java.lang.NoSuchMethodException: Property 'newsTitle' has no setter method in class 原因解决@DATA

向右看齐 2023-07-20 05:43 19阅读 0赞

@Data
    @EqualsAndHashCode(callSuper = true)
    @Accessors(chain = true)
    @TableName("corpus_information")
    public class Information extends BaseEntity {

使用这俩个注解然后使用反射进行属性赋值，但是却允许提示下面的错误信息。

Connected to the target VM, address: '127.0.0.1:63863', transport: 'socket'
    log4j:WARN No appenders could be found for logger (org.apache.commons.beanutils.converters.BooleanConverter).
    log4j:WARN Please initialize the log4j system properly.
    log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
    Exception in thread "main" java.lang.RuntimeException: java.lang.NoSuchMethodException: Property 'newsTitle' has no setter method in class 'class com.gildata.threebody.corpus.dao.model.Information'
    	at com.gildata.threebody.util.ReflectUtil.setProperty(ReflectUtil.java:364)
    	at com.gildata.threebody.util.ReflectUtil.setProperty(ReflectUtil.java:328)
    	at com.gildata.threebody.excel.parsing.ExcelImport.readRow(ExcelImport.java:154)
    	at com.gildata.threebody.excel.parsing.ExcelImport.readRows(ExcelImport.java:120)
    	at com.gildata.threebody.excel.parsing.ExcelImport.doReadExcel(ExcelImport.java:71)
    	at com.gildata.threebody.excel.parsing.ExcelImport.readExcel(ExcelImport.java:46)
    	at com.gildata.threebody.excel.ExcelContext.readExcel(ExcelContext.java:199)
    	at com.gildata.threebody.corpus.dao.excelutil.ImportTest.main(ImportTest.java:21)
    Caused by: java.lang.NoSuchMethodException: Property 'newsTitle' has no setter method in class 'class com.gildata.threebody.corpus.dao.model.Information'
    	at org.apache.commons.beanutils.PropertyUtilsBean.setSimpleProperty(PropertyUtilsBean.java:2084)
    	at org.apache.commons.beanutils.PropertyUtilsBean.setNestedProperty(PropertyUtilsBean.java:1903)
    	at org.apache.commons.beanutils.PropertyUtilsBean.setProperty(PropertyUtilsBean.java:2010)
    	at org.apache.commons.beanutils.PropertyUtils.setProperty(PropertyUtils.java:896)
    	at com.gildata.threebody.util.ReflectUtil.setProperty(ReflectUtil.java:358)
    	... 7 more
    Disconnected from the target VM, address: '127.0.0.1:63863', transport: 'socket'

解决办法需要重新写一个类，自动生成set、get方法。

然后属性类，与使用的类对象进行复制，就可以完美的解决这个问题了。

# 原因： #

@Target({ElementType.TYPE})
    @Retention(RetentionPolicy.SOURCE)
    public @interface Data {
        String staticConstructor() default "";
    }

@Target({ElementType.TYPE, ElementType.FIELD})
    @Retention(RetentionPolicy.SOURCE)
    public @interface Accessors {
        boolean fluent() default false;
    
        boolean chain() default false;
    
        String[] prefix() default {};
    }

RetentionPolicy.SOURCE  在源码级别就是运行。所以会在runtime失效、导致读不到这个set和get犯法。