我正在尝试动态创建 jlabels 和 jtextfields,然后添加到 jPanel 中,用户可以在其中将数据插入到数据库中的表中。
我从数据库中检索所有表属性的名称,然后我必须为每个名称创建一个 jlabel 和一个 jtext。它的结果应该如下所示(只有在 jpanel 底部没有更多空间时才应该创建标签 5):
我尝试使用 GroupLayout 和 SequentialGroup 但我无法实现类似的效果。我完成了一些我无法理解和解决的完全尴尬的事情。
名为“ESTADO”的标签应位于“SIGLA”标签下方,带有“inserting table is:”文本的标签应位于屏幕左侧,如第一张图片所示。
我的代码是:
ArrayList<String[]> tableAtts = sql.getTableAttributeNames(table);
javax.swing.GroupLayout jPDataInsertionLayout = new javax.swing.GroupLayout(jPDataInsertion);
jPDataInsertion.setLayout(jPDataInsertionLayout);
GroupLayout.SequentialGroup shgp = jPDataInsertionLayout.createSequentialGroup();
GroupLayout.SequentialGroup svgp = jPDataInsertionLayout.createSequentialGroup();
jPDataInsertionLayout.setHorizontalGroup(
jPDataInsertionLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.CENTER)
.addGroup(shgp));
jPDataInsertionLayout.setVerticalGroup(
jPDataInsertionLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.CENTER)
.addGroup(svgp));
//shgp.addContainerGap();
svgp.addContainerGap().addComponent(jLInsertingTable);
for (String[] values : tableAtts) {
JLabel jLTableAtt = new JLabel(values[0]);
JTextField jTFTableAtt = new JTextField();
jTFTableAtt.setColumns(13);
shgp.addComponent(true,jLTableAtt)
.addGap(18, 18, 18)
.addComponent(jTFTableAtt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE);
svgp.addGap(18, 18, 18)
.addGroup(jPDataInsertionLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLTableAtt, javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jTFTableAtt,javax.swing.GroupLayout.Alignment.BASELINE ,javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE));
}
shgp.addComponent(jLInsertingTable);
编辑:
使用#rcook 所说的,我更改了组并设法创建了我想要的。这是我设法创建的代码:
ArrayList<String[]> tableAtts = sql.getTableAttributeNames(table);
ArrayList<JLabel> attLabels = new ArrayList<>();
ArrayList<JTextField> attFields = new ArrayList<>();
javax.swing.GroupLayout jPDataInsertionLayout = new javax.swing.GroupLayout(jPDataInsertion);
jPDataInsertion.setLayout(jPDataInsertionLayout);
GroupLayout.SequentialGroup hsg = jPDataInsertionLayout.createSequentialGroup();
ArrayList<String[]> tempTableAtt = new ArrayList<>(tableAtts);
for(int i = 0; (!tempTableAtt.isEmpty()) && i < COLUMN_SIZE ; i++){
GroupLayout.ParallelGroup innerhpg = jPDataInsertionLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false);
for(int j = 0; (!tempTableAtt.isEmpty()) && j < ROW_SIZE ; j++){
String[] att = tempTableAtt.get(0);
GroupLayout.SequentialGroup innerhsg = jPDataInsertionLayout.createSequentialGroup();
JLabel jLTableAtt = new JLabel(att[0]);
JTextField jTFTableAtt = new JTextField();
jTFTableAtt.setColumns(13);
attLabels.add(jLTableAtt);
attFields.add(jTFTableAtt);
innerhsg.addComponent(jLTableAtt)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jTFTableAtt);
innerhpg.addGroup(javax.swing.GroupLayout.Alignment.LEADING, innerhsg);
tempTableAtt.remove(att);
}
hsg.addGap(18,18,18).addGroup(innerhpg);
}
jPDataInsertionLayout.setHorizontalGroup(
jPDataInsertionLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPDataInsertionLayout.createSequentialGroup()
.addContainerGap()
.addGroup(jPDataInsertionLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLInsertingTable)
.addGroup(hsg))));
GroupLayout.SequentialGroup vsg = jPDataInsertionLayout.createSequentialGroup();
vsg.addContainerGap()
.addComponent(jLInsertingTable);
for(int i = 0; i < tableAtts.size() && i < ROW_SIZE; i++){
GroupLayout.ParallelGroup vpg = jPDataInsertionLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE);
vpg.addComponent(attLabels.get(i))
.addComponent(attFields.get(i), javax.swing.GroupLayout.PREFERRED_SIZE,javax.swing.GroupLayout.DEFAULT_SIZE,javax.swing.GroupLayout.PREFERRED_SIZE);
for(int j = 0; (tableAtts.size() > ROW_SIZE) && ((i+(ROW_SIZE*(j+1))) < tableAtts.size()) && j < COLUMN_SIZE; j++){
vpg.addComponent(attLabels.get(i+(ROW_SIZE*(j+1))))
.addComponent(attFields.get(i+(ROW_SIZE*(j+1))), javax.swing.GroupLayout.PREFERRED_SIZE,javax.swing.GroupLayout.DEFAULT_SIZE,javax.swing.GroupLayout.PREFERRED_SIZE);
}
vsg.addGap(18, 18, 18).addGroup(vpg);
}
jPDataInsertionLayout.setVerticalGroup(
jPDataInsertionLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(vsg));
我不知道这是否是最好的解决方案,但它有效。