分页查询的实现

src/main/java/com/aos/fileidentify/AosFileIdentifyApplication.java

@@ -15,7 +15,6 @@ import org.springframework.boot.autoconfigure.SpringBootApplication;
  * @since 0.0.1
  */
 @SpringBootApplication
-@MapperScan("com.aos.fileidentify.mapper")
 public class AosFileIdentifyApplication {
 
     /**

src/main/java/com/aos/fileidentify/config/MybatisPlusConfig.java

@@ -0,0 +1,29 @@
+package com.aos.fileidentify.config;
+
+import com.baomidou.mybatisplus.annotation.DbType;
+import com.baomidou.mybatisplus.autoconfigure.ConfigurationCustomizer;
+import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
+import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
+import org.mybatis.spring.annotation.MapperScan;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@MapperScan("com.aos.fileidentify.mapper")
+public class MybatisPlusConfig {
+    /**
+     * IPage的分页使用的是拦截器，属于物理分页，好处就是处理大量数据时，查询速度快。
+     * 有兴趣的同学可以看看什么是物理分页和逻辑分页。
+     *
+     * @return
+     */
+    @Bean
+    public MybatisPlusInterceptor mybatisPlusInterceptor() {
+        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
+        //向Mybatis过滤器链中添加分页拦截器
+        interceptor.addInnerInterceptor(new
+                PaginationInnerInterceptor(DbType.MYSQL));
+        return interceptor;
+    }
+
+}

src/main/java/com/aos/fileidentify/controller/EmployeeController.java

@@ -4,6 +4,7 @@ import com.aos.fileidentify.common.ResultDTO;
 import com.aos.fileidentify.entity.Employee;
 import com.aos.fileidentify.service.EmployeeService;
 
+import com.baomidou.mybatisplus.core.metadata.IPage;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
@@ -14,6 +15,8 @@ import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
 import lombok.AllArgsConstructor;
 
+import javax.validation.constraints.NotBlank;
+
 /**
  * <p>Company: 成都返空汇网络技术有限公司</p>
  * <p>Description:  </p>
@@ -45,4 +48,16 @@ public class EmployeeController {
         return this.employeeService.getAllEmployee();
     }
 
+    /**
+     * Gets all employee *
+     *
+     * @return the all employee
+     * @since 0.0.1
+     */
+    @ApiOperation(value = "员工所有数据查询")
+    @GetMapping(value = "/page")
+    public ResultDTO<IPage<Employee>> getAllEmployee(@NotBlank Integer page, @NotBlank Integer pageSize) {
+        return this.employeeService.getAllEmployee(page, pageSize);
+    }
+
 }

src/main/java/com/aos/fileidentify/service/EmployeeService.java

@@ -2,6 +2,7 @@ package com.aos.fileidentify.service;
 
 import com.aos.fileidentify.common.ResultDTO;
 import com.aos.fileidentify.entity.Employee;
+import com.baomidou.mybatisplus.core.metadata.IPage;
 
 import java.util.List;
 
@@ -22,5 +23,8 @@ public interface EmployeeService {
      * @return the all employee
      * @since 0.0.1
      */
+    ResultDTO<IPage<Employee>> getAllEmployee(Integer page, Integer pageSize);
+
+
     ResultDTO<List<Employee>> getAllEmployee();
 }

src/main/java/com/aos/fileidentify/service/impl/EmployeeServiceImpl.java

@@ -4,12 +4,19 @@ import com.aos.fileidentify.common.ResultDTO;
 import com.aos.fileidentify.entity.Employee;
 import com.aos.fileidentify.mapper.EmployeeMapper;
 import com.aos.fileidentify.service.EmployeeService;
+import com.baomidou.mybatisplus.core.conditions.Wrapper;
 import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
 
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import com.baomidou.mybatisplus.core.metadata.IPage;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.sun.net.httpserver.Authenticator;
 import org.springframework.stereotype.Service;
 
+import java.util.Collection;
 import java.util.List;
+import java.util.Map;
+import java.util.function.Function;
 
 import lombok.AllArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -31,8 +38,15 @@ public class EmployeeServiceImpl implements EmployeeService {
 
     private final EmployeeMapper employeeMapper;
 
+    @Override
+    public ResultDTO<IPage<Employee>> getAllEmployee(Integer page, Integer pageSize) {
+
+        return new ResultDTO<>(true, 20000, this.employeeMapper.selectPage(new Page<>(page, pageSize), null), null);
+    }
+
     @Override
     public ResultDTO<List<Employee>> getAllEmployee() {
-        return new ResultDTO<>(true, 20000, employeeMapper.selectList(new QueryWrapper<>()), null);
+        QueryWrapper<Employee> queryWrapper = new QueryWrapper<>();
+        return new ResultDTO<>(true, 20000, employeeMapper.selectList(queryWrapper.lambda().eq(Employee::getEmployeeKey, "1f1c8258ba2226e6a6851e62741418d7")), null);
     }
 }