Springboot如何整合FreeMarker
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一、项目搭建
1、新建模块
2、导入依赖 :将不相关的依赖删掉
<!-- <dependency>--><!-- <groupId>org.mybatis.spring.boot</groupId>--><!-- <artifactId>mybatis-spring-boot-starter</artifactId>--><!-- <version>2.1.4</version>--><!-- </dependency>--> <dependency> <groupId>tk.mybatis</groupId> <artifactId>mapper-spring-boot-starter</artifactId> <version>2.0.2</version> </dependency> <dependency> <groupId>javax.persistence</groupId> <artifactId>persistence-api</artifactId> <version>1.0</version> <scope>compile</scope> </dependency>
3、新建软件包,放入student实体类
package com.lv.code.pojo; import lombok.AllArgsConstructor;import lombok.Data;import lombok.NoArgsConstructor;import lombok.experimental.Accessors; @Data@NoArgsConstructor@AllArgsConstructor@Accessors(chain = true)public class Student { private Long stuId; private String stuName; private String stuPhone; private Long stuClass; private String stuAddress;}
4、新建StudentMapper接口
package com.lv.code.mapper; import com.lv.code.pojo.Student;import org.springframework.stereotype.Repository;import tk.mybatis.mapper.common.Mapper; @Repositorypublic interface StudentMapper extends Mapper<Student> { }
5、Springboot04Application内引用mapper
package com.lv.code; import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;import tk.mybatis.spring.annotation.MapperScan; @SpringBootApplication@MapperScan("com.lv.code.mapper")public class Springboot04Application { public static void main(String[] args) { SpringApplication.run(Springboot04Application.class, args); } }
6、application.yml文件配置
server: port: 8080# 配置数据源spring: datasource: username: root password: 123456 driver-class-name: com.mysql.cj.jdbc.Driver url: jdbc:mysql://localhost:3306/aaa?userSSL=false&serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8&allowPublicKeyRetrieval=true# 日志打印logging: level: com.lv.code.mapper: debug
7、测试
Springboot04ApplicationTests:
package com.lv.code; import com.lv.code.mapper.StudentMapper;import org.junit.jupiter.api.Test;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.test.context.SpringBootTest; @SpringBootTestclass Springboot04ApplicationTests { @Autowired StudentMapper mapper; @Test void contextLoads() { System.out.println(mapper.selectAll()); } }
8、将切面、util包、启动器导入
导入依赖
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-aop</artifactId> </dependency> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper-spring-boot-starter</artifactId> <version>1.2.10</version> </dependency>
切面PageAspect:
package com.lv.code.aspect; import com.github.pagehelper.Page;import com.github.pagehelper.PageHelper;import com.github.pagehelper.PageInfo;import com.lv.code.util.PageBean;import lombok.extern.slf4j.Slf4j;import org.aspectj.lang.ProceedingJoinPoint;import org.aspectj.lang.annotation.Around;import org.aspectj.lang.annotation.Aspect;import org.springframework.stereotype.Component; @Component@Aspect@Slf4jpublic class PageAspect { @Around(value = "execution(* *..*Service.*Pager(..))") public Object invoke(ProceedingJoinPoint point) throws Throwable { PageBean pageBean = null; for (Object e : point.getArgs()) { if (e instanceof PageBean) { pageBean = (PageBean) e; break; } } if (pageBean != null && pageBean.isPagination()) { PageHelper.startPage(pageBean.getPage(), pageBean.getRows()); } Object obj = point.proceed(point.getArgs()); if (obj != null) { if (obj instanceof Page) { Page page = (Page) obj; PageInfo pageInfo = new PageInfo(page); pageBean.setTotal(new Long(pageInfo.getTotal()).intValue()); return pageInfo.getList(); } } return obj; } }
util包中的PageBean类
package com.lv.code.util; import lombok.AllArgsConstructor;import lombok.Data;import lombok.NoArgsConstructor; import javax.servlet.http.HttpServletRequest;import java.util.Map; @Data@NoArgsConstructor@AllArgsConstructorpublic class PageBean { private int total; private int page = 1; private int rows = 5; private boolean pagination = true; private String url; private Map<String, String[]> ms; public void setMs(Map<String, String[]> ms) { this.ms = ms; } public int calcStartIndex() { return (page - 1) * rows; } public int calcMaxPage() { return total % rows == 0 ? total / rows : total / rows + 1; } public int nextPage() { return Math.min(page + 1, calcMaxPage()); } public int prevPage() { return Math.max(page - 1, 1); } public void setRequest(HttpServletRequest req) { setUrl(req.getRequestURL().toString()); setMs(req.getParameterMap()); String page = req.getParameter("page"); if (page == null) { setPage(1); } else { setPage(Integer.parseInt(page)); } String rows = req.getParameter("rows"); if (rows == null) { setRows(5); } else { setRows(Integer.parseInt(rows)); } String pagination = req.getParameter("pagination"); if ("false".equals(pagination)) { setPagination(false); } } }
9、新建service层
新建StudentService接口:
package com.lv.code.service; import com.lv.code.pojo.Student;import com.lv.code.util.PageBean; import java.util.List; public interface StudentService { List<Student> findPager(PageBean pageBean); }
实现StudentService接口:StudentServiceImpl
package com.lv.code.service; import com.lv.code.mapper.StudentMapper;import com.lv.code.pojo.Student;import com.lv.code.util.PageBean;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service; import java.util.List; @Servicepublic class StudentServiceImpl implements StudentService { @Autowired private StudentMapper mapper; @Override public List<Student> findPager(PageBean pageBean) { return mapper.selectAll(); }}
10、新建controller层
StudentController类:
package com.lv.code.controller; import com.github.pagehelper.PageRowBounds;import com.lv.code.service.StudentService;import com.lv.code.util.PageBean;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RestController; import javax.servlet.http.HttpServletRequest; @RestControllerpublic class StudentController { @Autowired private StudentService service; @GetMapping public Object find(HttpServletRequest request){ PageBean pageBean=new PageBean(); pageBean.setRequest(request); return service.findPager(pageBean); } }
11、运行启动类Springboot04Application,访问localhost:8080网址
二、freemarker介绍
1、新建资源文件application.yml
更改配置文件,添加freemarker配置
server: port: 8080# 配置数据源spring: datasource: username: root password: 123456 driver-class-name: com.mysql.cj.jdbc.Driver url: jdbc:mysql://localhost:3306/aaa?userSSL=false&serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8&allowPublicKeyRetrieval=true freemarker: #指定HttpServletRequest的属性是否可以覆盖controller的model的同名项 allow-request-override: false #req访问request request-context-attribute: req #后缀名freemarker默认后缀为.ftl,当然你也可以改成自己习惯的.html suffix: .ftl #设置响应的内容类型 content-type: text/html;charset=utf-8 #是否允许mvc使用freemarker enabled: true #是否开启template caching cache: false #设定模板的加载路径,多个以逗号分隔,默认: [ “classpath:/templates/” ] template-loader-path: classpath:/templates/ #设定Template的编码 charset: UTF-8# 日志打印logging: level: com.lv.code.mapper: debug
2、模板语法
3、在资源文件中的templates文件下新建index.ftl文件
增加模块:
然后可选中freemarker直接生成ftl文件
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