1.無法解析Java實體類的setMessage 方法

public class ResultGenerator {
    private static final String DEFAULT_SUCCESS_MESSAGE = "SUCCESS";

    public static Result genSuccessResult(StringBuffer url) {
        return new Result()
                .setCode(ResultCode.SUCCESS)
                .setDocument(url.toString())
                .setMessage(DEFAULT_SUCCESS_MESSAGE);
    }

    public static Result genSuccessResult(StringBuffer url, Object data) {
        return new Result()
                .setCode(ResultCode.SUCCESS)
                .setDocument(url.toString())
                .setMessage(DEFAULT_SUCCESS_MESSAGE)
                .setData(data);
    }

    public static Result genFailResult(StringBuffer url, String message) {
        return new Result()
                .setCode(ResultCode.FAIL)
                .setDocument(url.toString())
                .setMessage(message);
    }
}

這里的 .setMessage(DEFAULT_SUCCESS_MESSAGE) 出現問題。因為由下面代碼可知

Result.java

private int code;
    private String message;
    private Object data;
    private String document;
    public Result setCode(ResultCode resultCode) {
        this.code = resultCode.code;
        return this;
    }
//這里省略set/get方法

因為set方法的返回值是void 所以無法再繼續調用Result的方法

 

修改后的Result.java

public class Result {
    private int code;
    private String message;
    private Object data;
    private String document;
    public Result setCode(ResultCode resultCode) {
        this.code = resultCode.code;
        this.message = resultCode.message;
        return this;
    }

    public int getCode() {
        return code;
    }

    public Result setCode(int code) {
        this.code = code;
        return this;
    }

    public String getMessage() {
        return message;
    }

    public Result setMessage(String message) {
        this.message = message;
        return this;
    }

    public Object getData() {
        return data;
    }

    public Result setData(Object data) {
        this.data = data;
        return this;
    }

    public String getDocument() {
        return document;
    }

    public Result setDocument(String document) {
        this.document = document;
        return this;
    }
}