搭建基于Spring+MyBatis+Jersey的Maven-Web系統
版本: Spring(4.1.0.RELEASE) + MyBatis(3.2.7)+ Jersey(1.18.1)
工具: IntelliJ + Maven
詳細步驟如下:
- 建立一個基于maven-archetype-webapp的項目
- 打開pom檔案,添加spring,jersey,jersey-spring依賴的庫
<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>
<!-- 去除自帶的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. 建立檔案:src/main/java/applicationContex.xml,添加如下代碼即可(根據情況修改包路徑)
<context:component-scan base-package="com.steven.study"/>
6. web.xml配置如下:
如果項目中沒有web.xml檔案,右擊項目->Add Framework Support->勾選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類
@Component
@Path("user")
public class UserRest {
@GET
@Path("/test")
@Produces(MediaType.TEXT_PLAIN)
public String userTest() {
return "OK";
}
}
8. 通路:http://localhost:8080/項目名稱/rest/user/test
如果傳回OK,則表示Rest環境已經run起來了!
9. 繼續...
打開pom檔案添加 1)MyBatis依賴 2)dbcp依賴(後面會配置連接配接池) 3)MySql資料庫連接配接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添加連接配接池配置、mybatisSqlSessionFactoryBean、SqlSessionTemplate等配置
<!-- 配置資料源 -->
<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"/>
<!--連接配接池啟動時的初始值 -->
<property name="initialSize" value="10"/>
<!--連接配接池的最大值 -->
<property name="maxActive" value="100"/>
<!--最大空閑值.當經過一個高峰時間後,連接配接池可以慢慢将已經用不到的連接配接慢慢釋放一部 分,一直減少到maxIdle為止 -->
<property name="maxIdle" value="50"/>
<!--最小空閑值.當空閑的連接配接數少于閥值時,連接配接池就會預申請去一些連接配接,以免洪峰來時 來不及申請 -->
<property name="minIdle" value="10"/>
<!--給出一條簡單的sql語句進行驗證 -->
<property name="validationQuery" value="select 1 from dual"/>
<!--在取出連接配接時進行有效驗證 -->
<property name="testOnBorrow" value="true"/>
<property name="removeAbandonedTimeout" value="120"/>
<property name="removeAbandoned" value="true"/>
<!--#運作判斷連接配接逾時任務的時間間隔,機關為毫秒,預設為-1,即不執行任務.-->
<property name="timeBetweenEvictionRunsMillis" value="3600000"/>
<!--#連接配接的逾時時間,預設為半小時。 -->
<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>
<!-- 事務配置 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 使用annotation注解方式配置事務 -->
<!--<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資料庫中建立一張簡單的使用者表
CREATE TABLE `tb_user` (
`USERID` int(10) unsigned zerofill NOT NULL AUTO_INCREMENT COMMENT '使用者編碼',
`USERNAME` varchar(50) NOT NULL COMMENT '使用者名',
`PASSWORD` varchar(50) NOT NULL COMMENT '密碼',
`AGE` int(10) NOT NULL COMMENT '年齡',
`DELETEFLAG` varchar(1) NOT NULL DEFAULT '0' COMMENT '删除辨別',
PRIMARY KEY (`USERID`),
KEY `列 1` (`USERID`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8 COMMENT='使用者表';
12. 添加MyBatis相關的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表的主鍵我設定為Auto Increment,是以這裡沒有插入該字段)
13. 添加service接口
public interface UserService {
public int addUser();
}
14. 添加service接口實作類
@Service
public class UserServiceImpl implements UserService {
@Autowired
UserMapper userMapper;
@Override
public int addUser() {
return userMapper.addUser();
}
}
15. UserRest類中添加測試方法
@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中别忘記了注入service)
16. 測試一下!
總結: 可能會出現的問題:
1. jar包沖突
2. 接口沒有添加@Component注解
3. service實作類沒有添加@Service注解
4. xxxmapper.xml中的namespace沒對應到xxxmapper.java
5. 有時候pom.xml檔案加入了依賴但是仍然提示找不到類,可以手動Maven->Reimport
6.
搭建環境的時候還碰到了其它一些問題,想不起來了,先到這吧。
轉載于:https://blog.51cto.com/stevenote/1559598