springboot学习笔记-3 整合redis&mongodb【转载】

一.整合redis

1.1 建立实体类

@Entity@Table(name="user")public class User implements Serializable {    @Id    @GeneratedValue(strategy=GenerationType.AUTO)    private Long id;    private String name;    @DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss")    private Date createDate;        @JsonBackReference        //防止json的重复引用问题    private Department department;    private Set<Role> roles;    public Long getId() {        return id;    }    public void setId(Long id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public Date getCreateDate() {        return createDate;    }    public void setCreateDate(Date createDate) {        this.createDate = createDate;    }    public Department getDepartment() {        return department;    }    public void setDepartment(Department department) {        this.department = department;    }    public Set<Role> getRoles() {        return roles;    }    public void setRoles(Set<Role> roles) {        this.roles = roles;    }    @Override    public String toString() {        return "User [id=" + id + ", name=" + name + ", createDate=" + createDate + ", department=" + department                + ", roles=" + roles + "]";    }    }

1.2 建立Redis的配置类

　　首先导入pom.xml相应的依赖

<dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-redis</artifactId></dependency>

 

　　在springboot中,没有去提供直接操作Redis的Repository,但是我们可以使用RedisTemplate去访问Redis.想要去使用RedisTemplate,首先需要完成一些必要的配置.这里使用配置类去完成.

　　在application.properties中建立Redis的相关配置:

　　建立配置类,配置RedisTemplate,而要使用RedisTemplate还需要配置RedisConnectionFactory:

@ConfigurationProperties("application.properties")@Configurationpublic class RedisConfig {    @Value("${spring.redis.hostName}")    private String hostName;    @Value("${spring.redis.port}")    private Integer port;    @Bean    public RedisConnectionFactory redisConnectionFactory() {        JedisConnectionFactory cf = new JedisConnectionFactory();          cf.setHostName(hostName);          cf.setPort(port);         cf.afterPropertiesSet();          return cf;      }        @Bean    public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory) {        StringRedisTemplate template=new StringRedisTemplate(factory);        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer=new Jackson2JsonRedisSerializer(Object.class);        ObjectMapper om=new ObjectMapper();        om.setVisibility(PropertyAccessor.ALL,JsonAutoDetect.Visibility.ANY);        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);        jackson2JsonRedisSerializer.setObjectMapper(om);        template.setValueSerializer(jackson2JsonRedisSerializer);        template.afterPropertiesSet();        return template;    }}

1.3 建立UserRedis类,它实现了与Redis的交互

　　注意,在UserRedis中,使用了Redis的数据结构中最常用的key-value都是字符串的形式,采用Gson将对象转化为字符串然后存放到redis中.

@Repositorypublic class UserRedis {    @Autowired    private RedisTemplate<String, String> redisTemplate;        public void add(String key,User user) {        Gson gson=new Gson();        redisTemplate.opsForValue().set(key,gson.toJson(user));    }    public void add(String key,List<User> users) {        Gson gson=new Gson();        redisTemplate.opsForValue().set(key,gson.toJson(users));    }    public User get(String key ) {        Gson gson=new Gson();        User user=null;        String userStr=redisTemplate.opsForValue().get(key);        if(!StringUtils.isEmpty(userStr))            user=gson.fromJson(userStr, User.class);        return user;    }    public List<User> getList(String key) {        Gson gson=new Gson();        List<User> users=null;        String listJson=redisTemplate.opsForValue().get(key);        if(!StringUtils.isEmpty(listJson)) {            users=gson.fromJson(listJson,new TypeToken<List<User>>(){}.getType());        }        return users;    }    public void delete(String key) {        redisTemplate.opsForValue().getOperations().delete(key);    }}

1.4 建立UserController类

　　它自动注入了UserRedis类,通过不同的url实现了向redis存储数据,获取数据的功能.

@Controllerpublic class UserController {    @Autowired    UserRedis userRedis;        @RequestMapping("/user/testRedisSave")    public String testRedis() {        Department department=new Department();        department.setName("开发部");        Role role=new Role();        role.setName("admin");        User user=new User();        user.setName("hlhdidi");        user.setCreateDate(new Date());        user.setDepartment(department);        Set<Role> roles=new HashSet<>();        roles.add(role);        user.setRoles(roles);        userRedis.delete(this.getClass().getName()+":username:"+user.getName());        userRedis.add(this.getClass().getName()+":username:"+user.getName(), user);        return null;    }    @RequestMapping("/user/testRedisGet")    public String testRedis2() {        User user=userRedis.get(this.getClass().getName()+":username:hlhdidi");        System.out.println(user);        return null;    }}

　　先访问localhost:8080/user/testRedisSave,再访问localhost:8080/user/testRedisGet,即可测试成功!

二.整合MongoDB

　　MongoDB是一种文档类型的NoSql数据库.它内部有三个层次的概念,分别为数据库,集合,文档.使用springboot可以非常方便的整合MongoDB

2.1 建立mongo.properties配置文件

　　

　　导入依赖:

<dependency>            <groupId>org.pegdown</groupId>            <artifactId>pegdown</artifactId>            <version>1.4.1</version>        </dependency>        <dependency>            <groupId>org.springframework.boot</groupId>            <artifactId>spring-boot-starter-hateoas</artifactId>        </dependency>        <dependency>            <groupId>org.springframework.data</groupId>            <artifactId>spring-data-mongodb</artifactId>        </dependency>        <dependency>            <groupId>com.fasterxml.jackson.core</groupId>            <artifactId>jackson-annotations</artifactId>        </dependency>

2.2 建立MongoConfig配置类,完成对于MongoDB的配置

@Configuration@EnableMongoRepositories(basePackages={"com.hlhdidi.springboot.mongo"})//MongoRepository的扫描包@PropertySource("classpath:mongo.properties")//注入配置文件属性public class MongoConfig extends AbstractMongoConfiguration{    @Autowired    private Environment env;        @Override    protected String getDatabaseName() {        return env.getRequiredProperty("mongo.name");    }    @Override    @Bean    public Mongo mongo() throws Exception {        ServerAddress serverAddress=new ServerAddress(env.getRequiredProperty("mongo.host"));        List<MongoCredential> credentials=new ArrayList<>();        return new MongoClient(serverAddress, credentials);    }}

2.3 建立SysUser实体类.

　　该实体类需要被存储到MongoDB数据库中.

@Document(collection="user")//配置collection的名称,如果没有将会自动建立对应的Collectionpublic class SysUser {    @Id    private String userId;    @NotNull @Indexed(unique=true)    private String username;    @NotNull    private String password;    @NotNull    private String name;    @NotNull    private String email;    @NotNull    private Date registrationDate=new Date();    private Set<String> roles=new HashSet<>();    public SysUser(){}    @PersistenceConstructor    public SysUser(String userId, String username, String password, String name, String email, Date registrationDate,            Set<String> roles) {        super();        this.userId = userId;        this.username = username;        this.password = password;        this.name = name;        this.email = email;        this.registrationDate = registrationDate;        this.roles = roles;    }    public String getUserId() {        return userId;    }    public void setUserId(String userId) {        this.userId = userId;    }    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 String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getEmail() {        return email;    }    public void setEmail(String email) {        this.email = email;    }    public Date getRegistrationDate() {        return registrationDate;    }    public void setRegistrationDate(Date registrationDate) {        this.registrationDate = registrationDate;    }    public Set<String> getRoles() {        return roles;    }    public void setRoles(Set<String> roles) {        this.roles = roles;    }    @Override    public String toString() {        return "SysUser [userId=" + userId + ", username=" + username + ", password=" + password + ", name=" + name                + ", email=" + email + ", registrationDate=" + registrationDate + ", roles=" + roles + "]";    }    }

2.4 建立SysUserRepository

　　由于springboot已经帮我们提供了操作MongoDB数据库的API,因此直接继承对应的类即可(和JPA一致)

@Repositorypublic interface SysUserRepository extends MongoRepository<SysUser, String>{}

2.5 测试

测试类先向MongoDB中存储了一个实体类对象,随后获取指定对象的指定Collections下面的所有文档

@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(classes={MongoConfig.class})@FixMethodOrderpublic class MongoTest {    @Autowired    SysUserRepository repository;        @Before    public void setup() {        Set<String> roles=new HashSet<>();        roles.add("manage");        SysUser sysUser=new SysUser("1", "hlhdidi", "123", "xiaohulong", "email@com.cn", new Date(), roles);        repository.save(sysUser);    }    @Test    public void findAll() {        List<SysUser> users=repository.findAll();        for(SysUser user:users) {            System.out.println(user);        }    }}