我对 Java 很陌生,尤其是对 Maven 尤其是 protostuff 项目(protostuff 网站)很陌生。我需要使用 protostuff 将 XML 序列化/反序列化为谷歌的 protobuf 格式。我尝试使用protobuf-java-format包,但是在反序列化中有一个记录错误,这对我来说是一个阻碍(问题 37)。
到目前为止,我已经完成了以下工作:
- 下载 protostuff-1.3.1 并提取它。
- Ran
mvn integration-test
,mvn install
并且mvn package
所有步骤都成功了。 - 然后我创建了一个新的 Maven 项目并包含了一个原型,如此处所述
然后我修改了我的 pom.xml 并按照上述链接
protostuff:compile
中的描述在 proto 上运行,生成以下 Person.java 文件// Generated by http://code.google.com/p/protostuff/ ... DO NOT EDIT! // Generated from foo.proto package com.example.foo; import java.io.Externalizable; import java.io.IOException; import java.io.ObjectInput; import java.io.ObjectOutput; import com.dyuproject.protostuff.ByteString; import com.dyuproject.protostuff.GraphIOUtil; import com.dyuproject.protostuff.Input; import com.dyuproject.protostuff.Message; import com.dyuproject.protostuff.Output; import com.dyuproject.protostuff.Schema; import com.dyuproject.protostuff.UninitializedMessageException; public final class Person implements Externalizable, Message<Person>, Schema<Person> { public enum Gender implements com.dyuproject.protostuff.EnumLite<Gender> { MALE(1), FEMALE(2); public final int number; private Gender (int number) { this.number = number; } public int getNumber() { return number; } public static Gender valueOf(int number) { switch(number) { case 1: return MALE; case 2: return FEMALE; default: return null; } } } public static Schema<Person> getSchema() { return DEFAULT_INSTANCE; } public static Person getDefaultInstance() { return DEFAULT_INSTANCE; } static final Person DEFAULT_INSTANCE = new Person(); static final String DEFAULT_MOTTO = ByteString.stringDefaultValue("When the cat is away, the mouse is alone!"); static final Gender DEFAULT_GENDER = Gender.MALE; private Integer id; private String name; private String motto = DEFAULT_MOTTO; private Gender gender; public Person() { } public Person( Integer id ) { this.id = id; } // getters and setters // id public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } // name public String getName() { return name; } public void setName(String name) { this.name = name; } // motto public String getMotto() { return motto; } public void setMotto(String motto) { this.motto = motto; } // gender public Gender getGender() { return gender == null ? Gender.MALE : gender; } public void setGender(Gender gender) { this.gender = gender; } // java serialization public void readExternal(ObjectInput in) throws IOException { GraphIOUtil.mergeDelimitedFrom(in, this, this); } public void writeExternal(ObjectOutput out) throws IOException { GraphIOUtil.writeDelimitedTo(out, this, this); } // message method public Schema<Person> cachedSchema() { return this; } // schema methods public Person newMessage() { return new Person(); } public Class<Person> typeClass() { return Person.class; } public String messageName() { return Person.class.getSimpleName(); } public String messageFullName() { return Person.class.getName(); } public boolean isInitialized(Person message) { return message.id != null; } public void mergeFrom(Input input, Person message) throws IOException { for(int number = input.readFieldNumber(this);; number = input.readFieldNumber(this)) { switch(number) { case 0: return; case 1: message.id = input.readInt32(); break; case 2: message.name = input.readString(); break; case 3: message.motto = input.readString(); break; case 4: message.gender = Gender.valueOf(input.readEnum()); break; default: input.handleUnknownField(number, this); } } } public void writeTo(Output output, Person message) throws IOException { if(message.id == null) throw new UninitializedMessageException(message); output.writeInt32(1, message.id, false); if(message.name != null) output.writeString(2, message.name, false); if(message.motto != null && message.motto != DEFAULT_MOTTO) output.writeString(3, message.motto, false); if(message.gender != null) output.writeEnum(4, message.gender.number, false); } public String getFieldName(int number) { switch(number) { case 1: return "id"; case 2: return "name"; case 3: return "motto"; case 4: return "gender"; default: return null; } } public int getFieldNumber(String name) { final Integer number = __fieldMap.get(name); return number == null ? 0 : number.intValue(); } private static final java.util.HashMap<String,Integer> __fieldMap = new java.util.HashMap<String,Integer>(); static { __fieldMap.put("id", 1); __fieldMap.put("name", 2); __fieldMap.put("motto", 3); __fieldMap.put("gender", 4); } }
我正在 Eclipse(Luna 版本)中构建整个项目,它为上述文件提供了错误“无法解析导入 com.dyuproject”。我不明白为什么它会给出错误或如何查找/安装包以便 Eclipse 可以看到它。Maven应该构建/提供它吗?
我在 VirtualBox VM 上运行 CentOS 6.4 版(最终版):
uname -a
Linux localhost.localdomain 2.6.32-358.18.1.el6.x86_64 #1 SMP Wed Aug 28 17:19:38 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
`