Java Json/xml 序列化和反序列化 工具：JsonTools 和 simpleframework 附帶執行個體

 Java Json/xml 序列化和反序列化： 工具JsonTools 和 simpleframework 

1. xml 序列化反序列化工具：simpleframework  功能非常強大，使用起來非常簡單，自己可以百度一下

使用方法：首先根據xml檔案建好java bean ，可以是非常複雜的java bean；  對應的xml檔案和java bean 見文章尾部

導入：

import org.simpleframework.xml.Serializer;

import org.simpleframework.xml.core.Persister;

直接使用：

File file = new File("c://mystd.xml");

  Serializer serializer = new Persister();

//反序列化

  Bean rule=serializer.read(Bean.class, file);

//序列化

serializer.write(rule, file);

下面主要介紹json的序列化反序列化 工具

2.Json 工具

xml 序列化反序列化工具：JsonTools JsonTools是一個不錯的JSON序列化和反序列化功能包，在這裡可以下載下傳到它： http://jsontools.berlios.de/。 使用介紹：        //序列化        JSONValue jsonValue = JSONMapper.toJSON( bean);  

        String jsonStr = jsonValue.render(true);   //是否格式化

        System.out.println(jsonStr);  

        //反序列化 

        JSONParser parser = new JSONParser(new StringReader(jsonStr));  

        L2Rule bean = (L2Rule) JSONMapper.toJava(parser.nextValue(), L2Rule.class);  

原始xml檔案： <L2Rule>

<Sheet Type="BS">

 <Table>

  <Row ItemName="Total assets" USID="USGB123450" Level="0"/>

  <Row ItemName="Total current assets" USID="USGB123451"  Level="1"/>

  <Row ItemName="Cash and cash equivalents" USID="USGB123452" Level="2" />

  <Row ItemName="Accounts receivable, net of allowance for bad debts of " USID="USGB123453" Level="2" />

  <Row ItemName="Current assets" USID="USGB123454" Level="2" />

    </Table>

</Sheet>

</L2Rule> 解析後的json： {"sheet":[{"tables":{"rows":[{"itemName":"Total assets","level":"0","usid":"USGB123450"},{"itemName":"Total current assets","level":"1","usid":"USGB123451"},{"itemName":"Cash and cash equivalents","level":"2","usid":"USGB123452"},{"itemName":"Accounts receivable, net of allowance for bad debts of ","level":"2","usid":"USGB123453"},{"itemName":"Current assets","level":"2","usid":"USGB123454"}]},"type":"BS"}]}

 加格式： {

   "sheet" :

      [

         {

            "tables" :

               {

                  "rows" :

                     [

                        {

                           "itemName" : "Total assets",

                           "level" : "0",

                           "usid" : "USGB123450"

                        },

                        {

                           "itemName" : "Total current assets",

                           "level" : "1",

                           "usid" : "USGB123451"

                        },

                        {

                           "itemName" : "Cash and cash equivalents",

                           "level" : "2",

                           "usid" : "USGB123452"

                        },

                        {

                           "itemName" : "Accounts receivable, net of allowance for bad debts of ",

                           "level" : "2",

                           "usid" : "USGB123453"

                        },

                        {

                           "itemName" : "Current assets",

                           "level" : "2",

                           "usid" : "USGB123454"

                        }

                     ]

               },

            "type" : "BS"

         }

      ]

}

對應的bean： L2Rule.java import org.simpleframework.xml.ElementList;

import org.simpleframework.xml.Root;

@Root(name="L2Rule")

public class L2Rule

{

@ElementList(name="Sheet",required=false,inline=true)

public List<Sheet> sheet = new LinkedList<Sheet>();

public List<Sheet> getSheet()

{

return sheet;

}

public void setSheet(List<Sheet> sheet)

{

this.sheet = sheet;

}

} Sheet.java import org.simpleframework.xml.Attribute;

import org.simpleframework.xml.Element;

import org.simpleframework.xml.Root;

@Root(name="Sheet")

public class Sheet

{

@Element(name="Table",required=false)

public Table tables = new Table();

@Attribute(name="Type",required=false)

public String type;

public Table getTables()

{

return tables;

}

public void setTables(Table tables)

{

this.tables = tables;

}

public String getType()

{

return type;

}

public void setType(String type)

{

this.type = type;

}

} Table.java import java.util.LinkedList;

import java.util.List;

import org.simpleframework.xml.ElementList;

import org.simpleframework.xml.Root;

@Root(name="Table")

public class Table

{

@ElementList(name="Row",required=false,inline=true)

public List<Row> rows = new LinkedList<Row>();

public List<Row> getRows()

{

return rows;

}

public void setRows(List<Row> rows)

{

this.rows = rows;

}

} Row.java import org.simpleframework.xml.Attribute;

import org.simpleframework.xml.Root;

@Root(name="Row")

public class Row

{

@Attribute(name="ItemName",required=true)

public String itemName;

@Attribute(name="USID",required=true)

public String usid;

@Attribute(name="Level",required=true)

public String level;

public String getItemName()

{

return itemName;

}

public void setItemName(String itemName)

{

this.itemName = itemName;

}

public String getUsid()

{

return usid;

}

public void setUsid(String usid)

{

this.usid = usid;

}

public String getLevel()

{

return level;

}

public void setLevel(String level)

{

this.level = level;

}

}  下一遍将介紹将樹形資料讀取成json格式  Sunny liu 2009-11-19