[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; RzA2*]%a
} M}Nb|V09
int i1=l; V$/u
int i2=mid+1; ,vPe}OKj
for(int cur=l;cur<=r;cur++){ _tWJXv~;
if(i1==mid+1) nu&_gF,{
data[cur]=temp[i2++]; lLuID
else if(i2>r) tcBC!_vF
data[cur]=temp[i1++]; vk @%R
else if(temp[i1] data[cur]=temp[i1++]; UL86-R!
else ]\CU9J|H8
data[cur]=temp[i2++]; #yW.o'S+
} xGYSi5}z
} JDLTOLG
!p}`kG
} uYFMv=>j
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改进后的归并排序: "r u]?{v
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package org.rut.util.algorithm.support; \[:PykS
c\At0.QCA
import org.rut.util.algorithm.SortUtil; 94\t1fE
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/** g %f*ofb
* @author treeroot h@=7R
* @since 2006-2-2 {@?G 9UypA
* @version 1.0 2@vJ
*/ !)N|J$FU
public class ImprovedMergeSort implements SortUtil.Sort { Jlp<koy
MhNFW'_
private static final int THRESHOLD = 10; F8H'^3`b`U
+ :Vrip
/* zbNA\.y
* (non-Javadoc) Z1M>-[j)
* 'l~6ErBSg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X 7=fX~s
*/ :p' VbQZ{
public void sort(int[] data) { $(ewk):
int[] temp=new int[data.length]; wJgX/W
mergeSort(data,temp,0,data.length-1); -D^L}b
} f;gZ|a
VU|;:
private void mergeSort(int[] data, int[] temp, int l, int r) { qos`!=g?
int i, j, k; ,vV]"f
int mid = (l + r) / 2; .-0%6] cFD
if (l == r) c"7j3/p
return; K$H <}e3
if ((mid - l) >= THRESHOLD) \ p4*$
mergeSort(data, temp, l, mid); 6-B 9na
else ;#TaZN
insertSort(data, l, mid - l + 1); AVG>_$<
if ((r - mid) > THRESHOLD) -I":Z2.fR
mergeSort(data, temp, mid + 1, r); ,m^;&&
else +R6a}d/K
insertSort(data, mid + 1, r - mid); Q6IQV0{p
HRB[GP+
for (i = l; i <= mid; i++) { H2;X
temp = data; fj>C@p
} F2 ~%zNe
for (j = 1; j <= r - mid; j++) { B@O@1?c[
temp[r - j + 1] = data[j + mid]; k6"KB
} /qU>5;
int a = temp[l]; Wkzs<y"
int b = temp[r]; ]XeO0Y
for (i = l, j = r, k = l; k <= r; k++) { ]3B%8
if (a < b) { {f/]5x(_
data[k] = temp[i++]; ~ttY(wCV
a = temp; 4 o(bxs"
} else { Q7gY3flg
data[k] = temp[j--]; 9!U@"~yB
b = temp[j]; -?6MU~"GK
} ~]'pY
} U7iuY~L
} I]nHbghcW
;n6b%,s
/** -x`G2i
* @param data M+`Hg_#Q
* @param l xd-XWXc
* @param i 9}29&O
*/ kforu!C
private void insertSort(int[] data, int start, int len) { @kFu*"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~D[?$`x:
} !k&Q 5s:
} @}s$]i$|-
} 6rN(_Oi-
} B[5r|d'
xJZ@DR,#
堆排序： gNpJ24QK
;WU<CKYG*
package org.rut.util.algorithm.support; >dzsQ^Nj
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import org.rut.util.algorithm.SortUtil; ?BA^YF
PX(pX>
/** 8|Y.|\
* @author treeroot 17.x0gW,
* @since 2006-2-2 zsXoBD\h
* @version 1.0 <spZ! #o
*/ w}R~C
public class HeapSort implements SortUtil.Sort{ ,`A?!.K$
" =] -%B
/* (non-Javadoc) QK`i%TXJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P u0uKE
*/ LjB;;&VCn
public void sort(int[] data) { h*B|fy4K9U
MaxHeap h=new MaxHeap(); !ZRs;UZ>o
h.init(data); o>/O++7Ra
for(int i=0;i h.remove(); c`*TPqw(B[
System.arraycopy(h.queue,1,data,0,data.length); ,)!u)wz
} (Y%Q|u
qT:zEt5
private static class MaxHeap{ \C^;k%{LV
ra N)8w}-
void init(int[] data){ qU6nJi+-I
this.queue=new int[data.length+1]; US [dkbKo
for(int i=0;i queue[++size]=data; Gfp1mev
fixUp(size); `qVjwJ!+
} @4$\ 5%j
} sOCs13A"
WY:&ugGx
private int size=0; llV3ka^!
Z?Hs@j
private int[] queue; G~7 i@Zs
J[~5U~F
public int get() { WKz> !E%
return queue[1]; 9`//^8G:=
} ^YdcAHjK
Sn4[3JV$l
public void remove() { )u]9193
SortUtil.swap(queue,1,size--); bI)u/
fixDown(1); r7]zQIE
} c#IYFTz
file://fixdown b1XRC`Gy
private void fixDown(int k) { >gwz,{
int j; 5}$b0<em~
while ((j = k << 1) <= size) { ;Vik5)D2D
if (j < size %26amp;%26amp; queue[j] j++; 4MuO1W-
if (queue[k]>queue[j]) file://不用交换 2QpHvsl_
break; E{^XlY
SortUtil.swap(queue,j,k); Rm1A>1a:
k = j; A\_|un%
} p[lNy{u~M
} $;M:TpX
private void fixUp(int k) { dz [!-M
while (k > 1) { r0d35
int j = k >> 1; ~_IHaw$hg
if (queue[j]>queue[k]) RB* J=
break; x_Jwd^`t!
SortUtil.swap(queue,j,k); R" )bDy?
k = j; uEyH2QO
} )*;zW!H
} 3p2P= T
yme^b ;a
} {!|}=45Z
DrnJ;Hi"
} "8^5>EJWv
u]u[(K5F
SortUtil： OouPj@r
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package org.rut.util.algorithm; ZCKka0*
bl_H4
import org.rut.util.algorithm.support.BubbleSort; y2]-&]&
import org.rut.util.algorithm.support.HeapSort; ydw)mT44K
import org.rut.util.algorithm.support.ImprovedMergeSort; Hqnxq
import org.rut.util.algorithm.support.ImprovedQuickSort; c|F[.;cR
import org.rut.util.algorithm.support.InsertSort; XNQAi (!GS
import org.rut.util.algorithm.support.MergeSort; ,QzL)W7
import org.rut.util.algorithm.support.QuickSort; O=SkAsim
import org.rut.util.algorithm.support.SelectionSort; ZxV"(\$n
import org.rut.util.algorithm.support.ShellSort; .s+aZwTMT
|#1(Z-}
/** E9?phD
* @author treeroot r]3'74j:
* @since 2006-2-2 JpsPNa
* @version 1.0 O+}qQNe<
*/ "S3wk=?4
public class SortUtil { V[-jD8='3
public final static int INSERT = 1; lEHzyh}2k
public final static int BUBBLE = 2; :l|%17N
public final static int SELECTION = 3; '47P|t
public final static int SHELL = 4; 2I*;A5$N1
public final static int QUICK = 5; OHiQ7#y
public final static int IMPROVED_QUICK = 6; w =.Fj
public final static int MERGE = 7; [mEql,x3
public final static int IMPROVED_MERGE = 8; U=hlu
public final static int HEAP = 9; Y"-^%@|p
k} ]T;|h]
public static void sort(int[] data) { 5~mh'<:
sort(data, IMPROVED_QUICK); Z2im@c67{
} "D?z
private static String[] name={ z]b>VpW:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T3`ludm^u
}; tmqY2.
1x,[6H
private static Sort[] impl=new Sort[]{ aK`@6F,]j
new InsertSort(), atXS-bg*
new BubbleSort(), Qs9gTBS;
new SelectionSort(), JaB<EL-9r2
new ShellSort(), Gmf B
new QuickSort(), [<'-yQ{l\
new ImprovedQuickSort(), 5@^ dgq
new MergeSort(), bdGIF'p%
new ImprovedMergeSort(), uV 7BK+[O
new HeapSort() GnP|x}YM
}; s21wxu:
7^w >Rj
public static String toString(int algorithm){ #j *d^j&
return name[algorithm-1]; PJ='tJDj
} 5/po2V9)
?nP*\8
public static void sort(int[] data, int algorithm) { ('-JY
impl[algorithm-1].sort(data); =gcM%=*'
} lFTF ,G
>yY'7Ey
public static interface Sort { gi0W;q
public void sort(int[] data); )T;?^kho
} +la2n(CAK
pv&y91
public static void swap(int[] data, int i, int j) { B<C*
int temp = data; rj6#1kt
data = data[j]; $H+VA@_
data[j] = temp; <{~6}6o
} ;j4?>3
} i;!H!-sM