[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; un/eS-IIh
} ;{ezK8FJ}@
int i1=l; ' 5Ieqpm9
int i2=mid+1; WkO .
for(int cur=l;cur<=r;cur++){ u(o@_6
if(i1==mid+1) DBv5Og
data[cur]=temp[i2++]; j=gbUXv/
else if(i2>r) `C()H@;
data[cur]=temp[i1++]; y>#j4%D~4
else if(temp[i1] data[cur]=temp[i1++]; *PI3L/*
else dKMuo'H'%
data[cur]=temp[i2++]; Kr#=u~~M
} TcIUo!:z
} ydFY<Mb(o
4-"wFp
} ]6aM %r=c
kQb0pfYs
改进后的归并排序: Oh^X^*I$@
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package org.rut.util.algorithm.support; zZRqb/20
6RF01z|~_
import org.rut.util.algorithm.SortUtil; Z5U~g?
q+DH2&E'
/** 'l}3Iua6qk
* @author treeroot FFkG,XH
* @since 2006-2-2 >}I}9y+
* @version 1.0 ;e{2?}#8&
*/ U!'lc}5
public class ImprovedMergeSort implements SortUtil.Sort { >hhd9
<V,?!}V
private static final int THRESHOLD = 10; \xdt|:8
Cjh&$aq
/* :@/fy}!
* (non-Javadoc) V.4j?\#%
* XXF9oy8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pta%%8":
*/ ]`NbNr]K
public void sort(int[] data) { 06`__$@h
int[] temp=new int[data.length]; 5A)w.i&V
mergeSort(data,temp,0,data.length-1); ZBXGuf
} i`Yf|^;@2>
!69^kIi$
private void mergeSort(int[] data, int[] temp, int l, int r) { e%P;Jj476
int i, j, k; 7^; OjO@8
int mid = (l + r) / 2; WNx^Rg" >'
if (l == r) UVLcR
return; R*y[/Aw
if ((mid - l) >= THRESHOLD) R',w~1RV'
mergeSort(data, temp, l, mid); epL[PL}
else 98]t"ny [
insertSort(data, l, mid - l + 1); C0W~Tk\C2
if ((r - mid) > THRESHOLD) W wE)XE
mergeSort(data, temp, mid + 1, r); 9JtvHUkO
else Q.XsY.{
insertSort(data, mid + 1, r - mid); VB#31T#q?
<It7s1O
for (i = l; i <= mid; i++) { IX(yajc[~M
temp = data; Rf^cw}jU
} b>z.d-
for (j = 1; j <= r - mid; j++) { z]YhQIU4n8
temp[r - j + 1] = data[j + mid]; C{Ug ?hVP
} L1xD$wl
int a = temp[l]; c 2@@Rd~M
int b = temp[r]; qWpCe*C
for (i = l, j = r, k = l; k <= r; k++) { ]*@$%iCPE
if (a < b) { Ak1)
data[k] = temp[i++]; PPPwDsJ
a = temp; aX%Zuyny
} else { {t:ND
data[k] = temp[j--]; %MJ7u}
b = temp[j]; E,fp=.
} (3h*sd5ly
} DxgT]F%
} 5Nb_K`Vp*
N]}+F w\5
/** cv4M[]U~
* @param data c.Y8CD.tqL
* @param l ws?s
* @param i ;QQ7vo
*/ .^S78hr]n
private void insertSort(int[] data, int start, int len) { -C}59G8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _0["J:s9
} $tHwJ!<$&
} J_|}Xd)~t6
} dO;vcgvb
} {l&2Kd*
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堆排序： ]~Vu-@ /}
KdJx#Lc
package org.rut.util.algorithm.support; TQd FC\@f"
u2BW]T]
import org.rut.util.algorithm.SortUtil; nj0AO0
zZc@;S#
/** 9*+0j2uhQ
* @author treeroot YIQ]]q8R!L
* @since 2006-2-2 B;]5,`#!
* @version 1.0 ]MLLr'6?
*/ d"6]?
public class HeapSort implements SortUtil.Sort{ {kl{mJ*
nYy}''l<
/* (non-Javadoc) ;3}EBcw)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u?3NBc$~A
*/ 62l0 Z-
public void sort(int[] data) { kqvJ&7
MaxHeap h=new MaxHeap(); lhA s!\F
h.init(data); BH0#Q5
for(int i=0;i h.remove(); B/D\gjb
System.arraycopy(h.queue,1,data,0,data.length); Qy^z*s
} Y-3[KHD
sp Q4m
private static class MaxHeap{ :n4:@L<%H
+#uNQ`1v
void init(int[] data){ )=E~CpKV
this.queue=new int[data.length+1]; Dyk[ug5
for(int i=0;i queue[++size]=data; q$?7 ~*M;x
fixUp(size); y{`(|,[
} RQpIBsj
} TG63
Q_kT}6#(J=
private int size=0; %-ZR~*
(}FW])y
private int[] queue; %g0z)J
qHR^0&
public int get() { du'}+rC
return queue[1]; %O&m#)|
} C^,4`OI
xQ#Akd=
public void remove() { P~\a)Szy
SortUtil.swap(queue,1,size--); +% XhQ
fixDown(1); /NW>;J}C
} -eR!qy:.]5
file://fixdown Gf H*,1x
private void fixDown(int k) { rwL=R,
int j; 5%QC ][,
while ((j = k << 1) <= size) { 8|5Gv
if (j < size %26amp;%26amp; queue[j] j++; m@G<ZCMZ
if (queue[k]>queue[j]) file://不用交换 ']ITuP8
break; P /c Q1
SortUtil.swap(queue,j,k); `J>E9p<
k = j; N)y^</Ya
} rL%]S&M9
} DJViy
private void fixUp(int k) { qe5tcv}u
while (k > 1) { $u; >hk
int j = k >> 1; K0O-WJ
if (queue[j]>queue[k]) ;wJ7oj<
break; 5\akI\
SortUtil.swap(queue,j,k); {PODisl>\D
k = j; 1V|< A
} q+A<g(Xu
} L_THU4^j
aF&r/j+}o
} :DtZ8$I`]C
^&+zA,aL,A
} cWN d<=Jp
eJU;*] xfH
SortUtil： ;cv.f>Cm
'1W!xQ}E
package org.rut.util.algorithm; @-'/__cgt
1MbY7!?PG
import org.rut.util.algorithm.support.BubbleSort; k{gl^
import org.rut.util.algorithm.support.HeapSort; 1YOg1 n+k
import org.rut.util.algorithm.support.ImprovedMergeSort; CfPXn0I
import org.rut.util.algorithm.support.ImprovedQuickSort; w^06z,
import org.rut.util.algorithm.support.InsertSort; .S~@BI(|<
import org.rut.util.algorithm.support.MergeSort; A",eS6
import org.rut.util.algorithm.support.QuickSort; PD6MyW05%9
import org.rut.util.algorithm.support.SelectionSort; O&`U5w
import org.rut.util.algorithm.support.ShellSort; R%>jJ[4\[
9#v-2QY
/** .)LZ`Ge3F
* @author treeroot 9@:BK;Fi
* @since 2006-2-2 8)L'rW{q#
* @version 1.0 @SU8\:(U
*/ F(#haJ$>
public class SortUtil { M{C6rm|
public final static int INSERT = 1; fuq( 2&^
public final static int BUBBLE = 2; R<"2%oY
public final static int SELECTION = 3; :]vA2
public final static int SHELL = 4; /_]ltXD
public final static int QUICK = 5; 3(1]FKZtt
public final static int IMPROVED_QUICK = 6; {DU"]c/S
public final static int MERGE = 7; d; 9*l!CF
public final static int IMPROVED_MERGE = 8; _b>F#nD,'%
public final static int HEAP = 9; lc]V\'e
2zz,(RA
public static void sort(int[] data) { k/%#>
sort(data, IMPROVED_QUICK); kW#S]fsfU
} r]v&t
private static String[] name={ ?N:B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G 0hYFc u
}; b3}Q#Y\G
|~z3U>
private static Sort[] impl=new Sort[]{ BWWq4mdb{
new InsertSort(), ]fj-`==
new BubbleSort(), f0vJm
new SelectionSort(), aYqm0HCT
new ShellSort(), AIb>pL{
new QuickSort(), uS~#4;R
new ImprovedQuickSort(), |pJC:woq
new MergeSort(), ?]^zD k@~
new ImprovedMergeSort(), :Zza)>l
new HeapSort() u#1%P5r&X
}; W;4Lkk$
;+sl7qlA4
public static String toString(int algorithm){ /#f^n]v
return name[algorithm-1]; w!\3ICB
} {(4# )K2g%
yMb|I~k
public static void sort(int[] data, int algorithm) { %<ic%gt`#
impl[algorithm-1].sort(data); joqWh!kv7U
} /be=u@KV
^-hErsK
public static interface Sort { Y&K <{\vE
public void sort(int[] data); +c--&tBo
} Pe}PH I
~O{W;Cyh
public static void swap(int[] data, int i, int j) { e # 5BPI
int temp = data; GX }q9
data = data[j]; `N}d}O8
data[j] = temp; y%S})9
} [[WF0q
} Zsj`F9*e