Tomcat出现404的解决方法[类型 状态报告 消息 请求的资源[/]不可用 描述 源服务器未能找到目标资源的表示或者是不愿公开一个已经存在的资源]

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    jee.pk3.AppListener
 
 
 
    SearchServlet
    SearchServlet
    jee.pk3.SearchServlet
 
 
    SearchServlet
    /SearchServlet
 

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public class AppListener implements ServletContextListener {

    @Override
    public void contextInitialized(ServletContextEvent arg0) {
       
        try {
            SqlSessionFactoryUtil.init();
        } catch (IOException e) {
           
            e.printStackTrace();
        }
    }

}

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public class SearchServlet extends httpservlet {
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        req.setCharacterEncoding("UTF-8");
        String name=req.getParameter("name");
        String sno=req.getParameter("sno");
        String gender=req.getParameter("gender");
        Student stu=new Student();
        stu.setName(name);
        stu.setSno(sno);
        stu.setGender(gender);

        SqlSessionFactory sqlSessionFactory=SqlSessionFactoryUtil.getInsertance();
        try (SqlSession sqlSession=sqlSessionFactory.openSession(true)){
            StudentMapper studentMapper=sqlSession.getMapper(StudentMapper.class);
            List list=studentMapper.search(stu);
            System.out.println(list);
        }
    }

}

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public class SqlSessionFactoryUtil {

    public static SqlSessionFactory sqlSessionFactory;
    public static void init() throws IOException {
        String config="mybatis_config.xml";
        InputStream is=Resources.getResourceAsStream(config);
        sqlSessionFactory =new SqlSessionFactoryBuilder().build(is);
    }
   
    public static SqlSessionFactory getInsertance() {
        return sqlSessionFactory;
    }
   
}

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public interface StudentMapper {
    public List search(Student stu);
}

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  PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
  "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 


   
   
   
   
   


    select * from t_students where s_name=#{name}