SSM輕鬆寫出Restful風格介面
1.新建web專案
src下新建包com.company
二 . 匯入jar包
aopalliance-1.0、aspectjweaver-1.7.4、commons-dbcp2-2.1.1、druid-0.2.19、fastjson-1.2.32、jackson-annotations-2.9.1、jackson-core-2.9.1、jackson-databind-2.9.1、javaee-api-7.0、mybatis-3.3.0、ojdbc6、slf4j-api-1.8.0-beta0、slf4j-log4j12-1.8.0-beta0、spring-aop-4.3.12.RELEASE、spring-beans-4.3.12.RELEASE、spring-context-4.3.12.RELEASE、spring-context-support-4.3.12.RELEASE、spring-core-4.3.12.RELEASE、spring-expression-4.3.12.RELEASE、spring-jdbc-4.3.12.RELEASE、spring-oxm-4.3.12.RELEASE、spring-tx-4.3.12.RELEASE、spring-web-4.3.12.RELEASE、spring-webmvc-4.3.12.RELEASE。
從
三 . src下新建log4j.properties檔案
log4j.rootLogger=DEBUG,Console,File
#定義日誌輸出目的地為控制檯
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.Target=System.out
#可以靈活地指定日誌輸出格式,下面一行是指定具體的格式
log4j.appender.Console.layout = org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n
#檔案大小到達指定尺寸的時候產生一個新的檔案
log4j.appender.File = org.apache.log4j.RollingFileAppender
#指定輸出目錄
log4j.appender.File.File = ssm.log
#定義檔案最大大小
log4j.appender.File.MaxFileSize = 10MB
# 輸出所以日誌,如果換成DEBUG表示輸出DEBUG以上級別日誌
log4j.appender.File.Threshold = ALL
log4j.appender.File.layout = org.apache.log4j.PatternLayout
log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH\:mm\:ss}][%c]%m%n
四. src下新建ssm.log
五. src下新建資料庫配置檔案jdbc.propertis
driver=oracle.jdbc.OracleDriver
url=jdbc:oracle:thin:@XXX
username=test
password=psw
#定義初始連線數
initialSize=0
#定義最大連線數
maxActive=20
#定義最大空閒
maxIdle=20
#定義最小空閒
minIdle=1
#定義最長等待時間
maxWait=60000
六. src下新建spring-mybatis.xml,顧名思義,即配置資料庫和spring(含xml對映資訊和對映檔案對應的dao介面)
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd">
<!-- 配置資料來源 ,使用的alibba的資料庫-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<!-- 基本屬性 url、user、password -->
<property name="driverClassName" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
<!-- 配置初始化大小、最小、最大 -->
<property name="initialSize" value="10"/>
<property name="minIdle" value="10"/>
<property name="maxActive" value="50"/>
<!-- 配置獲取連線等待超時的時間 -->
<property name="maxWait" value="60000"/>
<!-- 配置間隔多久才進行一次檢測,檢測需要關閉的空閒連線,單位是毫秒 -->
<property name="timeBetweenEvictionRunsMillis" value="60000" />
<!-- 配置一個連線在池中最小生存的時間,單位是毫秒 -->
<property name="minEvictableIdleTimeMillis" value="300000" />
<!-- 開啟PSCache,並且指定每個連線上PSCache的大小 如果用Oracle,則把poolPreparedStatements配置為true,mysql可以配置為false。-->
<property name="poolPreparedStatements" value="false" />
<property name="maxPoolPreparedStatementPerConnectionSize" value="20" />
<!-- 配置監控統計攔截的filters -->
<property name="filters" value="wall,stat" />
</bean>
<!-- 配置mybatis的對映檔案 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 自動掃描mapping.xml檔案 -->
<property name="mapperLocations" value="classpath*:com/company/mapping/*.xml"></property>
</bean>
<!-- DAO介面所在包名,Spring會自動查詢其下的類 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.company.dao" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>
<!-- (事務管理)transaction manager, use JtaTransactionManager for global tx -->
<!-- 配置事務管理器 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!--======= 事務配置 End =================== -->
<!-- 配置基於註解的宣告式事務 -->
<!-- enables scanning for @Transactional annotations -->
<tx:annotation-driven transaction-manager="transactionManager" />
</beans>
七. src下新建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:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
">
<!-- 1.配置jdbc檔案 -->
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations" value="classpath*:jdbc.propertis"/>
</bean>
<import resource="classpath*:spring-mybatis.xml" />
</beans>
八. com.company.pojo下新建類User
public class User {
public String user_id;
public String user_name;
}
九.com.company.dao下新建 對映檔案對應的UserMapper介面
public interface UserMapper {
public User findByUserId(String userId);
}
十.com.company.mapping下新建對映檔案UserMapping.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">
<!--這塊等於dao介面的實現 com.company.dao.UserMapper即為對映的介面-->
<mapper namespace="com.company.dao.UserMapper">
<!-- findByUserId必須和介面中的方法名一樣 返回一個User就是剛才的別名-->
<select id="findByUserId" parameterType="String" resultType="com.company.pojo.User">
select * from emp_data where user_id=#{userId}
</select>
</mapper>
ps:第九、十步com.company.dao和com.company.mapping已經在第六步spring-mybatis.xml進行過配置,是不是很方便?
十一.在com.company.service下新建Spring介面類IUserService
public interface IUserService {
public User getUserById(String userId);
}
十二. 在com.company.service.impl新建上一步介面的實現類
@Service("userService")
public class UserServiceImpl implements IUserService{
@Resource
private UserMapper userDao;
@Override
public User getUserById(String userId) {
return userDao.findByUserId(userId);
}
}
十三.下面就可以寫控制器了,在com.company.controller下新建控制類UserCtr
@Controller
@RequestMapping(value = "user/")
public class UserCtr {
@Autowired
private IUserService userService;
@RequestMapping(value = "queryUserById/{userId}", method = RequestMethod.GET,produces={"application/json;charset=UTF-8"})
@ResponseBody
public User queryUserById(@PathVariable("userId") String userId) {
User user = userService.getUserById(userId);
return user;
}
}
十四. 控制器掃描注入,在src下新建spring-mvc.xml檔案
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:util="http://www.springframework.org/schema/util"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-2.5.xsd">
<!-- 掃描controller -->
<context:component-scan base-package="com.company.controller" use-default-filters="false">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!-- 掃描實現類 -->
<context:component-scan base-package="com.company.service.impl" />
<mvc:annotation-driven />
<!-- 內容協商管理器 -->
<!--1、首先檢查路徑副檔名(如my.pdf);2、其次檢查Parameter(如my?format=pdf);3、檢查Accept Header-->
<bean id="contentNegotiationManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean">
<!-- 副檔名至mimeType的對映,即 /user.json => application/json -->
<property name="favorPathExtension" value="true"/>
<!-- 用於開啟 /userinfo/123?format=json 的支援 -->
<property name="favorParameter" value="true"/>
<property name="parameterName" value="format"/>
<!-- 是否忽略Accept Header -->
<property name="ignoreAcceptHeader" value="false"/>
<property name="mediaTypes"> <!--副檔名到MIME的對映;favorPathExtension, favorParameter是true時起作用 -->
<value>
json=application/json
xml=application/xml
html=text/html
</value>
</property>
<!-- 預設的content type -->
<property name="defaultContentType" value="text/html"/>
</bean>
<bean
class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter ">
<property name="messageConverters">
<util:list id="beanList">
<ref bean="mappingJacksonHttpMessageConverter" />
</util:list>
</property>
</bean>
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8</value>
</list>
</property>
</bean>
<!-- 當在web.xml 中 DispatcherServlet使用 <url-pattern>/</url-pattern> 對映時,能對映靜態資源 -->
<mvc:default-servlet-handler />
<!-- 靜態資源對映 -->
<mvc:resources mapping="/static/**" location="/WEB-INF/static/"/>
<!-- 對模型檢視新增前後綴 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/" p:suffix=".jsp"/>
</beans>
十五. 在web.xml中引入spring-mvc.xml和applicationContext.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"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>springMVC</display-name>
<!-- 該servlet為tomcat,jetty等容器提供,將靜態資源對映從/改為/static/目錄,如原來訪問 http://localhost/foo.css ,現在http://localhost/static/foo.css -->
<!-- 不攔截靜態檔案 -->
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>/js/*</url-pattern>
<url-pattern>/css/*</url-pattern>
<url-pattern>/images/*</url-pattern>
<url-pattern>/fonts/*</url-pattern>
</servlet-mapping>
<!-- Spring和mybatis的配置檔案 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:applicationContext.xml</param-value>
</context-param>
<!-- 編碼過濾器 -->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<async-supported>true</async-supported>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 新增日誌監聽器 -->
<context-param>
<param-name>logbackConfigLocation</param-name>
<param-value>classpath*:logback.xml</param-value>
</context-param>
<!-- Spring監聽器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 防止Spring記憶體溢位監聽器 -->
<listener>
<listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
</listener>
<!-- Spring MVC servlet核心配置 -->
<servlet>
<servlet-name>dispatcherServlet</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>
<async-supported>true</async-supported>
</servlet>
<servlet>
<servlet-name>DruidStatView</servlet-name>
<servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>DruidStatView</servlet-name>
<url-pattern>/druid/*</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>