SpringBootベースのJpaクエリー

仕事は必要で、jpaを使って、長い間使っていないで、忘れて、簡単なdemoを書いて、後で調べるのに便利です.SpringBootでデータベースプロファイルを作成します.propertiesの構成:SpringBootはデフォルトでデータ・ソースの構成があることに注意してください.そうしないと、起動エラーを報告する必要はありません.起動クラスには次の注記が追加されます.

@SpringBootApplication(exclude = DataSourceAutoConfiguration.class,
DataSourceTransactionManagerAutoConfiguration.class,
HibernateJpaAutoConfiguration.class})

application.propertiesの構成:

spring.datasource.url=jdbc:mysql://localhost:3306/db_electric_car?
useUnicode=true&characterEncoding=UTF-8&useSSL=false
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.max-idle=10  
spring.datasource.max-wait=10000  
spring.datasource.min-idle=5  
spring.datasource.initial-size=5 

spring.jpa.hibernate.ddl-auto=update
spring.jpa.show-sql=true
spring.jackson.serialization.indent_output=true

エンティティクラスを新規作成するには、次の手順に従います.

package com.cn.restyle.entity;

import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name ="tb_app_user")  //        
public class AppUser {

    @Id
    @GeneratedValue(strategy=GenerationType.IDENTITY)  // id  
    private Integer id;

    private String mobile;
    private String pass;

    @Column(name="os")  //                    
    private String osString;
    private String brand;

    @Column(name="create_time")
    private Date createTime;

    @Column(name="update_time")
    private Date updateTime;
    private Integer isDelete;

    public AppUser(){}


    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getMobile() {
        return mobile;
    }
    public void setMobile(String mobile) {
        this.mobile = mobile;
    }
    public String getPass() {
        return pass;
    }
    public void setPass(String pass) {
        this.pass = pass;
    }
    public String getOsString() {
        return osString;
    }
    public void setOsString(String osString) {
        this.osString = osString;
    }
    public String getBrand() {
        return brand;
    }
    public void setBrand(String brand) {
        this.brand = brand;
    }
    public Date getCreateTime() {
        return createTime;
    }
    public void setCreateTime(Date createTime) {
        this.createTime = createTime;
    }
    public Date getUpdateTime() {
        return updateTime;
    }
    public void setUpdateTime(Date updateTime) {
        this.updateTime = updateTime;
    }
    public Integer getIsDelete() {
        return isDelete;
    }
    public void setIsDelete(Integer isDelete) {
        this.isDelete = isDelete;
    }

    public AppUser(Integer id, String mobile, String pass, String osString, String brand, Date createTime,
            Date updateTime, Integer isDelete) {
        super();
        this.id = id;
        this.mobile = mobile;
        this.pass = pass;
        this.osString = osString;
        this.brand = brand;
        this.createTime = createTime;
        this.updateTime = updateTime;
        this.isDelete = isDelete;
    }

    @Override
    public String toString() {
        return "AppUser [id=" + id + ", mobile=" + mobile + ", pass=" + pass + ", osString=" + osString + ", brand="
                + brand + ", createTime=" + createTime + ", updateTime=" + updateTime + ", isDelete=" + isDelete + "]";
    }

}

本人が使い慣れているツール類Result:

package com.cn.restyle.unit;

public class Result {

    public static final Integer OK = 0;
    public static final Integer error = -1;

            private Integer code;
            private String msg;
            private T data;

            public Result(){
                this.code = OK;
                this.msg = "success";
            }

            public Result(Integer code, String msg) {
                super();
                this.code = code;
                this.msg = msg;
            }

            public Result(Integer code, String msg, T data) {
                this.code = code;
                this.msg = msg;
                this.data = data;
            }


            public Result(T data) {
                super();
                this.data = data;
            }

            public Integer getCode() {
                return code;
            }

            public void setCode(Integer code) {
                this.code = code;
            }

            public String getMsg() {
                return msg;
            }

            public void setMsg(String msg) {
                this.msg = msg;
            }

            public T getData() {
                return data;
            }

            public void setData(T data) {
                this.data = data;
            }

            public static Integer getOk() {
                return OK;
            }

            public static Integer getError() {
                return error;
            }

}

インタフェースの定義:

package com.cn.restyle.mapper;


import org.apache.ibatis.annotations.Param;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.stereotype.Repository;

import com.cn.restyle.entity.AppUser;

@Repository
public interface AppUserMapper extends JpaRepository{

    AppUser findByMobile(String mobile);

    AppUser findByMobileAndPass(String mobile,String pass);

    @Query("select u from AppUser u where u.mobile = :mobile and u.pass = :pass")
    AppUser withMobleAndPassQuery(@Param("mobile")String mobile,@Param("pass")String pass);

}

注意、私はここで穴を踏んで、以前@Query("select u from AppUser u where u.mobile=:mobile and u.pass=:pass")と書いていましたが、後で実行するとき、エラーを報告しました

2017-11-23 15:55:37.519  INFO 11188 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 35 ms
2017-11-23 15:55:37.600 ERROR 11188 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: Name for parameter binding must not be null or empty! On JDKs < 8, you need to use @Param for named parameters, on JDK 8 or better, be sure to compile with -parameters.; nested exception is java.lang.IllegalArgumentException: Name for parameter binding must not be null or empty! On JDKs < 8, you need to use @Param for named parameters, on JDK 8 or better, be sure to compile with -parameters.] with root cause

java.lang.IllegalArgumentException: Name for parameter binding must not be null or empty! On JDKs < 8, you need to use @Param for named parameters, on JDK 8 or better, be sure to compile with -parameters.
    at org.springframework.util.Assert.hasText(Assert.java:181)
    at org.springframework.data.jpa.repository.query.StringQuery.getBindingFor(StringQuery.java:105)
    at org.springframework.data.jpa.repository.query.StringQueryParameterBinder.getBindingFor(StringQueryParameterBinder.java:75)
    at org.springframework.data.jpa.repository.query.StringQueryParameterBinder.bind(StringQueryParameterBinder.java:60)
    at org.springframework.data.jpa.repository.query.ParameterBinder.bind(ParameterBinder.java:101)
    at org.springframework.data.jpa.repository.query.SpelExpressionStringQueryParameterBinder.bind(SpelExpressionStringQueryParameterBinder.java:76)
    at org.springframework.data.jpa.repository.query.ParameterBinder.bindAndPrepare(ParameterBinder.java:161)
    at org.springframework.data.jpa.repository.query.ParameterBinder.bindAndPrepare(ParameterBinder.java:152)
    at org.springframework.data.jpa.repository.query.AbstractStringBasedJpaQuery.doCreateQuery(AbstractStringBasedJpaQuery.java:81)
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.createQuery(AbstractJpaQuery.java:190)
    at org.springframework.data.jpa.repository.query.JpaQueryExecution$SingleEntityExecution.doExecute(JpaQueryExecution.java:208)
    at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:87)
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:116)
    at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:106)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:483)
    at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:461)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:56)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:133)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)

今はこのように書けないのか分からない.そこで私はこのように変更しました:問題解決:

@Query("select u from AppUser u where u.mobile = ?1 and u.pass = ?2")

Controllerのコード:

package com.cn.restyle.controller;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.cn.restyle.entity.AppUser;
import com.cn.restyle.mapper.AppUserMapper;
import com.cn.restyle.unit.Result;


@RestController
@RequestMapping("/v1/spring")
public class Example {
    protected static Logger log = LoggerFactory.getLogger(Example.class);
    @Autowired
    AppUserMapper appUserMapper;

    @RequestMapping("/hell")
    String home(){
        return "Hello Word !";
    }

    @RequestMapping("/hello/{userName}")
    String index(@PathVariable String userName){   //         

        return "Hello" + userName;
    }

    @RequestMapping("/showData")
    public Result showData(){
        String mobile = "15721429352";
        AppUser appUser = appUserMapper.findByMobile(mobile);
        if (null != appUser) {
            log.info(appUser.toString());
        }else {
            log.info("            ");
        }
        return new Result();

    }

    @RequestMapping("/showDataMobileAndPass")
    public Result showDataMobileAndPass(){
        String mobile = "15721429352";
        String pass = "654321";
        AppUser appUser = appUserMapper.findByMobileAndPass(mobile, pass);
        if (null != appUser) {
            log.info(appUser.toString());
        }else {
            log.info("            ");
        }
        return new Result(appUser);

    }
    @RequestMapping("/withMobileAndPass")
    public Result withMobileAndPass(){
        String mobile = "15721429352";
        String pass = "654321";
        AppUser appUser = appUserMapper.withMobleAndPassQuery(mobile, pass);
        if (null != appUser) {
            log.info(appUser.toString());
        }else {
            log.info("            ");
        }
        return new Result(appUser);

    }


}

コードはテスト実行済みです.先に退勤...2,3日してから改善する時間がある