[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; NydoX9
} NzID[8`
int i1=l; );z/ @Q
int i2=mid+1; 9@p+g`o
for(int cur=l;cur<=r;cur++){ g7LS
if(i1==mid+1) G`jJKiC
data[cur]=temp[i2++]; .)=j~}\
else if(i2>r) VelX+|w
data[cur]=temp[i1++]; l) )Cvre+
else if(temp[i1] data[cur]=temp[i1++]; R^4 j0L
else @JD!.3
data[cur]=temp[i2++]; 7bam`)n
} %Zu+=IZ
} /@s(8{;
Q S.w#"X[
} Z2\Xe~{
4L6'4t"s
改进后的归并排序: llBW*4'
24_/JDz
package org.rut.util.algorithm.support; >R6>*|~S
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import org.rut.util.algorithm.SortUtil; /kd6Yq(y
ud,_^Ul
/** 0R?LWm j
* @author treeroot klC48l
* @since 2006-2-2 +Xr87x;
* @version 1.0 nR$Q~`
*/ 5./(n7d_
public class ImprovedMergeSort implements SortUtil.Sort { Nj4^G ~_
PHn3f;I
private static final int THRESHOLD = 10; o{ \r1<D
KA0_uty/T
/* XbAoW\D(
* (non-Javadoc) _"";SqVB
* IY9##&c3>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZNbb8v
*/ 4^BHJOvs
public void sort(int[] data) { NA8$G|.?
int[] temp=new int[data.length]; wn{DY v7B
mergeSort(data,temp,0,data.length-1); 'St\$X
} J{5&L &4
GCA?sFwo>
private void mergeSort(int[] data, int[] temp, int l, int r) { j%s:d(H`
int i, j, k; Kkds^v6
int mid = (l + r) / 2; rv97Wm+
if (l == r) {5gh.
return; -r"h[UV)
if ((mid - l) >= THRESHOLD) iYxpIqWw
mergeSort(data, temp, l, mid); ::rKW*?
else -}*YfwK
insertSort(data, l, mid - l + 1); MXU8QVSY"
if ((r - mid) > THRESHOLD) 41`&/9:"_M
mergeSort(data, temp, mid + 1, r); 4m$Xjj`vE
else "*aL(R
insertSort(data, mid + 1, r - mid); dD8f`*"*=
09u@-
for (i = l; i <= mid; i++) { onAC;<w
temp = data; Vnq&lz%QqC
} 8L*P!j9`EY
for (j = 1; j <= r - mid; j++) { CR<Nau>
temp[r - j + 1] = data[j + mid]; "Dwaq*L
} L2 tSKw~
int a = temp[l]; PG/xX H
int b = temp[r]; d$`NApr
for (i = l, j = r, k = l; k <= r; k++) { ueazAsk3g
if (a < b) { RZ&T\;m,7
data[k] = temp[i++]; v81H!c.*
a = temp; n$T'gX#5
} else { <U() *0
data[k] = temp[j--]; xT$9M"
b = temp[j]; kMLWF
} \.<V~d?
} 564)ha/^(
} V<;w
r/vRaOg>X
/** iv/!c Mb
* @param data noa=wy
* @param l sC.aT(meJ
* @param i ,s,VOyr @F
*/ ,2YkQ/>
private void insertSort(int[] data, int start, int len) { KDX34Fr1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \{ui{8+G
} nZ 0rxx[V?
} U&\8~h
} L(2KC>GvA
} %kJ_o*"
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堆排序： MdOQEWJ$|
5L}qL?S`x|
package org.rut.util.algorithm.support; zLxO\R!d
"NamP\hj
import org.rut.util.algorithm.SortUtil; hkq[xgX
ZsPT!l,
/** =i/7&gC
* @author treeroot C"P40VQoo
* @since 2006-2-2 ,:QzF"MV
* @version 1.0 'bXm,Ed
*/ 1c} %_Z/
public class HeapSort implements SortUtil.Sort{ A%pBvULH
#X(KW&;m
/* (non-Javadoc) .;0?r9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IE-c^'W=}m
*/ Iu`xe
public void sort(int[] data) { S=o1k
MaxHeap h=new MaxHeap(); S6r$n
h.init(data); =hO0@w
for(int i=0;i h.remove(); HNRZ59Yyq
System.arraycopy(h.queue,1,data,0,data.length); X;I;CZ={
} sacaL4[_<
jz%%r Q(
private static class MaxHeap{ i0%S6vmaS
7aJLC!
void init(int[] data){ ^$7Lmd.qI
this.queue=new int[data.length+1]; ~EVD NnHEr
for(int i=0;i queue[++size]=data; a;Q.R
fixUp(size); q.l"Y#d
} Fx.hti
} +d0&(b
\WnI&nu
private int size=0; J<<0U;
<= xmJx-V
private int[] queue; EhkvC>y
,[lS)`G
public int get() { ;/3 <
return queue[1]; i 5"g?Wa2N
} CVh^~!"7j
6p X[m{
public void remove() { yu'2
SortUtil.swap(queue,1,size--); El~x$X*
fixDown(1); s 9,?"\0Zm
} "-'w,g
file://fixdown LP8Stj JP
private void fixDown(int k) { #[^?f[9r
int j; v(?^#C>6W
while ((j = k << 1) <= size) { ,iXE3TN;W
if (j < size %26amp;%26amp; queue[j] j++; Cw<bu|?
if (queue[k]>queue[j]) file://不用交换 gF@51K
break; 5h9`lS2
SortUtil.swap(queue,j,k); AS34yM(h
k = j; `,mE '3&
} I-E}D"F;p[
} "(6]K}k@
private void fixUp(int k) { #-ioLt%
while (k > 1) { ZE@!s3\
int j = k >> 1; 30(O]@f~
if (queue[j]>queue[k]) 2Rc'1sCth-
break; xD}ha
SortUtil.swap(queue,j,k); 2},|RQETy
k = j; dF2 &{D"J
} ef\Pu\'U
} /;t42 g9w
@aU%1h5W;l
} 4+t9"SD
c]`}DH,TJ
} Ds4n>V,o
#:{Bd8PS
SortUtil： OXy>Tlv
36154*q
package org.rut.util.algorithm; N#-P}\Q9
;?>xuC$
import org.rut.util.algorithm.support.BubbleSort; +1j@n.)ft
import org.rut.util.algorithm.support.HeapSort; [-)N}rL>
import org.rut.util.algorithm.support.ImprovedMergeSort; (Yz EsY
import org.rut.util.algorithm.support.ImprovedQuickSort; `p@YV(
import org.rut.util.algorithm.support.InsertSort; ~yH<,e
import org.rut.util.algorithm.support.MergeSort; i]:T{2
import org.rut.util.algorithm.support.QuickSort; 2f8fA'|O
import org.rut.util.algorithm.support.SelectionSort; `B{N3Kxbp
import org.rut.util.algorithm.support.ShellSort; [HJ^'/bB'
>yC1X|d~t
/** +$KUy>
* @author treeroot Np4';H
* @since 2006-2-2 Hmt}@
* @version 1.0 nYJ)M AG@
*/ }(h_ztw
public class SortUtil { >t|u 8/P
public final static int INSERT = 1; =.9L/74@
public final static int BUBBLE = 2; Xqt3p6
public final static int SELECTION = 3; uXiAN#1
public final static int SHELL = 4; <StyO[
public final static int QUICK = 5; G992{B
public final static int IMPROVED_QUICK = 6; !/W[6'M#p
public final static int MERGE = 7; *ip2|2G$
public final static int IMPROVED_MERGE = 8; 8=rD'*
public final static int HEAP = 9; e_Na_l]
EQDsbG0x
public static void sort(int[] data) { QMoh<[3qu
sort(data, IMPROVED_QUICK); bce>DLF
} $;1#gq%
private static String[] name={ [:-Ltfr
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,E{z+:Es
}; RF/I*5
z;6Tp
private static Sort[] impl=new Sort[]{ @^8tk3$Y
new InsertSort(), bmT_tNz
new BubbleSort(), X}.y-X#v5J
new SelectionSort(), ~y.{WuUD
new ShellSort(), (9r\YNK
new QuickSort(), "oZ-W?IKE
new ImprovedQuickSort(), h}&WBN
new MergeSort(), T8& kxp
new ImprovedMergeSort(), $Hcp.J[O
new HeapSort() 8W$uw~|dw
}; tMxa:h;/x
vT)(#0>z
public static String toString(int algorithm){ R=g~od[N_
return name[algorithm-1]; 7iCH$}
} ~Zbr7zVn
J0BA@jH5
public static void sort(int[] data, int algorithm) { %$/t`'&o-
impl[algorithm-1].sort(data); hu (h'
} T `x:80
TwBwqQ)t
public static interface Sort { b/IT8Cm3
public void sort(int[] data); E/mp.f2!
} .LDK+c
tbHU(#~
public static void swap(int[] data, int i, int j) { ~1xln?Q
int temp = data; !+tz<9BBY
data = data[j]; m\>531&
data[j] = temp; QeP8Vl&e:
} ZS0=xS5q)
} L&$ X\\Lv^