SSM框架整合(實現從數據庫到頁面展示)
阿新 • • 發佈：2018-04-08
patch beans response 由於 spring容器 void 不用 html show
SSM框架整合(實現從數據庫到頁面展示)
首先創建一個spring-web項目，然後需要配置環境dtd文件的引入，環境配置，jar包引入。
首先讓我來看一下ssm的基本項目配件。(代碼實現)
1.首先編寫web.xml文件。
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1"> <display-name>ssmdemo</display-name> <!-- 創建spring容器:為了查找spring容器要管理的所有bean --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/application*.xml</param-value> </context-param> <!-- g該類在web.jar的context包下的ContextLoaderListener,該類實現了監聽器接口 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 創建前端控制器 --> <servlet> <servlet-name>ssm</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/spring-mvc.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>ssm</servlet-name> <url-pattern>*.action</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.html</welcome-file> </welcome-file-list> </web-app>
2.建mybatis-config.xml和spring-mvc.xml文建的配置。
1.myatis-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "http://mybatis.org/dtd/mybatis-3-config.dtd" "mybatis-3-config.dtd" >
<configuration>
<typeAliases>
<package name="com.bean.*" />
</typeAliases>
</configuration>
2.spring-mvc.xml(使用註解掃描@Controller,@ResquestMapping(“指定路徑”))
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd "> <!-- 開啟註解掃描 --> <context:component-scan base-package="com.controller,com.service.impl" /> <!-- 開啟處理器 --> <mvc:annotation-driven /> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/pages/"></property> <property name="suffix" value=".jsp"></property> </bean> </beans>
3.application-dao.xml,application-tx,application-service配置
1）application-dao.xml和IUsersDao.xml的配置以及IUsersDao.java類的實現。
1.application-dao.xml:IUsersDao.java的配置（數據庫查詢數據）
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd "> <!-- 配置數據源 c3p0數據庫連接池。到對應的連接池jar中找 --> <context:property-placeholder location="classpath:db.properties" /> <bean id="ds" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="DriverClass" value="${Adirver}"></property> <property name="JdbcUrl" value="${Aurl}"></property> <property name="User" value="${Ausername}"></property> <property name="Password" value="${Apassword}"></property> </bean> <!-- factory：mybatis-spring整合包中找。 --> <bean id="factory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="configLocation" value="classpath:mybatis/mybatis-config.xml"></property> <property name="dataSource" ref="ds"></property> </bean> <!-- 批量創建dao代理類對象：符合mybatis的mapper代理方式規範 -->
2.IUsersDao.java類
package com.dao; import java.util.List; import com.bean.UsersBean; public interface IUsersDao { /** * 過去所有用戶 * @return */ public List<UsersBean> getAllUser(); }
3.IUsersDao.xml:Mapper映射。
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "http://mybatis.org/dtd/mybatis-3-mapper.dtd" "mybatis-3-mapper.dtd" >
<mapper namespace="com.dao.IUsersDao">
<select id="getAllUser" resultType="com.bean.UsersBean">
select * from users
</select>
</mapper>
2）application-service.xml和UsersService.java
1.application-service.xml：業務層的xml配置，創建bean是IUsersBean與UsersService關聯。
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd "> <bean id="usersService" class="com.service.impl.UsersServiceImpl" /> </beans>
2.UsersSerivce.java類
package com.service.impl; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import com.bean.UsersBean; import com.dao.IUsersDao; import com.service.IUsersService; public class UsersServiceImpl implements IUsersService { @Autowired private IUsersDao userDao; @Override public List<UsersBean> findAllUser() { // TODO Auto-generated method stub return userDao.getAllUser(); } }
3)application-tr.xml配置
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd "> <!-- 事務配置管理器 :jdbc->jdbc.datasource --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="ds"></property> </bean> <!-- 增強，通知 --> <tx:advice id="advice" transaction-manager="transactionManager"> <tx:attributes> <!-- 此處規定開發的方法前綴規範： --> <!-- 增刪 改的方法REQUIRED(required) --> <!-- 查詢所有方法是SUPPORTS,read-only --> <tx:method name="add*" propagation="REQUIRED" /> <tx:method name="delete*" propagation="REQUIRED" /> <tx:method name="update*" propagation="REQUIRED" /> <tx:method name="find*" propagation="SUPPORTS" read-only="true" /> <tx:method name="get*" propagation="SUPPORTS" read-only="true" /> </tx:attributes> </tx:advice> <!-- 定義aop --> <aop:config> <aop:pointcut expression="execution(* com.service.impl.*.*(..))" id="pcut" /> <aop:advisor advice-ref="advice" pointcut-ref="pcut" /> </aop:config> </beans>
4.Controller類的配置（註解配置）
1.返回路徑相當於地址欄。
package com.controller; import java.util.List; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; import com.bean.UsersBean; import com.service.IUsersService; /** * Handler * * @author Ya * */ @Controller public class UsersController { @Resource(name = "usersService") private IUsersService usersService; /** * 返回相等路徑 * * @param request * @return * @throws Exception */ @RequestMapping("/showAll") public String showAll(Model model) { // 調用業務方法 List<UsersBean> list = usersService.findAllUser(); // 將list返回 model.addAttribute("USER", list); // 跳轉到pages/users/showUsers.jsp頁面，轉發或者重定向 // return "forward:pages/users/showUsers.jsp"; return "users/showUsers"; } }
2.返回 累行為ModelAndView
package com.controller; import java.util.List; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; import com.bean.UsersBean; import com.service.IUsersService; /** * Handler * * @author Ya * */ @Controller public class UsersController { @Resource(name = "usersService") private IUsersService usersService; /** * ModelAndView * * @return */ @RequestMapping("/showAll") public ModelAndView showAll() { // 獲取業務的查詢結果 List<UsersBean> list = usersService.findAllUser(); // 將查詢的結果集合顯示到pages/showUsers.jsp ModelAndView m = new ModelAndView(); // 存儲list m.addObject("USER", list); // 指定試圖資源： // 由於spring-mvc.xml文件中配置了試圖解析器的前綴和後綴 m.setViewName("users/showUsers"); return m; } }
3.返回forward轉發
package com.controller; import java.util.List; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; import com.bean.UsersBean; import com.service.IUsersService; /** * Handler * * @author Ya * */ @Controller public class UsersController { @Resource(name = "usersService") private IUsersService usersService; /** * 轉發 * * @param request * @param response * @throws Exception */ @RequestMapping("/showAll") public void showAll(HttpServletRequest request, HttpServletResponse response) throws Exception { // 調用業務方法 List<UsersBean> list = usersService.findAllUser(); // 將list返回 request.setAttribute("USER", list); // 跳轉到pages/users/showUsers.jsp頁面，轉發或者重定向 // request.getRequestDispatcher("pages/users/showUsers.jsp").forward(request, // response); response.sendRedirect("pages/users/showUsers.jsp"); }
4.返回為重定向。
package com.controller; import java.util.List; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; import com.bean.UsersBean; import com.service.IUsersService; /** * Handler * * @author Ya * */ @Controller public class UsersController { @Resource(name = "usersService") private IUsersService usersService; /** * 重定向 * * @param request * @param response * @throws Exception */ @RequestMapping("/showAll") public void showAll1(HttpServletRequest request, HttpServletResponse response) throws Exception { // 調用業務方法 List<UsersBean> list = usersService.findAllUser(); // 將list返回 HttpSession session = request.getSession(); session.setAttribute("USER", list); // 跳轉到pages/users/showUsers.jsp頁面，轉發或者重定向 response.sendRedirect("pages/users/showUsers.jsp"); }
5.直接return “redirect:pages/users/showUsers.jsp”
package com.controller; import java.util.List; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; import com.bean.UsersBean; import com.service.IUsersService; /** * Handler * * @author Ya * */ @Controller public class UsersController { @Resource(name = "usersService") private IUsersService usersService; /** * 返回值為String * * @param request * @param response * @return * @throws Exception */ @RequestMapping("/showAll") public String showAll(HttpServletRequest request) throws Exception { // 調用業務方法 List<UsersBean> list = usersService.findAllUser(); // 將list返回 HttpSession session=request.getSession(); session.setAttribute("USER", list); // 跳轉到pages/users/showUsers.jsp頁面，轉發或者重定向 return "forward:pages/users/showUsers.jsp"; // return "redirect:pages/users/showUsers.jsp"; }
7.直接return“forward:pages/users/showUsers.jsp”；
package com.controller; import java.util.List; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; import com.bean.UsersBean; import com.service.IUsersService; /** * Handler * * @author Ya * */ @Controller public class UsersController { @Resource(name = "usersService") private IUsersService usersService; /** * 返回值為String * * @param request * @param response * @return * @throws Exception */ @RequestMapping("/showAll") public String showAll(HttpServletRequest request) throws Exception { // 調用業務方法 List<UsersBean> list = usersService.findAllUser(); // 將list返回 request.setAttribute("USER", list); // 跳轉到pages/users/showUsers.jsp頁面，轉發或者重定向 return "forward:pages/users/showUsers.jsp"; }
以上隨便一種方式都是可以的。
總結：
1.我們主要是學習了ssm整合，把數據庫的數據的數據展示到網頁中。主要分為
dao-->service-->controller-->jsp
2.
1）dao主要是輔助取出數據庫的數據，dao到daoMapper批量映射。獲取數據，鏈接數據庫是又application-dao.xml文件來集成配置管理。
2）service 為業務層，由application-service.xml文件管理。主要是配置IUsersDao，使service中不用newIUsersDao。
3）controller主要是將業務層取來數據傳遞到jsp頁面中，然後將數據攜帶到要跳轉的jsp頁面中。
4）jsp接受並展示數據controller中傳遞來的參數。
3.spring中的application*.xml和spring-mvc.xml的xml文件在WEB-INF/web.xml中進行解析；
mybatis中的mybatis-config.xml中的xml文件在application-dao.xml文件中被解析。
有問題請留言！！
SSM框架整合(實現從數據庫到頁面展示)