java MyBatis 不使用布尔映射

MyBatis not working with Boolean mapping

提问by stack man

I am just trying to map a boolean value with Mybatis, but I am having a problem. Firstly, I'll show you the parts involved:

我只是想用 Mybatis 映射一个布尔值，但我遇到了问题。首先，我将向您展示所涉及的部分：

XML File:

<resultMap id="destinationTypeMap" type="DestinationTypeDTO">
        <result property="destinationTypeId" column="education_destination_type_id" javaType="java.lang.Long" jdbcType="NUMERIC"/>
        <result property="description" column="description" javaType="java.lang.String" jdbcType="VARCHAR"/>
        <result property="available" column="is_available" javaType="boolean" jdbcType="VARCHAR" typeHandler="BooleanHandler"/>
    </resultMap>

Java class:

Java类：

public class DestinationTypeDTO {

    private long destinationTypeId;
    private String description;
    private boolean available;

    public long getDestinationTypeId() {
        return destinationTypeId;
    }

    public void setDestinationTypeId(long destinationTypeId) {
        this.destinationTypeId = destinationTypeId;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public boolean isAvailable() {
        return available;
    }

    public void setAvailable(boolean available) {
        this.available = available;
    }

}

But, I am getting this error log:

但是，我收到此错误日志：

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException: Could not set property 'isAvailable' of '....DestinationTypeDTO@bbd76bf' with value 'true' Cause: org.apache.ibatis.reflection.ReflectionException: There is no setter for property named 'isAvailable' in 'class ....DestinationTypeDTO'

I spent hours trying to find what's going on but without success. Any hint?

我花了几个小时试图找出发生了什么，但没有成功。任何提示？

Thanks everyone.

感谢大家。

回答by sol4me

Change javaType="boolean"to java.lang.Booleanand specify property="available"

更改javaType="boolean"为java.lang.Boolean并指定property="available"

<result property="available" column="is_available" property="available" javaType="java.lang.Boolean" jdbcType="VARCHAR" typeHandler="BooleanHandler"/>

In your class change private boolean available;to private Boolean isAvailable;and add getter/setter

在你的类变private boolean available;来private Boolean isAvailable;和附加的getter / setter

public void setIsAvailable(Boolean available) {
    this.available = available;
}

public Boolean getIsAvailable() {
    return available;
}

回答by Panther

Change your setter , ibatis expects boolean name with standard format of pojo:-

更改您的 setter ，ibatis 需要标准格式的 pojo 布尔名称：-

 public void setIsAvailable(boolean available) {
    this.available = available;
}

回答by cgab

Your database column is named "is_available" and your attribute is named "available" that's why the mapping is not working, you have two solutions for this:

您的数据库列名为“is_available”，您的属性名为“available”，这就是映射不起作用的原因，您有两种解决方案：

1. Change the name of the column to "available" or change the name of the attribute"is_available"(not ok for Java)

2. In the sql query use "is_available as available".

1. 将列的名称更改为“可用”或将属性名称更改为“is_available”（不适用于 Java）

2. 在 sql 查询中使用“is_available as available”。

回答by Mateusz Stefek

Use

利用

javaType="_boolean"

Not

不是

javaType="boolean"

_booleanmaps to boolean, booleanmaps to java.lang.Boolean.

_boolean映射到boolean，boolean映射到java.lang.Boolean。

Documentation: http://www.mybatis.org/mybatis-3/configuration.html

文档：http: //www.mybatis.org/mybatis-3/configuration.html