diff --git a/Chapter1/pom.xml b/Chapter1/pom.xml
deleted file mode 100755
index 2f235cc..0000000
--- a/Chapter1/pom.xml
+++ /dev/null
@@ -1,63 +0,0 @@
-<?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>com.didispace</groupId>
-	<artifactId>demo</artifactId>
-	<version>1.0.0</version>
-	<packaging>jar</packaging>
-
-	<name>demo</name>
-	<description>Spring Boot Web project</description>
-
-	<parent>
-		<groupId>org.springframework.boot</groupId>
-		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>1.3.2.RELEASE</version>
-		<relativePath/> <!-- lookup parent from repository -->
-	</parent>
-
-	<properties>
-		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<java.version>1.8</java.version>
-	</properties>
-
-	<dependencies>
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter</artifactId>
-		</dependency>
-
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-test</artifactId>
-			<scope>test</scope>
-		</dependency>
-
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-web</artifactId>
-		</dependency>
-
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-thymeleaf</artifactId>
-		</dependency>
-
-	</dependencies>
-	
-	<build>
-		<plugins>
-			<plugin>
-				<groupId>org.springframework.boot</groupId>
-				<artifactId>spring-boot-maven-plugin</artifactId>
-				<configuration>
-					<fork>true</fork>
-				</configuration>
-			</plugin>
-		</plugins>
-	</build>
-
-
-</project>
diff --git a/Chapter1/src/main/java/com/didispace/Application.java b/Chapter1/src/main/java/com/didispace/Application.java
deleted file mode 100755
index f7a9e16..0000000
--- a/Chapter1/src/main/java/com/didispace/Application.java
+++ /dev/null
@@ -1,22 +0,0 @@
-package com.didispace;
-
-import org.springframework.boot.SpringApplication;
-import org.springframework.boot.autoconfigure.SpringBootApplication;
-
-/**
- *
- * @author 程序猿DD
- * @version 1.0.0
- * @blog http://blog.didispace.com
- *
- */
-@SpringBootApplication
-public class Application {
-
-	public static void main(String[] args) {
-
-		SpringApplication.run(Application.class, args);
-
-	}
-
-}
diff --git a/Chapter1/src/main/java/com/didispace/web/HelloController.java b/Chapter1/src/main/java/com/didispace/web/HelloController.java
deleted file mode 100755
index 66b3ea7..0000000
--- a/Chapter1/src/main/java/com/didispace/web/HelloController.java
+++ /dev/null
@@ -1,29 +0,0 @@
-package com.didispace.web;
-
-import org.springframework.stereotype.Controller;
-import org.springframework.ui.ModelMap;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-/**
- *
- * @author 程序猿DD
- * @version 1.0.0
- * @blog http://blog.didispace.com
- *
- */
-@Controller
-public class HelloController {
-
-    @RequestMapping("/hello")
-    public String hello() {
-        return "Hello World";
-    }
-
-    @RequestMapping("/")
-    public String index(ModelMap map) {
-        map.addAttribute("host", "http://blog.didispace.com");
-        return "index";
-    }
-
-}
\ No newline at end of file
diff --git a/Chapter1/src/main/resources/application.properties b/Chapter1/src/main/resources/application.properties
deleted file mode 100755
index e69de29..0000000
diff --git a/Chapter1/src/main/resources/templates/index.html b/Chapter1/src/main/resources/templates/index.html
deleted file mode 100755
index 32cbfe8..0000000
--- a/Chapter1/src/main/resources/templates/index.html
+++ /dev/null
@@ -1,10 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head lang="en">
-    <meta charset="UTF-8" />
-    <title></title>
-</head>
-<body>
-<h1 th:text="${host}">Hello World</h1>
-</body>
-</html>
\ No newline at end of file
diff --git a/Chapter1/src/test/java/com/didispace/ApplicationTests.java b/Chapter1/src/test/java/com/didispace/ApplicationTests.java
deleted file mode 100755
index c5b2e60..0000000
--- a/Chapter1/src/test/java/com/didispace/ApplicationTests.java
+++ /dev/null
@@ -1,48 +0,0 @@
-package com.didispace;
-
-import com.didispace.web.HelloController;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.springframework.boot.test.SpringApplicationConfiguration;
-import org.springframework.http.MediaType;
-import org.springframework.mock.web.MockServletContext;
-import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
-import org.springframework.test.context.web.WebAppConfiguration;
-import org.springframework.test.web.servlet.MockMvc;
-import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
-import org.springframework.test.web.servlet.setup.MockMvcBuilders;
-
-import static org.hamcrest.Matchers.equalTo;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
-
-
-/**
- *
- * @author 程序猿DD
- * @version 1.0.0
- * @blog http://blog.didispace.com
- *
- */
-@RunWith(SpringJUnit4ClassRunner.class)
-@SpringApplicationConfiguration(classes = MockServletContext.class)
-@WebAppConfiguration
-public class ApplicationTests {
-
-	private MockMvc mvc;
-
-	@Before
-	public void setUp() throws Exception {
-		mvc = MockMvcBuilders.standaloneSetup(
-				new HelloController()).build();
-	}
-
-	@Test
-	public void getHello() throws Exception {
-		mvc.perform(MockMvcRequestBuilders.get("/hello").accept(MediaType.APPLICATION_JSON))
-				.andExpect(status().isOk())
-				.andExpect(content().string(equalTo("Hello World")));
-	}
-
-}
diff --git a/Chapter3-1-2/pom.xml b/Chapter3-1-2/pom.xml
deleted file mode 100755
index cc4e377..0000000
--- a/Chapter3-1-2/pom.xml
+++ /dev/null
@@ -1,55 +0,0 @@
-<?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>com.didispace</groupId>
-	<artifactId>Chapter1</artifactId>
-	<version>1.0.0</version>
-	<packaging>jar</packaging>
-
-	<name>Chapter1</name>
-	<description>The first Spring Boot project</description>
-
-	<parent>
-		<groupId>org.springframework.boot</groupId>
-		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>1.3.2.RELEASE</version>
-		<relativePath/> <!-- lookup parent from repository -->
-	</parent>
-
-	<properties>
-		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<java.version>1.8</java.version>
-	</properties>
-
-	<dependencies>
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter</artifactId>
-		</dependency>
-
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-test</artifactId>
-			<scope>test</scope>
-		</dependency>
-
-		<dependency>
-			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-web</artifactId>
-		</dependency>
-
-	</dependencies>
-	
-	<build>
-		<plugins>
-			<plugin>
-				<groupId>org.springframework.boot</groupId>
-				<artifactId>spring-boot-maven-plugin</artifactId>
-			</plugin>
-		</plugins>
-	</build>
-
-
-</project>
diff --git a/Chapter3-1-2/src/main/java/com/didispace/Chapter1Application.java b/Chapter3-1-2/src/main/java/com/didispace/Chapter1Application.java
deleted file mode 100755
index 6823281..0000000
--- a/Chapter3-1-2/src/main/java/com/didispace/Chapter1Application.java
+++ /dev/null
@@ -1,13 +0,0 @@
-package com.didispace;
-
-import org.springframework.boot.SpringApplication;
-import org.springframework.boot.autoconfigure.SpringBootApplication;
-
-@SpringBootApplication
-public class Chapter1Application {
-
-	public static void main(String[] args) {
-		SpringApplication.run(Chapter1Application.class, args);
-	}
-
-}
diff --git a/Chapter3-1-2/src/main/java/com/didispace/web/HelloController.java b/Chapter3-1-2/src/main/java/com/didispace/web/HelloController.java
deleted file mode 100755
index 9455485..0000000
--- a/Chapter3-1-2/src/main/java/com/didispace/web/HelloController.java
+++ /dev/null
@@ -1,14 +0,0 @@
-package com.didispace.web;
-
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
-
-@RestController
-public class HelloController {
-
-    @RequestMapping("/hello")
-    public String index() {
-        return "Hello World";
-    }
-
-}
\ No newline at end of file
diff --git a/Chapter3-1-2/src/main/resources/application.properties b/Chapter3-1-2/src/main/resources/application.properties
deleted file mode 100755
index e69de29..0000000
diff --git a/Chapter3-1-2/src/test/java/com/didispace/Chapter1ApplicationTests.java b/Chapter3-1-2/src/test/java/com/didispace/Chapter1ApplicationTests.java
deleted file mode 100755
index 0b5bfb0..0000000
--- a/Chapter3-1-2/src/test/java/com/didispace/Chapter1ApplicationTests.java
+++ /dev/null
@@ -1,40 +0,0 @@
-package com.didispace;
-
-import com.didispace.web.HelloController;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.springframework.boot.test.SpringApplicationConfiguration;
-import org.springframework.http.MediaType;
-import org.springframework.mock.web.MockServletContext;
-import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
-import org.springframework.test.context.web.WebAppConfiguration;
-import org.springframework.test.web.servlet.MockMvc;
-import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
-import org.springframework.test.web.servlet.setup.MockMvcBuilders;
-
-import static org.hamcrest.Matchers.equalTo;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
-import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
-
-
-@RunWith(SpringJUnit4ClassRunner.class)
-@SpringApplicationConfiguration(classes = MockServletContext.class)
-@WebAppConfiguration
-public class Chapter1ApplicationTests {
-
-	private MockMvc mvc;
-
-	@Before
-	public void setUp() throws Exception {
-		mvc = MockMvcBuilders.standaloneSetup(new HelloController()).build();
-	}
-
-	@Test
-	public void getHello() throws Exception {
-		mvc.perform(MockMvcRequestBuilders.get("/hello").accept(MediaType.APPLICATION_JSON))
-				.andExpect(status().isOk())
-				.andExpect(content().string(equalTo("Hello World")));
-	}
-
-}