java字符串和对象相互转化

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利用jackson-mapper-asl.jar实现对象和json格式的字符串之间的相互转换,在pom.xml文件中引入：

<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>

代码实现：

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;        }    }}

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