diff --git a/chapter-4-spring-boot-validating-form-input/pom.xml b/chapter-4-spring-boot-validating-form-input/pom.xml
new file mode 100644
index 0000000..35ab84c
--- /dev/null
+++ b/chapter-4-spring-boot-validating-form-input/pom.xml
@@ -0,0 +1,90 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>spring.boot.core</groupId>
+    <artifactId>chapter-4-spring-boot-validating-form-input</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>chapter-4-spring-boot-validating-form-input</name>
+    <description>第四章表单校验案例</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.0.0.M4</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+
+    <dependencies>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-validation</artifactId>
+        </dependency>
+
+        <!-- Web 依赖 - 包含了 hibernate-validator 依赖-->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <!-- 单元测试依赖 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <!-- Spring Data JPA 依赖 :: 数据持久层框架 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-data-jpa</artifactId>
+        </dependency>
+
+        <!-- h2 数据源连接驱动 -->
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+
+        <!-- 模板引擎 Thymeleaf 依赖 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</artifactId>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <!-- Spring Boot Maven 插件 -->
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <version>1.5.1.RELEASE</version>
+            </plugin>
+        </plugins>
+    </build>
+
+    <repositories>
+        <repository>
+            <id>spring-milestones</id>
+            <name>Spring Milestones</name>
+            <url>https://repo.spring.io/libs-milestone</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </repository>
+    </repositories>
+
+</project>
diff --git a/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/ValidatingFormInputApplication.java b/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/ValidatingFormInputApplication.java
new file mode 100644
index 0000000..1825f04
--- /dev/null
+++ b/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/ValidatingFormInputApplication.java
@@ -0,0 +1,12 @@
+package spring.boot.core;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class ValidatingFormInputApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(ValidatingFormInputApplication.class, args);
+	}
+}
diff --git a/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/domain/User.java b/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/domain/User.java
new file mode 100644
index 0000000..535d3a5
--- /dev/null
+++ b/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/domain/User.java
@@ -0,0 +1,91 @@
+package spring.boot.core.domain;
+
+import org.hibernate.validator.constraints.NotEmpty;
+
+import javax.persistence.Entity;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.validation.constraints.Max;
+import javax.validation.constraints.Min;
+import javax.validation.constraints.NotNull;
+import javax.validation.constraints.Size;
+import java.io.Serializable;
+
+/**
+ * 用户实体类
+ * <p>
+ * Created by bysocket on 21/07/2017.
+ */
+@Entity
+public class User implements Serializable {
+
+    /**
+     * 编号
+     */
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    /**
+     * 名称
+     */
+    @NotEmpty(message = "姓名不能为空")
+    @Size(min = 2, max = 8, message = "姓名长度必须大于 2 且小于 20 字")
+    private String name;
+
+    /**
+     * 年龄
+     */
+    @NotNull(message = "年龄不能为空")
+    @Min(value = 0, message = "年龄大于 0")
+    @Max(value = 300, message = "年龄不大于 300")
+    private Integer age;
+
+    /**
+     * 出生时间
+     */
+    @NotEmpty(message = "出生时间不能为空")
+    private String birthday;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public Integer getAge() {
+        return age;
+    }
+
+    public void setAge(Integer age) {
+        this.age = age;
+    }
+
+    public String getBirthday() {
+        return birthday;
+    }
+
+    public void setBirthday(String birthday) {
+        this.birthday = birthday;
+    }
+
+    @Override
+    public String toString() {
+        return "User{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", age=" + age +
+                ", birthday=" + birthday +
+                '}';
+    }
+}
diff --git a/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/domain/UserRepository.java b/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/domain/UserRepository.java
new file mode 100644
index 0000000..6e40f4a
--- /dev/null
+++ b/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/domain/UserRepository.java
@@ -0,0 +1,12 @@
+package spring.boot.core.domain;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+/**
+ * 用户持久层操作接口
+ *
+ * Created by bysocket on 21/07/2017.
+ */
+public interface UserRepository extends JpaRepository<User, Long> {
+
+}
diff --git a/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/service/UserService.java b/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/service/UserService.java
new file mode 100644
index 0000000..8111e6f
--- /dev/null
+++ b/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/service/UserService.java
@@ -0,0 +1,24 @@
+package spring.boot.core.service;
+
+
+import spring.boot.core.domain.User;
+
+import java.util.List;
+
+/**
+ * User 业务层接口
+ *
+ * Created by bysocket on 24/07/2017.
+ */
+public interface UserService {
+
+    List<User> findAll();
+
+    User insertByUser(User user);
+
+    User update(User user);
+
+    User delete(Long id);
+
+    User findById(Long id);
+}
diff --git a/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/service/impl/UserServiceImpl.java b/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/service/impl/UserServiceImpl.java
new file mode 100644
index 0000000..9da3385
--- /dev/null
+++ b/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/service/impl/UserServiceImpl.java
@@ -0,0 +1,57 @@
+package spring.boot.core.service.impl;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+import spring.boot.core.domain.User;
+import spring.boot.core.domain.UserRepository;
+import spring.boot.core.service.UserService;
+
+import java.util.List;
+
+/**
+ * User 业务层实现
+ *
+ * Created by bysocket on 24/07/2017.
+ */
+@Service
+public class UserServiceImpl implements UserService {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(UserServiceImpl.class);
+
+    @Autowired
+    UserRepository userRepository;
+
+    @Override
+    public List<User> findAll() {
+        return userRepository.findAll();
+    }
+
+    @Override
+    public User insertByUser(User user) {
+        LOGGER.info("新增用户：" + user.toString());
+        return userRepository.save(user);
+    }
+
+    @Override
+    public User update(User user) {
+        LOGGER.info("更新用户：" + user.toString());
+        return userRepository.save(user);
+    }
+
+    @Override
+    public User delete(Long id) {
+        User user = userRepository.findById(id).get();
+        userRepository.delete(user);
+
+        LOGGER.info("删除用户：" + user.toString());
+        return user;
+    }
+
+    @Override
+    public User findById(Long id) {
+        LOGGER.info("获取用户 ID ：" + id);
+        return userRepository.findById(id).get();
+    }
+}
diff --git a/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/web/UserController.java b/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/web/UserController.java
new file mode 100644
index 0000000..3eb0360
--- /dev/null
+++ b/chapter-4-spring-boot-validating-form-input/src/main/java/spring/boot/core/web/UserController.java
@@ -0,0 +1,112 @@
+package spring.boot.core.web;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.ModelMap;
+import org.springframework.validation.BindingResult;
+import org.springframework.web.bind.annotation.ModelAttribute;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import spring.boot.core.domain.User;
+import spring.boot.core.service.UserService;
+
+import javax.validation.Valid;
+
+/**
+ * 用户控制层
+ *
+ * Created by bysocket on 24/07/2017.
+ */
+@Controller
+@RequestMapping(value = "/users")     // 通过这里配置使下面的映射都在 /users
+public class UserController {
+
+    @Autowired
+    UserService userService;          // 用户服务层
+
+    /**
+     *  获取用户列表
+     *    处理 "/users" 的 GET 请求，用来获取用户列表
+     *    通过 @RequestParam 传递参数，进一步实现条件查询或者分页查询
+     */
+    @RequestMapping(method = RequestMethod.GET)
+    public String getUserList(ModelMap map) {
+        map.addAttribute("userList", userService.findAll());
+        return "userList";
+    }
+
+    /**
+     * 显示创建用户表单
+     *
+     * @param map
+     * @return
+     */
+    @RequestMapping(value = "/create", method = RequestMethod.GET)
+    public String createUserForm(ModelMap map) {
+        map.addAttribute("user", new User());
+        map.addAttribute("action", "create");
+        return "userForm";
+    }
+
+    /**
+     *  创建用户
+     *    处理 "/users" 的 POST 请求，用来获取用户列表
+     *    通过 @ModelAttribute 绑定参数，也通过 @RequestParam 从页面中传递参数
+     */
+    @RequestMapping(value = "/create", method = RequestMethod.POST)
+    public String postUser(ModelMap map,
+                           @ModelAttribute @Valid User user,
+                           BindingResult bindingResult) {
+
+        if (bindingResult.hasErrors()) {
+            map.addAttribute("action", "create");
+            return "userForm";
+        }
+
+        userService.insertByUser(user);
+
+        return "redirect:/users/";
+    }
+
+
+    /**
+     * 显示需要更新用户表单
+     *    处理 "/users/{id}" 的 GET 请求，通过 URL 中的 id 值获取 User 信息
+     *    URL 中的 id ，通过 @PathVariable 绑定参数
+     */
+    @RequestMapping(value = "/update/{id}", method = RequestMethod.GET)
+    public String getUser(@PathVariable Long id, ModelMap map) {
+        map.addAttribute("user", userService.findById(id));
+        map.addAttribute("action", "update");
+        return "userForm";
+    }
+
+    /**
+     * 处理 "/users/{id}" 的 PUT 请求，用来更新 User 信息
+     *
+     */
+    @RequestMapping(value = "/update", method = RequestMethod.POST)
+    public String putUser(ModelMap map,
+                          @ModelAttribute @Valid User user,
+                          BindingResult bindingResult) {
+
+        if (bindingResult.hasErrors()) {
+            map.addAttribute("action", "update");
+            return "userForm";
+        }
+
+        userService.update(user);
+        return "redirect:/users/";
+    }
+
+    /**
+     * 处理 "/users/{id}" 的 GET 请求，用来删除 User 信息
+     */
+    @RequestMapping(value = "/delete/{id}", method = RequestMethod.GET)
+    public String deleteUser(@PathVariable Long id) {
+
+        userService.delete(id);
+        return "redirect:/users/";
+    }
+}
\ No newline at end of file
diff --git a/chapter-4-spring-boot-validating-form-input/src/main/resources/application.properties b/chapter-4-spring-boot-validating-form-input/src/main/resources/application.properties
new file mode 100644
index 0000000..51350c6
--- /dev/null
+++ b/chapter-4-spring-boot-validating-form-input/src/main/resources/application.properties
@@ -0,0 +1,2 @@
+## 是否显示 SQL 语句
+spring.jpa.show-sql=true
\ No newline at end of file
diff --git a/chapter-4-spring-boot-validating-form-input/src/main/resources/static/css/default.css b/chapter-4-spring-boot-validating-form-input/src/main/resources/static/css/default.css
new file mode 100755
index 0000000..4da3051
--- /dev/null
+++ b/chapter-4-spring-boot-validating-form-input/src/main/resources/static/css/default.css
@@ -0,0 +1,2 @@
+/* contentDiv */
+.contentDiv {padding:20px 60px;}
\ No newline at end of file
diff --git a/chapter-4-spring-boot-validating-form-input/src/main/resources/static/images/favicon.ico b/chapter-4-spring-boot-validating-form-input/src/main/resources/static/images/favicon.ico
new file mode 100755
index 0000000..e5a2934
Binary files /dev/null and b/chapter-4-spring-boot-validating-form-input/src/main/resources/static/images/favicon.ico differ
diff --git a/chapter-4-spring-boot-validating-form-input/src/main/resources/templates/userForm.html b/chapter-4-spring-boot-validating-form-input/src/main/resources/templates/userForm.html
new file mode 100644
index 0000000..f60c4e0
--- /dev/null
+++ b/chapter-4-spring-boot-validating-form-input/src/main/resources/templates/userForm.html
@@ -0,0 +1,58 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+    <head>
+        <script type="text/javascript" th:src="@{https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js}"></script>
+        <link th:href="@{https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css}" rel="stylesheet"/>
+        <link th:href="@{/css/default.css}" rel="stylesheet"/>
+        <link rel="icon" th:href="@{/images/favicon.ico}" type="image/x-icon"/>
+        <meta charset="UTF-8"/>
+        <title>用户管理</title>
+    </head>
+
+    <body>
+        <div class="contentDiv">
+
+            <h5> 《 Spring Boot 2.x 核心技术实战》第二章快速入门案例</h5>
+
+            <legend>
+                <strong>用户管理</strong>
+            </legend>
+
+            <form th:action="@{/users/{action}(action=${action})}" method="post" class="form-horizontal">
+
+                <input type="hidden" name="id" th:value="${user.id}"/>
+
+                <div class="form-group">
+                    <label for="user_name" class="col-sm-2 control-label">名称:</label>
+                    <div class="col-xs-4">
+                        <input type="text" class="form-control" id="user_name" name="name" th:value="${user.name}" th:field="*{user.name}" />
+                    </div>
+                    <label class="col-sm-2 control-label text-danger" th:if="${#fields.hasErrors('user.name')}" th:errors="*{user.name}">姓名有误!</label>
+                </div>
+
+                <div class="form-group">
+                    <label for="user_age" class="col-sm-2 control-label">年龄:</label>
+                    <div class="col-xs-4">
+                        <input type="text" class="form-control" id="user_age" name="age" th:value="${user.age}" th:field="*{user.age}" />
+                    </div>
+                    <label class="col-sm-2 control-label text-danger" th:if="${#fields.hasErrors('user.age')}" th:errors="*{user.age}">年龄有误!</label>
+                </div>
+
+                <div class="form-group">
+                    <label for="user_birthday" class="col-sm-2 control-label">出生日期:</label>
+                    <div class="col-xs-4">
+                        <input type="date" class="form-control" id="user_birthday" name="birthday" th:value="${user.birthday}" th:field="*{user.birthday}"/>
+                    </div>
+                    <label class="col-sm-2 control-label text-danger" th:if="${#fields.hasErrors('user.birthday')}" th:errors="*{user.birthday}">生日有误!</label>
+                </div>
+
+                <div class="form-group">
+                    <div class="col-sm-offset-2 col-sm-10">
+                        <input class="btn btn-primary" type="submit" value="提交"/>&nbsp;&nbsp;
+                        <input class="btn" type="button" value="返回" onclick="history.back()"/>
+                    </div>
+                </div>
+            </form>
+        </div>
+    </body>
+</html>
\ No newline at end of file
diff --git a/chapter-4-spring-boot-validating-form-input/src/main/resources/templates/userList.html b/chapter-4-spring-boot-validating-form-input/src/main/resources/templates/userList.html
new file mode 100644
index 0000000..3d680f1
--- /dev/null
+++ b/chapter-4-spring-boot-validating-form-input/src/main/resources/templates/userList.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+    <head>
+        <script type="text/javascript" th:src="@{https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js}"></script>
+        <link th:href="@{https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css}" rel="stylesheet"/>
+        <link th:href="@{/css/default.css}" rel="stylesheet"/>
+        <link rel="icon" th:href="@{/images/favicon.ico}" type="image/x-icon"/>
+        <meta charset="UTF-8"/>
+        <title>用户列表</title>
+    </head>
+
+    <body>
+
+        <div class="contentDiv">
+
+            <h5> 《 Spring Boot 2.x 核心技术实战》第二章快速入门案例</h5>
+
+            <table class="table table-hover table-condensed">
+                <legend>
+                    <strong>用户列表</strong>
+                </legend>
+                <thead>
+                    <tr>
+                        <th>用户编号</th>
+                        <th>名称</th>
+                        <th>年龄</th>
+                        <th>出生时间</th>
+                        <th>管理</th>
+                    </tr>
+                </thead>
+                <tbody>
+                    <tr th:each="user : ${userList}">
+                        <th scope="row" th:text="${user.id}"></th>
+                        <td><a th:href="@{/users/update/{userId}(userId=${user.id})}" th:text="${user.name}"></a></td>
+                        <td th:text="${user.age}"></td>
+                        <td th:text="${user.birthday}"></td>
+                        <td><a class="btn btn-danger" th:href="@{/users/delete/{userId}(userId=${user.id})}">删除</a></td>
+                    </tr>
+                </tbody>
+            </table>
+
+            <div><a class="btn btn-primary" href="/users/create" role="button">创建用户</a></div>
+        </div>
+
+    </body>
+</html>
\ No newline at end of file
diff --git a/chapter-4-spring-boot-validating-form-input/src/test/java/spring/boot/core/ValidatingFormInputApplicationTests.java b/chapter-4-spring-boot-validating-form-input/src/test/java/spring/boot/core/ValidatingFormInputApplicationTests.java
new file mode 100644
index 0000000..a8c5570
--- /dev/null
+++ b/chapter-4-spring-boot-validating-form-input/src/test/java/spring/boot/core/ValidatingFormInputApplicationTests.java
@@ -0,0 +1,16 @@
+package spring.boot.core;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class ValidatingFormInputApplicationTests {
+
+	@Test
+	public void contextLoads() {
+	}
+
+}