多个TextField是用FocusAdapter进行验证,急急急.........................

Question

小弟想用FocusAdapter为3个TextField做焦点监听器,主要是监听在这3个TextField组件里输入的内容是否合法,不合法的话,只要焦点一转移回谈出一个对话框,并且焦点会回到那个内容不合法的TextField上

Answer 1

private void initComponents() {
        java.awt.GridBagConstraints gridBagConstraints;        jLabel1 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jLabel2 = new javax.swing.JLabel();
        jTextField2 = new javax.swing.JTextField();
        jLabel3 = new javax.swing.JLabel();
        jComboBox1 = new javax.swing.JComboBox();
        jLabel4 = new javax.swing.JLabel();
        jTextField4 = new javax.swing.JTextField();
        buttonPanel = new javax.swing.JPanel();
        okButton = new javax.swing.JButton();
        cancelButton = new javax.swing.JButton();        setLayout(new java.awt.GridBagLayout());        jLabel1.setText("\u516c\u53f8\u540d\uff1a");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.anchor = java.awt.GridBagConstraints.SOUTHEAST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 10, 0);
        add(jLabel1, gridBagConstraints);        jTextField1.setColumns(15);
        jTextField1.addFocusListener(new java.awt.event.FocusAdapter() {
            public void focusLost(java.awt.event.FocusEvent evt) {
                TextFieldFocusLost(evt);
            }
        });        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.anchor = java.awt.GridBagConstraints.SOUTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 10, 0);
        add(jTextField1, gridBagConstraints);        jLabel2.setText("\u804c\u4f4d\uff1a");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.SOUTHEAST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 10, 0);
        add(jLabel2, gridBagConstraints);        jTextField2.setColumns(15);
        jTextField2.addFocusListener(new java.awt.event.FocusAdapter() {
            public void focusLost(java.awt.event.FocusEvent evt) {
                TextFieldFocusLost(evt);
            }
        });        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.SOUTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 10, 0);
        add(jTextField2, gridBagConstraints);        jLabel3.setText("\u7f51\u7ad9\uff1a");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 2;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.SOUTHEAST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 10, 0);
        add(jLabel3, gridBagConstraints);        jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "\u667a\u8054\u62db\u8058", "ChinaHR.com", "51job.com" }));
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 2;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.SOUTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 10, 0);
        add(jComboBox1, gridBagConstraints);        jLabel4.setText("E-mail\uff1a");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 3;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.SOUTHEAST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 10, 0);
        add(jLabel4, gridBagConstraints);        jTextField4.setColumns(15);
        jTextField4.addFocusListener(new java.awt.event.FocusAdapter() {
            public void focusLost(java.awt.event.FocusEvent evt) {
                TextFieldFocusLost(evt);
            }
        });        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 3;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.SOUTHWEST;
        gridBagConstraints.insets = new java.awt.Insets(0, 0, 10, 0);
        add(jTextField4, gridBagConstraints);        buttonPanel.setLayout(new java.awt.GridBagLayout());        okButton.setText("\u6dfb\u52a0");
        buttonPanel.add(okButton, new java.awt.GridBagConstraints());        cancelButton.setText("\u53d6\u6d88");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.insets = new java.awt.Insets(0, 20, 0, 0);
        buttonPanel.add(cancelButton, gridBagConstraints);        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 4;
        gridBagConstraints.insets = new java.awt.Insets(15, 0, 0, 0);
        add(buttonPanel, gridBagConstraints);    }

Answer 2

private void TextFieldFocusLost(java.awt.event.FocusEvent evt) {                                    
        if(!evt.isTemporary()){
            if(!selectField(evt.getComponent()).isFocusOwner()){
                    selectField(evt.getComponent()).requestFocusInWindow();
                    System.out.println("我是焦点");
            }
            if(!checkField(selectField(evt.getComponent())));
        }
    }                                   
    
    private void errorTreatmentField(javax.swing.JTextField field){
        
        field.selectAll();
        field.requestFocusInWindow();
        javax.swing.JOptionPane.showMessageDialog(null, 
            message,
            "Invalid Value",
            javax.swing.JOptionPane.WARNING_MESSAGE);
    }
    
    private boolean checkField(javax.swing.JTextField field){
        return isValidMatch(field.getText(),regex);
    }
    
    private javax.swing.JTextField selectField(java.awt.Component component){
        if(component == jTextField1){
            message = "输入的公司名信息错误.\n输入的字符只能为 字母 汉字 空格 小括号 - \n请重新输入.";
            regex = "[-a-zA-Z() \u4E00-\u9FA5]{1,25}";
            return jTextField1;
        }else if(component == jTextField2){
            message = "输入的职位信息错误.\n输入的字符只能为 小括号 字母 数字 汉字 空格 : / - \n请重新输入.";
            regex = "[-:/() \\w\u4E00-\u9FA5]{1,30}";
            return jTextField2;
        }else {
            message = "输入的E-mail地址错误.\n输入的格式为[email protected] \n请重新输入.";
            regex = "\\w{1,20}@\\w{3,10}\\.\\w{2,8}";
            return jTextField4;
        }
    }
    
    private boolean isValidMatch(String input, String regex){
        Matcher matcher = Pattern.compile(regex).matcher(input);
        return matcher.matches();
    }

Answer 3

http://hi.baidu.com/1shome/blog/item/e07c3ff0c4a00bc27931aaa8.html
这里有例子思路不一样