每次都要转字符太麻烦了，写了个小工具。

下载地址：CharToString_fat.jar 

源代码：

import java.awt.Toolkit;
public class Test extends javax.swing.JFrame {
	private static final long serialVersionUID = 1L;
	public Test() {
        initComponents();
    }
    private void initComponents() {
    	int screenWidth = Toolkit.getDefaultToolkit().getScreenSize().width;
    	int screenHeight = Toolkit.getDefaultToolkit().getScreenSize().height;
    	this.setBounds(screenWidth / 2 - 367, screenHeight / 2 - 235, 734, 469);
    	this.setTitle("Char to String");
        jLabel1 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton();
        jComboBox1 = new javax.swing.JComboBox();
        jScrollPane1 = new javax.swing.JScrollPane();
        jTextArea1 = new javax.swing.JTextArea();
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        jLabel1.setText("Input:");
        jButton1.setText("转换");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });
        jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "toChar", "toString" }));
        jTextArea1.setText("格式\ntoChar:abcd\ntoString:97.98,99");
        jTextArea1.setColumns(20);
        jTextArea1.setRows(5);
        jScrollPane1.setViewportView(jTextArea1);
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(2, 2, 2)
                .addComponent(jLabel1)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 488, Short.MAX_VALUE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jButton1)
                .addContainerGap())
            .addComponent(jScrollPane1)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(13, 13, 13)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel1)
                    .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jButton1)
                    .addComponent(jComboBox1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 420, Short.MAX_VALUE))
        );
        pack();
    }
    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
    	String str = jTextField1.getText();
    	jTextArea1.setText("");
    	String sb = "";
    	if("toChar".equals(jComboBox1.getSelectedItem())){
    		for(char c:str.toCharArray()){
    			sb+="char("+(int)c+"),";
    		}
    		jTextArea1.setText(sb.endsWith(",")?sb.substring(0,sb.length()-1):sb);
    	}else{
    		String[] s = jTextField1.getText().split(",");
    		for(String b:s){
    			sb+=(char)Integer.parseInt(b);
    		}
    		jTextArea1.setText(sb);
    	}
    }                                        
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Test().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JComboBox jComboBox1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea jTextArea1;
    private javax.swing.JTextField jTextField1;
    // End of variables declaration                   
}