【SSM整合】2—Spring和SpringMVC整合
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Github主页👉https://github.com/A-BigTree
笔记链接👉https://github.com/A-BigTree/Code_Learning
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Spring专栏👉https://blog.csdn.net/weixin_53580595/category_12279588.html
SpringMVC专栏👉https://blog.csdn.net/weixin_53580595/category_12281721.html
Mybatis专栏👉https://blog.csdn.net/weixin_53580595/category_12279566.html
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文章目录
2 Spring和SpringMVC整合
2.1 配置web.xml
<!-- ContextLoaderListener -->
<!-- 通过 context-param 指定 Spring 框架的配置文件位置 -->
<context-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring-persist.xml</param-value>
</context-param><!-- 配置 ContextLoaderListener -->
<listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener><!-- DispatcherServlet -->
<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>
</servlet>
<servlet-mapping><servlet-name>dispatcherServlet</servlet-name><url-pattern>/</url-pattern>
</servlet-mapping><!-- 需要注意两个 Filter 的顺序：字符集过绿器在前，转换请求方式过绿器在后 -->
<!-- CharacterEncodingFilter -->
<filter><filter-name>characterEncodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param><init-param><param-name>forceRequestEncoding</param-name><param-value>true</param-value></init-param><init-param><param-name>forceResponseEncoding</param-name><param-value>true</param-value></init-param>
</filter>
<filter-mapping><filter-name>characterEncodingFilter</filter-name><url-pattern>/*</url-pattern>
</filter-mapping><!-- HiddenHttpMethodFilter -->
<filter><filter-name>hiddenHttpMethodFilter</filter-name><filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>
<filter-mapping><filter-name>hiddenHttpMethodFilter</filter-name><url-pattern>/*</url-pattern>
</filter-mapping>
2.2 配置SpringMVC
<!-- SpringMVC 只sao描 handler 类所在的包 -->
<!-- Spring 和 SpringMVC sao描各自负责的组件，sao描的范围没有重合的部分，直接避免了重复创建对象 -->
<context:component-scan base-package="com.atguigu.ssm.handler"/><!-- 配置 Thymeleaf 的视图解析器 -->
<bean id="thymeleafViewResolver" class="org.thymeleaf.spring5.view.ThymeleafViewResolver"><property name="order" value="1"/><property name="characterEncoding" value="UTF-8"/><property name="templateEngine"><bean class="org.thymeleaf.spring5.SpringTemplateEngine"><property name="templateResolver"><bean class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver"><property name="prefix" value="/WEB-INF/templates/"/><property name="suffix" value=".html"/><property name="characterEncoding" value="UTF-8"/><property name="templateMode" value="HTML5"/></bean></property></bean></property>
</bean><!-- SpringMVC 注解驱动（标配） -->
<mvc:annotation-driven/><!-- 对于没有映射的请求直接转发放行，主要是静态资源 -->
<mvc:default-servlet-handler/><!-- 匹配请求路径直接前往视图，不经过 handler 方法 -->
<mvc:view-controller path="/" view-name="portal"/>
<mvc:view-controller path="/index.html" view-name="portal"/>
2.3 显示数据列表
2.3.1 显示首页
声明view-controller
<!-- 匹配请求路径直接前往视图，不经过 handler 方法 -->
<mvc:view-controller path="/" view-name="portal"/>
<mvc:view-controller path="/index.html" view-name="portal"/>
创建页面
<!DOCTYPE html>
<html lang="en" xml:th="http://www.thymeleaf.org">
<head><meta charset="UTF-8"><title>Title</title>
</head>
<body><a th:href="@{/get/all}">显示全部数据</a>
</body>
</html>
2.3.2 显示数据列表
创建处理类
@Controller
public class EmpHandler {@Autowiredprivate EmpService empService;@RequestMapping("/get/all")public String getAll(Model model) {// 1、查询数据List<Emp> empList = empService.getAll();// 2.存入模型model.addAttribute("empList", empList);return "emp-list";}}
页面显示
<table><tr><th>ID</th><th>NAME</th><th>SALARY</th></tr><tbody th:if="${#lists.isEmpty(empList)}"><tr><td colspan="3">抱歉！没有查询到数据！</td></tr></tbody><tbody th:if="${not #lists.isEmpty(empList)}"><tr th:each="emp : ${empList}"><td th:text="${emp.empId}">这里显示员工ID</td><td th:text="${emp.empName}">这里显示员工NAME</td><td th:text="${emp.empSalary}">这里显示员工SALARY</td></tr></tbody>
</table><a th:href="@{/}">回首页</a>
