private void jbLeanPageActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jbLeanPageActionPerformed
        String pc = jtaPageContent.getText();
        pc = pc.replace("\r", "").replace("\n\n", "\n").replace("　", "").replace("\n ", "\n");
        jtaPageContent.setText(pc);
        jtaPageContent.setCaretPosition(0); // 跳到头部
    }