Spring + SpringMVC + Mybatis + Maven 筹建Web工程

Spring + SpringMVC + Mybatis + Maven 搭建Web工程

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。

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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。

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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。)

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pom.xml

（在该文件当中，我也把Jetty配置好了。）

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<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>

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applicationContext.xml

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<?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" 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" ref="dataSource"/>        <property name="mapperLocations" value="classpath:com/cloud/android/spring/model/*Mapper.xml" />    </bean>    <!-- Dao -->    <bean id="baseDao" ref="sqlSessionFactory" />    </bean>    <bean id="userDao" parent="baseDao" />    <bean id="userService" ref="userDao" />    </bean></beans>

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spring-mvc.xml

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<?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>

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web.xml

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<?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>

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实体层代码：

User.java

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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;    }}

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UserMapper.xml

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<?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>

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Dao层代码：

BaseDao.java

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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);}

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BaseDaoImpl.java

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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;    }}

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UserDao.java

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

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UserDaoImpl.java

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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 {}

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Service层代码：

UserService.java

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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);}

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UserServiceImpl.java

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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;    }    }

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Controller层代码：

UserController.java

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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);    }}

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常量类：

Constants.java

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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";}

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工具类：

StringUtil.java

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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;    }}

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还有一个用于包装JSON的类：

Message.java

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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;    }}

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