json串如何转成Java对象属性！

加油，新时代打工人！

josn {“pNum”:-0.1,“organicNum”:0,“kNum”:-0.1,“nNum”:-0.1}json串如何转成Java对象属性？

引入gson坐标

<dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.8.7</version>
</dependency>

public class TTestCropsVo extends BaseEntity {
    private static final long serialVersionUID = 1452884804579691451L;
//manureMethod josn {"pNum":-0.1,"organicNum":0,"kNum":-0.1,"nNum":-0.1}
    private String manureMethod;
//@SerializedName 注解对应json的key
    @SerializedName("organicNum")
    @Excel(name = "有机肥施肥量")
    private BigDecimal organicNum;

    @SerializedName("nNum")
    @Excel(name = "氮施肥量")
    private BigDecimal nNum;

    @SerializedName("pNum")
    @Excel(name = "磷施肥量")
    private BigDecimal pNum;

    @SerializedName("kNum")
    @Excel(name = "钾施肥量")
}

//将josn串转成java对象
List<TTestCropsVo> list1 = testReportTemplateService.selectTTestCropsByIdList(id);
Gson gson = new Gson();

for (int i = 0; i < list1.size(); i++) {
    TTestCropsVo obj = gson.fromJson(list1.get(i).getManureMethod(), TTestCropsVo.class);
    list1.get(i).setOrganicNum(obj.getOrganicNum());
    list1.get(i).setnNum(obj.getnNum());
    list1.get(i).setpNum(obj.getpNum());
    list1.get(i).setkNum(obj.getkNum());
}