SpringBoot 第二篇

一、 SpringBoot整合FreeMarker 1.1 导入依赖

    org.springframework.boot
    spring-boot-starter-freemarker

1.2 在application.properties文件添加配置

########## 配置freemarker ##########
#是否开启缓存
spring.freemarker.cache=false
#路径
spring.freemarker.template-loader-path=classpath:/templates
#文件后缀
spring.freemarker.suffix=.ftl

spring.freemarker.charset=UTF-8
spring.freemarker.content-type=text/html

1.3 创建实体类

package com.qf.pojo;

public class Student {

    private Integer id;
    private String name;
    private Integer age;

    private String address;

    public Student(Integer id, String name, Integer age, String address) {

        this.id = id;
        this.name = name;
        this.age = age;
        this.address = address;
    }

    public Student() {
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {

        return name;
    }

    public void setName(String name) {
        this.name = name;
    }


    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }
}

1.4在templates目录下创建student.ftl文件（然后把该ftl文件拷贝到D:/ftl目录下，一会用）

    
    


    
        <#list students as student>
            <#if student_index % 2 == 0>
            
                <#else>
            

        

            
index
            
id
            
name
            
age
            
address
        

            
            
${student_index}
            
${student.id}
            
${student.name}
            
${student.age}
            
${student.address}
            
        
    

1.5创建controller

package com.qf.controller;

import com.qf.pojo.Student;
import freemarker.template.Configuration;
import freemarker.template.Template;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.HashMap;

@Controller
@RequestMapping("/freemarker")
public class FreeMarkerController {

    @RequestMapping("/student")
    public String hello(Model model) throws Exception {

        //创建List集合获取多个元素
        ArrayList students = new ArrayList<>();
        students.add(new Student(1, "jack", 18, "郑州二七"));
        students.add(new Student(2, "rose", 19, "郑州中原"));
        students.add(new Student(3, "tom", 20, "郑州金水"));

        model.addAttribute("students",students);

        return "/student";
    }

    //生成静态页面的方法
    @RequestMapping("createHtml")
    @ResponseBody
    public String createHtml()throws Exception{
        //获取配置对象
        Configuration configuration = new Configuration(Configuration.DEFAULT_INCOMPATIBLE_IMPROVEMENTS);
        //设置字符集
        configuration.setDefaultEncoding("utf-8");

        //设置加载的模版目录
        configuration.setDirectoryForTemplateLoading(new File("D:/ftl"));
        //创建List集合获取多个元素
        ArrayList students = new ArrayList<>();
        students.add(new Student(1,"张三",18,"北京"));
        students.add(new Student(2,"李四",19,"上海"));
        students.add(new Student(3,"王五",20,"广州"));

        //使用map集合加载数据
        HashMap map = new HashMap<>();
        map.put("students",students);

        //创建输出流对象
        FileWriter fileWriter = new FileWriter(new
                File("D:/ftl_html/student.html"));

        //获取加载的模板
        Template template = configuration.getTemplate("student.ftl");
        //生成html文件
        template.process(map,fileWriter);
        //关流
        fileWriter.close();

        return "success";
    }

}

启动工程，进行测试

二、SpringBoot整合Thymeleaf 2.1导入依赖

    org.springframework.boot
    spring-boot-starter-thymeleaf

2.2在application.properties文件添加配置

########## 配置thymeleaf ##########
spring.thymeleaf.cache=false
spring.thymeleaf.encoding=utf-8

spring.thymeleaf.prefix=classpath:/templates

spring.thymeleaf.suffix=.html

spring.thymeleaf.mode=HTML5
spring.thymeleaf.servlet.content-type=text/html

2.3创建实体类

package com.qf.pojo;

import java.util.Date;

public class User {

    private Integer id;
    private String username;
    private String password;

    private Date birthday;

    public User(Integer id, String username, String password, Date birthday) {
        this.id = id;
        this.username = username;
        this.password = password;
        this.birthday = birthday;
    }
    
    public User() {
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public Date getBirthday() {
        return birthday;
    }

    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + ''' +
                ", password='" + password + ''' +
                ", birthday=" + birthday +
                '}';
    }
}

2.4创建Controller

package com.qf.controller;

import com.qf.pojo.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.ArrayList;
import java.util.Date;

@Controller
@RequestMapping("user")
public class UserController {


    @RequestMapping("findAll")
    public String findAll(Model model) {

        ArrayList users = new ArrayList<>();

        users.add(new User(1001, "张三", "123", new Date()));
        users.add(new User(1002, "李四", "456", new Date()));
        users.add(new User(1003, "王五", "789", new Date()));

        model.addAttribute("users", users);

        return "/list";
    }

    @RequestMapping("findById")
    public String findById(Model model, String uid) {
        System.out.println(uid);

        if (uid.equals("1001")) {
            User user = new User(1001, "张三", "123", new Date());
            model.addAttribute("user", user);
        }

        return "/queryOne";

    }

}

2.5在templates目录下创建list.html以及queryOne.html

list.html

    
    






    

    

    
    


    






    

        
序号
        
姓名
        
生日
        
详情
    
    

        

        

        

        
查询
    

queryOne.html

    
    



    
    
    用户名：


    密码：

三、SpringBoot整合Redis 3.1导入依赖

    org.springframework.boot
    spring-boot-starter-data-redis




    org.apache.commons
    commons-pool2




    com.fasterxml.jackson.core
    jackson-databind
    2.12.3

3.2创建application.yml文件并添加配置

spring:
  redis:
    host: 127.0.0.1
    port: 6379
    database: 0
    lettuce:
      pool:
        max-active: 100

3.3创建User类

package com.qf.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;

@AllArgsConstructor
@NoArgsConstructor
@Data
public class User implements Serializable {

    private Integer id;
    private String name;

}

3.4导入Redis序列化配置类

package com.qf.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

@Configuration
public class RedisConfig {

    
    @Bean
    public RedisTemplate redisTemplate(LettuceConnectionFactory connectionFactory) {
        RedisTemplate redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(connectionFactory);
        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
        redisTemplate.setKeySerializer(stringRedisSerializer); //设置key的序列化方式
        redisTemplate.setHashKeySerializer(stringRedisSerializer);//设置hash类型的数据的key的序列化方式

        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);//非final类型的数据才会被序列化
        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);

        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);//设置value的序列化方式为json
        redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);

        return redisTemplate;
    }
}

3.5导入Redis工具类

package com.qf.utils;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.util.CollectionUtils;

import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;

@Component
public final class RedisUtil {

    @Autowired
    private RedisTemplate redisTemplate;

    // =============================common============================

    
    public boolean expire(String key, long time, TimeUnit timeUnit) {
        try {
            if (time > 0) {
                redisTemplate.expire(key, time, timeUnit);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    
    public long getExpire(String key) {
        return redisTemplate.getExpire(key, TimeUnit.SECONDS);
    }


    
    public boolean hasKey(String key) {
        try {
            return redisTemplate.hasKey(key);
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }


    
    @SuppressWarnings("unchecked")
    public void del(String... key) {
        if (key != null && key.length > 0) {
            if (key.length == 1) {
                redisTemplate.delete(key[0]);
            } else {
                redisTemplate.delete((Collection) CollectionUtils.arrayToList(key));
            }
        }
    }


    // ============================String=============================

    
    public Object get(String key) {
        return key == null ? null : redisTemplate.opsForValue().get(key);
    }

    

    public boolean set(String key, Object value) {
        try {
            redisTemplate.opsForValue().set(key, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }


    

    public boolean set(String key, Object value, long time) {
        try {
            if (time > 0) {
                redisTemplate.opsForValue().set(key, value, time, TimeUnit.SECONDS);
            } else {
                set(key, value);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }


    
    public long incr(String key, long delta) {
        if (delta < 0) {
            throw new RuntimeException("递增因子必须大于0");
        }
        return redisTemplate.opsForValue().increment(key, delta);
    }


    
    public long decr(String key, long delta) {
        if (delta < 0) {
            throw new RuntimeException("递减因子必须大于0");
        }
        return redisTemplate.opsForValue().increment(key, -delta);
    }


    // ================================Map=================================

    
    public Object hget(String key, String item) {
        return redisTemplate.opsForHash().get(key, item);
    }

    
    public Map hmget(String key) {
        return redisTemplate.opsForHash().entries(key);
    }

    
    public boolean hmset(String key, Map map) {
        try {
            redisTemplate.opsForHash().putAll(key, map);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }


    
    public boolean hmset(String key, Map map, long time, TimeUnit timeUnit) {
        try {
            redisTemplate.opsForHash().putAll(key, map);
            if (time > 0) {
                expire(key, time, timeUnit);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }


    
    public boolean hset(String key, String item, Object value) {
        try {
            redisTemplate.opsForHash().put(key, item, value);
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    
    public boolean hset(String key, String item, Object value, long time, TimeUnit timeUnit) {
        try {
            redisTemplate.opsForHash().put(key, item, value);
            if (time > 0) {
                expire(key, time, timeUnit);
            }
            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }


    
    public void hdel(String key, Object... item) {
        redisTemplate.opsForHash().delete(key, item);
    }


    
    public boolean hHasKey(String key, String item) {
        return redisTemplate.opsForHash().hasKey(key, item);
    }


    
    public double hincr(String key, String item, double by) {
        return redisTemplate.opsForHash().increment(key, item, by);
    }


    
    public double hdecr(String key, String item, double by) {
        return redisTemplate.opsForHash().increment(key, item, -by);
    }


    // ============================set=============================

    
    public Set