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2
examples/chapter05/spring-boot-web-demo/settings.gradle
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rootProject.name = 'spring-boot-application' rootProject.name = 'spring-boot-web-demo'

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examples/chapter06/spring-boot-jpa-demo/.gitignore vendored Normal file
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.gradle
build/
!gradle/wrapper/gradle-wrapper.jar
!**/src/main/**/build/
!**/src/test/**/build/
### IntelliJ IDEA ###
.idea/modules.xml
.idea/jarRepositories.xml
.idea/compiler.xml
.idea/libraries/
*.iws
*.iml
*.ipr
out/
!**/src/main/**/out/
!**/src/test/**/out/
### Eclipse ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache
bin/
!**/src/main/**/bin/
!**/src/test/**/bin/
### NetBeans ###
/nbproject/private/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/
### VS Code ###
.vscode/
### Mac OS ###
.DS_Store

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examples/chapter06/spring-boot-jpa-demo/build.gradle Normal file
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plugins {
id 'java'
id 'org.springframework.boot' version '3.3.5'
id 'io.spring.dependency-management' version '1.1.6'
}
group = 'com.lk.demo'
version = '1.0-SNAPSHOT'
java {
toolchain {
languageVersion = JavaLanguageVersion.of(17)
}
}
repositories {
mavenLocal()
maven { url 'https://mirrors.cloud.tencent.com/nexus/repository/maven-public/' }
maven { url 'https://maven.aliyun.com/repository/central' }
maven { url 'https://maven.aliyun.com/repository/public' }
mavenCentral()
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter-web'
runtimeOnly 'com.mysql:mysql-connector-j'
implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
testImplementation platform('org.junit:junit-bom:5.10.0')
testImplementation 'org.junit.jupiter:junit-jupiter'
}
test {
useJUnitPlatform()
}

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examples/chapter06/spring-boot-jpa-demo/gradle/wrapper/gradle-wrapper.jar vendored Normal file
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examples/chapter06/spring-boot-jpa-demo/gradle/wrapper/gradle-wrapper.properties vendored Normal file
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#Sat Oct 26 17:29:35 CST 2024
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-8.8-bin.zip
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists

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examples/chapter06/spring-boot-jpa-demo/gradlew vendored Normal file
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#!/bin/sh
#
# Copyright © 2015-2021 the original authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
##############################################################################
#
# Gradle start up script for POSIX generated by Gradle.
#
# Important for running:
#
# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
# noncompliant, but you have some other compliant shell such as ksh or
# bash, then to run this script, type that shell name before the whole
# command line, like:
#
# ksh Gradle
#
# Busybox and similar reduced shells will NOT work, because this script
# requires all of these POSIX shell features:
# * functions;
# * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
# «${var#prefix}», «${var%suffix}», and «$( cmd )»;
# * compound commands having a testable exit status, especially «case»;
# * various built-in commands including «command», «set», and «ulimit».
#
# Important for patching:
#
# (2) This script targets any POSIX shell, so it avoids extensions provided
# by Bash, Ksh, etc; in particular arrays are avoided.
#
# The "traditional" practice of packing multiple parameters into a
# space-separated string is a well documented source of bugs and security
# problems, so this is (mostly) avoided, by progressively accumulating
# options in "$@", and eventually passing that to Java.
#
# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
# see the in-line comments for details.
#
# There are tweaks for specific operating systems such as AIX, CygWin,
# Darwin, MinGW, and NonStop.
#
# (3) This script is generated from the Groovy template
# https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
# within the Gradle project.
#
# You can find Gradle at https://github.com/gradle/gradle/.
#
##############################################################################
# Attempt to set APP_HOME
# Resolve links: $0 may be a link
app_path=$0
# Need this for daisy-chained symlinks.
while
APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path
[ -h "$app_path" ]
do
ls=$( ls -ld "$app_path" )
link=${ls#*' -> '}
case $link in #(
/*) app_path=$link ;; #(
*) app_path=$APP_HOME$link ;;
esac
done
APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
APP_NAME="Gradle"
APP_BASE_NAME=${0##*/}
# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD=maximum
warn () {
echo "$*"
} >&2
die () {
echo
echo "$*"
echo
exit 1
} >&2
# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
nonstop=false
case "$( uname )" in #(
CYGWIN* ) cygwin=true ;; #(
Darwin* ) darwin=true ;; #(
MSYS* | MINGW* ) msys=true ;; #(
NONSTOP* ) nonstop=true ;;
esac
CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD=$JAVA_HOME/jre/sh/java
else
JAVACMD=$JAVA_HOME/bin/java
fi
if [ ! -x "$JAVACMD" ] ; then
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
else
JAVACMD=java
which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
# Increase the maximum file descriptors if we can.
if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
case $MAX_FD in #(
max*)
MAX_FD=$( ulimit -H -n ) ||
warn "Could not query maximum file descriptor limit"
esac
case $MAX_FD in #(
'' | soft) :;; #(
*)
ulimit -n "$MAX_FD" ||
warn "Could not set maximum file descriptor limit to $MAX_FD"
esac
fi
# Collect all arguments for the java command, stacking in reverse order:
# * args from the command line
# * the main class name
# * -classpath
# * -D...appname settings
# * --module-path (only if needed)
# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
# For Cygwin or MSYS, switch paths to Windows format before running java
if "$cygwin" || "$msys" ; then
APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
JAVACMD=$( cygpath --unix "$JAVACMD" )
# Now convert the arguments - kludge to limit ourselves to /bin/sh
for arg do
if
case $arg in #(
-*) false ;; # don't mess with options #(
/?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath
[ -e "$t" ] ;; #(
*) false ;;
esac
then
arg=$( cygpath --path --ignore --mixed "$arg" )
fi
# Roll the args list around exactly as many times as the number of
# args, so each arg winds up back in the position where it started, but
# possibly modified.
#
# NB: a `for` loop captures its iteration list before it begins, so
# changing the positional parameters here affects neither the number of
# iterations, nor the values presented in `arg`.
shift # remove old arg
set -- "$@" "$arg" # push replacement arg
done
fi
# Collect all arguments for the java command;
# * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
# shell script including quotes and variable substitutions, so put them in
# double quotes to make sure that they get re-expanded; and
# * put everything else in single quotes, so that it's not re-expanded.
set -- \
"-Dorg.gradle.appname=$APP_BASE_NAME" \
-classpath "$CLASSPATH" \
org.gradle.wrapper.GradleWrapperMain \
"$@"
# Use "xargs" to parse quoted args.
#
# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
#
# In Bash we could simply go:
#
# readarray ARGS < <( xargs -n1 <<<"$var" ) &&
# set -- "${ARGS[@]}" "$@"
#
# but POSIX shell has neither arrays nor command substitution, so instead we
# post-process each arg (as a line of input to sed) to backslash-escape any
# character that might be a shell metacharacter, then use eval to reverse
# that process (while maintaining the separation between arguments), and wrap
# the whole thing up as a single "set" statement.
#
# This will of course break if any of these variables contains a newline or
# an unmatched quote.
#
eval "set -- $(
printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
xargs -n1 |
sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
tr '\n' ' '
)" '"$@"'
exec "$JAVACMD" "$@"

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examples/chapter06/spring-boot-jpa-demo/gradlew.bat vendored Normal file
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@rem
@rem Copyright 2015 the original author or authors.
@rem
@rem Licensed under the Apache License, Version 2.0 (the "License");
@rem you may not use this file except in compliance with the License.
@rem You may obtain a copy of the License at
@rem
@rem https://www.apache.org/licenses/LICENSE-2.0
@rem
@rem Unless required by applicable law or agreed to in writing, software
@rem distributed under the License is distributed on an "AS IS" BASIS,
@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@rem See the License for the specific language governing permissions and
@rem limitations under the License.
@rem
@if "%DEBUG%" == "" @echo off
@rem ##########################################################################
@rem
@rem Gradle startup script for Windows
@rem
@rem ##########################################################################
@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal
set DIRNAME=%~dp0
if "%DIRNAME%" == "" set DIRNAME=.
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%
@rem Resolve any "." and ".." in APP_HOME to make it shorter.
for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome
set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if "%ERRORLEVEL%" == "0" goto execute
echo.
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe
if exist "%JAVA_EXE%" goto execute
echo.
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:execute
@rem Setup the command line
set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
:end
@rem End local scope for the variables with windows NT shell
if "%ERRORLEVEL%"=="0" goto mainEnd
:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
exit /b 1
:mainEnd
if "%OS%"=="Windows_NT" endlocal
:omega

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examples/chapter06/spring-boot-jpa-demo/settings.gradle Normal file
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rootProject.name = 'spring-boot-jpa-demo'

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examples/chapter06/spring-boot-jpa-demo/src/main/java/com/lk/demo/JdbcCrudExample.java Normal file
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package com.lk.demo;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class JdbcCrudExample {
private static final String DB_URL = "jdbc:mysql://localhost:3306/paopao";
private static final String USER = "root";
private static final String PASS = "root";
public static void main(String[] args) {
Connection conn = null;
try {
// 加载MySQL驱动
Class.forName("com.mysql.cj.jdbc.Driver");
// 获取数据库连接
conn = DriverManager.getConnection(DB_URL, USER, PASS);
// 创建表
createTable(conn);
// 插入记录
insertUser(conn, "Alice", 28);
insertUser(conn, "Bob", 32);
// 查询记录
queryUsers(conn);
// 更新记录
updateUser(conn, "Alice", 29);
// 删除记录
deleteUser(conn, "Bob");
// 再次查询记录
queryUsers(conn);
} catch (ClassNotFoundException | SQLException e) {
e.printStackTrace();
} finally {
if (conn != null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
private static void createTable(Connection conn) throws SQLException {
String sql = "CREATE TABLE IF NOT EXISTS users (" +
"id INT AUTO_INCREMENT PRIMARY KEY," +
"name VARCHAR(255) NOT NULL," +
"age INT)";
PreparedStatement stmt = conn.prepareStatement(sql);
stmt.executeUpdate();
stmt.close();
}
private static void insertUser(Connection conn, String name, int age) throws SQLException {
String sql = "INSERT INTO users (name, age) VALUES (?, ?)";
PreparedStatement pstmt = conn.prepareStatement(sql);
pstmt.setString(1, name);
pstmt.setInt(2, age);
pstmt.executeUpdate();
pstmt.close();
}
private static void queryUsers(Connection conn) throws SQLException {
String sql = "SELECT * FROM users";
PreparedStatement pstmt = conn.prepareStatement(sql);
ResultSet rs = pstmt.executeQuery();
while (rs.next()) {
int id = rs.getInt("id");
String name = rs.getString("name");
int age = rs.getInt("age");
System.out.println("ID: " + id + ", Name: " + name + ", Age: " + age);
}
rs.close();
pstmt.close();
}
private static void updateUser(Connection conn, String name, int age) throws SQLException {
String sql = "UPDATE users SET age = ? WHERE name = ?";
PreparedStatement pstmt = conn.prepareStatement(sql);
pstmt.setInt(1, age);
pstmt.setString(2, name);
int rowsUpdated = pstmt.executeUpdate();
System.out.println(rowsUpdated + " row(s) updated.");
pstmt.close();
}
private static void deleteUser(Connection conn, String name) throws SQLException {
String sql = "DELETE FROM users WHERE name = ?";
PreparedStatement pstmt = conn.prepareStatement(sql);
pstmt.setString(1, name);
int rowsDeleted = pstmt.executeUpdate();
System.out.println(rowsDeleted + " row(s) deleted.");
pstmt.close();
}
}

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examples/chapter06/spring-boot-jpa-demo/src/main/java/com/lk/demo/MyWebApplication.java Normal file
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package com.lk.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.AutoConfiguration;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class MyWebApplication {
public static void main(String[] args) {
SpringApplication.run(MyWebApplication.class, args);
}
}

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examples/chapter06/spring-boot-jpa-demo/src/main/java/com/lk/demo/User.java Normal file
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package com.lk.demo;
public class User {
private Long id;
private String name;
private String password;
private String email;
private String phone;
private Integer age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}

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examples/chapter06/spring-boot-jpa-demo/src/main/java/com/lk/demo/UserController.java Normal file
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package com.lk.demo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.ArrayList;
import java.util.List;
@RestController
@RequestMapping("/users")
public class UserController {
@Autowired
UserService userService;
/**
* 获取指定ID的用户信息
* Method: GET
* URL: /users/{id}
* 输入参数:
* - @PathVariable Long id: 用户ID
* 返回数据结构:
* - User对象，包含id, name, age
*/
@GetMapping("/{id}")
public User getUser(@PathVariable Long id){
System.out.println("Got id from http request: " + id);
return userService.getUser(id);
}
/**
* 根据名称分页查询用户列表
* Method: GET
* URL: /users?name={name}&page={page}&pageSize={pageSize}
* 输入参数:
* - @RequestParam String name: 用户名称
* - @RequestParam int page: 当前页码
* - @RequestParam int pageSize: 每页大小
* 返回数据结构:
* - List<User> 用户列表，每个User对象包含id, name, age
*/
@GetMapping("")
public List<User> findUsers(@RequestParam("name") String name, @RequestParam int page, @RequestParam int pageSize){
System.out.println("Got name: " + name+ " page: " + page+ " pageSize: " + pageSize);
return userService.queryUsers();
}
/**
* 创建新用户
* Method: POST
* URL: /users
* 输入参数:
* - @RequestBody User user: 用户对象，包含name, age, password,email
* 返回数据结构:
* - User对象，包含id, name, age, password,email
*/
@PostMapping
public User createUser(@RequestBody User user){
System.out.println("Got name: "+user.getName()+ "pass:" +user.getPassword());
return userService.createUser(user);
}
/**
* 更新指定ID的用户信息
* Method: PUT
* URL: /users/{id}
* 输入参数:
* - @PathVariable Long id: 用户ID
* - @RequestBody User user: 用户对象，包含name, age, password
* 返回数据结构:
* - User对象，包含id, name, age, password
*/
@PutMapping("/{id}")
public User updateUser(@PathVariable Long id, @RequestBody User user){
System.out.println("Got id: "+id+ "name: "+user.getName()+ " pass:" +user.getPassword()+" age: "+user.getAge());
return userService.updateUser(id, user);
}
/**
* 删除指定ID的用户
* Method: DELETE
* URL: /users/{id}
* 输入参数:
* - @PathVariable Long id: 用户ID
* 返回数据结构:
* - String "ok" 表示删除成功
*/
@DeleteMapping("/{id}")
public String deleteUser(@PathVariable Long id){
System.out.println("delete id: "+id);
return "ok";
}
}

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examples/chapter06/spring-boot-jpa-demo/src/main/java/com/lk/demo/UserService.java Normal file
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package com.lk.demo;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import java.util.ArrayList;
import java.util.List;
@Service
public class UserService {
public User getUser(Long id){
User user = new User();
user.setId(id);
user.setName("lk");
user.setAge(18);
return user;
}
public List<User> queryUsers(){
List<User> users = new ArrayList<>();
User u1 = new User();
u1.setName("John");
u1.setEmail("john@gmail.com");
u1.setPhone("123456789");
users.add(u1);
User u2 = new User();
u2.setName("Mike");
u2.setEmail("mike@gmail.com");
u2.setPhone("123456789");
users.add(u2);
return users;
}
public User createUser(User user){
user.setId(22L);
return user;
}
public User updateUser(Long id, User user){
user.setId(id);
return user;
}
}

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examples/chapter06/spring-boot-jpa-demo/src/main/resources/application.yml Normal file
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spring:
jackson:
property-naming-strategy: SNAKE_CASE # 驼峰转下划线
datasource:
url: jdbc:mysql://localhost:3306/paopao?useSSL=false&serverTimezone=UTC&allowPublicKeyRetrieval=true # MySQL连接URL，paopao是数据库名
driverClassName: com.mysql.cj.jdbc.Driver # MySQL的Driver类名
username: root # MySQL用户名
password: root # MySQL密码
jpa:
show-sql: true
open-in-view: false
defer-datasource-initialization: true
database-platform: org.hibernate.dialect.MySQL8Dialect # 修改为MySQL的Dialect
hibernate:
ddl-auto: update # 根据需要调整，update适用于开发和某些生产环境
format_sql: true # 保持原样，用于格式化SQL输出