將行和列坐標轉換為JSON除錯器的插入符號位置

我正在構建一個小型 Java 實用程式（使用 Jackson）來捕獲 Java 檔案中的錯誤，其中一部分是文本區域，您可以在其中粘貼一些 JSON 背景關系，它會告訴您找到它的行和列：

我正在使用錯誤訊息將行和列作為字串取出并在界面中列印出來供使用它的人使用。

這是我正在使用的 JSON 示例，在“年齡”旁邊有一個故意錯誤，它缺少一個冒號：

    {
        "name": "mkyong.com",
        "messages": ["msg 1", "msg 2", "msg 3"],
        "age" 100
    }

我想要做的也是用青色突出顯示有問題的區域，為此，我有這個按鈕的代碼，用于驗證文本區域中插入的內容：

            cmdValidate.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
            
            functionsClass ops = new functionsClass();
            
            String JSONcontent = JSONtextArea.getText();
            
            Results obj = new Results();
            
            ops.validate_JSON_text(JSONcontent, obj);
            
            String result = obj.getResult();
            String caret = obj.getCaret();
            //String lineNum = obj.getLineNum();
            
            //showStatus(result);
            
            if(result==null) {
                textAreaError.setText("JSON code is valid!");
            } else {
                textAreaError.setText(result);
                
                Highlighter.HighlightPainter cyanPainter;
                cyanPainter = new DefaultHighlighter.DefaultHighlightPainter(Color.cyan);
                
                int caretPosition = Integer.parseInt(caret); 
                int lineNumber = 0;
                try {
                    lineNumber = JSONtextArea.getLineOfOffset(caretPosition);
                } catch (BadLocationException e2) {
                    // TODO Auto-generated catch block
                    e2.printStackTrace();
                }
                
                try {
                    JSONtextArea.getHighlighter().addHighlight(lineNumber, caretPosition   1, cyanPainter);
                } catch (BadLocationException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
            }
        }

        
    });
    
}

The "addHighlight" method works with a start range, end range and a color, which didn't become apparent to me immediately, thinking I had to get the reference line based on the column number. Some split functions to extract the numbers, I assigned 11 (in screenshot) to a caret value, not realizing that it only counts character positions from the beginning of the string and represents the end point of the range.

For reference, this is the class that does the work behind the scenes, and the error handling at the bottom is about extracting the line and column numbers. For the record, "x" is the error message that would generate out of an invalid file.

package parsingJSON;

import java.io.IOException;

import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

public class functionsClass extends JSONTextCompare {
    
    public boolean validate_JSON_text(String JSONcontent, Results obj) {
        
        boolean valid = false;
        
        try {
        
        ObjectMapper objMapper = new ObjectMapper();
        JsonNode validation = objMapper.readTree(JSONcontent);
        
        valid = true;
        
        }
        
        catch (JsonParseException jpe){
            
            String x = jpe.getMessage();
            printTextArea(x, obj);
            //return part_3;
            
        }
        catch (IOException ioe) {
            String x = ioe.getMessage();
            printTextArea(x, obj);
            //return part_3;
        }
        
        return valid;
        
        
    }
    public  void printTextArea(String x, Results obj) {
        // TODO Auto-generated method stub
        System.out.println(x);
        String err = x.substring(x.lastIndexOf("\n"));
        
        String parts[] = err.split(";");
        //String part 1 is the discarded leading edge that is the closing brackets of the JSON content
        String part_2 = parts[1];
        
        //split again to get rid of the closing square bracket
        String parts2[] = part_2.split("]");
        String part_3 = parts2[0];
        
        //JSONTextCompare feedback = new JSONTextCompare();
        
        //split the output to get the exact location of the error to communicate back and highlight it in the JSONTextCompare class
        
        //first need to get the line number from the output
        String[] parts_lineNum = part_3.split("line: ");
        String[] parts_lineNum_final = parts_lineNum[1].split(", column:");
        String lineNum = parts_lineNum_final[0];
        String[] parts_caret = part_3.split("column: ");
        String caret = parts_caret[1];
        
        System.out.println(caret);
        
        obj.setLineNum(lineNum);
        obj.setCaret(caret);
        obj.setResult(part_3);
        System.out.println(part_3);
        
    }

}

Screenshot for what the interface currently looks like:

長話短說 - 我如何將坐標 Line 4, Col 11 轉換為插入符號值（例如，為了論證，它的值為 189），我可以使用它來使熒光筆正常作業。某種自定義決議公式可能是可能的，但總的來說，這甚至可能嗎？

uj5u.com熱心網友回復：

我如何將坐標 Line 4, Col 11 轉換為插入符號值（例如它的值 189，

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在我清理完專案并對其進行評論后，我將在 GitHub 上發布該專案，稍后將提供指向該專案的鏈接，但就目前而言，希望這對處于類似情況的下一個開發人員有所幫助。

標籤：爪哇 json 摇摆

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