XStream变换Java对象与XML

XStream转换Java对象与XML
1.引入需要的jar包，在pom.xml中配置依赖

<dependency><groupId>com.thoughtworks.xstream</groupId><artifactId>xstream</artifactId><version>1.4.2</version></dependency>

2.创建要转换的实例类，本文以简单的硬件信息为例

package com.ajita.xstream;import com.thoughtworks.xstream.annotations.XStreamAlias;import com.thoughtworks.xstream.annotations.XStreamAsAttribute;@XStreamAlias("DiskInfo")public class DiskInfo {@XStreamAsAttribute@XStreamAlias("diskName")private String name;private int totalSize;private int avilableSize;private int usedSize;public String getName() {return name;}public void setName(String name) {this.name = name;}public int getTotleSize() {return totalSize;}public void setTotleSize(int totleSize) {this.totalSize = totleSize;}public int getAvilableSize() {return avilableSize;}public void setAvilableSize(int avilableSize) {this.avilableSize = avilableSize;}public int getUserSize() {return usedSize;}public void setUserSize(int userSize) {this.usedSize = userSize;}public String toString() {StringBuilder sb = new StringBuilder();sb.append(name + "\r\n");sb.append("TotalSize:" + totalSize + "|Used Size:" + usedSize+ "|Available Size:" + avilableSize);return sb.toString();}}package com.ajita.xstream;import java.util.List;import com.thoughtworks.xstream.annotations.XStreamAlias;@XStreamAlias("HardwareInfo")public class HardwareInfo {private String cpuInfo;private String networkInfo;private List<DiskInfo> diskInfos;public String getCpuInfo() {return cpuInfo;}public void setCpuInfo(String cpuInfo) {this.cpuInfo = cpuInfo;}public String getNetworkInfo() {return networkInfo;}public void setNetworkInfo(String networkInfo) {this.networkInfo = networkInfo;}public List<DiskInfo> getDiskInfos() {return diskInfos;}public void setDiskInfos(List<DiskInfo> diskInfos) {this.diskInfos = diskInfos;}public String toString() {StringBuilder sb = new StringBuilder();sb.append(cpuInfo);sb.append("\r\n");sb.append(networkInfo);sb.append("\r\n");for (DiskInfo disk : diskInfos) {sb.append(disk.toString());sb.append("\r\n");}return sb.toString();}}

3.新建测试代码

package com.ajita.xstream;import java.util.ArrayList;import com.thoughtworks.xstream.XStream;public class TestXStream {/** * @param args */public static void main(String[] args) {DiskInfo disk1 = new DiskInfo();disk1.setName("D:\");disk1.setTotleSize(100);disk1.setUserSize(20);disk1.setAvilableSize(80);DiskInfo disk2 = new DiskInfo();disk2.setName("E:\");disk2.setTotleSize(200);disk2.setUserSize(40);disk2.setAvilableSize(160);ArrayList<DiskInfo> diskInfos = new ArrayList<DiskInfo>();diskInfos.add(disk1);diskInfos.add(disk2);HardwareInfo hwInfo = new HardwareInfo();hwInfo.setCpuInfo("cpu info is ...");hwInfo.setNetworkInfo("network info is ...");hwInfo.setDiskInfos(diskInfos);XStream xStream = new XStream();xStream.autodetectAnnotations(true);String xml = xStream.toXML(hwInfo);System.out.println(xml);HardwareInfo info2 = (HardwareInfo) xStream.fromXML(xml);System.out.println(info2);}}

输出如下：

<HardwareInfo>  <cpuInfo>cpu info is ...</cpuInfo>  <networkInfo>network info is ...</networkInfo>  <diskInfos>    <DiskInfo diskName="D:">      <totalSize>100</totalSize>      <avilableSize>80</avilableSize>      <usedSize>20</usedSize>    </DiskInfo>    <DiskInfo diskName="E:">      <totalSize>200</totalSize>      <avilableSize>160</avilableSize>      <usedSize>40</usedSize>    </DiskInfo>  </diskInfos></HardwareInfo>cpu info is ...network info is ...D:\TotalSize:100|Used Size:20|Available Size:80E:\TotalSize:200|Used Size:40|Available Size:160

4.常用XStream注解
1）@XStreamAlias注解可在类与属性上使用设置名称,相当于: xstream.alias("blog", Blog.class);
2）@XStreamImplicit去集合节点名:相当于 xstream.addImplicitCollection(Blog.class, "entries");
3） @XStreamConverter(SingleValueCalendarConverter.class)
    private Calendar createdTime = new GregorianCalendar();

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