小编use*_*131的帖子

在解析文件并转换为 POJO 时遇到问题。以下异常我得到。

com.fasterxml.jackson.databind.JsonMappingException：无法构造 java.util.LinkedHashMap 的实例：没有从字符串值反序列化的字符串参数构造函数/工厂方法 ('{\"hosturl_path\":\"/images\"} ')

示例 json 文件：

{"test": [{
     "a112a": "testhost", 
     "a112b": "{\"hosturl_path\":\"/images\"}"
}]}

POJO -

import java.io.Serializable;
import java.util.Map;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;

@JsonInclude(JsonInclude.Include.NON_NULL)
@JsonIgnoreProperties(ignoreUnknown = true)
@JsonAutoDetect(fieldVisibility = JsonAutoDetect.Visibility.ANY, getterVisibility = JsonAutoDetect.Visibility.ANY,
        setterVisibility = JsonAutoDetect.Visibility.ANY)
public class TestPojo implements Serializable
{
    private static final long serialVersionUID = 638312139361412L;

    @JsonProperty("a112a")
    private String host;

    @JsonProperty("a112b")
    private Map<String,String> parameterMap;

    public TestPojo()
    {
    }

    public TestPojo(String host, Map<String, String> parameterMap)
    {
        this.host = host; …