Springboot整合FreeMarker的實現示例
一、項目搭建
1、新建模塊
2、導入依賴 ：將不相關的依賴刪掉
<!-- <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、新建軟件包，放入student實體類
package com.lv.code.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.experimental.Accessors;
/**
* 學生表 student
* @author hgh
* @date 2022-01-21T13:35:43.912
*/
@Data
@NoArgsConstructor
@AllArgsConstructor
@Accessors(chain = true)
public class Student {
/**
* 學生編號 主鍵 自增
*/
private Long stuId;
/**
* 學生名字
*/
private String stuName;
/**
* 學生電話
*/
private String stuPhone;
/**
* 學生班級
*/
private Long stuClass;
/**
* 學生地址
*/
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;
@Repository
public interface StudentMapper extends Mapper<Student> {
}
5、Springboot04Application內引用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
# 配置數據源
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、測試
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;
@SpringBootTest
class Springboot04ApplicationTests {
@Autowired
StudentMapper mapper;
@Test
void contextLoads() {
System.out.println(mapper.selectAll());
}
}
8、將切面、util包、啟動器導入
導入依賴
<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;
/**
* @author yk
*/
@Component
@Aspect
@Slf4j
public 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類
package com.lv.code.util;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import javax.servlet.http.HttpServletRequest;
import java.util.Map;
/**
* @author 銀嚳
*/
@Data
@NoArgsConstructor
@AllArgsConstructor
public 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層
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);
}
實現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;
@Service
public class StudentServiceImpl implements StudentService {
@Autowired
private StudentMapper mapper;
@Override
public List<Student> findPager(PageBean pageBean) {
return mapper.selectAll();
}
}
10、新建controller層
StudentController類：
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;
@RestController
public class StudentController {
@Autowired
private StudentService service;
@GetMapping
public Object find(HttpServletRequest request){
PageBean pageBean=new PageBean();
pageBean.setRequest(request);
return service.findPager(pageBean);
}
}
11、運行啟動類Springboot04Application，訪問localhost：8080網址
二、freemarker介紹
1、新建資源文件application.yml
更改配置文件,添加freemarker配置
server:
port: 8080
# 配置數據源
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的屬性是否可以覆蓋controller的model的同名項
allow-request-override: false
#req訪問request
request-context-attribute: req
#後綴名freemarker默認後綴為.ftl，當然你也可以改成自己習慣的.html
suffix: .ftl
#設置響應的內容類型
content-type: text/html;charset=utf-8
#是否允許mvc使用freemarker
enabled: true
#是否開啟template caching
cache: false
#設定模板的加載路徑，多個以逗號分隔，默認: [ “classpath:/templates/” ]
template-loader-path: classpath:/templates/
#設定Template的編碼
charset: UTF-8
# 日志打印
logging:
level:
com.lv.code.mapper: debug
2、模板語法
3、在資源文件中的templates文件下新建index.ftl文件
增加模塊：
然後可選中freemarker直接生成ftl文件
到此這篇關於Springboot整合FreeMarker的實現示例的文章就介紹到這瞭,更多相關Springboot整合FreeMarker 內容請搜索WalkonNet以前的文章或繼續瀏覽下面的相關文章希望大傢以後多多支持WalkonNet！
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