java中英文混合排序_java对象属性排序，支持中英文字符串和数字
import java.lang.reflect.Method;
import java.text.Collator;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
/**
* @author 邬小洪 QQ:16044171
* @version 1.0,2010-7-24
*/
public class MyComparator implements Comparator {
private Comparator cmp = Collator.getInstance(java.util.Locale.CHINA);
private String[] sortBy;
private int order;
private MyComparator(String[] sortBy, int order) {
this.sortBy = sortBy;
this.order = order;
}
/*
* 定义排序规则 若是按照不止一个属性进行排序 这按照属性的顺序进行排序,相似sql order by 即只要比较出同位置的属性就中止
*/
public int compare(Object o1, Object o2) {
for (int i = 0; i < sortBy.length; i++) {
Object value1 = getFieldValueByName(sortBy[i], o1);
Object value2 = getFieldValueByName(sortBy[i], o2);
if (value1 instanceof Integer && value2 instanceof Integer) {
int v1 = Integer.parseInt(value1.toString());
int v2 = Integer.parseInt(value2.toString());
if (v1 > v2) {
return 1 * this.order;
} else if (v1 < v2) {
return -1 * this.order;
}
} else {
int result = cmp.compare(value1, value2);
if (result != 0) {
return result * this.order;
}
}
}
return -1 * this.order;
}
/**
*
* 经过反射，获取属性值
*
* @param fieldName
* @param o
* @return
*/
private Object getFieldValueByName(String fieldName, Object o) {
try {
String firstLetter = fieldName.substring(0, 1).toUpperCase();
String getter = "get" + firstLetter + fieldName.substring(1);
Method method = o.getClass().getMethod(getter, new Class[] {});
Object value = method.invoke(o, new Object[] {});
return value;
} catch (Exception e) {
System.out.println("属性不存在");
return null;
}
}
/**
*
* 待排序对象
*
* @author 邬小洪 QQ:16044171
* @version 1.0,2010-7-24
*/
private static class Bean {
private String name = null;
private String post = null;
private Integer age = null;
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getPost() {
return post;
}
public void setPost(String post) {
this.post = post;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
public static void main(String[] args) {
Bean b1 = new Bean();
b1.setName("邬小洪");
b1.setPost("研发工程师");
b1.setAge(26);
Bean b2 = new Bean();
b2.setName("小洪");
b2.setPost("部署工程师");
b2.setAge(27);
Bean b3 = new Bean();
b3.setName("洪儿");
b3.setPost("部署工程师");
b3.setAge(28);
Bean b4 = new Bean();
b4.setName("邬小洪");
b4.setPost("架构工程师");
b4.setAge(27);
List list = new ArrayList();
list.add(b1);
list.add(b2);
list.add(b3);
list.add(b4);
String[] sortBy = new String[] { "name", "post" };
int orderBy = 1;//1:升序，-1：降序
MyComparator myCmp = new MyComparator(sortBy, orderBy);
Collections.sort(list, myCmp);
System.out.println("--------------------按名字和职位升序----------------------------");
for (Bean b : list) {
System.out.println("name:" + b.getName() + ",post:" + b.getPost()
+ ",age:" + b.getAge());
}
sortBy = new String[] { "post", "age" };
myCmp = new MyComparator(sortBy, orderBy);
Collections.sort(list, myCmp);
System.out.println("--------------------按职位和年龄升序----------------------------");
for (Bean b : list) {
System.out.println("post:" + b.getPost() + ",age:" + b.getAge()
+ ",name:" + b.getName());
}
sortBy = new String[] { "age", "name" };
myCmp = new MyComparator(sortBy, orderBy);
Collections.sort(list, myCmp);
System.out.println("--------------------按年龄和名字升序----------------------------");
for (Bean b : list) {
System.out.println("age:" + b.getAge() + ",name:" + b.getName()
+ ",post:" + b.getPost());
}
}
}sql