java与commons_使用apache.commons.betwixt实现XML与Java对象互转
##关于betwixt
##如何引用
在maven项目中添加以下依赖
commons-betwixt
commons-betwixt
0.8
##注意事项 转化过程对 大小写是敏感的，
例如 XML中的结点名称是大写的，而Java类中的成员变量是小写的。那么转换将不会成功，得到的结点值是空的。
##核心代码
###创建一个测试对象
package com.icim.entity;
public class TestObj {
private String name;
private Integer age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
/**
* 必须有一个空的构造方法，否则会报错
*/
public TestObj() {
}
public TestObj(String name, Integer age) {
super();
this.name = name;
this.age = age;
}
@Override
public String toString() {
return "TestObj [name=" + name + ", age=" + age + "]";
}
}
###转换对象
package com.icim.util;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import org.apache.commons.betwixt.io.BeanReader;
import org.apache.commons.betwixt.io.BeanWriter;
import org.apache.log4j.Logger;
import com.icim.entity.TestObj;
public class XmlParseUtil {
private static final Logger logger = Logger.getLogger(XmlParseUtil.class);
private static final String XML_ROOT_NODE_NAME = "TRANSACTION";
public static final String XML_HEADER = "<?xml version='1.0' encoding='UTF-8' ?>";
/**
* 将XML字符串 转换成 对象
* @param strInMsg : XML内容
* @param clazz
* @return
*/
public static Object inStr2Obj(String strInMsg, @SuppressWarnings("rawtypes") Class clazz) {
BeanReader beanReader = new BeanReader();
Object parse = null;
StringReader xmlReader = new StringReader(strInMsg);
beanReader.getXMLIntrospector().getConfiguration().setAttributesForPrimitives(false);
beanReader.getBindingConfiguration().setMapIDs(false);
try {
beanReader.registerBeanClass(XML_ROOT_NODE_NAME, clazz);
parse = beanReader.parse(xmlReader);
} catch (Exception ex) {
logger.error(ex.toString());
}
return parse;
}
/**
* 将 对象 转换成 XML字符串
* @param inObj
* @return
*/
public static String obj2Str(Object inObj) {
StringWriter sw = new StringWriter();
BeanWriter beanWriter = new BeanWriter(sw);
sw.write(XML_HEADER);
try {
beanWriter.setEndOfLine("");
beanWriter.getBindingConfiguration().setMapIDs(false);
beanWriter.getXMLIntrospector().getConfiguration().setAttributesForPrimitives(false);
beanWriter.write(XML_ROOT_NODE_NAME, inObj);
} catch (Exception e) {
logger.error(e.toString());
}
return sw.toString();
}
/**
* 将XML文件转换成 对象
* @param fileName
* @param clazz
* @return
*/
public static Object file2Object(String fileName, Class clazz) {
String fileContent = file2String(fileName);
return inStr2Obj(fileContent, clazz);
}
/**
* 将XML文件转换成 对象
* @param fileName
* @param clazz
* @return
*/
public static Object file2Object(File file, Class clazz) {
String fileContent = file2tring(file);
return inStr2Obj(fileContent, clazz);
}
/**
* 读取文件全部内容
* @param fileName
* @return
*/
private static String file2String(String fileName) {
File file = new File(fileName);
return file2tring(file);
}
/**
* 读取文件全部内容
* @param file
* @return
*/
private static String file2tring(File file) {
String encoding = "ISO-8859-1";
Long filelength = file.length();
byte[] filecontent = new byte[filelength.intValue()];
try {
FileInputStream in = new FileInputStream(file);
in.read(filecontent);
in.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
return new String(filecontent, encoding);
} catch (UnsupportedEncodingException e) {
System.err.println("The OS does not support " + encoding);
e.printStackTrace();
return null;
}
}
//测试方法
public static void main(String[] args) {
TestObj obj = new TestObj("xiaoming", 18);
String xmlString = XmlParseUtil.obj2Str(obj);
System.out.println(xmlString);
TestObj obj2 = (TestObj) XmlParseUtil.inStr2Obj(xmlString, TestObj.class);
System.out.println(obj2);
}
}
输出结果
<?xml version='1.0' encoding='UTF-8' ?>18xiaoming
TestObj [name=xiaoming, age=18]