spring boot mybatis mysql example

("SELECT * from Users") @Results ({@Result = "usersex", column = "User_sex", Javatype = Usersexenum.class), @Result (property = "nickname", column = "Nick_name")}) listgetAll ();3@Select ("SELECT * from users WHERE id = #{id}") 4@Results ({@Result property = "Usersex", column = "User_sex", Javatype = Usersexenum.class), 5@Result (property = "nickname", column = "Nick_name") }) 6Userentity GetOne (Long ID); @Insert ("Insert into Users (username,password,user_sex) VALUES (#{username}, #{password}

"); //conditional notation. if(Demo.getname ()! =NULL) {SET ("Name=#{name}"); } if(Demo.getemail ()! =NULL) {SET ("Email=#{email}"); } WHERE ("Id=#{id}"); }}.tostring (); } Code in Demomapper:yards Collection Code @updateprovider (type=demosqlprovider. Class, method="update2") publicint update2 ( Demo demo); (8) Delete @DeleteProvider unhappyDemosqlprovider Code:Java code Collection code */* * * @param demo * @return */public String Delete2

=0recommend= * @ apisuccess {String} msg information * @apiSuccess (+) {int} code 0 means no error 1 for error * @apiSuccessExample {JSON} return sample: * {"Code": "0", "MSG": "Registered successfully"} */　　Creating a document interface with the Apidoc commandThe first CD to the project's outer directory, and the outer layer to build an output document directory, I built the DOCAPI.Output command:apidoc -i chapter4/ -o apidoc/-I input directory-o output direct

caused by: org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying Bean of type [ So.dian.dev.device.interfaces.IDeviceInfoSV] is defined:expected single matching beans but found 2:deviceinfosvimpl, IDEVICEINFOSV At org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency ( defaultlistablebeanfactory.java:1126) At org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency ( defaultlistablebeanfactory.java:10

When using spring boot plus mybatis, set map to return, the value is empty when the property will not, will be an errorAdding the following configuration to the application.properties will solve this problem.#当查询数据为空时字段返回为null, if this query data is empty, the field will be hiddenMybatis.configuration.call-setters-on-nulls=trueSpring

{ //============== //PRIVATE fields //============== //an autogenerated ID (unique for each user in the db) @Id @GeneratedValue (strategy = Generationtype.auto) Private long ID; //the user email @NotNull Private String email; //the user name @NotNull Private String name; //============== //public METHODS //============== Public User () {} Public user (long id) { this.id = ID; } //Getter and Setter methods //... } //class User Data access layer for 4.User entities Us

MyBatis MyBatis is an excellent persistence layer framework that supports common SQL queries, stored procedures, and advanced mappings. MyBatis eliminates the manual setting of almost all JDBC code and parameters and the retrieval encapsulation of the result set. MyBatis can use simple XML or annotations for configura

;Importorg.springframework.boot.SpringApplication;Importorg.springframework.boot.autoconfigure.SpringBootApplication, @SpringBootApplication @mapperscan ("Com.jihite.mapper") Public classApplication { Public Static voidMain (string[] args) {springapplication.run (application.class, args); }}#datasourcemybatis.type-aliases-package == = Jdbc:mysql://ip:port/dbname?useunicode= Truecharacterencoding=utf-8spring.datasource.username == passwd4. Notes4.1 Loading DataSourceThe Springboot automatically l

Introduced?? This article describes how to connect and process a MySQL database in a spring project.?? The project uses spring Data JPA and hibernate to connect and process the MySQL database, which is, of course, just one way, and you can use spring JDBC or

Tags: lin system err same str method list size SchemaThis is a small fragment of a system (endowment insurance Management) that I have written about, and today it suddenly occurred to me how to change the request data to JSON. (Spring+springmvc+mybatis+mysql) as follows 1. Front-end JSP page Divclass= "Tab_tip">Please enter [ID number or name]inputtype= "text"cla

the specific format log4j.appender.Console.layout = Org.apache.log4j.PatternLayout LOG4J.APPENDER.CONSOLE.LAYOUT.CONVERSIONPATTERN=[%C]-%m%n #文件大小到达指定尺寸的时候产生一个新的文件 log4j.appender.File = Org.apache.log4j.RollingFileAppender #指定输出目录 log4j.appender.File.File = Logs/ssm.log #定义文件最大大小 log4j.appender.File.MaxFileSize = 10MB # output so log, if switching to debug indicates output debug above level log Log4j.appender.File.Threshold = all log4j.appender.File.layout = Org.apache.log4j.PatternLayout Log4

) Official document: Docs.spring.io/spring-data/jpa/docs/2.0.9.release/reference/html/#jpa. Repositories3.3 Custom SQL statement queries For the user to write Sql,spring Boot JPA is also very good support, only need to add @query (SQL). Example code: @Transactional @Modifying @Query("update User set name=?1

]= This. Embeddedvalueresolver.resolvestringvalue (Patterns[i]); } returnResolvedpatterns; } } The spring code is not very obscure, interested in child shoes research propertyplaceholderconfigurer (and if it does not find the XXX key defined in ${xxx}, it will also go to the JVM System Properties (System.getproperty () ) and Environment variables (system.getenv ()).Summarize:XML file, if ${} is used, the work of parsing depends on t