Postgresql+Springboot yml基本使用

PostgreSQL是一种特性非常齐全的自由软件的对象-关系型数据库管理系统（ORDBMS），是以加州大学计算机系开发的POSTGRES，4.2版本为基础的对象关系型数据库管理系统。POSTGRES的许多领先概念只是在比较迟的时候才出现在商业网站数据库中。PostgreSQL支持大部分的SQL标准并且提供了很多其他现代特性，如复杂查询、外键、触发器、视图、事务完整性、多版本并发控制等。同样，PostgreSQL也可以用许多方法扩展，例如通过增加新的数据类型、函数、操作符、聚集函数、索引方法、过程语言等。另外，因为许可证的灵活，任何人都可以以任何目的免费使用、修改和分发PostgreSQL。

、 PostgostreSQL 稳定性很强，在崩溃等场景下抗打击能力特别强，对比mysql在电脑崩溃等情景下的丢失数据情况，PG数据库这方面要好一些。

、对比Mysql，PostgostreSQL支持的数据类型更多

、PostgostreSQL可以使用sql进行编程

、PG 的有多种集群架构可以选择，plproxy 可以支持语句级的镜像或分片，slony 可以进行字段级的同步设置，standby 可以构建WAL文件级或流式的读写分离集群，同步频率和集群策略调整方便，操作非常简单。

、PostgreSQL的可以使用函数和条件索引

、PG 的 TEXT 类型可以直接访问，SQL语法内置正则表达式，能够索引，还可以全文检索。用PG的话，文档数据库都可以省了。

、 PostgreSQL的性能很强，在高并发读写的场景下，PostgreSQL的性能指标依旧可以维持顶峰，相对比 MySQL 在同样的场景下会出现一个明显的下滑（mysql5.5之后，在企业级版本中有个插件可以改善很多，不过需要付费）。

1.导入Maven

                    org.postgresql            postgresql            runtime        

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2.编写yml配置文件

spring:  datasource:    url: jdbc:postgresql://localhost:5432/postgres # url: jdbc:mysql://localhost:3306/tis?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8&useSSL=false    username: postgres    password: 123456    driverClassName: org.postgresql.Driver  jackson:    time-zone: GMT+8  jpa:    properties:      open-in-view: true      hibernate:        show_sql: false        format_sql: true        dialect: org.hibernate.dialect.PostgreSQLDialect        temp:          use_jdbc_metadata_defaults: false        hbm2ddl:          auto: update    database: postgresql  rabbitmq:    host: 192.168.90.205    port: 5672    username: admin    password: admin    virtual-host: /

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编写Entity实体类

package com.supcon.oms.entity;import com.fasterxml.jackson.annotation.JsonIgnoreProperties;import lombok.Data;import javax.persistence.*;import java.io.Serializable;@Data@Entity@Table(name = "t_tank", schema = "public", catalog = "")@JsonIgnoreProperties(ignoreUnknown = true)public class TTankEntity implements Serializable { private static final long serialVersionUID = 4718371560086576837L;@Id@Column(name="tank_id")@GeneratedValue(strategy = GenerationType.IDENTITY)private Integer tankId;@Basic@Column(name = "tank_no", nullable = false, length = 255)private String tankNo;@Basic@Column(name = "equipment_type", nullable = true, length = 255)private String equipmentType;@Basic@Column(name = "tank_name", nullable = true, length = 255)private String tankName;@Basic@Column(name = "tank_description", nullable = true, length = 1000)private String tankDescription;@Basic@Column(name = "equipment_status", nullable = true, length = 255)private String equipmentStatus;@Basic@Column(name = "tank_keepwarm", nullable = true, length = 100)private String tankKeepwarm;@Basic@Column(name = "tank_status", nullable = true, length = 255)private String tankStatus;@Basic@Column(name = "tank_farmid", nullable = true, length = 255)private String tankFarmid;@Basic@Column(name = "tank_type", nullable = true, length = 255)private String tankType;@Basic@Column(name = "tank_diameter", nullable = true, precision = 0)private Double tankDiameter;@Basic@Column(name = "tank_height", nullable = true, precision = 0)private Double tankHeight;@Basic@Column(name = "tank_capacity_standard", nullable = true, precision = 0)private Double tankCapacityStandard;@Basic@Column(name = "liquid_level_temperature", nullable = true, precision = 0)private Double liquidLevelTemperature;@Basic@Column(name = "tank_capacity_safe", nullable = true, precision = 0)private Double tankCapacitySafe;@Basic@Column(name = "calculate_type", nullable = true, length = 255)private String calculateType;@Basic@Column(name = "working_level_min", nullable = true, precision = 0)private Double workingLevelMin;@Basic@Column(name = "working_level_max", nullable = true, precision = 0)private Double workingLevelMax;    @Basic@Column(name = "nominal_volume", nullable = true, precision = 0)private Double nominalVolume;@Basic@Column(name = "thermal_expansion_system", nullable = true, length = 255)private String thermalExpansionSystem;@Basic@Column(name = "floating_point_quality", nullable = true, length = 255)private String floatingPointQuality;@Basic@Column(name = "level_change_dead", nullable = true, length = 100)private String levelChangeDead;@Basic@Column(name = "alarm_events", nullable = true, length = 255)private String alarmEvents;@Basic@Column(name = "tank_capacity_now", nullable = true, precision = 0)private Double tankCapacityNow;@Basic@Column(name = "tank_quality", nullable = true, precision = 0)private Double tankQuality;@Basic@Column(name = "tank_temperature", nullable = true, precision = 0)private Double tankTemperature;@Basic@Column(name = "tank_pressure", nullable = true, precision = 0)private Double tankPressure;@Basic@Column(name = "flow_speed", nullable = true, precision = 0)private Double flowSpeed;@Basic@Column(name = "flow_amount", nullable = true, precision = 0)private Double flowAmount;@Basic@Column(name = "remaining_space", nullable = true, precision = 0)private Double remainingSpace;@Basic@Column(name = "vcf", nullable = true, precision = 0)private Double vcf;@Basic@Column(name = "liquid_level_status", nullable = true, length = 255)private String liquidLevelStatus;@Basic@Column(name = "net_standard_volume", nullable = true, precision = 0)private Double netStandardVolume;@Basic@Column(name = "water_bottom_volume", nullable = true, precision = 0)private Double waterBottomVolume;@Basic@Column(name = "tank_flow_inout", nullable = true, precision = 0)private Double tankFlowInout;@Basic@Column(name = "usable_volume", nullable = true, precision = 0)private Double usableVolume;@Basic@Column(name = "standard_quality_sum", nullable = true, precision = 0)private Double standardQualitySum;@Basic@Column(name = "standard_quality_net", nullable = true, precision = 0)private Double standardQualityNet;@Basic@Column(name = "working_volume_max", nullable = true, precision = 0)private Double workingVolumeMax;@Basic@Column(name = "working_volume_min", nullable = true, precision = 0)private Double workingVolumeMin;@Basic@Column(name = "liquid_level", nullable = true, precision = 0)private Double liquidLevel;@Basic@Column(name = "physical_temperature", nullable = true, precision = 0)private Double physicalTemperature;@Basic@Column(name = "ambient_temperature", nullable = true, precision = 0)private Double ambientTemperature;@Basic@Column(name = "density_of_material", nullable = true, precision = 0)private Double densityOfMaterial;@Basic@Column(name = "police_liquid_level", nullable = true, length = 255)private String policeLiquidLevel;@Basic@Column(name = "police_temperature", nullable = true, length = 255)private String policeTemperature;@Basic@Column(name = "police_liquid_switch", nullable = true, length = 255)private String policeLiquidSwitch;@Basic@Column(name = "police_instrument_system", nullable = true, length = 255)private String policeInstrumentSystem;@Basic@Column(name = "police_inout_volume", nullable = true, length = 255)private String policeInoutVolume;@Basic@Column(name = "oms_source_target", nullable = true)private Integer omsSourceTarget;@Basic@Column(name = "oms_share", nullable = true)private Integer omsShare;@Basic@Column(name = "oms_share_depth", nullable = true)private Integer omsShareDepth;@Basic@Column(name = "oms_occupy", nullable = true)private Integer omsOccupy;@Basic@Column(name = "materiel_name", nullable = true, length = 255)private String materielName;@Basic@Column(name = "materiel_type", nullable = true, length = 255)private String materielType;@Basic@Column(name = "materiel_quality_attributes", nullable = true, length = 255)private String materielQualityAttributes;@Basic@Column(name = "materiel_density", nullable = true, precision = 0)private Double materielDensity;}

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其他的按照正常的框架写就可以了，和mysql的使用方式基本上没有区别

来源地址：https://blog.csdn.net/2301_76965813/article/details/130493444