XStream的基础学习使用

**公司最近用WebService获取数据，数据格式是xml的，所以需要将xml转换成对象 下面是初步对XStream的一些学习使用！****程序需要两个jar包 分别是****运行Main类 有几个方法 根据方法名和注释你能很容易的找到你想要的**package com.xstream.demo;import java.io.File;import java.io.IOException;import java.io.PrintWriter;import java.util.ArrayList;import java.util.List;import com.thoughtworks.xstream.XStream;import com.thoughtworks.xstream.io.xml.DomDriver;public class Demo { public static void main(String[] args) throws Exception { /*//对象转换成xml字符串 String xml = beanToXml(); //对象转换成xml文件 creatXMlFile(new File("1.xml")); //xml字符串转换成对象 xmlToBean(xml);*/ //xml文件转换成对象// xmlToBean(new File("1.xml"));// List2Xml();// creatXMlFile(new File("2.xml")); xmlToList(new File("2.xml")); }/** * 将xml字符串转换成对象 *@param xml */ public static void xmlToBean(String xml){ XStream xStream = new XStream(new DomDriver());//注解生效 xStream.processAnnotations(new Class[]{Student.class}); //将xml字符串转换成对象 Student student = (Student)xStream.fromXML(xml); System.out.println(student); } /** *将xml文件转换成对象 *@param xmlFile */ public static void xmlToBean(File xmlFile) {XStream xStream=new XStream(new DomDriver());xStream.processAnnotations(new Class[]{Student.class});Student student = (Student)xStream.fromXML(xmlFile);System.out.println(student);} /** *对象转换成xml字符串 *@return */ private static String beanToXml() {//定义bean Student student=new Student();student.setName("张三");student.setAge("18"); student.setSex("男"); List<StudentInfo> stuInfoList = new ArrayList<StudentInfo>(); stuInfoList.add(new StudentInfo("157","山西")); stuInfoList.add(new StudentInfo("158","河南")); student.setStuInfoList(stuInfoList); //创建XStream对象 XStream stream=new XStream();// 注册使用了注解的Student类stream.processAnnotations(new Class[]{Student.class}); //转换为xml（默认格式化）String xml=stream.toXML(student); return xml; }/** * 对象转换成xml文件 *@param file *@throws IOException */ private static void creatXMlFile(File file) throws IOException {String xml=List2Xml();String xmlContent="<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";if (!file.exists()) {file.getParentFile().mkdirs();// file.createNewFile();}xmlContent+=xml;//可以将xml字符串写入文件,要创建新文件，必须保证其父路径存在哦,单级目录自动创建文件PrintWriter pw=new PrintWriter(file); pw.write(xmlContent);pw.close();//如果要实现追加// BufferedWriter bw=new BufferedWriter(new FileWriter(file ,true)); //那么此时必须保证xml头部申明只能一次/* if (file.length()==0) { xmlContent+=xml;}else{xmlContent=xml;}*/}/** * 将List转换成xml */ public static String List2Xml(){ List<Student> stuList = new ArrayList<Student>(); Student s1 = new Student(); s1.setName("何"); s1.setAge("18"); s1.setSex("男"); List<StudentInfo> stuInfoList = new ArrayList<StudentInfo>(); stuInfoList.add(new StudentInfo("1111","山西")); stuInfoList.add(new StudentInfo("2222","北京")); s1.setStuInfoList(stuInfoList);Student s2 = new Student(); s2.setName("王"); s2.setAge("18"); s2.setSex("女"); stuInfoList = new ArrayList<StudentInfo>(); stuInfoList.add(new StudentInfo("3333","太原")); stuInfoList.add(new StudentInfo("4444","运城")); s2.setStuInfoList(stuInfoList);Student s3 = new Student(); s3.setName("hah"); s3.setAge("18"); s3.setSex("女"); stuInfoList = new ArrayList<StudentInfo>(); stuInfoList.add(new StudentInfo("9999","aaaa")); stuInfoList.add(new StudentInfo("8888","bbbb")); s3.setStuInfoList(stuInfoList);stuList.add(s1); stuList.add(s2); stuList.add(s3);XStream stream = new XStream();// 注册使用了注解的Student类 stream.processAnnotations(new Class[]{Student.class}); //转换为xml（默认格式化）String xml=stream.toXML(stuList); System.out.println(xml); return xml; } /** * 将xml文件转换成对象 *@param xmlFile */ public static void xmlToList(File xmlFile) {XStream xStream=new XStream(new DomDriver());xStream.processAnnotations(new Class[]{Student.class});List<Student> stuList = (List<Student>) xStream.fromXML(xmlFile); System.out.println(stuList); } }**实体类 Student**package com.xstream.demo;import java.util.ArrayList;import java.util.List;import com.thoughtworks.xstream.annotations.XStreamAlias;import com.thoughtworks.xstream.annotations.XStreamImplicit;@XStreamAlias("student")public class Student {private String name; private String age;private String sex;@XStreamImplicit private List<StudentInfo> stuInfoList;public List<StudentInfo> getStuInfoList() { return stuInfoList; } public void setStuInfoList(List<StudentInfo> stuInfoList) { this.stuInfoList = stuInfoList; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAge() { return age; } public void setAge(String age) { this.age = age; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } @Override public String toString() { return "Student [name=" + name + ", age=" + age + ", sex=" + sex + ", stuInfoList=" + stuInfoList + "]"; }}**实体类Student的详细附加类 也是一个实体类StudentInfo**package com.xstream.demo;import com.thoughtworks.xstream.annotations.XStreamAlias;@XStreamAlias("studentInfo")public class StudentInfo {private String phone; private String address;public StudentInfo(String phone,String address){ this.phone = phone; this.address = address; }public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } @Override public String toString() { return "StudentInfo [phone=" + phone + ", address=" + address + "]"; }}**紧接着 通过代码生成的两个xml文件**1.<?xml version="1.0" encoding="UTF-8"?><student><name>张三</name><age>18</age><sex>男</sex><studentInfo><phone>157</phone><address>山西</address></studentInfo><studentInfo><phone>158</phone><address>河南</address></studentInfo><studentInfo><phone>000</phone><address>北京</address></studentInfo></student>**第二个xml**<?xml version="1.0" encoding="UTF-8"?><list><student><name>何睿</name><age>18</age><sex>男</sex><studentInfo><phone>1111</phone><address>山西</address></studentInfo><studentInfo><phone>2222</phone><address>北京</address></studentInfo></student><student><name>王昱辉</name><age>18</age><sex>女</sex><studentInfo><phone>3333</phone><address>太原</address></studentInfo><studentInfo><phone>4444</phone><address>运城</address></studentInfo></student><student><name>hah</name><age>18</age><sex>女</sex><studentInfo><phone>9999</phone><address>aaaa</address></studentInfo><studentInfo><phone>8888</phone><address>bbbb</address></studentInfo></student></list>