比如我有下面这样一个List,里面存放的是多个Employee对象。然后我想对这个List进行按照Employee对象的名字进行模糊查询。有什么好的解决方案么?
比如我输入的查询条件为“wang”,那么应该返回只包含employee1的List列表。
java" id="highlighter_881818">
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List list = new ArrayList();
Employee employee1 = new Employee();
employee1.setName( "wangqiang" );
employee1.setAge( 30 );
list.add(employee1);
Employee employee2 = new Employee();
employee2.setName( "lisi" );
list.add(employee2);
employee2.setAge( 25 );
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方式一:
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public List search(String name,List list){
List results = new ArrayList();
Pattern pattern = Pattern.compile(name);
for ( int i= 0 ; i < list.size(); i++){
Matcher matcher = pattern.matcher(((Employee)list.get(i)).getName());
if (matcher.matches()){
results.add(list.get(i));
}
}
return results;
}
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上面那个是大小写敏感的,如果要求大小写不敏感,改成:
Pattern pattern = Pattern.compile(name,Pattern.CASE_INSENSITIVE);
并且上面那个是精确查询,如果要模糊匹配,matcher.find()即可以进行模糊匹配
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public List search(String name,List list){
List results = new ArrayList();
Pattern pattern = Pattern.compile(name);
for ( int i= 0 ; i < list.size(); i++){
Matcher matcher = pattern.matcher(((Employee)list.get(i)).getName());
if (matcher.find()){
results.add(list.get(i));
}
}
return results;
}
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方式二:
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public class ListLike {
//定义员工类
public class Employee {
private String name;
private int age;
public int getAge() {
return age;
}
public void setAge( int age) {
this .age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this .name = name;
}
}
public List list= new ArrayList();
//增加员工
public List addList(String name, int age){
Employee employee1 = new Employee();
employee1.setName(name);
employee1.setAge(age);
list.add(employee1);
return list;
}
//显示所有员工
public void ShowList(){
for ( int i= 0 ;i<list.size();i++){
System.out.println(((Employee)(list.get(i))).getName()+ " " +((Employee)(list.get(i))).getAge());
}
}
//模糊查询
public List likeString(String likename){
for ( int i= 0 ;i<list.size();i++){
if (((Employee)(list.get(i))).getName().indexOf(likename)<=- 1 )
list.remove(i);
}
return list;
}
public static void main(String arg[]){
ListLike ll= new ListLike();
ll.addList( "wuxiao" , 13 );
ll.addList( "wangwang" , 11 );
ll.addList( "wanghua" , 12 );
ll.addList( "xiaowang" , 13 );
ll.addList( "xiaoxiao" , 13 );
ll.likeString( "wang" );
ll.ShowList();
}
}
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以上就是小编为大家带来的在java List中进行模糊查询的实现方法全部内容了,希望大家多多支持服务器之家~