From 1faf6709b39366a16e2e8523afa2d7a18e541618 Mon Sep 17 00:00:00 2001
From: javahongxi <javahongxi@qq.com>
Date: Mon, 22 Jan 2018 18:47:34 +0800
Subject: [PATCH] PageHelper

---
 .../spring/boot/config/MybatisConfig.java     | 25 +++++++++++++++++++
 .../whatsmars/spring/boot/dao/UserMapper.java |  2 ++
 .../spring/boot/service/UserService.java      |  3 +++
 .../boot/service/impl/UserServiceImpl.java    |  7 ++++++
 .../src/main/resources/mapper/UserMapper.xml  |  6 ++++-
 5 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/config/MybatisConfig.java

diff --git a/whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/config/MybatisConfig.java b/whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/config/MybatisConfig.java
new file mode 100644
index 00000000..6cdf3118
--- /dev/null
+++ b/whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/config/MybatisConfig.java
@@ -0,0 +1,25 @@
+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;
+    }
+}
diff --git a/whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/dao/UserMapper.java b/whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/dao/UserMapper.java
index bc19a148..84cd7a99 100644
--- a/whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/dao/UserMapper.java
+++ b/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();
 }
diff --git a/whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/service/UserService.java b/whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/service/UserService.java
index 9f7a13ff..ed7a1176 100644
--- a/whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/service/UserService.java
+++ b/whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/service/UserService.java
@@ -1,5 +1,6 @@
 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);
 }
diff --git a/whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/service/impl/UserServiceImpl.java b/whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/service/impl/UserServiceImpl.java
index 888f5bdb..99c317a6 100644
--- a/whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/service/impl/UserServiceImpl.java
+++ b/whatsmars-spring-boot/src/main/java/org/hongxi/whatsmars/spring/boot/service/impl/UserServiceImpl.java
@@ -1,5 +1,7 @@
 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());
+    }
 }
diff --git a/whatsmars-spring-boot/src/main/resources/mapper/UserMapper.xml b/whatsmars-spring-boot/src/main/resources/mapper/UserMapper.xml
index a197b4c6..a0439f56 100644
--- a/whatsmars-spring-boot/src/main/resources/mapper/UserMapper.xml
+++ b/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>
\ No newline at end of file
-- 
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