日考8

.gitignore

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+######################################################################
+# Build Tools
+
+.gradle
+/build/
+!gradle/wrapper/gradle-wrapper.jar
+
+target/
+!.mvn/wrapper/maven-wrapper.jar
+
+######################################################################
+# IDE
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### JRebel ###
+rebel.xml
+### NetBeans ###
+nbproject/private/
+build/*
+nbbuild/
+dist/
+nbdist/
+.nb-gradle/
+
+######################################################################
+# Others
+*.log
+*.xml.versionsBackup
+*.swp
+
+!*/build/*.java
+!*/build/*.html
+!*/build/*.xml

billManager.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module-library">
+      <library name="Unnamed">
+        <CLASSES />
+        <JAVADOC />
+        <SOURCES />
+      </library>
+    </orderEntry>
+    <orderEntry type="library" name="lib" level="project" />
+    <orderEntry type="library" name="lib (2)" level="project" />
+  </component>
+</module>

sql/day08.sql

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+/*
+ Navicat Premium Data Transfer
+
+ Source Server         : 本机
+ Source Server Type    : MySQL
+ Source Server Version : 50744
+ Source Host           : localhost:3306
+ Source Schema         : high-six-exam
+
+ Target Server Type    : MySQL
+ Target Server Version : 50744
+ File Encoding         : 65001
+
+ Date: 26/07/2024 09:16:23
+*/
+
+SET NAMES utf8mb4;
+SET FOREIGN_KEY_CHECKS = 0;
+
+-- ----------------------------
+-- Table structure for day08_bill
+-- ----------------------------
+DROP TABLE IF EXISTS `day08_bill`;
+CREATE TABLE `day08_bill`  (
+  `billId` int(11) NOT NULL AUTO_INCREMENT COMMENT '账单编号',
+  `billDate` datetime NULL DEFAULT NULL COMMENT '账单时间',
+  `billMonerv` double(10, 2) NULL DEFAULT NULL COMMENT '账单金额',
+  PRIMARY KEY (`billId`) USING BTREE
+) ENGINE = InnoDB AUTO_INCREMENT = 3 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Dynamic;
+
+-- ----------------------------
+-- Records of day08_bill
+-- ----------------------------
+INSERT INTO `day08_bill` VALUES (1, '2024-07-26 09:03:23', 111.00);
+INSERT INTO `day08_bill` VALUES (2, '2024-07-27 09:03:29', 222.00);
+
+SET FOREIGN_KEY_CHECKS = 1;

src/com/bw/dao/Bill.java

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+package com.bw.dao;
+
+
+/**
+ * @Author：胡杨
+ * @name：Bill
+ * @Date：2024/7/26 上午8:42
+ * @Description: com.bw.dao
+ */
+
+public class Bill {
+
+    /** 账单编号*/
+    private String billId;
+
+    /** 账单时间*/
+    private String billDate;
+
+    /** 账单金额*/
+    private String billMonerv;
+
+
+    public String getBillId() {
+        return billId;
+    }
+
+    public void setBillId(String billId) {
+        this.billId = billId;
+    }
+
+    public String getBillDate() {
+        return billDate;
+    }
+
+    public void setBillDate(String billDate) {
+        this.billDate = billDate;
+    }
+
+    public String getBillMonerv() {
+        return billMonerv;
+    }
+
+    public void setBillMonerv(String billMonerv) {
+        this.billMonerv = billMonerv;
+    }
+
+    public Bill() {
+    }
+
+    public Bill(String billId, String billDate, String billMonerv) {
+        this.billId = billId;
+        this.billDate = billDate;
+        this.billMonerv = billMonerv;
+    }
+}

src/com/bw/servlet/BillServlet.java

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+package com.bw.servlet;
+
+import com.bw.util.BaseDao;
+
+import java.sql.CallableStatement;
+import java.sql.Connection;
+import java.sql.Date;
+
+/**
+ * @Author：胡杨
+ * @name：BillServlet
+ * @Date：2024/7/26 上午8:52
+ * @Description: com.bw.servlet
+ */
+
+
+public class BillServlet {
+
+    public static void main(String[] args) {
+        try {
+            Connection connection = BaseDao.create();
+            CallableStatement callableStatement = connection.prepareCall("select * from day08_bill");
+
+            int billId = callableStatement.getInt("billId");
+            Date billDate = callableStatement.getDate("billDate");
+            double billMonerv = callableStatement.getDouble("billMonerv");
+            System.out.println(billId+" "+billDate+" "+billMonerv);
+            connection.close();
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

src/com/bw/util/BaseDao.java

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+package com.bw.util;
+
+import java.sql.*;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @Author：胡杨
+ * @name：BaseDao
+ * @Date：2023/11/22 14:33
+ * @Description: com.bw.util
+ */
+public class BaseDao {
+    public static Connection create() throws Exception {
+        Class.forName("com.mysql.cj.jdbc.Driver");
+        Connection conn = DriverManager.getConnection("jdbc:mysql:///high-six-exam","root","root550011ROOT");
+        return conn;
+    }
+    public static void close(ResultSet rs, PreparedStatement ps,Connection conn) throws SQLException {
+        rs.close();
+        ps.close();
+        conn.close();
+    }
+    public static void close(PreparedStatement ps,Connection conn) throws SQLException {
+        ps.close();
+        conn.close();
+    }
+}