JsonMappingException - ITeye问答

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JsonMappingException0

ObjectMapper mapper = new ObjectMapper(); 
		JsonNode jsonNode = mapper.readTree(json); 
		JsonNode jn = jsonNode.get("indexs");
		System.out.println(jn.toString());
		
		Indexs p = mapper.readValue(json, Indexs.class);

org.codehaus.jackson.map.JsonMappingException: No suitable constructor found for type [simple type, class com.abc.search.vo.IndexField]: can not instantiate from JSON object (need to add/enable type information?)
 at [Source: java.io.StringReader@33a626ac; line: 1, column: 70] (through reference chain: com.abc.search.vo.Indexs["indexs"]->com.abc.search.vo.Index["indexFields"])

详细问题:http://www.iteye.com/problems/94592

问题补充：IndexField 类
/**
*
*/
package com.abc.search.vo;

import java.io.Serializable;
import java.util.Date;

public class IndexField implements Serializable {
private static final long serialVersionUID = 2140557360587491345L;

public static final int TYPE_STRING = 1;
public static final int TYPE_LONG = 2;
public static final int TYPE_INT = 3;

public static final String FIELD_ID = "index_id";
public static final String FIELD_CREATETIME = "index_createTime";

private String name;
private String strValue;
private long longValue;
private int intValue;
private int type;
private boolean analyzed;
private boolean highlight;

public IndexField(){}

public IndexField(String name, String value) {
this(name, value, true, true);
}

public IndexField(String name, String value, boolean analyzed, boolean highlight) {
this.name = name;
this.strValue = value != null ? value : "";
this.type = TYPE_STRING;
this.analyzed = analyzed;
this.highlight = highlight;
}

public IndexField(String name, Date value){
this.name = name;
this.longValue = value.getTime();
this.strValue = String.valueOf(value);
this.type = TYPE_LONG;
this.analyzed = false;
this.highlight = false;
}

public IndexField(String name, long value){
this.name = name;
this.longValue = value;
this.strValue = String.valueOf(value);
this.type = TYPE_LONG;
this.analyzed = false;
this.highlight = false;
}

public IndexField(String name, int value){
this.name = name;
this.intValue = value;
this.strValue = String.valueOf(value);
this.type = TYPE_INT;
this.analyzed = false;
this.highlight = false;
}

public String getName() {
return name;
}

public int getType() {
return type;
}

public String getStrValue() {
return strValue;
}

public long getLongValue() {
return longValue;
}

public int getIntValue() {
return intValue;
}

public boolean isAnalyzed() {
return analyzed;
}

public boolean isHighlight() {
return highlight;
}
}