[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; -h8!O+7 .
} ~U~4QQV
int i1=l; +6{KrREX)
int i2=mid+1; 'm=9&?0S
for(int cur=l;cur<=r;cur++){ ^ffh
if(i1==mid+1) FBPT@`~v
data[cur]=temp[i2++]; -3r&O:
else if(i2>r) F#^.L|d4
data[cur]=temp[i1++]; {hM*h(W~3
else if(temp[i1] data[cur]=temp[i1++]; dR_hPBn/@
else BI=Ie?
data[cur]=temp[i2++]; gGU3e(!Uc
} V@K}'f~
} ;r[=q u\
P"u*bqk
} 1W HR;!u
|[|X
改进后的归并排序: b,G+=&6u
s/Wg^(&M
package org.rut.util.algorithm.support; k>n^QHM
4!6g[[|&J
import org.rut.util.algorithm.SortUtil; v(4C?vxhG
^c\IZ5
/** }R1`ThTM
* @author treeroot Y/S3)o
* @since 2006-2-2 *!'&:
* @version 1.0 @g75T`N
*/ 4Z}bw#
public class ImprovedMergeSort implements SortUtil.Sort { S(J\<)b
Su"_1~/2S
private static final int THRESHOLD = 10; (oXN>^-D
|"yf@^kdC
/* *|HZ&}
* (non-Javadoc) #eC;3Kq#-
* 5(|M["KK~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aEDN]O95?
*/ }Hz-h4Z
public void sort(int[] data) { #Q3PzDfj
int[] temp=new int[data.length]; `XxG"k\/S
mergeSort(data,temp,0,data.length-1); *yaX:,'\$
} ,Us2UEWNv
(b%y$D
private void mergeSort(int[] data, int[] temp, int l, int r) { EB>B,#
int i, j, k; z@~&Kwf\}
int mid = (l + r) / 2; ~B!O~nvdQ
if (l == r) F:J7|<J^F
return; kz0=GKic
if ((mid - l) >= THRESHOLD) P=^#%7J/l
mergeSort(data, temp, l, mid); n`)7Y`hBhP
else `OP>(bU0
insertSort(data, l, mid - l + 1); ]&:b<]K3
if ((r - mid) > THRESHOLD) -2&i)S0R
mergeSort(data, temp, mid + 1, r); 4C1FPrh
else ,k~j6Z
insertSort(data, mid + 1, r - mid); Hl3)R*&'J
R|1xXDLm*E
for (i = l; i <= mid; i++) { `x} Dk<HF
temp = data; k\pDJ7wF^
} uyNJN
for (j = 1; j <= r - mid; j++) { 'qV3O+@MF
temp[r - j + 1] = data[j + mid]; :Sc8PLT
} voV:H[RD9
int a = temp[l]; ,?k%jcR
int b = temp[r]; xHB/]Vd-
for (i = l, j = r, k = l; k <= r; k++) { +~d1;0l|
if (a < b) { P>Q{He:
data[k] = temp[i++]; /zG+]
a = temp; )4ilCS&
} else { 's[BK/
data[k] = temp[j--]; #SQvXMT
b = temp[j]; SFn 3$ rh
} @Y UY9+D&
} 4;C*Fa
} PW%1xHLfk
ivzAlwP
/** +2DE/wE]e+
* @param data qO-C%p [5
* @param l mz\NFC<
* @param i fxDj+Q1p
*/ S Pn8\2Cj
private void insertSort(int[] data, int start, int len) { \+k, :8s/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oYz!O]j;a
} ;1W6"3t-Y
} 5"JU?e59M
} ja[OcR-tX
} yo'9x s
lC#RNjDp/~
堆排序： (0i'Nb"
XFW5AP
package org.rut.util.algorithm.support; o+<29o
I%@e@Dm,h
import org.rut.util.algorithm.SortUtil; /1UOT\8U
H6*^Ga
/** f|7\DeY9U
* @author treeroot Vv.r8IGYm
* @since 2006-2-2 "ww|&-W9
* @version 1.0 {P%9
*/ #p(h]T32
public class HeapSort implements SortUtil.Sort{ 4S"\~><
S^@S%Eg
/* (non-Javadoc) +d}E&=p_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >eQr<-8
*/ Ks^6.)
public void sort(int[] data) { OVzt\V*+%W
MaxHeap h=new MaxHeap(); "xI"
h.init(data); }U~6^2 .,
for(int i=0;i h.remove(); H={DB
System.arraycopy(h.queue,1,data,0,data.length); bK"SKV
} z<sg0K8z63
J?@DGp+t
private static class MaxHeap{ K;?,FlH
l:0s2
void init(int[] data){ kE>0M9EdH
this.queue=new int[data.length+1]; o+`6LKg;
for(int i=0;i queue[++size]=data; :P,sxDlG)
fixUp(size); E1dD7r\
} nkxzk$
} Q?ahr~qo
kIw`P[
private int size=0; 1_fZm+oW!
rk+#GO{
private int[] queue; D0k 8^
T{V/+RM
public int get() { 0iULCK
return queue[1]; |b-9b&
} 2"|2a@
3czeTj
public void remove() { 7^wc)E^H
SortUtil.swap(queue,1,size--); \k;`}3uO
fixDown(1); Fc~'TBf,,`
} ZX ?yL>4
file://fixdown .Ha'p.
private void fixDown(int k) { M02uO`Y9
int j; TPhTaKCio
while ((j = k << 1) <= size) { kM`l
if (j < size %26amp;%26amp; queue[j] j++; _Jv 9F8v
if (queue[k]>queue[j]) file://不用交换 e?bYjJq
break; m?HZ;
SortUtil.swap(queue,j,k); tRpEF2
k = j; jPnM>=
} PA w-6;
} 4 g. bR
private void fixUp(int k) { !EQ@#qW/
while (k > 1) { ?X?&~3iD%
int j = k >> 1; {G*A.$-d
if (queue[j]>queue[k]) r}yG0c,
break; 'rh\CA/}D
SortUtil.swap(queue,j,k); a^x 0 l
k = j; 5 Af?Yxv
} 4zwif&
} ^Wk0*.wg
gvK"*aIj
} Ul9b.`6
$ JuLAqq
} [@zkv)D6
h4hd<,
SortUtil： 6XZN>#
+ p'\(Z(
package org.rut.util.algorithm; )biX8yqhR
r@;$V_I
import org.rut.util.algorithm.support.BubbleSort; 75PS^5T,
import org.rut.util.algorithm.support.HeapSort; 9/^d~ZO
import org.rut.util.algorithm.support.ImprovedMergeSort; }el,^~
import org.rut.util.algorithm.support.ImprovedQuickSort; Wl?<c uw00
import org.rut.util.algorithm.support.InsertSort; EyzY2>"^
import org.rut.util.algorithm.support.MergeSort; 3!1&DII4
import org.rut.util.algorithm.support.QuickSort; miWw6!()
import org.rut.util.algorithm.support.SelectionSort; mJ/^BT]
import org.rut.util.algorithm.support.ShellSort; -\5[Nq{N
8 `yB
/** eNHpgj
* @author treeroot tYF$#Nor#k
* @since 2006-2-2 I<IC-k"Y
* @version 1.0 `AB~YX%(
*/ 3@%BA(M
public class SortUtil { rE9Ta8j6
public final static int INSERT = 1; L)@`58Eil
public final static int BUBBLE = 2; 0oXK&Z
public final static int SELECTION = 3; 3KB|NS
public final static int SHELL = 4; Bi %Z2/
public final static int QUICK = 5; -wJ
public final static int IMPROVED_QUICK = 6; r{bgTG
public final static int MERGE = 7; Xq[:GUnt
public final static int IMPROVED_MERGE = 8; <aD'$(N5
public final static int HEAP = 9; wV7@D[8
<.y;&a o
public static void sort(int[] data) { 721{Ga4~S
sort(data, IMPROVED_QUICK); F0X5dv
} &h98.A*&
private static String[] name={ 8') .ohD
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" R?1idl)
}; JI28O8
ly9x1`?$
private static Sort[] impl=new Sort[]{ \65vfE~ O
new InsertSort(), qiF@7i
new BubbleSort(), &\CJg'D:m
new SelectionSort(), $w 5#2Za
new ShellSort(), liBAJx
new QuickSort(), yaCd4KP
new ImprovedQuickSort(), -6.i\ B
new MergeSort(), .aVHd<M
new ImprovedMergeSort(), F5:2TEA
new HeapSort() U}mL,kj"
}; O6*'gnke
My'9S2Y8nv
public static String toString(int algorithm){ cij]&$;Q
return name[algorithm-1]; iX0]g45o
} ~*,Ddwr0a
hnLgsz
public static void sort(int[] data, int algorithm) { .B-,GD}
impl[algorithm-1].sort(data); #UnO~IE.m$
} .xQ'^P_q
Jy[8,X
public static interface Sort { sEi.f(WA
public void sort(int[] data); [#fqyg
} b6M)qt9R
6#63D>OWp
public static void swap(int[] data, int i, int j) { T{xo_u{Q
int temp = data; jsht2]iq3K
data = data[j]; !/9Sb1_~
data[j] = temp; |Dpfh
} Q"_T040B
} dllf~:b