Springboot整合FreeMarker的实现示例

目录

一、项目搭建1、新建模块2、导入依赖 ：将不相关的依赖删掉3、新建软件包，放入student实体类4、新建studentmapper接口5、springboot04application内引用mapper6、application.yml文件配置7、测试8、将切面、util包、启动器导入9、新建rvice层10、新建controller层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.yml2、模板语法3、在资源文件中的templates文件下新建index.ftl文件

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-b质量法规oot-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; /** * 学谢谢大家的英文生表student * @author hgh * @date 2022-01-21t13:35:43.912 */@data@noargsconstructor@allargsconstructor@accessors(chain = true)public class student {    /**     * 学生编号 主键 自增     */    private long stuid;     /**     * 学生名字     */    private string stuname;     /**     * 学生电话     */    private string stuphone;     /**     * 学生班级     */    private long stuclass;     /**     * 学生地址     */    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; @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

rver:  port: 8080#  配置数据源spring:  datasource:    urname: root    password: 123456    driver-class-name: com.mysql.cj.jdbc.driver    url: jdbc:mysql://localhost:3306/aaa?urssl=fal&rvertimezone=asia/shanghai&uunicode=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.lectall());    } }

8、将切面、util包、启动器导入

导入依赖

<dependency>            <groupid>org.springframework.boot</groupid>            <artifa专科警校ctid>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@slf4jpublic class pageaspect {     @around(value = "execution(* *..*rvice.*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.ttotal(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.rvlet.http.httprvletrequest;import java.util.map; /** *小屋子 @author 银喾 */@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 tms(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 trequest(httprvletrequest req) {        turl(req.getrequesturl().tostring());        tms(req.getparametermap());        string page = req.getparameter("page");        if (page == null) {            tpage(1);        } el {            tpage(integer.parint(page));        }        string rows = req.getparameter("rows");        if (rows == null) {            trows(5);        } el {            trows(integer.parint(rows));        }        string pagination = req.getparameter("pagination");        if ("fal".equals(pagination)) {            tpagination(fal);        }    } }

9、新建rvice层

新建studentrvice接口：

package com.lv.code.rvice; import com.lv.code.pojo.student;import com.lv.code.util.pagebean; import java.util.list; public interface studentrvice {     list<student> findpager(pagebean pagebean); }

实现studentrvice接口：studentrviceimpl

package com.lv.code.rvice; 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.rvice; import java.util.list; @rvicepublic class studentrviceimpl implements studentrvice {    @autowired    private studentmapper mapper;     @override    public list<student> findpager(pagebean pagebean) {        return mapper.lectall();    }}

10、新建controller层

studentcontroller类：

package com.lv.code.controller; import com.github.pagehelper.pagerowbounds;import com.lv.code.rvice.studentrvice;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.rvlet.http.httprvletrequest; @restcontrollerpublic class studentcontroller {    @autowired    private studentrvice rvice;     @getmapping    public object find(httprvletrequest request){        pagebean pagebean=new pagebean();        pagebean.trequest(request);        return rvice.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

rver:  port: 8080#  配置数据源spring:  datasource:    urname: root    password: 123456    driver-class-name: com.mysql.cj.jdbc.driver    url: jdbc:mysql://localhost:3306/aaa?urssl=f冒险岛之旅al&rvertimezone=asia/shanghai&uunicode=true&characterencoding=utf-8&allowpublickeyretrieval=true  freemarker:    #指定httprvletrequest的属性是否可以覆盖controller的model的同名项    allow-request-override: fal    #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;chart=utf-8    #是否允许mvc使用freemarker    enabled: true    #是否开启template caching    cache: fal    #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    chart: 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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