Spring与Mybatis整合(二)

朴灿烈づ我的快乐病毒、 2023-10-17 18:11 38阅读 0赞

**一.Web.xml配置文件**

<listener>
       <description>Spring监听器</description>
       <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>
      
      
       <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:applicationContext.xml</param-value>
       </context-param>

二.Servelet基类

import java.io.IOException;
    import java.io.PrintWriter;
    import java.lang.reflect.Method;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    /**
     * Servlet基类
     * 自定义控制器基类
     */
    public class BaseController extends HttpServlet {
    
    	/**
    	 * Constructor of the object.
    	 */
    	public BaseController() {
    		super();
    	}
    
    	/**
    	 * Destruction of the servlet. <br>
    	 */
    	public void destroy() {
    		super.destroy(); // Just puts "destroy" string in log
    		// Put your code here
    	}
    
    	/**
    	 * The doGet method of the servlet. <br>
    	 * 
    	 * This method is called when a form has its tag value method equals to get.
    	 * 
    	 * @param request
    	 *            the request send by the client to the server
    	 * @param response
    	 *            the response send by the server to the client
    	 * @throws ServletException
    	 *             if an error occurred
    	 * @throws IOException
    	 *             if an error occurred
    	 */
    	/* (non-Javadoc)
    	 * @see javax.servlet.http.HttpServlet#service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
    	 */
    	public void service(HttpServletRequest request, HttpServletResponse response)
    			throws ServletException, IOException {
    
    		response.setContentType("text/html;charset=utf-8");
    		PrintWriter out = response.getWriter();
    		
    		//处理中文
    		request.setCharacterEncoding("utf-8");
    		
    		 // 获得提交的路径 :/find.do  
    		String path=request.getServletPath();
    		System.out.println(path);
    		
    		//获得方法名
    		String methodName=path.substring(1,path.indexOf("."));
    		
    		//利用反射
    		try {
    			Method method=getClass().getDeclaredMethod(methodName, HttpServletRequest.class,HttpServletResponse.class);
    			 // 执行相应的方法  
    			//在当前对象中调用，传递参数request与response,获得返回结果
    			String url=method.invoke(this, request,response).toString();
    			
    			System.out.println(url);
    			
    			//判断如果返回的url是以redirect开始，则是重定向
    			if(url.startsWith("redirect:")){
    				//BookController.do?act=Deletes
    				response.sendRedirect(url.substring(9,url.length()));
    			}else{
    				 // 转发
    				request.getRequestDispatcher(url).forward(request, response);
    			}
    		  
    		} catch (Exception e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
     
    		out.flush();
    		out.close();
    	}
    
    
    }

具体实现类:

import java.io.IOException;
    import java.io.PrintWriter;
    import java.lang.reflect.Method;
    import java.text.ParseException;
    import java.text.SimpleDateFormat;
    import java.util.Date;
    import java.util.List;
    
    import javax.annotation.Resource;
    import javax.security.auth.message.callback.PrivateKeyCallback.Request;
    import javax.servlet.ServletException;
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.context.ApplicationContext;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.context.WebApplicationContext;
    import org.springframework.web.context.support.WebApplicationContextUtils;
    
    import com.hlx.biz.BookBiz;
    import com.hlx.entity.Book;
    
    
    @WebServlet(name = "BookController", urlPatterns = "*.action")
    // 继续父类
    public class BookController extends BaseController {
    
    	/**
    	 * 
    	 */
    	private static final long serialVersionUID = 1L;
    	
    	//处理业务逻辑接口
    	private BookBiz biz;
    
    	/**
    	 * 初始化 创建实例
    	 */
    	@Override
    	public void init() throws ServletException {
    
    		// 在Servlet初始化时获取Spring上下文对象(ApplicationContext)
    		ApplicationContext ac = WebApplicationContextUtils
    				.getWebApplicationContext(this.getServletContext());
    		  //从ApplicationContext中获取userService
    		biz = (BookBiz)ac.getBean("bookBizImpl");
    	}
    
    	/**
    	 * 图书列表Action
    	 * 
    	 * @return
    	 */
    	public String all(HttpServletRequest request, HttpServletResponse response) {
    		//System.out.println("biz=" + biz);
    		request.setAttribute("lists", biz.getAllBooks());
    		return "list.jsp";
    	}