一个整合Thymeleaf与Mybatis的CRUD例子

整合Mybatis例子

一、添加maven依赖

<dependency>

    <groupId>org.springframework.boot</groupId>

    <artifactId>spring-boot-starter-thymeleaf</artifactId>

</dependency>

二、yml文件

spring:

  thymeleaf:

    #模板编码

    mode: LEGACYHTML5

    #是否缓存  别闹不缓存

    cache: false

    # 在构建URL时预先查看名称的前缀

    prefix: classpath:/templates/

    # 构建URL时附加查看名称的后缀.

    suffix: .html

三、sql语句

CREATE TABLE `user` (

  `id` INT(9) NOT NULL AUTO_INCREMENT,

  `name` VARCHAR(10) DEFAULT NULL,

  `age` INT(3) DEFAULT NULL,

  `birth_day` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,

  PRIMARY KEY (`id`)

) ENGINE=INNODB DEFAULT CHARSET=utf8;

INSERT INTO test.user (NAME,age,birth_day) VALUES ("xiaoming",18,NOW());

INSERT INTO test.user (NAME,age,birth_day) VALUES ("xiaohua",19,NOW());

四、静态html文件

　　1、index.html

<!DOCTYPE html>

<html xmlns:th="http://www.thymeleaf.org"

      xmlns:layout="http://www.ultrag.net.nz/thymeleaf/layout"

>

<head>

    <meta charset="UTF-8">

    <title>Thymeleaf in action</title>

</head>

<body>

<div th:replace="~{header::header}"></div>

<h3 th:text="${userModel.title}"></h3>

<div>

    <a th:href="@{/user/form}">创建用户</a>

</div>

<table border="1">

    <thead>

    <tr>

        <td>ID</td>

        <td>age</td>

        <td>Name</td>

        <td>操作</td>

    </tr>

    </thead>

    <tbody>

    <tr th:if="${userModel.userList.size()} eq 0">

        <td colspan="3">没有用户信息！</td>

    </tr>

    <tr th:each="user:${userModel.userList}">

        <td th:text="${user.id}"></td>

        <td th:text="${user.age}"></td>

        <td >

            <a th:href="@{'/user/info/'+${user.id}}" th:text="${user.name}"></a>

        </td>

        <td >

            <a th:href="@{'/user/delete/'+${user.id}}">删除</a>

            <a th:href="@{'/user/modify/'+${user.id}}">修改</a>

        </td>

    </tr>

    </tbody>

</table>

<div th:replace="~{footer::footer}"></div>

</body>

</html>

　　2、add.html

<!DOCTYPE html>

<html xmlns:th="http://www.thymeleaf.org"

      xmlns:layout="http://www.ultrag.net.nz/thymeleaf/layout"

>

<head>

    <meta charset="UTF-8">

    <title>Thymeleaf in action</title>

</head>

<body>

<div th:replace="~{header::header}"></div>

<h3 th:text="${userModel.title}"></h3>

<form action="/user/save" th:action="@{/user/save}" method="POST" th:object="${userModel.user}">

    <input type="hidden" name="id" th:value="*{id}">

    名称：<br>

    <input type="text" name="name" th:value="*{name}">

    <br>

    年龄：<br>

    <select   id="age" name="age" th:value="*{age}">

        <!--<option value="99" selected="true">请选择控制时间</option>-->

        <option th:if="${'1'=='1' && '0'=='0'}" th:each="i:${#numbers.sequence(1,150)}" th:selected="${i+'' eq '18' }" th:value="${i}" th:text="${i}"  ></option>

    </select>

    生日：<br>

    <input type="text" name="birthDay" th:value="*{birthDay}">

    <input type="submit" value="提交" >

</form>

<div th:replace="~{footer::footer}"></div>

<script>

</script>

</body>

</html>

　　3、info.html

<!DOCTYPE html>

<html xmlns:th="http://www.thymeleaf.org"

      xmlns:layout="http://www.ultrag.net.nz/thymeleaf/layout"

>

<head>

    <meta charset="UTF-8">

    <title>Thymeleaf in action</title>

</head>

<body>

<div th:replace="~{header::header}"></div>

<h3 th:text="${userModel.title}"></h3>

<div>

    <p><strong>ID:</strong><span th:text="${userModel.user.id}"></span></p>

    <p><strong>Name:</strong><span th:text="${userModel.user.name}"></span></p>

    <p><strong>age:</strong><span th:text="${userModel.user.age}"></span></p>

    <p><strong>birthDay:</strong><span th:text="${userModel.user.birthDay}"></span></p>

</div>

<div th:replace="~{footer::footer}"></div>

</body>

</html>

　　4、modify.html

<!DOCTYPE html>

<html xmlns:th="http://www.thymeleaf.org"

      xmlns:layout="http://www.ultrag.net.nz/thymeleaf/layout"

>

<head>

    <meta charset="UTF-8">

    <title>Thymeleaf in action</title>

</head>

<body>

<div th:replace="~{header::header}"></div>

<h3 th:text="${userModel.title}"></h3>

<form action="/user/update" th:action="@{/user/update}" method="POST" th:object="${userModel.user}">

    <input type="hidden" name="id" th:value="*{id}">

    名称：<br>

    <input type="text" name="name" th:value="*{name}">

    <br>

    年龄：<br>

    <select   id="age" name="age" >

        <!--<option value="99" selected="true">请选择控制时间</option>-->

        <option th:if="${'1'=='1' && '0'=='0'}" th:each="i:${#numbers.sequence(1,150)}" th:selected="${i eq user.age }" th:value="${i}" th:text="${i}"  ></option>

    </select>

    生日：<br>

    <input type="text" name="birthDay" th:value="*{birthDay}">

    <input type="submit" value="提交" >

</form>

<input type="hidden" name="iasdasdd" th:value="${userModel.user.age}">

<div th:replace="~{footer::footer}"></div>

</body>

</html>

　　5、footer.html

<!DOCTYPE html>

<html xmlns:th="http://www.thymeleaf.org"

      xmlns:layout="http://www.ultrag.net.nz/thymeleaf/layout"

>

<head>

    <meta charset="UTF-8">

    <title>Thymeleaf in action</title>

</head>

<body>

<div th:fragment="footer">

    <a href="http://www.baidu.com">百度一下</a>

</div>

</body>

</html>

　　6、header.html

<!DOCTYPE html>

<html xmlns:th="http://www.thymeleaf.org"

      xmlns:layout="http://www.ultrag.net.nz/thymeleaf/layout"

>

<head>

    <meta charset="UTF-8">

    <title>Thymeleaf in action</title>

</head>

<body>

<div th:fragment="header">

    <h1>Thymeleaf in action</h1>

    <a href="/user/index" >首页</a>

</div>

</body>

</html>

五、java文件

　　1、UserController

package com.ydj.yboot.web.controller;

import com.ydj.yboot.web.domain.User;

import com.ydj.yboot.web.service.UserService;

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

import org.springframework.ui.Model;

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

import org.springframework.web.servlet.ModelAndView;

/**

 * @author yuduojia

 * @date 2019/5/24 13:17

 */

@RestController

@RequestMapping("/user")

public class UserController {

    @Autowired

    private UserService userService;

    @GetMapping("/index")

    public ModelAndView list(Model model) {

        model.addAttribute("userList",userService.getUserList());

        model.addAttribute("title", "用户管理");

        return new ModelAndView("user/index","userModel",model);

    }

    @GetMapping("/form")

    public ModelAndView createForm(Model model) {

        model.addAttribute("user",new User());

        model.addAttribute("title", "创建用户");

        return new ModelAndView("user/add","userModel",model);

    }

    @PostMapping("/save")

    public ModelAndView saveOrUpdateUser( User user) {

        int i = userService.saveUser(user);

        return new ModelAndView("redirect:/user/index");//重定向到list页面

    }

    @GetMapping("/delete/{id}")

    public ModelAndView deleteUser(@PathVariable("id") Long id) {

        userService.deleteUser(id);

        return new ModelAndView("redirect:/user/index");//重定向到list页面

    }

   @GetMapping("/info/{id}")

    public ModelAndView view(@PathVariable("id") Long id,Model model) {

        User user = userService.getUserById(id);

        model.addAttribute("user",user);

        model.addAttribute("title", "查看用户");

        return new ModelAndView("user/info","userModel",model);

    }

    @GetMapping("/modify/{id}")

    public ModelAndView modifyUser(@PathVariable("id") Long id, Model model) {

        model.addAttribute("user",userService.getUserById(id));

        model.addAttribute("title", "修改用户");

        return new ModelAndView("user/modify","userModel",model);

    }

    @PostMapping("/update")

    public ModelAndView updateUser(User user) {

        int l = userService.updateUser(user);

        return new ModelAndView("redirect:/user/index");//重定向到list页面

    }

}

　　2、UserService

package com.ydj.yboot.web.service;

import com.ydj.yboot.web.domain.User;

import java.util.List;

/**

 * @author yuduojia

 * @date 2019/5/24 13:20

 */

public interface UserService {

    List<User> getUserList();

    int saveUser(User user);

    void deleteUser(Long id);

    User getUserById(Long id);

    int updateUser(User user);

}

　　3、UserServiceImpl

package com.ydj.yboot.web.service.impl;

import com.ydj.yboot.web.dao.UserDao;

import com.ydj.yboot.web.domain.User;

import com.ydj.yboot.web.service.UserService;

import org.springframework.stereotype.Service;

import javax.annotation.Resource;

import java.util.List;

/**

 * @author yuduojia

 * @date 2019/5/24 13:21

 */

@Service

public class UserServiceImpl implements UserService {

    @Resource

    private UserDao userDao;

    @Override

    public List<User> getUserList() {

        return userDao.getUserList();

    }

    @Override

    public int saveUser(User user) {

        return userDao.saveUser(user);

    }

    @Override

    public void deleteUser(Long id) {

        userDao.deleteUser(id);

    }

    @Override

    public User getUserById(Long id) {

        return userDao.getUserById(id);

    }

    @Override

    public int updateUser(User user) {

        return userDao.updateUser(user);

    }

}

　　4、UserDao

package com.ydj.yboot.web.dao;

import com.ydj.yboot.web.domain.User;

import org.apache.ibatis.annotations.Mapper;

import java.util.List;

/**

 * @author yuduojia

 * @date 2019/5/24 13:21

 */

@Mapper

public interface UserDao {

    List<User> getUserList();

    int saveUser(User user);

    void deleteUser(Long id);

    User getUserById(Long id);

    int updateUser(User user);

}

　　5、user

package com.ydj.yboot.web.domain;

import java.io.Serializable;

import java.util.Date;

/**

 * @author yuduojia

 * @date 2019/5/24 13:14

 */

public class User implements Serializable {

    private int id;

    private String name;

    private int age;

    private String birthDay;

//    private Dept dept;

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

    public String getBirthDay() {

        return birthDay;

    }

    public void setBirthDay(String birthDay) {

        this.birthDay = birthDay;

    }

    public int getId() {

        return id;

    }

    public void setId(int id) {

        this.id = id;

    }

    @Override

    public String toString() {

        return "User{" +

                "id=" + id +

                ", name='" + name + '\'' +

                ", age=" + age +

                ", birthDay=" + birthDay +

                '}';

    }

}

六、静态mapper.xml文件  UserMapper.xml

<?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.ydj.yboot.web.dao.UserDao">

    <select id="getUserList" resultMap="getUserListResultMap">

        select * from user

        <where>

            <if test="id != null and id != ''"> and id = #{id} </if>

            <if test="name != null and name != ''"> and name = #{name} </if>

            <if test="age != null and age != ''"> and age = #{age} </if>

            <if test="birthDay != null and birthDay != ''"> and birth_day = #{birthDay} </if>

        </where>

    </select>

    <resultMap id="getUserListResultMap" type="com.ydj.yboot.web.domain.User">

        <id column="id" property="id" jdbcType="INTEGER"></id>

        <result column="name" property="name" jdbcType="VARCHAR"></result>

        <result column="age" property="age" jdbcType="INTEGER"></result>

        <result column="birthDay" property="birth_day" jdbcType="TIMESTAMP"></result>

        <!--<association property="Dept" javaType="com.ydj.yboot.web.domain.Dept">

            <result column="dept_name" property="deptName"></result>

        </association>-->

    </resultMap>

    <insert id="saveUser" parameterType="com.ydj.yboot.web.domain.User"

            useGeneratedKeys="true" keyProperty="id">

        insert into user

        (

        `name`,

        `age`,

        `birth_day`

        )

        values

        (

        #{name},

        #{age},

        #{birthDay}

        )

    </insert>

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

        delete from user where id = #{value}

    </delete>

    <select id="getUserById" resultType="com.ydj.yboot.web.domain.User">

        select * from user where id = #{value}

    </select>

    <update id="updateUser" parameterType="com.ydj.yboot.web.domain.User">

        update user

        <set>

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

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

            <if test="birthDay != null">`birth_day` = #{birthDay} </if>

        </set>

        where id = #{id}

    </update>

</mapper>

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