Error message: an error is reported when the mybatis-plus framework is added
java.lang.IllegalArgumentException: argument type mismatch
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_201]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_201]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_201]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_201]
at org.apache.ibatis.reflection.invoker.MethodInvoker.invoke(MethodInvoker.java:44) ~[mybatis-3.5.6.jar:3.5.6]
at org.apache.ibatis.reflection.wrapper.BeanWrapper.setBeanProperty(BeanWrapper.java:180) ~[mybatis-3.5.6.jar:3.5.6]
at org.apache.ibatis.reflection.wrapper.BeanWrapper.set(BeanWrapper.java:59) ~[mybatis-3.5.6.jar:3.5.6]
at org.apache.ibatis.reflection.MetaObject.setValue(MetaObject.java:140) ~[mybatis-3.5.6.jar:3.5.6]
at com.baomidou.mybatisplus.core.MybatisParameterHandler.populateKeys(MybatisParameterHandler.java:131) ~[mybatis-plus-core-3.4.1.jar:3.4.1]
at com.baomidou.mybatisplus.core.MybatisParameterHandler.process(MybatisParameterHandler.java:112) ~[mybatis-plus-core-3.4.1.jar:3.4.1]
at com.baomidou.mybatisplus.core.MybatisParameterHandler.processParameter(MybatisParameterHandler.java:81) ~[mybatis-plus-core-3.4.1.jar:3.4.1]
at com.baomidou.mybatisplus.core.MybatisParameterHandler.<init>(MybatisParameterHandler.java:64) ~[mybatis-plus-core-3.4.1.jar:3.4.1]
at com.baomidou.mybatisplus.core.MybatisXMLLanguageDriver.createParameterHandler(MybatisXMLLanguageDriver.java:35) ~[mybatis-plus-core-3.4.1.jar:3.4.1]
at org.apache.ibatis.session.Configuration.newParameterHandler(Configuration.java:645) ~[mybatis-3.5.6.jar:3.5.6]
at org.apache.ibatis.executor.statement.BaseStatementHandler.<init>(BaseStatementHandler.java:69) ~[mybatis-3.5.6.jar:3.5.6]
at org.apache.ibatis.executor.statement.PreparedStatementHandler.<init>(PreparedStatementHandler.java:41) ~[mybatis-3.5.6.jar:3.5.6]
at org.apache.ibatis.executor.statement.RoutingStatementHandler.<init>(RoutingStatementHandler.java:46) ~[mybatis-3.5.6.jar:3.5.6]
at org.apache.ibatis.session.Configuration.newStatementHandler(Configuration.java:658) ~[mybatis-3.5.6.jar:3.5.6]
at com.baomidou.mybatisplus.core.executor.MybatisSimpleExecutor.doUpdate(MybatisSimpleExecutor.java:54) ~[mybatis-plus-core-3.4.1.jar:3.4.1]
at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117) ~[mybatis-3.5.6.jar:3.5.6]
at com.baomidou.mybatisplus.core.executor.MybatisCachingExecutor.update(MybatisCachingExecutor.java:85) ~[mybatis-plus-core-3.4.1.jar:3.4.1]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_201]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_201]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_201]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_201]
at org.apache.ibatis.plugin.Invocation.proceed(Invocation.java:49) ~[mybatis-3.5.6.jar:3.5.6]
at com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor.intercept(MybatisPlusInterceptor.java:83) ~[mybatis-plus-extension-3.4.1.jar:3.4.1]
The reason for the error: the new parameter type does not match, the main reason is that there is no primary key generation strategy
Solution: add annotation @TableId(value = "id",type = IdType.AUTO)//Primary key generation strategy
package com.fh.model;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import com.fasterxml.jackson.annotation.JsonFormat;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.boot.jackson.JsonComponent;
import org.springframework.format.annotation.DateTimeFormat;
import java.util.Date;
@Data
@NoArgsConstructor
@AllArgsConstructor
@TableName("d_drug") // 说明数据库表名
public class Drug {
@TableId(value = "id",type = IdType.AUTO)
private Integer id;
@TableField("drugName") // 说明数据库字段名
private String drugName;
@TableField("drugPrice")
private Integer drugPrice;//价格
@TableField("drugSales")
private Integer drugSales;//销量
@TableField("drugStock")
private Integer drugStock;//库存
@TableField("isOTC")
private Integer isOTC;//1是非处方药 2是处方药
private String person;//适合人群(1幼儿 2少年 3青年 4中年 5老年 6孕妇)
@DateTimeFormat(pattern = "yyyy-MM-dd")
@JsonFormat(pattern = "yyyy-MM-dd",timezone = "GMT+8")
@TableField("producedDate")
private Date producedDate;
private String photo;
@TableField("brandId")
private Integer brandId;
@TableField(exist = false) // 数据库表中没有这个字段,但又必须使用,外键名称,两表联查使用
private String brandName;
@TableField("areaId")
private Integer areaId;
@TableField(exist = false) // 数据库表中没有这个字段,但又必须使用,外键名称,两表联查使用
private String areaName;
}