
<a href="/mavenTest/index">login</a>
</body>
</html>

运行截图