Initial commit

.idea/compiler.xml

@@ -34,7 +34,7 @@
       <module name="springboot_06_mybatis_plus" target="17" />
       <module name="springboot_07_druid" target="17" />
       <module name="springboot_07_durid" target="17" />
-      <module name="springboot_08_ssmp" target="17" />
+      <module name="springboot_08_ssmp" target="1.8" />
     </bytecodeTargetLevel>
   </component>
   <component name="JavacSettings">

springboot_08_ssmp/pom.xml

@@ -14,7 +14,7 @@
     <name>springboot_08_ssmp</name>
     <description>Demo project for Spring Boot</description>
     <properties>
-        <java.version>17</java.version>
+        <java.version>1.8</java.version>
     </properties>
     <dependencies>
         <dependency>

springboot_08_ssmp/src/main/java/com/yv/config/MPConfig.java

@@ -0,0 +1,20 @@
+package com.yv.config;
+
+import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
+import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * @author YoVinchen
+ * @date 2023/3/15 下午 9:58
+ */
+@Configuration
+public class MPConfig {
+    @Bean
+    public MybatisPlusInterceptor mybatisPlusInterceptor() {
+        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
+        interceptor.addInnerInterceptor(new PaginationInnerInterceptor());
+        return interceptor;
+    }
+}

springboot_08_ssmp/src/main/java/com/yv/service/BookService.java

@@ -0,0 +1,41 @@
+package com.yv.service;
+
+import com.yv.admain.Book;
+
+import java.util.List;
+
+/**
+ * @author YoVinchen
+ * @date 2023/3/15 下午 10:39
+ */
+public interface BookService {
+    /**
+     * @param book
+     * @return
+     */
+    Boolean save(Book book);
+
+    /**
+     * @param book
+     * @return
+     */
+    Boolean update(Book book);
+
+    /**
+     * @param id
+     * @return
+     */
+    Boolean delete(Integer id);
+
+    /**
+     * @param id
+     * @return
+     */
+    Book getById(Integer id);
+
+    /**
+     * @return
+     */
+    List<Book> getAll();
+
+}

springboot_08_ssmp/src/main/java/com/yv/service/impl/BookServiceImpl.java

@@ -0,0 +1,45 @@
+package com.yv.service.impl;
+
+import com.yv.admain.Book;
+import com.yv.dao.BookDao;
+import com.yv.service.BookService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+/**
+ * @author YoVinchen
+ * @date 2023/3/15 下午 10:42
+ */
+@Service
+public class BookServiceImpl implements BookService {
+
+    @Autowired
+    private BookDao bookDao;
+
+    @Override
+    public Boolean save(Book book) {
+        return bookDao.insert(book) > 0;
+    }
+
+    @Override
+    public Boolean update(Book book) {
+        return bookDao.updateById(book) > 0;
+    }
+
+    @Override
+    public Boolean delete(Integer id) {
+        return bookDao.deleteById(id) > 0;
+    }
+
+    @Override
+    public Book getById(Integer id) {
+        return bookDao.selectById(id);
+    }
+
+    @Override
+    public List<Book> getAll() {
+        return bookDao.selectList(null);
+    }
+}

springboot_08_ssmp/src/main/resources/application.yml

@@ -13,7 +13,10 @@ mybatis-plus:
     db-config:
       table-prefix: tbl_
       id-type: auto
+  configuration:
+    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
 
 #端口配置
 server:
   port: 8080
+

springboot_08_ssmp/src/test/java/com/yv/dao/BookDaoTest.java

@@ -55,12 +55,17 @@ public class BookDaoTest {
 
     @Test
     void testGetPage() {
-        IPage page = new Page(2, 5);
+        IPage page = new Page(1, 5);
         bookDao.selectPage(page, null);
+        //当前页
         System.out.println(page.getCurrent());
+        //每页中数据数
         System.out.println(page.getSize());
+        //总数据
         System.out.println(page.getTotal());
+        //总页数
         System.out.println(page.getPages());
+        //数据
         System.out.println(page.getRecords());
     }
 
@@ -73,9 +78,21 @@ public class BookDaoTest {
 
     @Test
     void testGetBy2() {
-        String name = "1";
+        String name = "Spring";
         LambdaQueryWrapper<Book> lqw = new LambdaQueryWrapper<Book>();
-        //if(name != null) lqw.like(Book::getName,name);
+        //JDK17报错ew.sqlSegment != null，JDK1.8没有问题
+        if (name != null) lqw.like(Book::getName, name);
+        bookDao.selectList(lqw);
+    }
+
+    /**
+     * 以Test3为标准
+     */
+    @Test
+    void testGetBy3() {
+        String name = null;
+        LambdaQueryWrapper<Book> lqw = new LambdaQueryWrapper<Book>();
+        //JDK17报错ew.sqlSegment != null，JDK1.8没有问题
         lqw.like(name != null, Book::getName, name);
         bookDao.selectList(lqw);
     }