java jsonfield_@JSONField使用[通俗易懂]

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参考博客：http://www.cnblogs.com/yucy/p/9057049.html

1.经常遇到这种情况，传过来json的key名和我们javaBean的属性名不一样，导致接收不到：

Child类用来接收传过来的json串：

packagecom.test.dto;importorg.apache.commons.lang3.builder.ToStringBuilder;importorg.apache.commons.lang3.builder.ToStringStyle;public classChild {privateString childName;privateString childAge;privateString chileFather;publicString getChildName() {returnchildName;

}public voidsetChildName(String childName) {this.childName =childName;

}publicString getChildAge() {returnchildAge;

}public voidsetChildAge(String childAge) {this.childAge =childAge;

}publicString getChileFather() {returnchileFather;

}public voidsetChileFather(String chileFather) {this.chileFather =chileFather;

}

@OverridepublicString toString() {return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);

}

}

View Code

Controller来接收json串：

发送的json串：

packagecom.test.controller;importcom.test.dto.Child;importorg.springframework.stereotype.Controller;importorg.springframework.web.bind.annotation.RequestBody;importorg.springframework.web.bind.annotation.RequestMapping;

@Controllerpublic classTestController2 {/*** jsonField测试

*@paramchild*/@RequestMapping(“/testJsonField.do”)public voidtestJsonField(@RequestBody Child child){

System.out.println(child);

}

}

打印出来，看到是收不到的：

Child[childName=,childAge=,chileFather=]

2.对于这种@RequestBody的使用@JsonProperty将传过来的json key名能够映射到javaBean上：

Child:

packagecom.test.dto;importcom.fasterxml.jackson.annotation.JsonProperty;importorg.apache.commons.lang3.builder.ToStringBuilder;importorg.apache.commons.lang3.builder.ToStringStyle;public classChild {privateString childName;privateString childAge;privateString chileFather;publicString getChildName() {returnchildName;

}

@JsonProperty(value= “child_name”)public voidsetChildName(String childName) {this.childName =childName;

}publicString getChildAge() {returnchildAge;

}

@JsonProperty(value= “child_age”)public voidsetChildAge(String childAge) {this.childAge =childAge;

}publicString getChileFather() {returnchileFather;

}public voidsetChileFather(String chileFather) {this.chileFather =chileFather;

}

@OverridepublicString toString() {return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);

}

}

View Code

这样能收到了:

Child[childName=小孩儿,childAge=4,chileFather=]

3.当使用fastjson解析数据时。

1)Child类此时不加任何注解。

2)发送请求：http://localhost:8081/testJsonField.do?childStr={child_name:123, child_age:1}

3)controller接收：

可以看到此时是接受不到的。

4)我们在Child类属性的set方法上加上@JSONField注解，name来匹配json串中的key：

public classChild {privateString childName;privateString childAge;privateString chileFather;publicString getChildName() {returnchildName;

}

@JSONField(name=”child_name”)public voidsetChildName(String childName) {this.childName =childName;

}publicString getChildAge() {returnchildAge;

}

@JSONField(name=”child_age”)public voidsetChildAge(String childAge) {this.childAge =childAge;

}publicString getChileFather() {returnchileFather;

}public voidsetChileFather(String chileFather) {this.chileFather =chileFather;

}

@OverridepublicString toString() {return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);

}

}

再次接受就能收到了：

5)使用@JSONField(serialize = false) 在get方法上添加来过滤掉不需要序列化的字段：

Child类：

packagecom.test.dto;importcom.alibaba.fastjson.annotation.JSONField;importorg.apache.commons.lang3.builder.ToStringBuilder;importorg.apache.commons.lang3.builder.ToStringStyle;public classChild {privateString childName;privateString childAge;privateString chileFather;publicString getChildName() {returnchildName;

}

@JSONField(name=”child_name”)public voidsetChildName(String childName) {this.childName =childName;

}publicString getChildAge() {returnchildAge;

}

@JSONField(name=”child_age”)public voidsetChildAge(String childAge) {this.childAge =childAge;

}

@JSONField(serialize= false)publicString getChileFather() {returnchileFather;

}public voidsetChileFather(String chileFather) {this.chileFather =chileFather;

}

@OverridepublicString toString() {return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);

}

}

View Code

我们可以看到childFather字段没有被序列化：

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