Spring + SpringMVC + Mybatis + Maven 搭建Web工程

sm702

　　我个人觉得以前“如日中天”SSH框架搭建Web工程，并不是最好搭配。就拿Hibernate来说，对于很大一部分程序员根本用不好它，而且当网站越大后，Hibernate也就显得很无力。
　　运用大工厂Spring强大的注入功能和运用轻量和SQL明确的Mybatis作为持久层，同时用Maven统一协调管理好JAR包。搭建这样的Web也是非常快速与简便的。
　　现在我把重要的配置都贴出来，供大家参考。
　　(本例子的视图层是用JSON表示，因为该例子是用于作为Android工程API使用的，当然要换成其它视图层形式，例如JSP，也是很容易的。)
　　pom.xml
　　（在该文件当中，我也把Jetty配置好了。）

<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.cloud.android.spring</groupId>
<artifactId>android-api</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>android-api Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.7</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>  
<artifactId>spring-webmvc</artifactId>  
<version>3.1.1.RELEASE</version>  
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>3.1.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.1.1</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.0.3</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>commons-pool</groupId>
<artifactId>commons-pool</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-lgpl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-lgpl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
</dependencies>
<build>
<finalName>android-api</finalName>
<plugins>
<plugin>   
<groupId>org.mortbay.jetty</groupId>
<artifactId>maven-jetty-plugin</artifactId>
<version>6.1.10</version>
<configuration>
<contextPath>/api</contextPath>      
<connectors>      
<connector implementation="org.mortbay.jetty.nio.SelectChannelConnector">  
<port>8080</port>      
</connector>      
</connectors>
<scanIntervalSeconds>3</scanIntervalSeconds>
</configuration>   
</plugin>  
</plugins>
</build>
</project>

　　applicationContext.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:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<bean name="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/android_data?useUnicode=true&amp;characterEncoding=UTF-8"/>
<property name="username" value="root"/>
<property name="password" value="123"/>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mapperLocations" value="classpath:com/cloud/android/spring/model/*Mapper.xml" />
</bean>
<!-- Dao -->
<bean id="baseDao" class="com.cloud.android.spring.dao.impl.BaseDaoImpl">
<property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>
<bean id="userDao" class="com.cloud.android.spring.dao.impl.UserDaoImpl" parent="baseDao" />
<bean id="userService" class="com.cloud.android.spring.service.impl.UserServiceImpl">
<property name="userDao" ref="userDao" />
</bean>
</beans>
　　spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" 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" xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<mvc:annotation-driven />
<!-- 自动扫描controller包下的所有类，使其认为spring mvc的控制器 -->
<context:component-scan base-package="com.cloud.android.spring.controller" />
</beans>
　　web.xml

<?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"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>android-api</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:*Context.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<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-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
　　实体层代码：
　　User.java

package com.cloud.android.spring.model;
public class User {
private int id;
private String name;
private String password;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public User() {
}
public User(int id) {
this.id = id;
}
public User(String name) {
this.name = name;
}
public User(String name, String password) {
this.name = name;
this.password = password;
}
}
　　UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.cloud.android.spring.model.User">
<resultMap id="UserMapper" type="com.cloud.android.spring.model.User">
<id column="id" property="id"/>
<result column="name" property="name"/>
<result column="password" property="password"/>
</resultMap>
<select id="get" resultMap="UserMapper" parameterType="com.cloud.android.spring.model.User">
SELECT * FROM user
<where>
<if test="id != 0">
id = #{id}
</if>
<if test="name != null">
AND name = #{name}
</if>
</where>
</select>
<insert id="add" parameterType="com.cloud.android.spring.model.User">
INSERT INTO user(`name`, `password`) VALUES (#{name}, #{password})
</insert>
</mapper>
　　Dao层代码：
　　BaseDao.java

package com.cloud.android.spring.dao;
import java.util.List;
public interface BaseDao<T> {
public T get(String classMethod, T entry);
public List<T> getAll(String classMethod);
public boolean add(String classMethod, T entry);
public boolean edit(String classMethod, T entry);
public boolean remove(String classMethod, T entry);
}
　　BaseDaoImpl.java

package com.cloud.android.spring.dao.impl;
import java.util.ArrayList;
import java.util.List;
import org.mybatis.spring.support.SqlSessionDaoSupport;
import com.cloud.android.spring.dao.BaseDao;
public class BaseDaoImpl<T> extends SqlSessionDaoSupport implements BaseDao<T> {
@Override
public T get(String classMethod, T entry) {
T result = null;
result = this.getSqlSession().selectOne(classMethod, entry);
return result;
}
@Override
public List<T> getAll(String classMethod) {
List<T> results = new ArrayList<T>();
results = this.getSqlSession().selectList(classMethod);
return results;
}
@Override
public boolean add(String classMethod, T entry) {
boolean flag = false;
flag = this.getSqlSession().insert(classMethod, entry) > 0 ? true : false;
return flag;
}
@Override
public boolean edit(String classMethod, T entry) {
boolean flag = false;
flag = this.getSqlSession().update(classMethod, entry) > 0 ? true : false;
return flag;
}
@Override
public boolean remove(String classMethod, T entry) {
boolean flag = false;
flag = this.getSqlSession().delete(classMethod, entry) > 0 ? true : false;
return flag;
}
}
　　UserDao.java

package com.cloud.android.spring.dao;
import com.cloud.android.spring.model.User;
public interface UserDao extends BaseDao<User> {
}
　　UserDaoImpl.java

package com.cloud.android.spring.dao.impl;
import com.cloud.android.spring.dao.UserDao;
import com.cloud.android.spring.model.User;
public class UserDaoImpl extends BaseDaoImpl<User> implements UserDao {
}
　　Service层代码：
　　UserService.java

package com.cloud.android.spring.service;
import com.cloud.android.spring.model.User;

public interface UserService {
public User getUserById(int id);
public User getUserByName(String name);
public boolean addUser(String name, String password);
}
　　UserServiceImpl.java

package com.cloud.android.spring.service.impl;
import com.cloud.android.spring.constant.Constants;
import com.cloud.android.spring.dao.UserDao;
import com.cloud.android.spring.model.User;
import com.cloud.android.spring.service.UserService;
public class UserServiceImpl implements UserService {
private UserDao userDao;
private String className = User.class.getName();
public void setUserDao(UserDao userDao) {
this.userDao = userDao;
}
@Override
public User getUserById(int id) {
User user = new User(id);
return this.userDao.get(className + Constants.GET, user);
}
@Override
public User getUserByName(String name) {
User user = new User(name);
return this.userDao.get(className + Constants.GET, user);
}
@Override
public boolean addUser(String name, String password) {
boolean flag = false;
User user = new User(name, password);
flag = this.userDao.add(className + Constants.ADD, user);
return flag;
}

}
　　Controller层代码：
　　UserController.java

package com.cloud.android.spring.controller;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
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.cloud.android.spring.constant.Constants;
import com.cloud.android.spring.model.Message;
import com.cloud.android.spring.model.User;
import com.cloud.android.spring.service.UserService;
import com.cloud.android.spring.util.StringUtil;
@Controller
@RequestMapping(value = "/user", method = RequestMethod.GET)
public class UserController {
@Resource
private UserService userService;
@RequestMapping(value = "/select", method = RequestMethod.GET)
@ResponseBody
public Object getUser(String id, String name, HttpServletRequest request, HttpServletResponse response) {
User user = new User();
if (StringUtil.isEmpty(id)) {
if (StringUtil.isEmpty(name)) {
return Message.noContent(null);
}
user = userService.getUserByName(name.trim());
} else {
try {
int idInt = Integer.parseInt(id);
user = userService.getUserById(idInt);
} catch (Exception e) {
return Message.error(Constants.INCORRECT_PARAMETER);
}
}
if (null == user) {
return Message.noContent(user);
}
return Message.ok(user);
}
@RequestMapping(value = "/add", method = RequestMethod.GET)
@ResponseBody
public Object addUser(String name, String password, HttpServletRequest request, HttpServletResponse response) {
if (StringUtil.isEmpty(name) || StringUtil.isEmpty(password)) {
return Message.error(Constants.INCORRECT_PARAMETER);
}
boolean status = userService.addUser(name, password);
if (status) {
return Message.ok(Constants.SUCCESS);
}
return Message.noContent(Constants.FAILED);
}
}
　　常量类：
　　Constants.java

package com.cloud.android.spring.constant;
public class Constants {
// The parameters
public static String ID = "id";
public static String NAME = "name";
// String value
public static String EMPTY = "";
public static String INCORRECT_PARAMETER = "Incorrect parameter.";
// Sql flag
public static String ADD = ".add";
public static String EDIT = ".edit";
public static String REMOVE = ".remove";
public static String GET = ".get";
public static String GET_ALL = ".getAll";
// Operate status
public static String SUCCESS = "success";
public static String FAILED = "failed";
}
　　工具类：
　　StringUtil.java

package com.cloud.android.spring.util;
import com.cloud.android.spring.constant.Constants;
public class StringUtil {
public static boolean isEmpty(String str) {
if (null == str || Constants.EMPTY.equals(str)) {
return true;
}
return false;
}
}
　　还有一个用于包装JSON的类：
　　Message.java

package com.cloud.android.spring.model;
import java.util.HashMap;
import java.util.Map;
public class Message {
private static String DATA = "data";
private static String STATUS = "status";
public static Object ok(Object obj) {
Object result = dealWithMessage(obj, 200);
return result;
}
public static Object error(Object obj) {
Object result = dealWithMessage(obj, 500);
return result;
}
public static Object noContent(Object obj) {
Object result = dealWithMessage(obj, 204);
return result;
}
private static Object dealWithMessage(Object obj, int status) {
Map<String, Object> result = new HashMap<String, Object>();
result.put(DATA, obj);
result.put(STATUS, status);
return result;
}
}