spring集成web环境
作者:互联网
1、maven工程导入依赖
除了导入常规依赖外,web项目还需要导入如下依赖
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.3.5</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
2、配置web.xml各个标签
配置全局参数,监听器,servlet映射。
监听器内部加载spring配置文件,创建应用上下文并存储到ServletContext(工程内servlet共享的一块内存)域中,在Web项目启动时,容器会读取listener和contex-param标签的配置。
<web-app>
<display-name>Archetype Created Web Application</display-name>
<!-- 加载全局初始化参数 -->
<context-param>
<!-- 配置需要加载的配置文件为ApplicationContext.xml -->
<param-name>contextConfigLocation</param-name>
<param-value>classpath:ApplicationContext.xml</param-value>
</context-param>
<!-- 配置监听器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 配置servlet映射 -->
<servlet>
<servlet-name>userServlet</servlet-name>
<servlet-class>com.syx.controller.StudentController</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>userServlet</servlet-name>
<url-pattern>/test1</url-pattern>
</servlet-mapping>
</web-app>
3、编写web类
继承HttpServlet并重写其方法(doGet…等)
使用WebApplicationContextUtils工具类中的getWebApplicationContext获取配置文件上下文对象
public class StudentController extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//super.doGet是重写doGet方法时自动生成的调用父类方法的语句,这里没用,直接删掉就行了
//super.doGet(req, resp);
// 获取servlet上下文
ServletContext context = req.getServletContext();
//获取配置文件上下文,这里获取的配置文件是web.xml中配置的contextConfigLocation对应的文件
WebApplicationContext applicationContext = WebApplicationContextUtils.getWebApplicationContext(context);
//获取javaBean
studentService studentService = (studentService) applicationContext.getBean("studentServiceId");
//调用对象的方法
studentService.printSuccess();
}
}
标签:集成,web,配置文件,spring,doGet,studentService,servlet,javax 来源: https://blog.csdn.net/qq_36929123/article/details/115445967