@JSONField使用

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：

package com.test.dto;

import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;

public class Child {
    private String childName;
    private String childAge;
    private String chileFather;

    public String getChildName() {
        return childName;
    }

    public void setChildName(String childName) {
        this.childName = childName;
    }

    public String getChildAge() {
        return childAge;
    }

    public void setChildAge(String childAge) {
        this.childAge = childAge;
    }

    public String getChileFather() {
        return chileFather;
    }

    public void setChileFather(String chileFather) {
        this.chileFather = chileFather;
    }

    @Override
    public String toString() {
        return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
    }
}

Controller来接收json串：

发送的json串：

package com.test.controller;

import com.test.dto.Child;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class TestController2 {

    /**
     * jsonField测试
     * @param child
     */
    @RequestMapping("/testJsonField.do")
    public void testJsonField(@RequestBody Child child){
        System.out.println(child);
    }
}

打印出来，看到是收不到的：

Child[childName=<null>,childAge=<null>,chileFather=<null>]

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:

package com.test.dto;

import com.fasterxml.jackson.annotation.JsonProperty;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;

public class Child {
    private String childName;
    private String childAge;
    private String chileFather;

    public String getChildName() {
        return childName;
    }

    @JsonProperty(value = "child_name")
    public void setChildName(String childName) {
        this.childName = childName;
    }

    public String getChildAge() {
        return childAge;
    }

    @JsonProperty(value = "child_age")
    public void setChildAge(String childAge) {
        this.childAge = childAge;
    }

    public String getChileFather() {
        return chileFather;
    }

    public void setChileFather(String chileFather) {
        this.chileFather = chileFather;
    }

    @Override
    public String toString() {
        return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
    }
}

这样能收到了:

Child[childName=小孩儿,childAge=4,chileFather=<null>]

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 class Child {
    private String childName;
    private String childAge;
    private String chileFather;

    public String getChildName() {
        return childName;
    }

    @JSONField(name="child_name")
    public void setChildName(String childName) {
        this.childName = childName;
    }

    public String getChildAge() {
        return childAge;
    }

    @JSONField(name="child_age")
    public void setChildAge(String childAge) {
        this.childAge = childAge;
    }

    public String getChileFather() {
        return chileFather;
    }

    public void setChileFather(String chileFather) {
        this.chileFather = chileFather;
    }

    @Override
    public String 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：

package com.test.dto;

import com.alibaba.fastjson.annotation.JSONField;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;

public class Child {
    private String childName;
    private String childAge;
    private String chileFather;

    public String getChildName() {
        return childName;
    }

    @JSONField(name="child_name")
    public void setChildName(String childName) {
        this.childName = childName;
    }

    public String getChildAge() {
        return childAge;
    }

    @JSONField(name="child_age")
    public void setChildAge(String childAge) {
        this.childAge = childAge;
    }

    @JSONField(serialize = false)
    public String getChileFather() {
        return chileFather;
    }

    public void setChileFather(String chileFather) {
        this.chileFather = chileFather;
    }

    @Override
    public String toString() {
        return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
    }
}

我们可以看到childFather字段没有被序列化：

-----