使用jackson发生UnrecognizedPropertyException异常

使用的jackson版本为

jackson-databind-2.1.3.jar

jackson-annotations-2.1.2.jar

jackson-core-2.1.3.jar

在使用过程中发生了一个如下异常

com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException: Unrecognized field "age" (class test.json.TE), not marked as ignorable (3 known properties: , "id", "name", "flag"])
 at [Source: java.io.StringReader@18f5824; line: 1, column: 43] (through reference chain: test.json.TE["age"])
	at com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException.from(UnrecognizedPropertyException.java:79)
	at com.fasterxml.jackson.databind.DeserializationContext.reportUnknownProperty(DeserializationContext.java:579)
	at com.fasterxml.jackson.databind.deser.std.StdDeserializer.handleUnknownProperty(StdDeserializer.java:672)
	at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.handleUnknownProperty(BeanDeserializerBase.java:906)
	at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:328)
	at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:121)
	at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:2797)
	at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:1943)
	at test.json.TestJson.jsonToClass(TestJson.java:21)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:292)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

 测试代码如下：

package test.json;

import java.io.Serializable;

import org.apache.commons.lang.builder.ToStringBuilder;
import org.junit.Test;

import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;

public class TestJson {
	
	@Test
	public void jsonToClass() {
		String s = "{\"id\":1,\"name\":\"test\",\"flag\":true,\"age\":19}";
		
		ObjectMapper mapper = new ObjectMapper();
		//mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
		TE t;
		try {
			t = mapper.readValue(s, TE.class);
			System.out.println(ToStringBuilder.reflectionToString(t));
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

class TE implements Serializable {
	
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private long id;
	private String name;
	private boolean flag;
	//private int age;
	
	public long getId() {
		return id;
	}
	public void setId(long id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public boolean isFlag() {
		return flag;
	}
	public void setFlag(boolean flag) {
		this.flag = flag;
	}
	/*public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}*/
	
}

 原因是json的字符串中多了个age属性，在砖的时候TE类中没有此属性

这种情况是正常情况，一边改了，一边没改，该如何解决此问题

http://wiki.fasterxml.com/JacksonHowToIgnoreUnknown

这是查到的解决方法，我用的版本是2.1版本的，修改如下

package test.json;

import java.io.Serializable;

import org.apache.commons.lang.builder.ToStringBuilder;
import org.junit.Test;

import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;

public class TestJson {
	
	@Test
	public void jsonToClass() {
		String s = "{\"id\":1,\"name\":\"test\",\"flag\":true,\"age\":19}";
		
		ObjectMapper mapper = new ObjectMapper();
		mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
		TE t;
		try {
			t = mapper.readValue(s, TE.class);
			System.out.println(ToStringBuilder.reflectionToString(t));
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

class TE implements Serializable {
	
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private long id;
	private String name;
	private boolean flag;
	//private int age;
	
	public long getId() {
		return id;
	}
	public void setId(long id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public boolean isFlag() {
		return flag;
	}
	public void setFlag(boolean flag) {
		this.flag = flag;
	}
	/*public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}*/
	
}

 增加了

mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);