NumberFormatException: For input string: "null"

标签：mdt   puts   数字   xxx   except   ctc   stat   use   person   

日志: 

[INFO-2016/08/04/16/:21/:25]ProjectCommonFormController.(78) - 审批[同意]入参-[string]commonFormDtoStr ===={"commonForm":{"id":"1101115577946385"},"taskId":"322055","wfInstanceId":"1101115577859311","content":"","businessKey":"1101115577946385","projectId":"null","cityId":"null"}
[ERROR-2016/08/04/16/:21/:25]XXXXFormController.(91) - 审批流程出错!For input string: "null"
com.alibaba.fastjson.JSONException: For input string: "null"
        at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:467)
        at com.alibaba.fastjson.JSON.parseObject(JSON.java:206)
        at com.alibaba.fastjson.JSON.parseObject(JSON.java:166)
        at com.alibaba.fastjson.JSON.parseObject(JSON.java:287)
        at com.boa.weixin.controller.costmanager.expenses.ProjectCommonFormController.approvalCommonForm(ProjectCommonFormController.java:79)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)

      ...................     
Caused by: java.lang.NumberFormatException: For input string: "null"
        at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
        at java.lang.Long.parseLong(Long.java:441)
        at java.lang.Long.parseLong(Long.java:483)
        at com.alibaba.fastjson.util.TypeUtils.castToLong(TypeUtils.java:361)
        at com.alibaba.fastjson.parser.deserializer.LongFieldDeserializer.parseField(LongFieldDeserializer.java:44)
        at com.alibaba.fastjson.parser.deserializer.ASMJavaBeanDeserializer.parseField(ASMJavaBeanDeserializer.java:81)
        at com.alibaba.fastjson.parser.deserializer.ASMJavaBeanDeserializer$InnerJavaBeanDeserializer.parseField(ASMJavaBeanDeserializer.java:92)
        at com.alibaba.fastjson.parser.deserializer.JavaBeanDeserializer.deserialze(JavaBeanDeserializer.java:231)
        at com.alibaba.fastjson.parser.deserializer.ASMJavaBeanDeserializer.deserialze(ASMJavaBeanDeserializer.java:31)
        at Fastjson_ASM_CommonFormDto_67.deserialze(Unknown Source)
        at com.alibaba.fastjson.parser.DefaultJSONParser.parseObject(DefaultJSONParser.java:463)

package com.boa.test;

import org.springframework.core.convert.ConversionService;
import org.springframework.core.convert.support.DefaultConversionService;

/**
 * Created by boa on 2016/8/4.
 @desc  用于测试""串转Integer对象的转换异常问题
 */
public class ExceptionForInputStringNull {
    

    public static void main(String[] args) {
        Person p = new Person();
        String str = "";
      
        //spirng的转换器可以将""转换成Integer的null对象.
        ConversionService cs = new DefaultConversionService();
        Integer integer = cs.convert(str, Integer.class);

      //自行去把""转换成integer对象会报异常
      //Integer integer = Integer.valueOf(str);

      //apache的转换类也不行
      //org.apache.commons.beanutils.Converter con = new IntegerConverter();
      //Integer integer = (Integer)con.convert(Integer.class, str);

        p.setAge(integer);
        System.out.println(p.getAge());
    }
}


class Person {
    Integer age;

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}

NumberFormatException: For input string: "null"

标签：mdt   puts   数字   xxx   except   ctc   stat   use   person   

原文地址：http://www.cnblogs.com/duenboa/p/6665349.html