搭建基于Spring+MyBatis+Jersey的Maven-Web系统

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搭建基于Spring+MyBatis+Jersey的Maven-Web系统
版本: Spring(4.1.0.RELEASE) + MyBatis(3.2.7)+ Jersey(1.18.1)
工具: IntelliJ + Maven

详细步骤如下：
创建一个基于maven-archetype-webapp的项目
打开pom文件，添加spring,jersey,jersey-spring依赖的库

 <properties>        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>        <spring.version>4.1.0.RELEASE</spring.version>        <jersey.version>1.18.1</jersey.version>    </properties>    <dependencies>        <!--Jersey dependencies -->        <dependency>            <groupId>com.sun.jersey</groupId>            <artifactId>jersey-server</artifactId>            <version>${jersey.version}</version>        </dependency>        <dependency>            <groupId>com.sun.jersey</groupId>            <artifactId>jersey-client</artifactId>            <version>${jersey.version}</version>        </dependency>        <!-- Spring dependencies -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-core</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-web</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-jdbc</artifactId>            <version>${spring.version}</version>        </dependency>        <dependency>            <groupId>com.sun.jersey.contribs</groupId>            <artifactId>jersey-spring</artifactId>            <version>${jersey.version}</version>            <!-- 去除自带的spring版本 -->            <exclusions>                <exclusion>                    <groupId>org.springframework</groupId>                    <artifactId>spring-aop</artifactId>                </exclusion>                <exclusion>                    <groupId>org.springframework</groupId>                    <artifactId>spring-context</artifactId>                </exclusion>                <exclusion>                    <groupId>org.springframework</groupId>                    <artifactId>spring-beans</artifactId>                </exclusion>                <exclusion>                    <groupId>org.springframework</groupId>                    <artifactId>spring-core</artifactId>                </exclusion>                <exclusion>                    <artifactId>spring-web</artifactId>                    <groupId>org.springframework</groupId>                </exclusion>            </exclusions>        </dependency>    </dependencies>

创建文件:src/main/java/applicationContex.xml，添加如下代码即可(根据情况修改包路径)

 <context:component-scan base-package="com.steven.study"/>

6.web.xml配置如下:
如果项目中没有web.xml文件,右击项目->Add Framework Support->勾选Web Application->OK即可

    <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>    <servlet>        <servlet-name>JerseyServlet</servlet-name>        <servlet-class>            com.sun.jersey.spi.spring.container.servlet.SpringServlet        </servlet-class>        <init-param>            <param-name>                com.sun.jersey.config.property.packages            </param-name>            <param-value>com.steven.study.rest</param-value>        </init-param>        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>JerseyServlet</servlet-name>        <url-pattern>/rest/*</url-pattern>    </servlet-mapping>

7.添加Rest类

 @Component        @Path("user")    public class UserRest {        @GET        @Path("/test")        @Produces(MediaType.TEXT_PLAIN)        public String userTest() {            return "OK";        }    }

8.访问：http://localhost:8080/项目名称/rest/user/test
如果返回OK，则表示Rest环境已经run起来了！

9.继续…
打开pom文件添加 1)MyBatis依赖 2)dbcp依赖(后面会配置连接池) 3)MySql数据库连接jar

    <dependency>        <groupId>commons-dbcp</groupId>        <artifactId>commons-dbcp</artifactId>    <version>1.4</version>    </dependency>    <dependency>        <groupId>org.mybatis</groupId>        <artifactId>mybatis-spring</artifactId>        <version>1.2.2</version>     </dependency>     <dependency>         <groupId>org.mybatis</groupId>         <artifactId>mybatis</artifactId>         <version>3.2.7</version>     </dependency>     <dependency>         <groupId>mysql</groupId>         <artifactId>mysql-connector-java</artifactId>         <version>5.1.32</version>     </dependency>

applicationContex.xml添加连接池配置、mybatisSqlSessionFactoryBean、SqlSessionTemplate等配置

    <!-- 配置数据源 -->    <bean id="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/mydb"/>        <property name="username" value="root"/>        <property name="password" value="123456"/>        <!--连接池启动时的初始值 -->        <property name="initialSize" value="10"/>        <!--连接池的最大值 -->        <property name="maxActive" value="100"/>        <!--最大空闲值.当经过一个高峰时间后，连接池可以慢慢将已经用不到的连接慢慢释放一部        分，一直减少到maxIdle为止 -->        <property name="maxIdle" value="50"/>        <!--最小空闲值.当空闲的连接数少于阀值时，连接池就会预申请去一些连接，以免洪峰来时        来不及申请 -->        <property name="minIdle" value="10"/>        <!--给出一条简单的sql语句进行验证 -->        <property name="validationQuery" value="select 1 from dual"/>        <!--在取出连接时进行有效验证 -->        <property name="testOnBorrow" value="true"/>        <property name="removeAbandonedTimeout" value="120"/>        <property name="removeAbandoned" value="true"/>        <!--#运行判断连接超时任务的时间间隔，单位为毫秒，默认为-1，即不执行任务.-->        <property name="timeBetweenEvictionRunsMillis" value="3600000"/>        <!--#连接的超时时间，默认为半小时。 -->        <property name="minEvictableIdleTimeMillis" value="3600000"/>    </bean>    <!-- 配置mybatisSqlSessionFactoryBean -->    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <property name="dataSource" ref="dataSource" />        <property name="typeAliasesPackage" value="com.steven.study.entity" />    </bean>    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <property name="basePackage" value="com.steven.study.mapper" />    </bean>    <!-- 配置SqlSessionTemplate -->    <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate" scope="pr    ototype">        <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory" />    </bean>    <!-- 事务配置 -->    <bean id="transactionManager"          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <property name="dataSource" ref="dataSource" />    </bean>    <!-- 使用annotation注解方式配置事务 -->    <!--<tx:annotation-driven transaction-manager="transactionManager" />-->    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">        <property name="dataSource">            <ref bean="dataSource" />        </property>    </bean>

11.MySQL数据库中创建一张简单的用户表

    CREATE TABLE `tb_user` (      `USERID` int(10) unsigned zerofill NOT NULL AUTO_INCREMENT COMMENT '用户编码',      `USERNAME` varchar(50) NOT NULL COMMENT '用户名',      `PASSWORD` varchar(50) NOT NULL COMMENT '密码',      `AGE` int(10) NOT NULL COMMENT '年龄',      `DELETEFLAG` varchar(1) NOT NULL DEFAULT '0' COMMENT '删除标识',      PRIMARY KEY (`USERID`),      KEY `列 1` (`USERID`)    ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8 COMMENT='用户表';

添加MyBatis相关的UserMapper和UserMapper.xml
public interface UserMapper {
//Create a new user
int addUser();
}

(TB_USER表的主键我设置为Auto Increment,所以这里没有插入该字段) 13.添加service接口

public interface UserService {
public int addUser();
}

14.添加service接口实现类

@Service    public class UserServiceImpl implements UserService {    @Autowired    UserMapper userMapper;    @Override    public int addUser() {        return userMapper.addUser();    }}

 15.UserRest类中添加测试方法

@GET@Path("/add")@Produces(MediaType.TEXT_PLAIN)public String addUser() {    int result = userService.addUser();    System.out.println("Create user result = " + result);    return result==1?"OK":"ERROR";}

“`

(UserRest中别忘记了注入service)
16. 测试一下！

总结: 可能会出现的问题:
1. jar包冲突
2. 接口没有添加@Component注解
3. service实现类没有添加@Service注解
4. xxxmapper.xml中的namespace没对应到xxxmapper.java
5. 有时候pom.xml文件加入了依赖但是仍然提示找不到类，可以手动Maven->Reimport
6.
搭建环境的时候还碰到了其它一些问题，想不起来了，先到这吧。

http://stevenote.blog.51cto.com/656609/1559598

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