Intellij IDEA +MAVEN+Jetty实现SpringMVC简单查询功能
利用 Intellij IDEA +MAVEN+Jetty实现SpringMVC读取数据库数据并显示在页面上的简单功能
1 新建maven项目，配置pom.xml
<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>SpringJDBCTest1</groupId>
<artifactId>SpringJDBCTest1</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>SpringJDBCTest1 Maven Webapp</name>
<url>http://maven.apache.org</url> <dependencies> <!--spring-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>4.3.1.RELEASE</version>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.3.1.RELEASE</version>
</dependency> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.3.1.RELEASE</version>
</dependency> <!--Spring Web + Spring MVC-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.3.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.1.RELEASE</version>
</dependency> <!--NoClassDefFoundError: javax/servlet/jsp/jstl/core/Config-->
<!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency> <dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency> <!--servlet/jsp api start-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency> <!-- https://mvnrepository.com/artifact/javax.servlet.jsp/jsp-api -->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
</dependency> <!--mysql driver-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency> <!--jdbc-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>3.0.5.RELEASE</version>
</dependency> <!--c3p0-->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.1</version>
</dependency> <!--aspectj-->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.6</version>
</dependency> <dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.8.6</version>
</dependency> <!--mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.3.0</version>
</dependency> <!--mybatis spring整合-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.3</version>
</dependency> </dependencies> <build>
<finalName>SpringJDBCTest1</finalName> <plugins>
<!--servlet容器 jetty插件-->
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>9.3.10.v20160621</version>
</plugin> <!--mybatis 逆向工程插件-->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<configuration>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
2 src-main下建java源包（设置成source folder），建com.springjdbc根包，
分别建controller,dao,entities等包：
EmployeeController.java
package com.springjdbc.controller; import com.springjdbc.dao.EmployeeDao;
import com.springjdbc.entities.Employee;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod; import java.util.List;
import java.util.Map; /**
* Created by wanggenshen_sx on 2016/12/23.
*/
@Controller
public class EmployeeController { private ApplicationContext ctx=null;
private JdbcTemplate jdbcTemplate=null;
private EmployeeDao employeeDao ;
private NamedParameterJdbcTemplate namedParameterJdbcTemplate=null;
{
ctx=new ClassPathXmlApplicationContext("applicationContext.xml");
jdbcTemplate =(JdbcTemplate) ctx.getBean("jdbcTemplate");
employeeDao = ctx.getBean(EmployeeDao.class);
namedParameterJdbcTemplate=(NamedParameterJdbcTemplate) ctx.getBean("namedParameterJdbcTemplate"); } @RequestMapping(value = "/listAllEmployee",method = RequestMethod.GET)
public String list(Map<String,Object> map){
String sql="SELECT id, lastName,email FROM employee";
RowMapper<Employee> rowMapper=new BeanPropertyRowMapper<>(Employee.class);
List<Employee> employees=jdbcTemplate.query(sql, rowMapper);
map.put("employees",employees);
return "list";
}
}
EmployeeDao.java
package com.springjdbc.dao; import com.springjdbc.entities.Employee;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.stereotype.Repository; /**
* Created by wanggenshen_sx on 2016/12/23.
*/
@Repository
public class EmployeeDao {
@Autowired
private JdbcTemplate jdbcTemplate; public Employee get(int id){
String sql="SELECT id, lastName,email FROM employee WHERE id=?";
RowMapper<Employee> rowMapper=new BeanPropertyRowMapper<>(Employee.class);
Employee employee=jdbcTemplate.queryForObject(sql, rowMapper,id); return employee;
}
}
Employee.java
package com.springjdbc.entities; /**
* Created by wanggenshen_sx on 2016/12/23.
*/
public class Employee { private int id;
private String lastName;
private String email; public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
@Override
public String toString() {
return "Employee [id=" + id + ", lastName=" + lastName + ", email="
+ email+" ]" ;
}
}
3 webapp --- WEB-INF --下建views包，新建显示页面
list.jsp:
<%--
Created by IntelliJ IDEA.
User: wanggenshen_sx
Date: 2016/12/23
Time: 16:56
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>Show Page</title>
</head>
<body>
<table border="1" cellspacing="0" cellpadding="10">
<tr>
<th>ID</th>
<th>LastName</th>
<th>Email</th>
</tr> <c:forEach items="${employees}" var="emp">
<tr>
<th>${emp.id}</th>
<th>${emp.lastName}</th>
<th>${emp.email}</th>
</tr>
</c:forEach>
</table>
</body>
</html>
4 配置
1）web.xml
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0"> <!--配置springmvc DispatcherServlet-->
<servlet>
<servlet-name>springmvc-servlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc-servlet.xml</param-value>
</init-param> <load-on-startup>1</load-on-startup>
</servlet> <servlet-mapping>
<servlet-name>springmvc-servlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping> <context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param> <listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener> </web-app>
note:此处加红处显示，最好是指定classpath,这样一眼看到就知道文件的位置。
2）resources包：新建spring配置文件（注意psring配置文件中扫描的包一定是controller包以外的包）
<?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:tx="http://www.springframework.org/schema/tx"
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-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"> <context:component-scan base-package="com.springjdbc.dao"></context:component-scan> <!-- 导入资源文件 -->
<context:property-placeholder location="classpath:db.properties"/>
<!-- 配置C3P0数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="user" value="${jdbc.user}"></property>
<property name="password" value="${jdbc.password}"></property>
<property name="driverClass" value="${jdbc.driverClass}"></property>
<property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property> <property name="initialPoolSize" value="${jdbc.initPoolSize}"></property>
<property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property> </bean> <!-- 配置spring-jdbcTemplate模板 -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>
</bean> <!-- 配置 NamedParameterJdbcTemplate,
该对象可以使用具名参数, 其没有无参数的构造器, 所以必须为其构造器指定参数 -->
<bean id="namedParameterJdbcTemplate" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate">
<constructor-arg ref="dataSource"></constructor-arg>
</bean> <!-- 配置事务管理器 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean> <!-- 启用事务注解 -->
<tx:annotation-driven transaction-manager="transactionManager"/> <!-- spring注解模式配置 -->
<context:annotation-config/> </beans>
3）SpringMVC的配置文件：
<?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:tx="http://www.springframework.org/schema/tx"
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-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd"> <context:component-scan base-package="com.springjdbc.dao"></context:component-scan> <!-- 导入资源文件 -->
<context:property-placeholder location="classpath:db.properties"/>
<!-- 配置C3P0数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="user" value="${jdbc.user}"></property>
<property name="password" value="${jdbc.password}"></property>
<property name="driverClass" value="${jdbc.driverClass}"></property>
<property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property> <property name="initialPoolSize" value="${jdbc.initPoolSize}"></property>
<property name="maxPoolSize" value="${jdbc.maxPoolSize}"></property> </bean> <!-- 配置spring-jdbcTemplate模板 -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"></property>
</bean> <!-- 配置 NamedParameterJdbcTemplate,
该对象可以使用具名参数, 其没有无参数的构造器, 所以必须为其构造器指定参数 -->
<bean id="namedParameterJdbcTemplate" class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate">
<constructor-arg ref="dataSource"></constructor-arg>
</bean> <!-- 配置事务管理器 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean> <!-- 启用事务注解 -->
<tx:annotation-driven transaction-manager="transactionManager"/> <!-- spring注解模式配置 -->
<context:annotation-config/> </beans>
4）连接数据库的配置文件：db.properties
jdbc.user=root
jdbc.password=920614
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.jdbcUrl=jdbc:mysql:///mytest?useUnicode=true&characterEncoding=utf-8 jdbc.initPoolSize=5
jdbc.maxPoolSize=10
项目架构：
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