fix:插入数据

src/main/java/com/kwan/spring5/User.java

 package com.kwan.spring5;
 
-import org.springframework.stereotype.Component;
-
 /**
  * 用户
  *
@@ -9,8 +7,9 @@ import org.springframework.stereotype.Component;
  * @version : 2.2.0
  * @date : 2022/11/12 19:22
  */
-@Component(value = "user")
 public class User {
+    public User() {
+    }
 
     /**
      * 普通方法

src/main/java/com/kwan/spring5/dao/BookDao.java

@@ -2,6 +2,24 @@ package com.kwan.spring5.dao;
 
 import com.kwan.spring5.Book;
 
+import java.util.List;
+
 public interface BookDao {
     void add(Book book);
+
+    void updateBook(Book book);
+
+    void delete(String id);
+
+
+    int selectCount();
+
+
+    Book findBookInfo(String id);
+
+    List<Book> findAllBook();
+
+    void batchAddBook(List<Object[]> batchArgs);
+
+    void batchUpdateBook(List<Object[]> batchArgs);
 }

src/main/java/com/kwan/spring5/dao/impl/BookDaoImpl.java

@@ -3,9 +3,20 @@ package com.kwan.spring5.dao.impl;
 import com.kwan.spring5.Book;
 import com.kwan.spring5.dao.BookDao;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.BeanPropertyRowMapper;
 import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.stereotype.Repository;
 
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * book-dao实现类
+ *
+ * @author : qinyingjie
+ * @version : 2.2.0
+ * @date : 2022/11/15 22:33
+ */
 @Repository
 public class BookDaoImpl implements BookDao {
     /**
@@ -28,4 +39,94 @@ public class BookDaoImpl implements BookDao {
         int update = jdbcTemplate.update(sql, args);
         System.out.println(update);
     }
+
+    /**
+     * 修改
+     *
+     * @param book
+     */
+    @Override
+    public void updateBook(Book book) {
+        String sql = "UPDATE t_book SET username=?,ustatus=? WHERE user_id=?";
+        Object[] args = {book.getUsername(), book.getUstatus(), book.getUserId()};
+        int update = jdbcTemplate.update(sql, args);
+        System.out.println(update);
+    }
+
+    /**
+     * 删除
+     *
+     * @param id
+     */
+    @Override
+    public void delete(String id) {
+        String sql = "DELETE FROM t_book WHERE user_id=?";
+        int update = jdbcTemplate.update(sql, id);
+        System.out.println(update);
+    }
+
+    /**
+     * 查询表记录数
+     *
+     * @return
+     */
+    @Override
+    public int selectCount() {
+        String sql = "SELECT COUNT(*) FROM t_book";
+        //queryForObject方法中：第一个参数代表--sql语句；第二个参数代表--返回类型class
+        return jdbcTemplate.queryForObject(sql, Integer.class);
+    }
+
+    /**
+     * 查询返回对象
+     *
+     * @param id
+     * @return
+     */
+    @Override
+    public Book findBookInfo(String id) {
+        String sql = "SELECT * FROM t_book WHERE user_id=?";
+
+        /*
+         * queryForObject方法中：
+         * 		第一个参数：sql语句
+         * 		第二个参数：RowMapper 是接口，针对返回不同类型数据，使用这个接口里面 实现类 完成数据封装
+         * 		第三个参数：sql 语句值
+         */
+        return jdbcTemplate.queryForObject(sql, new BeanPropertyRowMapper<>(Book.class), id);
+    }
+
+    /**
+     * 所用场景：查询图书列表分页
+     * 查询返回集合
+     *
+     * @return
+     */
+    @Override
+    public List<Book> findAllBook() {
+        String sql = "SELECT * FROM t_book";
+        //调用方法
+        return jdbcTemplate.query(sql, new BeanPropertyRowMapper<>(Book.class));
+    }
+
+    /**
+     * 批量添加
+     */
+    @Override
+    public void batchAddBook(List<Object[]> batchArgs) {
+        String sql = "INSERT INTO t_book VALUES(?,?,?)";
+        //batchUpdate方法 第一个参数：sql语句 第二个参数：List集合，添加多条记录数据
+        int[] ints = jdbcTemplate.batchUpdate(sql, batchArgs);
+        System.out.println(Arrays.toString(ints));
+    }
+
+    /**
+     * 批量修改(同批量添加一样，调用同一个方法)
+     */
+    @Override
+    public void batchUpdateBook(List<Object[]> batchArgs) {
+        String sql = "UPDATE t_book SET username=?,ustatus=? WHERE user_id=?";
+        int[] ints = jdbcTemplate.batchUpdate(sql, batchArgs);
+        System.out.println(Arrays.toString(ints));
+    }
 }
\ No newline at end of file

src/main/resources/spring23.xml

-<?xml version="1.0" encoding="UTF-8"?>
-<beans xmlns="http://www.springframework.org/schema/beans"
-       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-       xmlns:context="http://www.springframework.org/schema/context"
-       xmlns:aop="http://www.springframework.org/schema/aop"
-       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-                        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
-                        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
-
-
-    <!-- 开启注解扫描 -->
-    <context:component-scan base-package="com.kwan"></context:component-scan>
-
-    <!-- 开启Aspect生成代理对象-->
-    <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
-
-</beans>
\ No newline at end of file

src/test/java/Spring_23_.java

-import com.kwan.spring5.User;
-import org.junit.Test;
-import org.springframework.context.ApplicationContext;
-import org.springframework.context.support.ClassPathXmlApplicationContext;
-
-/**
- * jdk动态代理
- *
- * @author : qinyingjie
- * @version : 2.2.0
- * @date : 2022/11/12 18:43
- */
-public class Spring_23_ {
-
-    @Test
-    public void test1() {
-        ApplicationContext ctx =
-                new ClassPathXmlApplicationContext("spring23.xml");
-        User user =  ctx.getBean("user",User.class);
-        user.add();
-        System.out.println(user);
-    }
-
-}

src/test/java/Spring_24_.java

@@ -15,7 +15,7 @@ public class Spring_24_ {
     @Test
     public void test1() {
         ApplicationContext ctx =
-                new ClassPathXmlApplicationContext("spring23.xml");
+                new ClassPathXmlApplicationContext("spring24.xml");
         User user = (User) ctx.getBean("user");
         user.add();
         System.out.println(user);