PageHelper

whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/config/MybatisConfig.java

+package org.hongxi.whatsmars.spring.boot.config;
+
+import com.github.pagehelper.PageHelper;
+import com.github.pagehelper.SqlUtilConfig;
+import org.apache.ibatis.plugin.Interceptor;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class MybatisConfig {
+
+    @Bean
+    public Interceptor pageHelper() {
+        PageHelper pageHelper = new PageHelper();
+        SqlUtilConfig sqlUtilConfig = new SqlUtilConfig();
+        sqlUtilConfig.setDialect("mysql");
+        sqlUtilConfig.setOffsetAsPageNum(true);
+        sqlUtilConfig.setRowBoundsWithCount(true);
+        sqlUtilConfig.setPageSizeZero(true);
+        sqlUtilConfig.setReasonable(false);
+        sqlUtilConfig.setSupportMethodsArguments(false);
+        pageHelper.setSqlUtilConfig(sqlUtilConfig);
+        return pageHelper;
+    }
+}

whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/dao/UserMapper.java

@@ -16,4 +16,6 @@ public interface UserMapper {
     void insert(User user);
 
     void insertBatch(List<User> users);
+
+    List<User> query();
 }

whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/service/UserService.java

 package org.hongxi.whatsmars.spring.boot.service;
 
+import com.github.pagehelper.Page;
 import org.hongxi.whatsmars.spring.boot.model.User;
 
 /**
@@ -10,4 +11,6 @@ public interface UserService {
     User findByUsername(String username);
 
     void add(User user);
+
+    Page<User> query(int offset, int limit);
 }

whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/service/impl/UserServiceImpl.java

 package org.hongxi.whatsmars.spring.boot.service.impl;
 
+import com.github.pagehelper.Page;
+import com.github.pagehelper.PageHelper;
 import org.hongxi.whatsmars.spring.boot.dao.UserMapper;
 import org.hongxi.whatsmars.spring.boot.model.User;
 import org.hongxi.whatsmars.spring.boot.service.UserService;
@@ -29,4 +31,9 @@ public class UserServiceImpl implements UserService {
         userMapper.insert(user);
         logger.info("add user success, username: {}", user.getUsername());
     }
+
+    @Override
+    public Page<User> query(int offset, int limit) {
+        return PageHelper.offsetPage(offset, limit).doSelectPage(() -> userMapper.query());
+    }
 }

whatsmars-spring-boot/src/main/resources/mapper/UserMapper.xml

@@ -14,8 +14,12 @@
     <insert id="insertBatch" parameterType="list">
         insert into user(username, nickname, gender, age, create_date, update_date) values
         <foreach collection="list" item="item" separator=",">
-            (#{username}, #{nickname}, #{gender}, #{age}, NOW(), NOW())
+            (#{username}, #{nickname}, #{gender}, #{age}, #{createDate}, #{updateDate})
         </foreach>
     </insert>
 
+    <select id="query" resultType="User">
+        select * from user
+    </select>
+
 </mapper>
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