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Castor的使用

因为项目中使用了Castor（xml和对象间的转换），所以自己在网上找了一些资料练习了一下，现在把代码贴出来，留着以后看看！

这是用到的jar包，有一些是没用的！这都是在网上看的

一、（没有配置文件）

 1 public class DefaultCastor
 2 {
 3     //返回此抽象路径的绝对路径字符串
 4     public static final String xmlPath=new File("").getAbsolutePath()+"\src\CastorTest\";
 5     
 6     @org.junit.Test
 7     public void Test(){
 8 //        DefaultCastor test=new DefaultCastor();
 9         try
10         {
11             beanToxml();
12             xmlTobean();
13         } catch (MarshalException e)
14         {
15             // TODO Auto-generated catch block
16             e.printStackTrace();
17         } catch (ValidationException e)
18         {
19             // TODO Auto-generated catch block
20             e.printStackTrace();
21         } catch (IOException e)
22         {
23             // TODO Auto-generated catch block
24             e.printStackTrace();
25         }
26     }
27     /**
28      * 缺省用法没有配置文件
29      * 编组（marshalling）
30      * @throws IOException 
31      * @throws ValidationException 
32      * @throws MarshalException 
33      */
34     @SuppressWarnings({ "unchecked", "rawtypes" })
35     public static void beanToxml() throws IOException, MarshalException, ValidationException{
36         System.out.println(xmlPath+"路径------");
37         List friend=new ArrayList();
38         friend.add("zhangsan");
39         friend.add("lisi");
40         Map score=new HashMap();
41         score.put("1", "za");
42         score.put("2", "na");
43         String[] hobby={"a","b"};
44         UserBean user=new UserBean();
45         user.setName("fenghao");
46         user.setAge("24");
47          user.setFriends(friend);
48         user.setHobby(hobby);
49         user.setScore(score);
50         File file=new File(xmlPath+"test.xml");
51         Writer writer=new FileWriter(file);
52         Marshaller shaller=new Marshaller(writer);
53         shaller.setEncoding("utf-8");
54         shaller.marshal(user);
55         writer.flush();
56         writer.close();
57     } 
58     /**
59      * xml转成Bean
60      * 解组
61      * @throws FileNotFoundException 
62      * @throws ValidationException 
63      * @throws MarshalException 
64      */
65     public static void xmlTobean() throws FileNotFoundException, MarshalException, ValidationException{
66         File file=new File(xmlPath+"test.xml");
67         System.out.println(file.getAbsolutePath()+"文件路径");
68         Reader read=new FileReader(file);
69 //        InputStream in=new FileInputStream(file);
70         UserBean user=(UserBean)Unmarshaller.unmarshal(UserBean.class, read);
71         System.out.println("--------------/n");
72         System.out.println(user.getName()+"-------name/n"+user.getScore().get("1"));
73         System.out.println("---------------");
74         try
75         {
76             read.close();
77         } catch (IOException e)
78         {
79             // TODO Auto-generated catch block
80             e.printStackTrace();
81         }
82         
83     }
84     
85 }

二、

这是实体类

 1 package CastorTest;
 2 
 3 import java.util.ArrayList;
 4 import java.util.List;
 5 import java.util.Map;
 6 
 7 public class UserBean
 8 {
 9      private String name;
10      private String age;
11      private String[] hobby;
12      private Map score;
13      private List<String> friends;
14     public String getName()
15     {
16         return name;
17     }
18     public void setName(String name)
19     {
20         this.name = name;
21     }
22     public String getAge()
23     {
24         return age;
25     }
26     public void setAge(String age)
27     {
28         this.age = age;
29     }
30     public String[] getHobby()
31     {
32         return hobby;
33     }
34     public void setHobby(String[] hobby)
35     {
36         this.hobby = hobby;
37     }
38     public Map getScore()
39     {
40         return score;
41     }
42     public void setScore(Map score)
43     {
44         this.score = score;
45     }
46     public List<String> getFriends()
47     {
48         return friends;
49     }
50     public void setFriends(List<String> friends)
51     {
52         this.friends = friends;
53     }
54     public UserBean(String name, String age, String[] hobby, Map score,
55             List<String> friends)
56     {
57         super();
58         this.name = name;
59         this.age = age;
60         this.hobby = hobby;
61         this.score = score;
62         this.friends = new ArrayList<String>();
63     }
64     public UserBean()
65     {
66         super();
67         // TODO Auto-generated constructor stub
68     }
69     
70      
71 }

 1 package CastorTest;
 2 //这是工具类
 3 import java.io.BufferedReader;
 4 import java.io.File;
 5 import java.io.FileInputStream;
 6 import java.io.FileNotFoundException;
 7 import java.io.IOException;
 8 import java.io.InputStream;
 9 import java.io.InputStreamReader;
10 
11 
12 public class FileUtil
13 {
14     public static String  readFile(String filePath) throws IOException{
15         File file=new File(filePath);
16         BufferedReader read=new BufferedReader(new InputStreamReader(new FileInputStream(file),"utf-8"));
17         StringBuffer str=new StringBuffer((int)file.length()+300);//细节性优化方案
18         String line=null;
19         while((line=read.readLine())!=null){
20             str.append(line);
21         }
22         read.close();
23         return str.toString();
24     }
25     public static String readFile1(String filePath) throws IOException{
26         File file=new File(filePath);
27         InputStream in=null;
28         in=new FileInputStream(file);
29         byte b[]=new byte[(int)file.length()];//细节性优化方案
30         int len=in.read(b);
31         in.close();
32         String str=new String(b,0,len);
33         return str;
34     }
35 }

这是映射文件（描述xml和Bean的关系）

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapping PUBLIC "-//EXOLAB/Castor Mapping DTD Version 1.0//EN" "http://castor.org/mapping.dtd">
<mapping>
    <class name="CastorTest.UserBean" auto-complete="true">
       <map-to xml="dataset"/>
       <field name="name" type="java.lang.String">
          <bind-xml name="name" node="element"/>
       </field>
       <field name="age" type="java.lang.String">
         <bind-xml name="age" node="element"/>
       </field>
       <field name="hobby" type="java.lang.String" collection="array">
          <bind-xml name="hobby" node="element"/>
       </field>
       <field name="score" collection="map">
            <class name="org.exolab.castor.mapping.MapItem">
              <field name="key" type="java.lang.String">
                 <bind-xml name="key" node="attribute"/>
              </field>
              <field name="value" type="java.lang.String">
                 <bind-xml name="value" node="text"/>
              </field>
            </class>
       </field>
       <field name="friends" collection="arraylist" type="java.lang.String">
          <bind-xml name="friends" node="element"/>
       </field>
    </class>
</mapping>

这是运行代码：

  1 package CastorTest;
  2 
  3 
  4 
  5 import java.io.File;
  6 import java.io.FileNotFoundException;
  7 import java.io.FileReader;
  8 import java.io.FileWriter;
  9 import java.io.IOException;
 10 import java.io.Reader;
 11 import java.io.StringReader;
 12 import java.io.Writer;
 13 import java.util.ArrayList;
 14 import java.util.HashMap;
 15 import java.util.List;
 16 import java.util.Map;
 17 
 18 import org.exolab.castor.mapping.Mapping;
 19 import org.exolab.castor.mapping.MappingException;
 20 import org.exolab.castor.xml.MarshalException;
 21 import org.exolab.castor.xml.Marshaller;
 22 import org.exolab.castor.xml.Unmarshaller;
 23 import org.exolab.castor.xml.ValidationException;
 24 /**
 25  * 使用配置文件进行javaBean和xml的转化
 26  * @author issuser
 27  *
 28  */
 29 public class CastorUtil
 30 {
 31     private static final String filePath=new File("").getAbsolutePath()+"\src\CastorTest\";
 32     private static Mapping loadMapping(){
 33         Mapping mapping=new Mapping();
 34         try
 35         {
 36             mapping.loadMapping(filePath+"Mapping.xml");
 37         } catch (IOException e)
 38         {
 39             // TODO Auto-generated catch block
 40             e.printStackTrace();
 41         } catch (MappingException e)
 42         {
 43             // TODO Auto-generated catch block
 44             e.printStackTrace();
 45         }
 46         return mapping;
 47     }
 48     @org.junit.Test
 49      public void Test(){
 50          CastorUtil test=new CastorUtil();
 51          try
 52         {
 53 //            test.beanToXml();
 54             test.readXmlToBean();
 55         } catch (MarshalException e)
 56         {
 57             // TODO Auto-generated catch block
 58             e.printStackTrace();
 59         } catch (ValidationException e)
 60         {
 61             // TODO Auto-generated catch block
 62             e.printStackTrace();
 63         } catch (IOException e)
 64         {
 65             // TODO Auto-generated catch block
 66             e.printStackTrace();
 67         } catch (MappingException e)
 68         {
 69             // TODO Auto-generated catch block
 70             e.printStackTrace();
 71         }
 72      }
 73     @SuppressWarnings("unchecked")
 74     public void beanToXml() throws IOException, MarshalException, ValidationException, MappingException{
 75         List friend=new ArrayList();
 76         friend.add("zhangsan");
 77         friend.add("lisi");
 78         Map score=new HashMap();
 79         score.put("1", "za");
 80         score.put("2", "na");
 81         String[] hobby={"a","b"};
 82         UserBean user=new UserBean();
 83         user.setName("fenghao");
 84         user.setAge("24");
 85          user.setFriends(friend);
 86         user.setHobby(hobby);
 87         user.setScore(score);
 88         
 89         File file=new File(filePath+"test.xml");
 90         Writer writer=new FileWriter(file);
 91         Marshaller shaller=new Marshaller(writer);
 92         shaller.setEncoding("utf-8");
 93         shaller.setMapping(CastorUtil.loadMapping());
 94         shaller.marshal(user);
 95         writer.flush();
 96         writer.close();
 97         
 98     } 
 99     public void readXmlToBean() throws MappingException, IOException, MarshalException, ValidationException{
100         String xmlString=FileUtil.readFile1(filePath+"test.xml");
101         Reader read=new StringReader(xmlString);
102         Unmarshaller unshaller=new Unmarshaller(UserBean.class);
103         unshaller.setMapping(CastorUtil.loadMapping());
104         UserBean user=(UserBean)unshaller.unmarshal(read);
105         System.out.println(user.getName()+"--name--"+user.getAge()+"--age--");
106         read.close();
107     }
108 }

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原文地址：https://www.cnblogs.com/nihaofenghao/p/5431034.html