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项目部署如何不带url默认进自己项目？

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1

jetty/tomcat

class="cursor-pointer"> 详细描述

Q25到底会出现什么情况？

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1

数据库

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 源码

  public static void main(String[] args) {
        ApplicationContext act = new ClassPathXmlApplicationContext("spring-mybatis.xml");
        UserService userService = (UserService) act.getBean("userservice");
        for (int i = 0; i < 1000; i++){
            List<User> list =new ArrayList<User>();
            User user = new User();
            user.setCreate_at(System.currentTimeMillis());
            user.setUpdate_at(System.currentTimeMillis());
            user.setName(suji.getrandomname());
            user.setAge(suji.getrandomage());
            list.add(user);
            userService.insertbig(list);
        }
    }

web项目里面json

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json

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

 public String deleteUser(@PathVariable("id") int id){
        if(userService.deleteUser(id)){
            List<User> users = userService.getAllUser();
            ModelAndView mav = new ModelAndView("userlist", "users", users);
            a = 0;
            b = "执行成功!";
            mav.addObject("code", a);
            mav.addObject("message", b);
            return "redirect:/a/student";
        }
        else{
            a=-200;
            b="执行删除失败！";
            ModelAndView mav = new ModelAndView("error");
            mav.addObject("code",a);
            mav.addObject("message",b);
            return mav;
        }

jetty

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1

jetty/tomcat

class="cursor-pointer"> 详细描述

如何使用memcache缓

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memcache

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

查询的SQL语句返回的对象为NULL时如何正确处理？

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数据库

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

  private UserMapper userMapper;
    public String login(User user1, DESUtil desUtil, HttpServletResponse response) throws UnsupportedEncodingException {
        String view = " ";
        logger.info(user1);

        User user2 = userMapper.findByName(user1.getUsername());
       logger.info(user1.getUsername()+user1.getPassword());
       logger.info("user2======\n"+user2.toString());
        if(user2==null){
            logger.info("用户不存在，请重新输入");
            view = "login";
        }

关于spring mvc的404报错

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1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context-4.1.xsd
      http://www.springframework.org/schema/mvc
      http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd">

    <mvc:annotation-driven/>

    <context:component-scan base-package="java"/>

    <context:annotation-config/>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp" />
    </bean>

</beans>

代码错误

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1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 源码

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

public class SQL {
    static Connection con; //声明Connection对象
    static PreparedStatement ps; //声明预处理对象
    static ResultSet res;          //声明结果集对象
    public Connection getConnection(){
        try{
            Class.forName("com.mysql.jdbc.Driver");
            con = DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/sos?characterEncoding=UTF-8","root","123456");
        }catch(Exception e){    // 这是用来执行异常
            e.printStackTrace(); //  e 是exception 引用对象， 来执行exception 里面的方法用e引用printStackTrace
        }
        return con;    //返回Connection对象
    }
    public static void main(String[]args){ // 主方法
        SQL c = new SQL();
        con = c.getConnection();
        try{
            ps = con.prepareCall("select*form hello where id =1");
            ps.setInt(1,1);  //设置参数
            res = ps.executeQuery();
           //如果当前记录不是结构集中最后一行，则进入循环体
            while(res.next()){
                int id = res.getInt(1);//获取结构集中第一列的值
                String name = res.getString("name");
                String hp = res.getString("hp");
                String ss = res.getString("ss");
                System.out.print("编号："+id);
                System.out.print("姓名："+name);
                System.out.print("性别："+hp);
                System.out.print("生日："+ss);
            }
        }catch(Exception e){
            e.printStackTrace();
        }
    }
}

maven导入Junit的jar包后import org无法找到Junit

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maven junit

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

怎么将html转成jsp动态页面？

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1

class="cursor-pointer"> 详细描述