[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; oO4 Wwi
} 0omg%1vt<A
int i1=l; !ACWv*pW
int i2=mid+1; 2>3gC_^go
for(int cur=l;cur<=r;cur++){ K`nI$l7hg
if(i1==mid+1) j3bTa|UdT
data[cur]=temp[i2++]; [9WtoA,kx
else if(i2>r) 6.Nu[-?
data[cur]=temp[i1++]; >a;^=5E
else if(temp[i1] data[cur]=temp[i1++]; `A)9
else IwIk;pB O
data[cur]=temp[i2++]; .Y%)&
} ~O)Uz|
} $SQ8,Y,
bN$!G9I!,
} rdsm /^,s
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改进后的归并排序: 28;D>6c
pHFh7-vj
package org.rut.util.algorithm.support; &rX..l
)K8k3]y&
import org.rut.util.algorithm.SortUtil; W%f:+s}cI
s7CoUd2
/** Hut au^l
* @author treeroot zn T85#]\@
* @since 2006-2-2 "-4V48ci
* @version 1.0 66?!"w
*/ mAFqA
public class ImprovedMergeSort implements SortUtil.Sort { l[O!_bH
2roPZj
private static final int THRESHOLD = 10; x+vNA J
h94SLj]
/* ~ySmN}3~'
* (non-Javadoc) r3l}I6
* bh&,*Y6=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @^y/V@lDm
*/ *hAeA+:
public void sort(int[] data) { z[DUktZl
int[] temp=new int[data.length]; URDb
mergeSort(data,temp,0,data.length-1); ObIi$uJX
} TR,,=3n
(XJehdB0
private void mergeSort(int[] data, int[] temp, int l, int r) { j=)Cyg3_%
int i, j, k; XnQd(B`M
int mid = (l + r) / 2; 2B_6un];W
if (l == r) ;^:9huN
return; ch<Fi%)
if ((mid - l) >= THRESHOLD) n37C"qJ/i
mergeSort(data, temp, l, mid); ]<q{0.
else $V~r*#$.
insertSort(data, l, mid - l + 1); GA{>=Q_~
if ((r - mid) > THRESHOLD) $EbxV"b+
mergeSort(data, temp, mid + 1, r); xDu11W+g
else f)q\RJA)X
insertSort(data, mid + 1, r - mid); =y8HOT}8
^>uzMR!q5
for (i = l; i <= mid; i++) { >U^AIaW
temp = data; !arcQ:T@G
} YWeEvo(,=
for (j = 1; j <= r - mid; j++) { +~=>72/r
temp[r - j + 1] = data[j + mid]; p8BAan3
} FyYQ4ov0&o
int a = temp[l]; )1O *~%
int b = temp[r]; __c:$7B/4U
for (i = l, j = r, k = l; k <= r; k++) { |v8>22y
if (a < b) { 9Ps:]Kp!vN
data[k] = temp[i++]; ]DdD FLM
a = temp; 4x=rew>Ew
} else { Mk= tS+
data[k] = temp[j--]; Hjli)*ev
b = temp[j]; *}3e'0`
} jK\2y|&&c
} K;G1cFFyG
} f3U#|(%(*
A\ze3fmV
/** bslv_OxJ
* @param data jHBn^Nly
* @param l %96JH YcX
* @param i q|om^:n.
*/ n.67f
private void insertSort(int[] data, int start, int len) { E8=.TM]L
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "j3Yu4_ks
} |Wj)kr !|
} SxC$EQgL
} $I-$X?
} ExI?UGT
3j0/&ON
堆排序： JGf6*D"O
8nQlmWpJ
package org.rut.util.algorithm.support; a9"x_IVU
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import org.rut.util.algorithm.SortUtil; @\Sa)
oScHmGFv
/** RX>kOp29
* @author treeroot M{zzXE[@
* @since 2006-2-2 A) p}AEBc
* @version 1.0 \,[Qg#W$u
*/ ~.AUy%$_g+
public class HeapSort implements SortUtil.Sort{ 1[J&^@t[h6
-hL8z$}
/* (non-Javadoc) )rz4IfE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {LJwW*?
*/ 9+9}^B5@A
public void sort(int[] data) { '/b,3:
MaxHeap h=new MaxHeap(); dnNC = siY
h.init(data); d#I'9O0&
for(int i=0;i h.remove(); k$}XZ,Q
System.arraycopy(h.queue,1,data,0,data.length); O?D*<rwD
} kJ>l,AD/
X6!u(plVQ
private static class MaxHeap{ *FR Eh@R
;%]Q%7
void init(int[] data){ \Yz>=rY
this.queue=new int[data.length+1]; =]\,I'
for(int i=0;i queue[++size]=data; :cG_aOkid
fixUp(size); _+wou(1y
} CCp{ZH s
} m'r6.Hp3Ng
+f+x3OMX3
private int size=0; VGM8&J{o'
s}`ydwSg8
private int[] queue; w@nN3U+
;_of'
public int get() { waQNX7Xdn
return queue[1]; HvK<>9
} ;yY>SaQ
3A4?9>g)KU
public void remove() { #; E,>0
SortUtil.swap(queue,1,size--); jIZQ/xp8_
fixDown(1); !V Zl<|
} :Py/d6KK
file://fixdown Z5[ t/
private void fixDown(int k) { hBz~FB];&
int j; 9/{+,RpC
while ((j = k << 1) <= size) { ai`fP{WlX
if (j < size %26amp;%26amp; queue[j] j++; f<uLbJ6
if (queue[k]>queue[j]) file://不用交换 g!V;*[
break; 8Y sn8
SortUtil.swap(queue,j,k); qeBfE
k = j; (#eB%
} Bg"b,&/^u
} @YU}0&
private void fixUp(int k) { ~ra2Xyl
while (k > 1) { +~ :1H.
int j = k >> 1; b,~4O~z
if (queue[j]>queue[k]) BGodrb1
break; wP6~HiC
SortUtil.swap(queue,j,k); $oH?oD1
k = j; ZdlZ,vK^.
} _V1O =iu-
} Up*p*(d3
hrNri$
} |M[E^
\QBODJ1
} 6BFtY+.y
Mm:6+
SortUtil： .O3i"X]
pYI`5B4
package org.rut.util.algorithm; Od>Ta_
(pH13qU5
import org.rut.util.algorithm.support.BubbleSort; >72j,0=e
import org.rut.util.algorithm.support.HeapSort; zr\I1v]?1#
import org.rut.util.algorithm.support.ImprovedMergeSort; l\ts!p4f$
import org.rut.util.algorithm.support.ImprovedQuickSort; hp%|n:.G
import org.rut.util.algorithm.support.InsertSort; 4M6o+WV
import org.rut.util.algorithm.support.MergeSort; =KmjCz:
import org.rut.util.algorithm.support.QuickSort; XtNe) Ry
import org.rut.util.algorithm.support.SelectionSort; vXR-#MS`}
import org.rut.util.algorithm.support.ShellSort; @PZ&/F^
a_L&*%;
/** f&js,NU"
* @author treeroot 1G=1FGvP
* @since 2006-2-2 ^%)'wDK
* @version 1.0 6QLWF@
*/ }7IS:"tu
public class SortUtil { hc"+6xc
public final static int INSERT = 1; H"WkyvqXb
public final static int BUBBLE = 2; 82YTd(yB
public final static int SELECTION = 3; $s/N;E!t
public final static int SHELL = 4; 9-Ikd>9
public final static int QUICK = 5; 0J7[n*~
public final static int IMPROVED_QUICK = 6; 4G;+ETp
public final static int MERGE = 7; f%an<>j^w
public final static int IMPROVED_MERGE = 8; G=jdb@V/?
public final static int HEAP = 9; y)"aQJ>
Qa5<go{
public static void sort(int[] data) { 9 @!Og(l
sort(data, IMPROVED_QUICK); LU?X|{z
} KY!
private static String[] name={ sI@m"A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ZQD_w#0j
}; }wC pr.@
T3@wNAAU
private static Sort[] impl=new Sort[]{ w[uK3Av
new InsertSort(), YS{])+s
new BubbleSort(), fk5!/>X
new SelectionSort(), R KFz6t
new ShellSort(), W7WHH \L/O
new QuickSort(), oR[,?qu@f
new ImprovedQuickSort(), ipQJn_:2
new MergeSort(), wlAlIvIT
new ImprovedMergeSort(), 8%_XJyg
new HeapSort() [kt!\-
}; hW~,Uqy
z~L4BY@z
public static String toString(int algorithm){ M+gQN}BAr
return name[algorithm-1]; ;'`T
} [`Ol&R4k
d8C?m*3J
public static void sort(int[] data, int algorithm) { !?DPI)
impl[algorithm-1].sort(data); 4+:Q"
} );kO27dg
2Y(Phw2%
public static interface Sort { ~x)Awdlu
public void sort(int[] data); QjWv?tm
} 'aBX>M
u&I?LZ-=,
public static void swap(int[] data, int i, int j) { TKx.`Cf m
int temp = data; U-QK
data = data[j]; O/e5LA
data[j] = temp; Gx|$A+U
} jF<Y,(C\
} rqxoqcZ