spring mvc 環境搭建

web.xml 

<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">

	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>

	<context-param>
		<param-name>log4jRefreshInterval</param-name>
		<param-value>3000</param-value>
	</context-param>

	<listener>
		<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
	</listener>

	<context-param>
		<param-name>webAppRootKey</param-name>
		<param-value>webapp.root</param-value>
	</context-param>

	<!-- spring core 配置 -->
	<servlet>
		<servlet-name>spring</servlet-name>
		<!-- 該攔截器默認加載servlet.xml 格式的 -->
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<!-- load-on-startup：表示啓動容器時初始化該Servlet -->
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:main-servlet.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>


	<!-- 所有的請求交由spring進行攔截 -->
	<servlet-mapping>
		<servlet-name>spring</servlet-name>
		<url-pattern>/api/*</url-pattern>
	</servlet-mapping>


</web-app>

main-servlet.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">
                          
	<!-- 掃描com.eazy下面的所有註解 -->
	<context:component-scan base-package="com.eazy" /> 
	
	<mvc:annotation-driven />
	
	
	<!-- 引入配置文件 -->
	<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="location" value="classpath:db.properties" />
	</bean>

	<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
		destroy-method="close">
		<property name="driverClassName" value="${db.driver}" />
		<property name="url" value="${db.url}" />
		<property name="username" value="${db.username}" />
		<property name="password" value="${db.password}" />
		<!-- 初始化連接大小 -->
		<property name="initialSize" value="${initialSize}"></property>
		<!-- 連接池最大數量 -->
		<property name="maxActive" value="${maxActive}"></property>
		<!-- 連接池最大空閒 -->
		<property name="maxIdle" value="${maxIdle}"></property>
		<!-- 連接池最小空閒 -->
		<property name="minIdle" value="${minIdle}"></property>
		<!-- 獲取連接最大等待時間 -->
		<property name="maxWait" value="${maxWait}"></property>
	</bean>
	
	<!-- 定義事務管理 -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
		p:dataSource-ref="dataSource" />
		
		
	<!-- 配置Jdbc模板 -->
	<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
		<property name="dataSource" ref="dataSource" />
	</bean>

	<!-- 文件上傳 -->
	<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  
        <property name="defaultEncoding" value="utf-8"></property>   
        <property name="maxUploadSize" value="10485760000"></property>  
        <property name="maxInMemorySize" value="40960"></property>  
    </bean>  
	
	<!-- 轉換返回json格式配置 -->
	<bean
		class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
		<property name="messageConverters">
			<list>
				<ref bean="mappingJacksonHttpMessageConverter" />
			</list>
		</property>
	</bean>

	<bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" />
</beans>

db.properties

db.driver=com.mysql.jdbc.Driver
db.url=jdbc:mysql://127.0.0.1:3306/test
db.username=accp
db.password=
#\u5B9A\u4E49\u521D\u59CB\u8FDE\u63A5\u6570  
initialSize=0
#\u5B9A\u4E49\u6700\u5927\u8FDE\u63A5\u6570  
maxActive=20
#\u5B9A\u4E49\u6700\u5927\u7A7A\u95F2  
maxIdle=20
#\u5B9A\u4E49\u6700\u5C0F\u7A7A\u95F2  
minIdle=1
#\u5B9A\u4E49\u6700\u957F\u7B49\u5F85\u65F6\u95F4  
maxWait=60000

log4j

log4j.rootLogger=DEBUG, CONSOLE,FILE
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss,SSS} [%c]-[%p] %m%n


log4j.appender.FILE=org.apache.log4j.RollingFileAppender
log4j.appender.FILE.File=E://log/login_server.log
log4j.appender.FILE.MaxFileSize=4000KB
log4j.appender.FILE.MaxBackupIndex=10
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%c]-[%p] %m%n

log4j.logger.org.apache.commons.httpclient.HttpClient=ERROR
log4j.logger.org.apache.commons.httpclient.params.DefaultHttpParams=ERROR
log4j.logger.org.apache.commons.httpclient.methods.EntityEnclosingMethod=ERROR
log4j.logger.org.apache.commons.httpclient.HttpMethodBase=ERROR
log4j.logger.org.apache.commons.httpclient.HttpConnection=ERROR
log4j.logger.httpclient.wire.content=ERROR
log4j.logger.httpclient.wire.header=ERROR

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dao層代碼

package com.eazy.dao;

import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

// 標註爲Dao層 默認當前類名
@Repository
public class UserDao {

	@Autowired 
	private JdbcTemplate jdbcTemplate;
	
	// 查詢用戶列表
	public List<Map<String,Object>> selectUser() {
		return jdbcTemplate.queryForList("select * from user");
	}
}

service 層代碼

package com.eazy.service;

import java.util.List;
import java.util.Map;

public interface UserService {

	public List<Map<String,Object>> selectUser();
}

service impl

package com.eazy.service.impl;

import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.eazy.dao.UserDao;
import com.eazy.service.UserService;

// 服務標註，推薦使用
@Service
public class UserServiceImpl implements UserService {

	@Autowired
	private UserDao userDao;
	
	public List<Map<String, Object>> selectUser() {
		return userDao.selectUser();
	}

}

controller

package com.eazy.controller;

import java.util.HashMap;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import com.eazy.service.UserService;

@Controller
@RequestMapping("/user")
public class UserController {

	// controller 提供spring restful 功能，把返回數據提供給手機端，適合用於api 提供
	
	@Autowired
	private UserService userService;
	
	@RequestMapping(value = "list" , method = RequestMethod.GET)
	@ResponseBody
	public Map<String,Object> selectUser() {
		Map<String,Object> map = new HashMap<String,Object>();
		map.put("result", userService.selectUser());
		return map;
	}
}