员工分页查询业务功能开发

sky-server/pom.xml

@@ -66,6 +66,7 @@
             <artifactId>druid-spring-boot-starter</artifactId>
         </dependency>
 
+<!--  mybatis 的分页插件 PageHelper 来简化分页代码的开发 -->
         <dependency>
             <groupId>com.github.pagehelper</groupId>
             <artifactId>pagehelper-spring-boot-starter</artifactId>

sky-server/src/main/java/com/sky/config/WebMvcConfiguration.java

@@ -1,10 +1,14 @@
 package com.sky.config;
 
+
 import com.sky.interceptor.JwtTokenAdminInterceptor;
+import com.sky.json.JacksonObjectMapper;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
 import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
 import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
@@ -15,6 +19,8 @@ import springfox.documentation.service.ApiInfo;
 import springfox.documentation.spi.DocumentationType;
 import springfox.documentation.spring.web.plugins.Docket;
 
+import java.util.List;
+
 /**
  * 配置类，注册web层相关组件
  */
@@ -39,6 +45,7 @@ public class WebMvcConfiguration extends WebMvcConfigurationSupport {
 
     /**
      * 通过knife4j生成接口文档
+     *
      * @return
      */
     @Bean
@@ -59,10 +66,29 @@ public class WebMvcConfiguration extends WebMvcConfigurationSupport {
 
     /**
      * 设置静态资源映射
+     *
      * @param registry
      */
     protected void addResourceHandlers(ResourceHandlerRegistry registry) {
         registry.addResourceHandler("/doc.html").addResourceLocations("classpath:/META-INF/resources/");
         registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
     }
+
+
+
+
+    /**
+     * 扩展Spring MVC框架的消息转化器
+     * @param converters
+     */
+    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
+        log.info("扩展消息转换器...");
+        //创建一个消息转换器对象
+        MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
+        //需要为消息转换器设置一个对象转换器，对象转换器可以将Java对象序列化为json数据
+        converter.setObjectMapper(new JacksonObjectMapper());
+        //将自己的消息转化器加入容器中
+        converters.add(0,converter);
+    }
+
 }

sky-server/src/main/java/com/sky/controller/admin/EmployeeController.java

@@ -3,18 +3,17 @@ package com.sky.controller.admin;
 import com.sky.constant.JwtClaimsConstant;
 import com.sky.dto.EmployeeDTO;
 import com.sky.dto.EmployeeLoginDTO;
+import com.sky.dto.EmployeePageQueryDTO;
 import com.sky.entity.Employee;
 import com.sky.properties.JwtProperties;
+import com.sky.result.PageResult;
 import com.sky.result.Result;
 import com.sky.service.EmployeeService;
 import com.sky.utils.JwtUtil;
 import com.sky.vo.EmployeeLoginVO;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -87,4 +86,15 @@ public class EmployeeController {
         return Result.success();
     }
 
+    /**
+     * 分页查询
+     * @param pageQueryDTO
+     * @return
+     */
+    @GetMapping("/page")
+    public Result<PageResult> page(EmployeePageQueryDTO pageQueryDTO){
+        log.info("分页查询，参数：{}", pageQueryDTO);
+        PageResult pageResult= employeeService.pageQuery(pageQueryDTO);
+        return Result.success(pageResult);
+    }
 }

sky-server/src/main/java/com/sky/mapper/EmployeeMapper.java

@@ -1,5 +1,7 @@
 package com.sky.mapper;
 
+import com.github.pagehelper.Page;
+import com.sky.dto.EmployeePageQueryDTO;
 import com.sky.entity.Employee;
 import org.apache.ibatis.annotations.Insert;
 import org.apache.ibatis.annotations.Mapper;
@@ -24,4 +26,11 @@ public interface EmployeeMapper {
             "values " +
             "(#{name},#{username},#{password},#{phone},#{sex},#{idNumber},#{createTime},#{updateTime},#{createUser},#{updateUser},#{status})")
     void insert(Employee employee);
+
+    /**
+     * 分页查询
+     * @param pageQueryDTO
+     * @return
+     */
+    Page<Employee> pageQuery(EmployeePageQueryDTO pageQueryDTO);
 }

sky-server/src/main/java/com/sky/service/EmployeeService.java

@@ -2,7 +2,9 @@ package com.sky.service;
 
 import com.sky.dto.EmployeeDTO;
 import com.sky.dto.EmployeeLoginDTO;
+import com.sky.dto.EmployeePageQueryDTO;
 import com.sky.entity.Employee;
+import com.sky.result.PageResult;
 
 public interface EmployeeService {
 
@@ -18,4 +20,11 @@ public interface EmployeeService {
      * @param employeeDTO
      */
     void save(EmployeeDTO employeeDTO);
+
+    /**
+     * 分页查询
+     * @param pageQueryDTO
+     * @return
+     */
+    PageResult pageQuery(EmployeePageQueryDTO pageQueryDTO);
 }

sky-server/src/main/java/com/sky/service/impl/EmployeeServiceImpl.java

@@ -1,17 +1,21 @@
 package com.sky.service.impl;
 
+import com.github.pagehelper.Page;
+import com.github.pagehelper.PageHelper;
 import com.sky.constant.MessageConstant;
 import com.sky.constant.PasswordConstant;
 import com.sky.constant.StatusConstant;
 import com.sky.context.BaseContext;
 import com.sky.dto.EmployeeDTO;
 import com.sky.dto.EmployeeLoginDTO;
+import com.sky.dto.EmployeePageQueryDTO;
 import com.sky.entity.Employee;
 import com.sky.exception.AccountLockedException;
 import com.sky.exception.AccountNotFoundException;
 import com.sky.exception.BaseException;
 import com.sky.exception.PasswordErrorException;
 import com.sky.mapper.EmployeeMapper;
+import com.sky.result.PageResult;
 import com.sky.service.EmployeeService;
 import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -19,6 +23,7 @@ import org.springframework.stereotype.Service;
 import org.springframework.util.DigestUtils;
 
 import java.time.LocalDateTime;
+import java.util.List;
 
 @Service
 public class EmployeeServiceImpl implements EmployeeService {
@@ -90,4 +95,23 @@ public class EmployeeServiceImpl implements EmployeeService {
 
         employeeMapper.insert(employee);//后续步骤定义
     }
+
+
+    /**
+     * 分页查询
+     *
+     * @param pageQueryDTO
+     * @return
+     */
+    @Override
+    public PageResult pageQuery(EmployeePageQueryDTO pageQueryDTO) {
+        // select * from employee limit 0,10
+        //开始分页查询
+        PageHelper.startPage(pageQueryDTO.getPage(), pageQueryDTO.getPageSize());
+        Page<Employee> page = employeeMapper.pageQuery(pageQueryDTO);//后续定义
+        long total = page.getTotal();
+        List<Employee> records = page.getResult();
+
+        return new PageResult(total, records);
+    }
 }

sky-server/src/main/resources/mapper/EmployeeMapper.xml

@@ -2,4 +2,13 @@
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
 <mapper namespace="com.sky.mapper.EmployeeMapper">
+    <select id="pageQuery" resultType="com.sky.entity.Employee">
+        select * from employee
+        <where>
+            <if test="name!=null and name != ''">
+                and name like concat('%',#{name},'%')
+            </if>
+        </where>
+        order by create_time desc
+    </select>
 </mapper>