????????????????????????????????????????????????????????????Spring Boot 集成 FreeMarker
主目錄:http://www.spring4all.com/article/246
轉(zhuǎn)載于:http://www.spring4all.com/article/269
SpringBoot 很方便的集成 FreeMarker ,DAO 數(shù)據(jù)庫(kù)操作層依舊用的是 Mybatis,本文將會(huì)一步一步到來(lái)如何集成 FreeMarker 以及配置的詳解:
git clone 下載工程?springboot-learning-example ,項(xiàng)目地址見?GitHub?-https://github.com/JeffLi1993/springboot-learning-example;下面開始運(yùn)行工程步驟(Quick Start):
1.數(shù)據(jù)庫(kù)準(zhǔn)備
a.創(chuàng)建數(shù)據(jù)庫(kù) springbootdb:
CREATE DATABASE springbootdb;
b.創(chuàng)建表 city :(因?yàn)槲蚁矚g徒步)
DROP TABLE IF EXISTS? `city`;
CREATE TABLE `city` (
? `id` int(10) unsigned NOT NULL AUTO_INCREMENT COMMENT '城市編號(hào)',
? `province_id` int(10) unsigned? NOT NULL COMMENT '省份編號(hào)',
? `city_name` varchar(25) DEFAULT NULL COMMENT '城市名稱',
? `description` varchar(25) DEFAULT NULL COMMENT '描述',
? PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
c.插入數(shù)據(jù)
INSERT city VALUES (1 ,1,'溫嶺市','BYSocket 的家在溫嶺。');

3.改數(shù)據(jù)庫(kù)配置
打開 application.properties 文件, 修改相應(yīng)的數(shù)據(jù)源配置,比如數(shù)據(jù)源地址、賬號(hào)、密碼等;(如果不是用 MySQL,pom 自行添加連接驅(qū)動(dòng)依賴,然后修改驅(qū)動(dòng)名配置)
4.編譯工程
在項(xiàng)目根目錄 springboot-learning-example,運(yùn)行 maven 指令:
mvn clean install
5.運(yùn)行工程
右鍵運(yùn)行?springboot-freemarker 工程 Application 應(yīng)用啟動(dòng)類的 main 函數(shù),然后在瀏覽器訪問(wèn):
獲取 ID 編號(hào)為 1 的城市信息頁(yè)面:
localhost:8080/api/city/1
獲取城市列表頁(yè)面:
localhost:8080/api/city
6.補(bǔ)充
運(yùn)行環(huán)境:JDK 7 或 8,Maven 3.0+
技術(shù)棧:SpringBoot、Mybatis、FreeMarker
springboot-freemarker 工程配置詳解
具體代碼見 GitHub -?https://github.com/JeffLi1993/springboot-learning-example
1.pom.xml 依賴
pom.xml 代碼如下:
<?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>springboot</groupId>
? ? <artifactId>springboot-freemarker</artifactId>
? ? <version>0.0.1-SNAPSHOT</version>
? ? <name>springboot-freemarker :: Spring Boot 集成 FreeMarker 案例</name>
? ? <!-- Spring Boot 啟動(dòng)父依賴 -->
? ? <parent>
? ? ? ? <groupId>org.springframework.boot</groupId>
? ? ? ? <artifactId>spring-boot-starter-parent</artifactId>
? ? ? ? <version>1.5.1.RELEASE</version>
? ? </parent>
? ? <properties>
? ? ? ? <mybatis-spring-boot>1.2.0</mybatis-spring-boot>
? ? ? ? <mysql-connector>5.1.39</mysql-connector>
? ? </properties>
? ? <dependencies>
? ? ? ? <!-- Spring Boot Freemarker 依賴 -->
? ? ? ? <dependency>
? ? ? ? ? ? <groupId>org.springframework.boot</groupId>
? ? ? ? ? ? <artifactId>spring-boot-starter-freemarker</artifactId>
? ? ? ? </dependency>
? ? ? ? <!-- Spring Boot Web 依賴 -->
? ? ? ? <dependency>
? ? ? ? ? ? <groupId>org.springframework.boot</groupId>
? ? ? ? ? ? <artifactId>spring-boot-starter-web</artifactId>
? ? ? ? </dependency>
? ? ? ? <!-- Spring Boot Test 依賴 -->
? ? ? ? <dependency>
? ? ? ? ? ? <groupId>org.springframework.boot</groupId>
? ? ? ? ? ? <artifactId>spring-boot-starter-test</artifactId>
? ? ? ? ? ? <scope>test</scope>
? ? ? ? </dependency>
? ? ? ? <!-- Spring Boot Mybatis 依賴 -->
? ? ? ? <dependency>
? ? ? ? ? ? <groupId>org.mybatis.spring.boot</groupId>
? ? ? ? ? ? <artifactId>mybatis-spring-boot-starter</artifactId>
? ? ? ? ? ? <version>${mybatis-spring-boot}</version>
? ? ? ? </dependency>
? ? ? ? <!-- MySQL 連接驅(qū)動(dòng)依賴 -->
? ? ? ? <dependency>
? ? ? ? ? ? <groupId>mysql</groupId>
? ? ? ? ? ? <artifactId>mysql-connector-java</artifactId>
? ? ? ? ? ? <version>${mysql-connector}</version>
? ? ? ? </dependency>
? ? ? ? <!-- Junit -->
? ? ? ? <dependency>
? ? ? ? ? ? <groupId>junit</groupId>
? ? ? ? ? ? <artifactId>junit</artifactId>
? ? ? ? ? ? <version>4.12</version>
? ? ? ? </dependency>
? ? </dependencies>
</project>
在 pom.xml 依賴中增加?Spring Boot?FreeMarker 依賴;
2.配置?FreeMarker
然后在 application.properties 中加入 FreeMarker 相關(guān)的配置:
## Freemarker 配置
## 文件配置路徑
spring.freemarker.template-loader-path=classpath:/web/
spring.freemarker.cache=false
spring.freemarker.charset=UTF-8
spring.freemarker.check-template-location=true
spring.freemarker.content-type=text/html
spring.freemarker.expose-request-attributes=true
spring.freemarker.expose-session-attributes=true
spring.freemarker.request-context-attribute=request
spring.freemarker.suffix=.ftl
這是我這塊的配置,如果需要更多的 FreeMarker 配置,可以查看下面的詳解:
spring.freemarker.allow-request-override=false # Set whether HttpServletRequest attributes are allowed to override (hide) controller generated model attributes of the same name.
spring.freemarker.allow-session-override=false # Set whether HttpSession attributes are allowed to override (hide) controller generated model attributes of the same name.
spring.freemarker.cache=false # Enable template caching.
spring.freemarker.charset=UTF-8 # Template encoding.
spring.freemarker.check-template-location=true # Check that the templates location exists.
spring.freemarker.content-type=text/html # Content-Type value.
spring.freemarker.enabled=true # Enable MVC view resolution for this technology.
spring.freemarker.expose-request-attributes=false # Set whether all request attributes should be added to the model prior to merging with the template.
spring.freemarker.expose-session-attributes=false # Set whether all HttpSession attributes should be added to the model prior to merging with the template.
spring.freemarker.expose-spring-macro-helpers=true # Set whether to expose a RequestContext for use by Spring's macro library, under the name "springMacroRequestContext".
spring.freemarker.prefer-file-system-access=true # Prefer file system access for template loading. File system access enables hot detection of template changes.
spring.freemarker.prefix= # Prefix that gets prepended to view names when building a URL.
spring.freemarker.request-context-attribute= # Name of the RequestContext attribute for all views.
spring.freemarker.settings.*= # Well-known FreeMarker keys which will be passed to FreeMarker's Configuration.
spring.freemarker.suffix= # Suffix that gets appended to view names when building a URL.
spring.freemarker.template-loader-path=classpath:/templates/ # Comma-separated list of template paths.
spring.freemarker.view-names= # White list of view names that can be resolved.
3.展示層 Controller 詳解
//城市 Controller 實(shí)現(xiàn) Restful HTTP 服務(wù)
@Controller
public class CityController {
? ? @Autowired
? ? private CityService cityService;
? ? @RequestMapping(value = "/api/city/{id}", method = RequestMethod.GET)
? ? public String findOneCity(Model model, @PathVariable("id") Long id) {
? ? ? ? model.addAttribute("city", cityService.findCityById(id));
? ? ? ? return "city";
? ? }
? ? @RequestMapping(value = "/api/city", method = RequestMethod.GET)
? ? public String findAllCity(Model model) {
? ? ? ? List<City> cityList = cityService.findAllCity();
? ? ? ? model.addAttribute("cityList",cityList);
? ? ? ? return "cityList";
? ? }
}
a.這里不是走 HTTP + JSON 模式,使用了?@Controller 而不是先前的 @RestController
b.方法返回值是 String 類型,和 application.properties 配置的?Freemarker 文件配置路徑下的各個(gè) *.ftl 文件名一致。這樣才會(huì)準(zhǔn)確地把數(shù)據(jù)渲染到 ftl 文件里面進(jìn)行展示。
c.用 Model 類,向 Model 加入數(shù)據(jù),并指定在該數(shù)據(jù)在?Freemarker 取值指定的名稱。
推薦:
FreeMarker 是常用的模板引擎,很多開發(fā) Web 的必選。
推薦閱讀《Springboot 那些事》,地址:https://www.bysocket.com/?page_id=1639