第一次写博客,主要是为了记录一下学习新技术的过程,好了,进入主题!
开发环境:JDK8,eclipse,maven3.5,oracle数据库,druid连接池
首先,建立一个maven工程,选webapp项目,pom.xml如下:
<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.bin.study</groupId> <artifactId>servlet-druid</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>servlet-druid Maven Webapp</name> <url>http://maven.apache.org</url> <properties> <!--统一版本 --> <spring-version>4.3.4.RELEASE</spring-version> <druid-version>1.1.10</druid-version> <maven.compiler.source.version>1.8</maven.compiler.source.version> <maven.compiler.target.version>1.8</maven.compiler.target.version> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/jstl --> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- mybatis核心包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.6</version> </dependency> <!-- mybatis/spring包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.2</version> </dependency> <!--oracle --> <!-- https://mvnrepository.com/artifact/com.oracle/ojdbc6 --> <dependency> <groupId>com.oracle</groupId> <artifactId>ojdbc6</artifactId> <version>12.1.0.1-atlassian-hosted</version> </dependency> <!-- Jetty --> <dependency> <groupId>org.eclipse.jetty.aggregate</groupId> <artifactId>jetty-all</artifactId> <version>8.0.4.v20111024</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring-version}</version> <scope>test</scope> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>${druid-version}</version> </dependency> </dependencies> <profiles> <profile> <id>jdk8</id> <activation> <activeByDefault>true</activeByDefault> <jdk>1.8</jdk> </activation> <properties> <maven.compiler.source>${maven.compiler.source.version}</maven.compiler.source> <maven.compiler.target>${maven.compiler.target.version}</maven.compiler.target> </properties> </profile> </profiles> <build> <finalName>servlet-druid</finalName> <plugins> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>2.3.2</version> <configuration> <source>${javac.target.version}</source> <target>${javac.target.version}</target> <encoding>UTF-8</encoding> </configuration> </plugin> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <version>2.1.1</version> </plugin> <plugin> <groupId>org.mortbay.jetty</groupId> <artifactId>jetty-maven-plugin</artifactId> <version>8.1.16.v20140903</version> <configuration> <scanIntervalSeconds>10</scanIntervalSeconds> <webApp> <contextPath>/study</contextPath> </webApp> <connectors> <connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector"> <port>8090</port> </connector> </connectors> </configuration> </plugin> </plugins> </build> </project>
spring配置文件如下,我这边取名为spring-base.xml:
<?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:p="http://www.springframework.org/schema/p" 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-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> <context:property-placeholder location="classpath:druid.properties" /> <!-- 自动扫描该包,使SpringMVC认为包下用了@controller注解的类是控制器 --> <context:component-scan base-package="com.bin.study" /> <!--静态资源不拦截 --> <mvc:resources location="/css/" mapping="/css/**" /> <mvc:resources location="/js/" mapping="/js/**" /> <!-- 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 /> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <property name="initialSize" value="1" /> <property name="minIdle" value="1" /> <property name="maxActive" value="20" /> <property name="maxWait" value="60000" /> <property name="timeBetweenEvictionRunsMillis" value="60000" /> <property name="minEvictableIdleTimeMillis" value="300000" /> <property name="testWhileIdle" value="true" /> <property name="testOnBorrow" value="false" /> <property name="testOnReturn" value="false" /> <property name="poolPreparedStatements" value="true" /> <property name="maxPoolPreparedStatementPerConnectionSize" value="20" /> <property name="filters" value="stat" /> </bean> <!-- spring jdbc NamedParameterJdbcTemplate --> <bean id="namedjdbctemp" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate"> <constructor-arg ref="dataSource" /> </bean> <!-- spring和MyBatis完美整合,不需要mybatis的配置映射文件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!-- 自动扫描mapping.xml文件 --> <!-- <property name="mapperLocations" value="classpath:com/cwj/mapping/*.xml"></property> --> </bean> <!-- DAO接口所在包名,Spring会自动查找其下的类 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.bin.study.dao" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean> <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 定义跳转的文件的前后缀 ,视图模式配置--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- 这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀,变成一个 可用的url地址 --> <property name="prefix" value="/WEB-INF/" /> <property name="suffix" value=".jsp" /> </bean> </beans>
数据库连接信息放在druid.properties
jdbc.driverClassName=oracle.jdbc.driver.OracleDriver jdbc.url=jdbc:oracle:thin:@127.0.0.1:1521:orcl jdbc.username=liubin_test jdbc.password=1105915292
web.xml配置如下:
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <display-name>Archetype Created Web Application</display-name> <!-- Spring和mybatis的配置文件 --> <!-- <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-mybatis.xml</param-value> </context-param> --> <!-- 编码过滤器 --> <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <async-supported>true</async-supported> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- Spring监听器 --> <!-- <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> --> <!-- 防止Spring内存溢出监听器 --> <!-- <listener> <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class> </listener> --> <servlet> <servlet-name>DruidStatView</servlet-name> <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>DruidStatView</servlet-name> <!--访问路径eg:http://localhost:8080/druid/index.html --> <url-pattern>/druid/*</url-pattern> </servlet-mapping> <filter> <filter-name>DruidWebStatFilter</filter-name> <filter-class>com.alibaba.druid.support.http.WebStatFilter</filter-class> <init-param> <param-name>exclusions</param-name> <param-value>*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*</param-value> </init-param> </filter> <filter-mapping> <filter-name>DruidWebStatFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- Spring MVC servlet --> <servlet> <servlet-name>SpringMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-base.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> <async-supported>true</async-supported> </servlet> <servlet-mapping> <servlet-name>SpringMVC</servlet-name> <!-- 此处可以可以配置成*.do,对应struts的后缀习惯 --> <url-pattern>/</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>/index.jsp</welcome-file> </welcome-file-list> <jsp-config> <jsp-property-group> <url-pattern>*.jsp</url-pattern> <el-ignored>false</el-ignored> <!-- <el-ignored>true</el-ignored> --> </jsp-property-group> </jsp-config> </web-app>
项目路径如下:
AreaDao类代码如下:
package com.bin.study.dao; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.annotation.Resource; import org.springframework.jdbc.core.BeanPropertyRowMapper; import org.springframework.jdbc.core.RowMapper; import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate; import org.springframework.stereotype.Repository; import com.bin.study.bean.Area; @Repository public class AreaDao { @Resource private NamedParameterJdbcTemplate namedjdbctemp; public Area queryAreaById(Long id) { String sql = "SELECT ID,LNG,LAT,AREA_NAME FROM EIS_WISEYE_AREA WHERE ID=:id"; Map<String, Object> map = new HashMap<String, Object>(); map.put("id", id); return namedjdbctemp.queryForObject(sql, map, new BeanPropertyRowMapper<Area>(Area.class)); } public List<Area> queryAll() { String sql = "SELECT LNG,LAT,AREA_NAME,ID " + " FROM (SELECT A.*, ROWNUM RN " + " FROM (SELECT LNG, LAT, AREA_NAME, id FROM EIS_WISEYE_AREA) A " + " WHERE ROWNUM <= 40) " + " WHERE RN >= 21"; RowMapper<Area> rm = BeanPropertyRowMapper.newInstance(Area.class); List<Area> queryForList = namedjdbctemp.query(sql, rm); return queryForList; } }
jsp代码如下:
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> <!-- 加/则是不加项目根路径 --> <link href="css/bootstrap.css" rel="stylesheet"></link> <script type="text/javascript" src="js/jquery-3.3.1.min.js"></script> <script type="text/javascript" src="js/bootstrap.min.js"></script> </head> <body> <table class="table table-bordered table-striped table-condensed text-center"> <tr class="table-danger"> <td>主键</td> <td>经度</td> <td>维度</td> <td>区域名称</td> </tr> <c:forEach items="${areas}" var="area"> <tr> <td>${area.id }</td> <td>${area.lng }</td> <td>${area.lat }</td> <td>${area.areaName }</td> </tr> </c:forEach> </table> </body> </html>
项目使用jetty启动,选择项目run config
等项目启动起来后,就可以直接访问
druid监控页面地址:http://localhost:8090/study/druid/index.html