介绍

本来想用 JPA Metamodel generator 但是觉得看不惯就照着 TypedSort写了个工具类

1. 项目中很多地方用到了实体的key，而且直接写的魔法值。为了处理魔法值跟字段可能的变动导致的不可预测错误，所以有了这个工具。
   1. 

工具依赖

2.0.3开始存在

<!--  TypedBean依赖 -->
<dependency>
  <groupId>cn.jdevelops</groupId>
  <artifactId>utils-spring</artifactId>
  <version>${last.version}</version>
     <!-- <version>2.0.3</version>-->
</dependency>
<!--  ColumnUtil依赖 -->
<dependency>
  <groupId>cn.jdevelops</groupId>
  <artifactId>utils-map</artifactId>
  <version>2.0.3</version>
</dependency>

工具类

cn.jdevelops.spring.entity.**TypedBean.java**
cn.jdevelops.map.core.bean.**ColumnUtil.java**

TypedBean

依赖类

cn.jdevelops.spring.springutil.*

• LazyStreamable.java
• MethodInvocationRecorder.java
• Optionals.java
• Pair.java
• Streamable.java

  使用

  ```java package cn.jdevelops.spring.entity;

import junit.framework.TestCase; import lombok.Getter; import lombok.Setter;

public class TypedBeanTest extends TestCase {

public void testOf() {
    assertEquals(TypedBean.of(Apply.class).getKey(Apply::getAge),"age");
    assertEquals(TypedBean.of(Apply.class).getKey(Apply::getName),"name");
    assertEquals(TypedBean.of(Help.class).getKey(Help::getAuthor),"author");
    assertEquals(TypedBean.of(Help.class).getKey(Help::getTitle),"title");
}
@Getter
@Setter
public class Apply {
    private String age,name;
}
@Getter
@Setter
public class Help {
    private String author,title;
}

}

<a name="IxciC"></a>
## **ColumnUtil**
> 获取一些[特殊父类](https://github.com/en-o/Jdevelops/blob/master/jdevelops-utils/utils-map/src/test/java/cn/jdevelops/map/core/bean/ColumnUtilTest.java)的属性有点问题
> - **TypedBean可以**
> - **2.0.5 已修复**
<a name="Z0pLP"></a>
### 使用
```java
import junit.framework.TestCase;
import lombok.Getter;
import lombok.Setter;
public class ColumnUtilTest extends TestCase {
    public void testOf() {
        assertEquals(ColumnUtil.getFieldName(Apply::getAge),"age");
        assertEquals(ColumnUtil.getFieldName(Apply::getName),"name");
        assertEquals(ColumnUtil.getFieldName(Apply::getMySex),"sex");
        assertEquals(ColumnUtil.getFieldName(Apply::getMySex,true),"sex");
        assertEquals(ColumnUtil.getFieldName(Help::getAuthor),"author");
        assertEquals(ColumnUtil.getFieldName(Help::getTitle),"title");
        assertEquals(ColumnUtil.getFieldName(Help::getMyTest,true),"my_test");
    }
    @Getter
    @Setter
    public static class Apply {
        private String age,name;
        @ColumnUtil.TableField(value = "sex")
        private String mySex;
    }
    @Getter
    @Setter
    public static class Help {
        private String author,title,myTest;
    }
}