我的Grails的环境是
grails -v
-| Grails Version: 3.2.6
-| Groovy Version: 2.4.7
-| JVM Version: 1.8.0_71
-Java世界里构建项目用什么工具呢，ant，maven和gradle。maven非常流行， +原因无非是maven仓库和项目架构的约定。但是ant构建过程更加容易理解， +因为ant展示了所有的操作。gradle拥有基于groovy语言的DSL语言且继承了 +maven仓库的思想所以笔者认为未来是属于gradle的。
-grails 3.2.6是用gradle进行构建的。所以如果要添加java类，
-就需要修改build.gradle。
第一步
创建src/main/java目录。对于com.yanggeorge.XMLtest类，
-则要创建src/main/java/com/yanggeorge/目录，并把XMLtest.java放在该
-路径下。
第二步
在build.gradle文件中添加如下代码
|
第三步
编译XMLtest.java。可以用grails compile进行编译。
D:\work\grails>grails compile
-:compileJava UP-TO-DATE
-:compileGroovy UP-TO-DATE
-:buildProperties
-:processResources UP-TO-DATE
-:classes UP-TO-DATE
-
-BUILD SUCCESSFUL
-
-Total time: 23.638 secs
-D:\work\grails>
+特别是最近在搭建springmvc-jpa-mysql开发框架的时候，发现怎么也找不到一个
+archetype可以做到一键构建demo project。
+ 何谓一键构建
何谓一键构建呢，有人用maven也可以很快搭建一个，通常可以把之前的
+项目复制一份修改一下，似乎没有那么麻烦。但笔者还是觉得执行几个命令，
+回车一下就构建完成，更加让人舒心。如图所示，创建一个空项目dir，然后把build.gradle
+放入该路径下，执行
+gradle init
+gradle build -x test
+gradle run
- 第四步
修改grails-app/conf/spring/resources.groovy
-import com.yanggeorge.XMLtest
beans = {
myXMLtest(XMLtest)
}
-
- 第五步
已经可以使用myXMLtest了，例如创建一个service，grails-app/services/rss/RssService.groovy
-第６行就是依赖注入的bean。
-import grails.transaction.Transactional
@Transactional
class RssService {
def myXMLtest
def serviceMethod(String url, String keyword) {
def items = myXMLtest.getAllItems(url)
}
}
-
+就可以在浏览器里访问http://localhost:8080/greeting?name=GoodJob链接了。
+以下是过程展示。当然了因为jar包都已经下载过了，所以似乎还比较快。
+否则的话一定会联网下载jar包的。
+
+以下导入IDEA中后所示的文件结构。
+
+ build.gradle文件内容
build.gradle构建基于spring-boot的springmvc-jpa-mysql框架demo项目的脚本如下。
+该脚本一目了然，无需赘述。
+def createFile = { String path, String content ->
File f = file(path)
if (f.exists()) {
f.delete()
}
f.withWriter("UTF-8") { writer ->
writer.write(content)
}
}
task init(type: InitBuild, dependsOn : ["bak-build-file", "create-dirs", "create-files"]) {
doLast {
String buildGradleContent = '''
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:1.5.2.RELEASE")
}
}
apply plugin: 'java\'
apply plugin: 'eclipse\'
apply plugin: 'idea\'
apply plugin: 'application\'
apply plugin: 'org.springframework.boot\'
jar {
baseName = 'spring-boot-demo\'
version = '0.1.0\'
}
repositories {
mavenCentral()
}
sourceCompatibility = 1.8
targetCompatibility = 1.8
dependencies {
compile("org.springframework.boot:spring-boot-starter-web") {
exclude module: "spring-boot-starter-tomcat"
}
compile("org.springframework.boot:spring-boot-starter-jetty")
compile("org.springframework.boot:spring-boot-starter-actuator")
compile("org.springframework.boot:spring-boot-starter-thymeleaf")
compile("org.springframework.boot:spring-boot-starter-data-jpa")
compile("org.springframework.boot:spring-boot-devtools")
compile("mysql:mysql-connector-java")
compile("org.apache.commons:commons-lang3:3.5")
testCompile("junit:junit")
testCompile("org.springframework.boot:spring-boot-starter-test")
}
mainClassName = "hello.Application"
'''
createFile("build.gradle", buildGradleContent)
}
}
task "bak-build-file"(type: Copy) {
from "build.gradle"
into "build.gradle.bak"
}
task "create-dirs" {
description "create spring-boot-jpa-test project dirs."
doLast {
file("src/main/java/hello").mkdirs()
file("src/main/resources/templates").mkdirs()
file("src/main/webapp/WEB-INF/classes").mkdirs()
file("src/test/java/hello").mkdirs()
file("src/test/resources").mkdirs()
}
}
task "create-files" {
description "create spring-boot-jpa-test related files."
doLast {
String ApplicationContent, HelloControllerContent, UserRepositoryContent, UserContent, GreetingControllerContent
String ApplicationTestsContent, ServletInitializerContent, HelloControllerTestContent
String applicationPropertiesContent
String webXmlContent, indexJspContent, greetingHtmlContent
ApplicationContent = '''
package hello;
import java.util.Arrays;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
@Bean
public CommandLineRunner commandLineRunner(ApplicationContext ctx) {
return args -> {
System.out.println("Let's inspect the beans provided by Spring Boot:");
String[] beanNames = ctx.getBeanDefinitionNames();
Arrays.sort(beanNames);
for (String beanName : beanNames) {
//System.out.println(beanName);
}
};
}
}
'''
HelloControllerContent = '''
package hello;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.bind.annotation.RequestMapping;
@RestController
public class HelloController {
@RequestMapping("/")
public String index() {
return "Greetings from Spring Boot!";
}
}
'''
UserRepositoryContent = '''
package hello;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;
/**
* Created by YM on 5/16/2017.
*/
public interface UserRepository extends JpaRepository<User, Long> {
User findByName(String name);
User findByNameAndAge(String name, Integer age);
@Query("from User u where u.name=:name")
User findUser(@Param("name") String name);
}
'''
UserContent = '''
package hello;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
/**
* Created by YM on 5/16/2017.
*/
@Entity
public class User {
@Id
@GeneratedValue
private Long id;
@Column(nullable = false)
private String name;
@Column(nullable = false)
private Integer age;
public User() {
}
public User(String name, int age) {
this.name = name;
this.age = age;
}
public Integer getAge() {
return age;
}
public String getName() {
return name;
}
public Long getId() {
return id;
}
public void setAge(Integer age) {
this.age = age;
}
public void setId(Long id) {
this.id = id;
}
public void setName(String name) {
this.name = name;
}
}
'''
ApplicationTestsContent = '''
import hello.Application;
import hello.User;
import hello.UserRepository;
import java.util.Date;
import org.apache.commons.lang3.time.DateUtils;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.junit4.SpringRunner;
/**
* Created by YM on 5/16/2017.
*/
@RunWith(SpringRunner.class)
@SpringBootTest(classes = Application.class)
public class ApplicationTests {
@Autowired
private UserRepository userRepository;
@Test
public void test() throws Exception {
// 创建10条记录
userRepository.save(new User("AAA", 10));
userRepository.save(new User("BBB", 20));
userRepository.save(new User("CCC", 30));
userRepository.save(new User("DDD", 40));
userRepository.save(new User("EEE", 50));
userRepository.save(new User("FFF", 60));
userRepository.save(new User("GGG", 70));
userRepository.save(new User("HHH", 80));
userRepository.save(new User("III", 90));
userRepository.save(new User("JJJ", 100));
// 测试findAll, 查询所有记录
Assert.assertEquals(10, userRepository.findAll().size());
// 测试findByName, 查询姓名为FFF的User
Assert.assertEquals(60, userRepository.findByName("FFF").getAge().longValue());
// 测试findUser, 查询姓名为FFF的User
Assert.assertEquals(60, userRepository.findUser("FFF").getAge().longValue());
// 测试findByNameAndAge, 查询姓名为FFF并且年龄为60的User
Assert.assertEquals("FFF", userRepository.findByNameAndAge("FFF", 60).getName());
// 测试删除姓名为AAA的User
userRepository.delete(userRepository.findByName("AAA"));
// 测试findAll, 查询所有记录, 验证上面的删除是否成功
Assert.assertEquals(9, userRepository.findAll().size());
}
}
'''
GreetingControllerContent = '''
package hello;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
@Controller
public class GreetingController {
@RequestMapping("/greeting")
public String greeting(@RequestParam(value = "name", required = false, defaultValue = "World") String name,
Model model) {
model.addAttribute("name", name);
return "greeting";
}
}
'''
ServletInitializerContent = '''
package hello;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.support.SpringBootServletInitializer;
/**
* Created by YM on 5/16/2017.
*/
public class ServletInitializer extends SpringBootServletInitializer {
@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
return builder.sources(hello.Application.class);
}
}
'''
HelloControllerTestContent = '''
package hello;
import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertThat;
import java.net.URL;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.embedded.LocalServerPort;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.web.client.TestRestTemplate;
import org.springframework.http.ResponseEntity;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class HelloControllerTest {
@LocalServerPort
private int port;
private URL base;
@Autowired
private TestRestTemplate template;
@Before
public void setUp() throws Exception {
this.base = new URL("http://localhost:" + port + "/");
}
@Test
public void getHello() throws Exception {
ResponseEntity<String> response = template.getForEntity(base.toString(),
String.class);
assertThat(response.getBody(), equalTo("Greetings from Spring Boot!"));
}
}
'''
createFile("src/main/java/hello/Application.java", ApplicationContent)
createFile("src/main/java/hello/HelloController.java", HelloControllerContent)
createFile("src/main/java/hello/UserRepository.java", UserRepositoryContent)
createFile("src/main/java/hello/User.java", UserContent)
createFile("src/main/java/hello/GreetingController.java", GreetingControllerContent)
createFile("src/main/java/hello/ServletInitializer.java", ServletInitializerContent)
createFile("src/test/java/ApplicationTests.java", ApplicationTestsContent)
createFile("src/test/java/hello/HelloControllerTest.java", HelloControllerTestContent)
applicationPropertiesContent = '''
spring.datasource.driverClassName=
spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=root
spring.jpa.properties.hibernate.hbm2ddl.auto=create
'''
createFile("src/main/resources/application.properties", applicationPropertiesContent)
println "Please modify src/main/resources/application.properties"
webXmlContent = '''
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Archetype Created Web Application</display-name>
</web-app>
'''
indexJspContent = '''
<html>
<body>
<h2>Hello World!</h2>
</body>
</html>
'''
greetingHtmlContent = '''
<!DOCTYPE HTML>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>Getting Started: Serving Web Content</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<p th:text="'Hello, ' + ${name} + '!'" />
</body>
</html>
'''
createFile("src/main/webapp/WEB-INF/web.xml", webXmlContent)
createFile("src/main/webapp/index.jsp", indexJspContent)
createFile("src/main/resources/templates/greeting.html", greetingHtmlContent)
}
}
]]>
