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搭建基于Spring+MyBatis+Jersey的Maven-Web系统


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:

  1. 创建一个基于maven-archetype-webapp的项目

  2. 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>

5.  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>

10. 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="http://www.mamicode.com/com.mysql.jdbc.Driver"/>
        <property name="url" value="http://www.mamicode.com/jdbc:mysql://localhost:3306/mydb"/>
        <property name="username" value="http://www.mamicode.com/root"/>
        <property name="password" value="http://www.mamicode.com/123456"/>
        <!--连接池启动时的初始值 -->
        <property name="initialSize" value="http://www.mamicode.com/10"/>
        <!--连接池的最大值 -->
        <property name="maxActive" value="http://www.mamicode.com/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="http://www.mamicode.com/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="http://www.mamicode.com/10"/>
        <!--给出一条简单的sql语句进行验证 -->
        <property name="validationQuery" value="http://www.mamicode.com/select 1 from dual"/>
        <!--在取出连接时进行有效验证 -->
        <property name="testOnBorrow" value="http://www.mamicode.com/true"/>
        <property name="removeAbandonedTimeout" value="http://www.mamicode.com/120"/>
        <property name="removeAbandoned" value="http://www.mamicode.com/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="http://www.mamicode.com/3600000"/>
        <!--#连接的超时时间,默认为半小时。 -->
        <property name="minEvictableIdleTimeMillis" value="http://www.mamicode.com/3600000"/>
    </bean>
    <!-- 配置mybatisSqlSessionFactoryBean -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="typeAliasesPackage" value="http://www.mamicode.com/com.steven.study.entity" />
    </bean>
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="http://www.mamicode.com/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‘;

12. 添加MyBatis相关的UserMapper和UserMapper.xml

    public interface UserMapper {
        //Create a new user
        int addUser();
    }
    <?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dt    d/mybatis-3-mapper.dtd" >
        <mapper namespace="com.steven.study.mapper.UserMapper">
        <!-- Create a new User -->
        <insert id="addUser">
            INSERT INTO TB_USER(USERNAME,PASSWORD,AGE,DELETEFLAG) VALUES("Hello","11111            1",10,0)
        </insert>
    </mapper>

(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。


搭建基于Spring+MyBatis+Jersey的Maven-Web系统