[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; |`,2ri*5A
} |=ba9&q
int i1=l; ufZDF=$7
int i2=mid+1; 7P5)Z-K[
for(int cur=l;cur<=r;cur++){ Rz:]\jcIT/
if(i1==mid+1) gHEu/8E
data[cur]=temp[i2++]; Ugt/rf5n
else if(i2>r) gNrjo=
data[cur]=temp[i1++]; [{,T.;'<j
else if(temp[i1] data[cur]=temp[i1++]; wY%}
else \?ZB]*Fu
data[cur]=temp[i2++]; sA/D]W.P
} "]x'PI 4J
} Y%aCMP9j~9
PfD.:amN7
} ~i{(<.he
c(E{6g?
改进后的归并排序: v2\FA(BPn
)Y0!~# `
package org.rut.util.algorithm.support; (ejvF):|
&|ex`nwc0
import org.rut.util.algorithm.SortUtil; syj0.JD
l -mfFN
/** {n.PF8A5X
* @author treeroot El".I?E*
* @since 2006-2-2 7\[@m3s
* @version 1.0 M}-Rzc
*/ |?xN\O^#}
public class ImprovedMergeSort implements SortUtil.Sort { t%FwXaO#
G]tn i
private static final int THRESHOLD = 10; SrJGTuXg
beGa#JH,
/* Rz/gtEP
* (non-Javadoc) P[ck84F/
* P{jbl!UD7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {.|CdqwY
*/ I@~QV@U
public void sort(int[] data) { v`x.)S1
int[] temp=new int[data.length]; Tc:)- z[o
mergeSort(data,temp,0,data.length-1); FFpT~.
} }W8;=$jr
e4_rC'=
private void mergeSort(int[] data, int[] temp, int l, int r) { .},'~NM]
int i, j, k; yNo0ubY
int mid = (l + r) / 2; *W1dG#Np}
if (l == r) ~?Pw& K2
return; 2tEkj=fA-
if ((mid - l) >= THRESHOLD) [Ek7b*
mergeSort(data, temp, l, mid); M `M5'f
else (@VMH !3
insertSort(data, l, mid - l + 1); LEf^cM=>
if ((r - mid) > THRESHOLD) D%SlAzZ3
mergeSort(data, temp, mid + 1, r); X-Kh(Z
else T!kN)#S
insertSort(data, mid + 1, r - mid); n\'4
yYYSeH
for (i = l; i <= mid; i++) { ?4&e;83_#y
temp = data; vWv"
} 6l1jMm|= X
for (j = 1; j <= r - mid; j++) { g2ixx+`?|:
temp[r - j + 1] = data[j + mid]; lU\[aNs
} ]^7@}Ce_
int a = temp[l]; ^|(LAjet
int b = temp[r]; 5d^sA;c
for (i = l, j = r, k = l; k <= r; k++) { 5m 4P\y^a
if (a < b) { MrFQ5:=
data[k] = temp[i++]; Y=I'czg
a = temp; A,<E\
} else { iy!=6
data[k] = temp[j--]; n'LrQU
b = temp[j]; [yQt^!;
} _8J.fT$${
} sb*G!8j
} !;{7-~
HM1Fz\Sf
/** aFm_;\
* @param data &`r-.&Y
* @param l -3*]G^y2
* @param i mdg8,n
*/ k%#EEMh
private void insertSort(int[] data, int start, int len) { "Gzz4D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lgy<?LI\
} @Uvz8*b6
} 8/cX]J
} Gj?t_Zln
} fU}ub2_in
"+nRGEs6
堆排序： U9 s&
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package org.rut.util.algorithm.support; _D&598xx
|SSSH
import org.rut.util.algorithm.SortUtil; 4k1xy##
T3<4B!UB&
/** '<)n8{3Q5w
* @author treeroot eC4[AX6e
* @since 2006-2-2 8kIksy
* @version 1.0 2@],ZLa
*/ ML 9' |
public class HeapSort implements SortUtil.Sort{ )2o?#8J
h7oo7AP
/* (non-Javadoc) JPHL#sKyz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +3BN}
*/ iWkWR"ysy
public void sort(int[] data) { |YWD8 +
MaxHeap h=new MaxHeap(); adcE'fA<_
h.init(data); EME|k{W
for(int i=0;i h.remove(); ;JT-kw6l5K
System.arraycopy(h.queue,1,data,0,data.length); Q3~H{)[Kq
} a58H9w"u)
=y*IfG9b
private static class MaxHeap{ t{9GVLZ
0Mm)`!TLSW
void init(int[] data){ g:@#@1rB6
this.queue=new int[data.length+1]; oZgjQM$YP
for(int i=0;i queue[++size]=data; h(dvZ= %
fixUp(size); %wy.TN
} h;"4+uw
} ?l{nk5,?-Y
C{rcs'
private int size=0; ~ .g@hS8>
zC!t;*8a
private int[] queue; $h"\N$iSq
9cF[seE"0
public int get() { 8TKnL\aar
return queue[1]; 9TC,!0U{_.
} q3!bky\
@S;'@VC
public void remove() { /,yd+wcW#
SortUtil.swap(queue,1,size--); !e<^? r4
fixDown(1); K\r8g=U
} + &Eqk
file://fixdown YD6'#(
private void fixDown(int k) { (w3YvG.
int j; X+9>A.92
while ((j = k << 1) <= size) { ZLejcYS
if (j < size %26amp;%26amp; queue[j] j++; ouQ T
if (queue[k]>queue[j]) file://不用交换 rM%1GPVob
break; 4+8@`f>s
SortUtil.swap(queue,j,k); f$$/H>MJ
k = j; "KpGlY?^
} H7n>Vx:L-
} va@Lz&sAE%
private void fixUp(int k) { wP@(?z
while (k > 1) { \R_C&=
int j = k >> 1; Ti5-6%~&
if (queue[j]>queue[k]) r,p%U!S<hV
break; ZY+qA
SortUtil.swap(queue,j,k); O^ yG?b
k = j; 24eLB?H
} q0vQa
} ,f>k%_U}
Y:[u1~a
} *GPiOA a
Vc Z3 X4/
} #X1ND
wc4=VC"y
SortUtil： 0GeTSFj
usF.bkTp
package org.rut.util.algorithm; 8l`*]1.W<
#*Ctwl,T
import org.rut.util.algorithm.support.BubbleSort; 4!?eRY
import org.rut.util.algorithm.support.HeapSort; wmLs/:~
import org.rut.util.algorithm.support.ImprovedMergeSort; YS0<qSN
import org.rut.util.algorithm.support.ImprovedQuickSort; } q8ASYNc
import org.rut.util.algorithm.support.InsertSort; zrb}_
import org.rut.util.algorithm.support.MergeSort; Q![@c
import org.rut.util.algorithm.support.QuickSort; 8d'0N
import org.rut.util.algorithm.support.SelectionSort; (jE9XxQY
import org.rut.util.algorithm.support.ShellSort; 6i/(5 nQ
26h21Z16q
/** xy;;zOh`
* @author treeroot R\[e!g*I
* @since 2006-2-2 9yP;@y*d
* @version 1.0 'H;*W|:-]
*/ iH@UTE;
public class SortUtil { L!xi
public final static int INSERT = 1; Gd85kY@w7
public final static int BUBBLE = 2; gcT%c|.
public final static int SELECTION = 3; ?Ir:g=RP*
public final static int SHELL = 4; RA L~!"W
public final static int QUICK = 5; @q)d
public final static int IMPROVED_QUICK = 6; lThB2/tV\
public final static int MERGE = 7; [7y]n;Fy
public final static int IMPROVED_MERGE = 8; OneY_<*a<
public final static int HEAP = 9; D&y7-/
J|73.&B
public static void sort(int[] data) { >hIu2jm
sort(data, IMPROVED_QUICK); &};zvo~P.
} +NUG
private static String[] name={ X&H"51
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5{,<j\#L
}; W"{N Bi
8quaXVj^a
private static Sort[] impl=new Sort[]{ Z%UP6%
new InsertSort(), ,ig/s2ZG6X
new BubbleSort(), 8}:nGK|kx
new SelectionSort(), FS.L\MjV]U
new ShellSort(), V0mn4sfs
new QuickSort(), ]`WJOx4
new ImprovedQuickSort(), Mi_$">1-W
new MergeSort(), )^hbsMhO
new ImprovedMergeSort(), ?S=mybp
new HeapSort() N;%6:I./
}; f$QNg0v
@=u3ZVD
public static String toString(int algorithm){ JucY[`|JV
return name[algorithm-1]; jL}v9$
} OY({.uVdX
FS1z`wYP
public static void sort(int[] data, int algorithm) { >H,*H;6
impl[algorithm-1].sort(data); owv[M6lbD
} ^-'fW7[m
_yR^*}xJb
public static interface Sort { K3uRs{l|
public void sort(int[] data); u*9V&>o
} a 1*p*dM#
,a? oaPH
public static void swap(int[] data, int i, int j) { x,'!gT:j
int temp = data; [Ch.cE_
data = data[j]; M',?u
data[j] = temp; klhtKp_p
} F:DrX_O%
} _)-o1`*-