分类：Java

自定义XStream fields序列化顺序

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xstream_field_orderDownload
1. XMLSequence : 注解用于TestXml class 2. TestXml : Class for xstream fields 3. PartialSeqFieldKeySorter: 自定义fields顺序,toXml输出 
import com.thoughtworks.xstream.converters.reflection.FieldKey;
import com.thoughtworks.xstream.converters.reflection.FieldKeySorter;
import com.thoughtworks.xstream.core.util.OrderRetainingMap;

import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;

public class PartialSeqFieldKeySorter implements FieldKeySorter {
    @Override
    public Map sort(Class type, Map keyedByFieldKey) {
        Annotation sequence = type.getAnnotation(XMLSequence.class);
        if (sequence != null) {
            final String[] fieldsOrder = ((XMLSequence) sequence).value();
            Map custom = new LinkedHashMap<>();
            Map notCustom = new LinkedHashMap<>();
            Set> fields = keyedByFieldKey.entrySet();
            for (String fieldName : fieldsOrder) {
                if (fieldName != null) {
                    for (Map.Entry fieldEntry : fields) {
                        if (fieldName.equalsIgnoreCase(fieldEntry.getKey().getFieldName())) {
                            custom.put(fieldEntry.getKey(), fieldEntry.getValue());
                        }
                    }
                }
            }
            return custom;
        } else {
            return keyedByFieldKey;
        }
    }
}

Mockito for JUnit5 测试用例

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1. Mock下 NPE 异常解决 
SomeClass someclass = mock(SomeClass.class,Mockito.RETURNS_DEEP_STUBS);
2. Assert Any Exceptions 断言异常 
assertThrows(RunTimeException.class,
            ()->{
                 //logic code
            });
3. Mock private method私有方法 
@InjectMocks
PrivateInClass privateInClass;
ReflectionTestUtils.invokeMethod(privateInClass, "privateMethodName", param1, param2, ...);
4. Mock final class 将文件加入到如下路径 
.../test/resources/mockkito-extensions/org.mockito.plugins.MockMaker
MockMaker 文件内容 
mock-maker-inline

BloomRPC 不能导入proto文件问题解决

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  1. 尝试导入proto所在目录 import path 包含所有相关proto包含的公共类和资源proto文件
  2. 当出现 “boolmrpc e is not a construtor, error construct request” 错误
    需要检查proto文件是否正确：
    1) 是否引入的1个或多个proto是不必要的不使用到的
    2) proto有语法错误
    3) import path 下的相关proto文件出现错误，而未必是当前目录，可能平级目录，……

DocumentBuilderFactory 的Forify 问题 : XML External Entity Injection及解决

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参考代码 


DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();

documentBuilderFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);

documentBuilderFactory.setFeature("http://xml.org/sax/features/external-general-entities", false);

documentBuilderFactory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);

documentBuilderFactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);

documentBuilderFactory.setXIncludeAware(false);

documentBuilderFactory.setExpandEntityReferences(false);

……