今天主要是将如下界面做成JAVA版的，我做这个Winform的目的并不是说觉得winform有前途，而是在练手，为了后面web和Andriod开发打点基础。
那做好的java界面如下
OK，画好了，看代码，首先是绑定树的一个代码
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public
void
BuildCodeTree()
throws
SQLException {
treeCode.removeAll();
DefaultMutableTreeNode top =
new
DefaultMutableTreeNode(
new
NodeData(
"root"
,
"系统参数"
));
String sql =
"SELECT Distinct ename,cname FROM dbo.Codes WITH(NOLOCK)"
;
ResultSet res = JDBCSqlHelper.query(sql);
try
{
while
(res.next()) {
DefaultMutableTreeNode childTreeNode =
new
DefaultMutableTreeNode(
new
NodeData(res.getString(
"ename"
),
res.getString(
"cname"
)));
top.add(childTreeNode);
}
this
.treeCode =
new
JTree(top);
treeCode.setBounds(
10
,
39
,
146
,
278
);
treeCode.addTreeSelectionListener(
new
TreeSelectionListener() {
public
void
valueChanged(TreeSelectionEvent e) {
DefaultMutableTreeNode node = (DefaultMutableTreeNode) treeCode
.getLastSelectedPathComponent();
String nodeName = ((NodeData) node.getUserObject()).ename;
if
(nodeName ==
"root"
)
return
;
String sql =
"SELECT 0 as bit,data,ename,cname,display_content FROM dbo.Codes WHERE ename='"
+ nodeName +
"'"
;
ResultSet res = JDBCSqlHelper.query(sql);
List<String> columnList =
new
ArrayList<String>();
columnList.add(
"选择"
);
columnList.add(
"数据值"
);
columnList.add(
"英文代码"
);
columnList.add(
"中文代码"
);
columnList.add(
"显示值"
);
DataFillHelper.FillTable(res, table, columnList);
table.getColumnModel().getColumn(
0
)
.setCellRenderer(
new
TableCellRenderer() {
public
Component getTableCellRendererComponent(
JTable table, Object value,
boolean
isSelected,
boolean
hasFocus,
int
row,
int
column) {
JCheckBox ck =
new
JCheckBox();
ck.setSelected(isSelected);
ck.requestFocus(hasFocus);
ck.setHorizontalAlignment((
int
)
0
.5f);
return
ck;
}
});
table.getColumnModel().getColumn(
0
).setWidth(
10
);
}
});
treeCode.setBorder(
new
LineBorder(
new
Color(
0
,
0
,
0
)));
contentPane.add(treeCode);
// treeCode.setCellRenderer(new MyRenderer());
treeCode.setShowsRootHandles(
true
);
treeCode.setRootVisible(
true
);
}
catch
(SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
finally
{
res.close();
}
}
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这段代码首先会从数据库读出要加载的树的数据，由于这里的树只有两级，所以代码很简单。先定义一个root节点，然后将数库中的读出的节点加载在他下面。这样树就形成了，然后在树节点被选择时注册一个事件，事件中，如果选择的是root节点，则不加载右边的Jtable数据。否则根据英文代码加载左边的Jtable数据。
节点的数据使用NodeData这个类类记录的
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private
class
NodeData {
private
String ename;
public
String getEname() {
return
ename;
}
public
void
setEname(String ename) {
this
.ename = ename;
}
private
String cname;
public
String getCname() {
return
cname;
}
public
void
setCname(String cname) {
this
.cname = cname;
}
public
NodeData() {
}
public
NodeData(String ename, String cname) {
this
.setEname(ename);
this
.setCname(cname);
}
public
String toString() {
return
cname;
}
}
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左边的JTable数据的加载通过DataFillHelper类实现。
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public
class
DataFillHelper {
public
static
void
FillTable(ResultSet res, JTable jTable,List<String> columnList) {
Vector<String> columnHeads =
new
Vector<String>();
Vector<Vector> rows =
new
Vector<Vector>();
try
{
ResultSetMetaData rsmd = res.getMetaData();
for
(
int
i =
1
; i <= rsmd.getColumnCount(); i++) {
columnHeads.addElement(rsmd.getColumnName(i));
}
while
(res.next()) {
Vector<String> v =
new
Vector<String>();
for
(
int
i =
1
; i <= rsmd.getColumnCount(); i++) {
v.addElement(res.getString(i));
}
rows.add(v);
}
DefaultTableModel model =
new
DefaultTableModel(rows, columnHeads);
jTable.setModel(model);
makeFace(jTable);
for
(
int
i =
0
; i < jTable.getColumnModel().getColumnCount(); i++) {
jTable.getColumnModel().getColumn(i).setHeaderValue(
columnList.get(i));
}
}
catch
(SQLException e) {
// TODO 自动生成 catch 块
e.printStackTrace();
}
}
public
static
void
makeFace(JTable table) {
try
{
DefaultTableCellRenderer tcr =
new
DefaultTableCellRenderer() {
public
Component getTableCellRendererComponent(JTable table,
Object value,
boolean
isSelected,
boolean
hasFocus,
int
row,
int
column) {
if
(row %
2
==
0
)
setBackground(
new
Color(
206
,
231
,
255
));
else
if
(row %
2
==
1
)
setBackground(Color.white);
return
super
.getTableCellRendererComponent(table, value,
isSelected, hasFocus, row, column);
}
};
for
(
int
i =
0
; i < table.getColumnCount(); i++) {
table.getColumn(table.getColumnName(i)).setCellRenderer(tcr);
}
}
catch
(Exception ex) {
ex.printStackTrace();
}
}
}
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这里就不多做解释，解释我也解释不清楚。OK，在这里需要说明的是如果将jtable放在JScrollPane中，可能会导致jtable的列头不能显示，所以需要加入下面的代码
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table =
new
JTable();
table.setBorder(UIManager.getBorder(
"FormattedTextField.border"
));
table.setBackground(Color.WHITE);
JScrollPane scrollPane =
new
JScrollPane(table);
scrollPane.setBounds(
166
,
39
,
430
,
278
);
contentPane.add(scrollPane);
table.setFillsViewportHeight(
true
);
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就是那句SetFillsViewportHeight。OK,接下来我们看一下界面上的删除按钮功能。在前面我们已经在JTable中加入了checkBox。接下里我们看删除按钮的代码
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private
void
DeleteCodes() {
int
[] rowIndexs = table.getSelectedRows();
if
(rowIndexs.length==
0
){
MessageHelper.ShowMessage(
"请选择要删除的数据!"
);
return
;
}
StringBuffer strBuffer =
new
StringBuffer();
for
(
int
i : rowIndexs) {
Object data = table.getValueAt(i,
1
);
Object ename = table.getValueAt(i,
2
);
strBuffer.append(
"'"
);
strBuffer.append(data.toString() + ename.toString());
strBuffer.append(
"',"
);
}
strBuffer.setLength(strBuffer.length() -
1
);
String sql =
"DELETE FROM dbo.Codes WHERE (data+ename) IN ("
+ strBuffer.toString() +
")"
;
MessageHelper.ShowMessage(sql);
JDBCSqlHelper.update(sql);
}
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还有一个要说的是，我们并不想让后后面的列被编辑，我们只想第一列被编辑，所以需要覆盖IsCellEditable方法
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table =
new
JTable() {
public
boolean
isCellEditable(
int
row,
int
column) {
if
(column ==
0
) {
return
true
;
}
else
return
false
;
}
};
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OK，今天就讲到这里,洗洗睡!
本文转自 BruceAndLee 51CTO博客，原文链接：http://blog.51cto.com/leelei/1330835，如需转载请自行联系原作者
