xstream实现java对象和XML的互相转换_java 使用xstream 对象转xml,添加指定前缀-优快云博客

本文介绍XStream库，用于实现Java对象与XML之间的相互转换。文章涵盖XStream的特点、使用方法及常见注解，并通过示例展示如何将XML内容转换为Java对象。

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一、XStream简介

1. XStream的功能：Java对象与XML之间进行互相转化。

2. XStream的特点：灵活易用、高性能、整洁的XML、转换策略定制、错误诊断等。

3. XStream使用场景：转换；持久化对象；配置；单元测试。

4. 依赖的包： xstream-[version].jar、xpp3-[version].jar、xmlpull-[version].jar

5. MAVEN中pom.xml文件配置

<groupId>com.thoughtworks.xstream</groupId>

<artifactId>xstream</artifactId>

</dependency>

二、XStream的使用

1. 创建XStream实例

XStream xstream = new XStream;

XStream xstream = new XStream(new DomDriver);

XStream xstream = new XStream(new StaxDriver);

2. 常用方法

xstream.toXML：将对象转换成XML

xstream.fromXML：将XML转换成对象

xstream.alias：为指定类创建别名

xstream.useAttributeFor：设置属性

xstream.aliasField：为字段设置别名

xstream.aliasAttribute：为属性设置别名

xstream.addImplicitCollection：集合节点隐藏，只显示子信息节点

xstream.processAnnotations：处理Annotations信息

xstream.autodetectAnnotations：自动侦查注解

3. 常用的注解

@XStreamAlias("message")：为类和字段设置别名

@XStreamImplicit(itemFieldName="part")：隐式集合注解

@XStreamAsAttribute：转换成属性

@XStreamOmitField：不跟XML对应，需要省略的字段

@XStreamConverter：注入转换器

三、代码示例

1. 假设有如下XML内容要转换成JAVA对象

<?xml version="1.0" encoding="UTF-8"?>
<table name="ts_user" comment="用户信息">
<column name="id" type="char" length="10" comment="ID"></column>
<column name="name" type="varchar" length="50" comment="用户名"></column>
<column name="password" type="varchar" length="100" comment="密码"></column>
<column name="age" type="int" length="11" comment="年龄"></column>
<column name="createDate" type="date" comment="创建日期"></column>
</table>

2. 创建对应的model类

import java.util.List;

import com.thoughtworks.xstream.annotations.XStreamAlias;
import com.thoughtworks.xstream.annotations.XStreamAsAttribute;
import com.thoughtworks.xstream.annotations.XStreamImplicit;

@XStreamAlias("table")
public class Table 
{
@XStreamAsAttribute
private String name;

@XStreamAsAttribute
private String comment;

@XStreamImplicit(itemFieldName="column")
private List<Column> columnList;

public String getName 
{
return name;
}

public void setName(String name) 
{
this.name = name;
}

public String getComment 
{
return comment;
}

public void setComment(String comment) 
{
this.comment = comment;
}

public List<Column> getColumnList 
{
return columnList;
}

public void setColumnList(List<Column> columnList) 
{
this.columnList = columnList;
}
}



import com.thoughtworks.xstream.annotations.XStreamAlias;
import com.thoughtworks.xstream.annotations.XStreamAsAttribute;

@XStreamAlias("column")
public class Column 
{
@XStreamAsAttribute
private String name;

@XStreamAsAttribute
private String type;

@XStreamAsAttribute
private Integer length;

@XStreamAsAttribute
private String comment;

public String getName 
{
return name;
}

public void setName(String name) 
{
this.name = name;
}

public String getType 
{
return type;
}

public void setType(String type) 
{
this.type = type;
}

public Integer getLength 
{
return length;
}

public void setLength(Integer length) 
{
this.length = length;
}

public String getComment 
{
return comment;
}

public void setComment(String comment) 
{
this.comment = comment;
}
}

3. 转换代码

        XStream xstream = new XStream;
        xstream.processAnnotations(new Class[]{Table.class, Column.class});
        Table table = (Table)xstream.fromXML(xmlContent); // xmlContent为xml内容