SpringMVC+myBatis如何结合使用

发布时间:2021-12-16 10:17:26 作者:小新
来源:亿速云 阅读:126

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1. [代码]控制器片段     

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package com.wg.test;

 

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.servlet.ModelAndView;

import com.wg.bean.User;

import com.wg.service.UserService;

 

@Controller

public class UserController {

 

    @Autowired

    private UserService userService;

 

    @RequestMapping(value = "regist", method = RequestMethod.POST)

    public ModelAndView regist(HttpServletRequest request, User user) {

        try {

            userService.saveUser(user);

        } catch (Exception e) {

            e.printStackTrace();

        }

        request.setAttribute("username", user.getUsername());

        request.setAttribute("password", user.getPassword());

        System.out.println(user.toString());

        return new ModelAndView("succ");

    }

 

    /***

     * 用户登陆

     * <p>

     * 注解配置,只允许POST提交到该方法

     *

     * @param username

     * @param password

     * @return

     */

    @RequestMapping(value = "login", method = RequestMethod.POST)

    public ModelAndView login(String username, String password) {

        // 验证传递过来的参数是否正确,否则返回到登陆页面。

        if (this.checkParams(new String[] { username, password })) {

            // 指定要返回的页面为succ.jsp

            ModelAndView mav = new ModelAndView("succ");

            // 将参数返回给页面

            mav.addObject("username", username);

            mav.addObject("password", password);

            System.out

                    .println("username=" + username + " password=" + password);

            return mav;

        }

        return new ModelAndView("home");

    }

 

    /***

     * 验证参数是否为空

     *

     * @param params

     * @return

     */

    private boolean checkParams(String[] params) {

        for (String param : params) {

            if (param == "" || param == null || param.isEmpty()) {

                return false;

            }

        }

        return true;

    }

}

2. [代码]web.xml配置     

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<?xml version="1.0" encoding="UTF-8"?> 

<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" 

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 

    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee  

    http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> 

       

    <!-- 监听spring上下文容器 --> 

    <listener> 

        <listener-class> 

            org.springframework.web.context.ContextLoaderListener 

        </listener-class> 

    </listener> 

       

    <!-- 加载spring的xml配置文件到 spring的上下文容器中 --> 

    <context-param> 

        <param-name>contextConfigLocation</param-name> 

        <param-value>classpath:*-context.xml</param-value> 

    </context-param> 

       

    <!-- 配置Spring MVC DispatcherServlet --> 

    <servlet> 

        <servlet-name>MVC</servlet-name> 

        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 

        <!-- 初始化参数 --> 

        <init-param> 

            <!-- 加载SpringMVC的xml到 spring的上下文容器中 --> 

            <param-name>contextConfigLocation</param-name> 

            <param-value> 

                /WEB-INF/classes/mvc-context.xml 

            </param-value> 

        </init-param> 

        <load-on-startup>1</load-on-startup> 

    </servlet> 

   

    <!-- 配置DispatcherServlet所需要拦截的 url --> 

    <servlet-mapping> 

        <servlet-name>MVC</servlet-name> 

        <url-pattern>*.do</url-pattern> 

    </servlet-mapping> 

   

    <welcome-file-list> 

        <welcome-file>index.jsp</welcome-file> 

    </welcome-file-list> 

   

   

</web-app>

3. [代码]spring-mvc配置     

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<?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:p="http://www.springframework.org/schema/p"

    xmlns:context="http://www.springframework.org/schema/context"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

  http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

  http://www.springframework.org/schema/context

  http://www.springframework.org/schema/context/spring-context-3.0.xsd">

 

    <context:component-scan base-package="com.wg.*" />

 

    <bean id="viewResolver"

        class="org.springframework.web.servlet.view.UrlBasedViewResolver">

        <property name="viewClass"

            value="org.springframework.web.servlet.view.JstlView" />

        <property name="prefix" value="/page/" />

        <property name="suffix" value=".jsp" />

    </bean>

</beans>

4. [代码]userMapper配置     

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<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"

"http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.wg.dao.UserDao">

    <!-- 取得用户列表 -->

    <select id="getUser" resultType="User" parameterType="User">

        select

        id,

        username,

        password

        From user

        <where>

            <if test="username != null and password != null">

                username =#{username} and password =#{password}

            </if>

            <if test="id!=null">

                and id=#{id}

            </if>

        </where>

    </select>

    <!-- 新增用户 -->

    <insert id="insertUser" parameterType="User">

        insert into user(id,username,password) values(#{id},#{username},#{password})

        <selectKey keyProperty="id" resultType="Long">

            select last_insert_id() as id

        </selectKey>

    </insert>

    <!-- 修改用户 -->

    <update id="updateUser" parameterType="User">

        update user

        <set>

            <if test="username != null">username=#{username},</if>

            <if test="password != null">password=#{password},</if>

        </set>

        where id=#{id}

    </update>

    <!-- 删除用户 -->

    <delete id="deleteUser" parameterType="Long">

        delete from user where id=#{id}

    </delete>

 

</mapper>

感谢各位的阅读!关于“SpringMVC+myBatis如何结合使用”这篇文章就分享到这里了,希望以上内容可以对大家有一定的帮助,让大家可以学到更多知识,如果觉得文章不错,可以把它分享出去让更多的人看到吧!

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