解析json数据，将json转为实体类

public class TestFASTJSON {

    public static void jsonToT(){
        String param = "{\"username\":\"17788332570\",\"pwd\":\"123456\"}";
        RegisterParam registerParam = JSONObject.parseObject(param, RegisterParam.class);
        System.out.println(registerParam);
    }
    public static void main(String[] args) {
        jsonToT();

    }
}

RegisterParam

public class RegisterParam {
    private String username;
    private String pwd;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPwd() {
        return pwd;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }

    @Override
    public String toString() {
        return "RegisterParam{" +
                "username='" + username + '\'' +
                ", pwd='" + pwd + '\'' +
                '}';
    }
}

需要jar

    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.78</version>
    </dependency>