java字符串和对象相互转化

<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>

import org.codehaus.jackson.map.DeserializationConfig;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.map.SerializationConfig;
import org.codehaus.jackson.map.annotate.JsonSerialize;
import org.codehaus.jackson.map.ser.impl.SimpleFilterProvider;
import org.codehaus.jackson.type.TypeReference;

/**
* String和对象相互转化工具
*/
public class JsonMapper {

private static ObjectMapper objectMapper = new ObjectMapper();

static {
// config
objectMapper.disable(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES);
objectMapper.configure(SerializationConfig.Feature.FAIL_ON_EMPTY_BEANS, false);
objectMapper.setFilters(new SimpleFilterProvider().setFailOnUnknownId(false));
objectMapper.setSerializationInclusion(JsonSerialize.Inclusion.NON_EMPTY);
}

public static <T> String obj2String(T src) {
if (src == null) {
return null;
}
try {
return src instanceof String ? (String) src : objectMapper.writeValueAsString(src);
} catch (Exception e) {
log.warn("parse object to String exception, error:{}", e);
return null;
}
}

public static <T> T string2Obj(String src, TypeReference<T> typeReference) {
if (src == null || typeReference == null) {
return null;
}
try {
return (T) (typeReference.getType().equals(String.class) ? src : objectMapper.readValue(src, typeReference));
} catch (Exception e) {
log.warn("parse String to Object exception, String:{}, TypeReference<T>:{}, error:{}", src, typeReference.getType(), e);
return null;
}
}
}