• 条件

• 使用Spring boot、mybatis、mysql实现以下功能

1. 用户列表

2. 用户增加

3. 信息修改

4. 信息查看

5. 用户搜索

6. 分页

   ps: 页面引擎使用Spring boot推荐的thymeleaf引擎

• 效果图如下

TIM图片20190523231857.png

• 步骤

1. 使用IDEA的Spring Initializr构建

2. 模板选择web、Thymeleaf、MyBatis、MySQL（以上步骤都不懂的自行百度）

3. 在src下创建以下包名，目录如下：

   src

   main

   java

   com.xxx.xxx

   controller

   mapper

   pojo

   tools

   resources

   templates

4. 修改resources目录下的application.properties

   #thymeleaf 配置
   spring.thymeleaf.mode=HTML5
   spring.thymeleaf.encoding=UTF-8
   spring.thymeleaf.servlet.content-type=text/html
   #缓存设置为false, 这样修改之后马上生效，便于调试
   spring.thymeleaf.cache=false
   
   #数据库配置
   spring.datasource.url=jdbc:mysql://127.0.0.1:3306/zx?useSSL=false&serverTimezone=GMT%2B8&allowPublicKeyRetrieval=true
   spring.datasource.username=root
   spring.datasource.password=root
   # Mysql8.0请改为com.mysql.cj.jdbc.Driver
   spring.datasource.driver-class-name=com.mysql.jdbc.Driver
   

5. 在pom.xml的<dependencies>中加入以下配置

   <!-- servlet依赖. -->
   <dependency>
       <groupId>javax.servlet</groupId>
       <artifactId>javax.servlet-api</artifactId>
   </dependency>
   <dependency>
       <groupId>javax.servlet</groupId>
       <artifactId>jstl</artifactId>
   </dependency>
   <!-- tomcat的支持.-->
   <dependency>
       <groupId>org.apache.tomcat.embed</groupId>
       <artifactId>tomcat-embed-jasper</artifactId>
   </dependency>
   <!-- pageHelper 用于分页 -->
   <dependency>
       <groupId>com.github.pagehelper</groupId>
       <artifactId>pagehelper</artifactId>
       <version>4.1.6</version>
   </dependency>
   

6. 在pojo里添加实体类

   public class Users {
       private int id;
       private String mobName;
       private String userName;
       ...
   }
   

7. 在mapper里添加注解方式数据库操作接口

   @Mapper
   public interface UsersMapper {
   
       @Select("select * from users where CONCAT(mobName,userName,nickname,phone) like CONCAT('%',#{name},'%')")
       List<Users> getUsersList(String name);
   
       @Insert("insert into users (id,mobName,userName,nickname,phone,register) " +
               "values (#{id},#{mobName},#{userName},#{nickname},#{phone},#{register})")
       public int add(Users users);
   
       @Delete(" delete from users where id= #{id} ")
       public void del(int id);
   
       @Select("select * from users where id= #{id} ")
       public Users getUser(int id);
   
       @Update("update users set " +
               "mobName = #{mobName}," +
               "userName = #{userName}," +
               "nickname = #{nickname}," +
               "phone = #{phone}," +
               "register = #{register} " +
               "where id=#{id} ")
       public int update(Users users);
   
   }
   

8. 在tools里添加分页工具类

import com.github.pagehelper.PageHelper;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.Properties;

@Configuration
public class PageHelperConfig {
    @Bean
    public PageHelper pageHelper() {
        PageHelper pageHelper = new PageHelper();
        Properties properties = new Properties();
        properties.setProperty("offsetAsPageNum", "true");
        properties.setProperty("rowBoundsWithCount", "true");
        properties.setProperty("reasonable", "true");
        pageHelper.setProperties(properties);
        return pageHelper;
    }
}

9. 添加controller

@Controller
public class UserController {
    @Resource
    private UsersMapper usersMapper;

    //添加页面
    @RequestMapping("add")
    public String add() {
        return "add";
    }

    //查找(用于查询)
    @RequestMapping("getUser")
    public String getUser(int id, Model model) throws Exception {
        Users Users = usersMapper.getUser(id);
        model.addAttribute("Users", Users);
        return "userShow";
    }
    
    ...
}

10. 在templates添加.html页面

• 具体代码请看

源码

• PageHelper详解

分页工具地址

PageHelper.startPage(int PageNum,int PageSize): 用来设置页面的位置和展示的数据条目数；

PageInfo<xxx> pageInfo = new PageInfo<xxx>(list); PageInfo用来封装页面信息，返回给前台界面

pageHelper中一些常见的参数：