[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; 09<O b[%h
} YXxaD@
int i1=l; aObWd5~
int i2=mid+1; 9,=3D2x&
for(int cur=l;cur<=r;cur++){ B Jp\a7`;
if(i1==mid+1) ]5W0zNb*
data[cur]=temp[i2++]; l-4T Tg
else if(i2>r) ~Emeo&X
data[cur]=temp[i1++]; bFk >IifN
else if(temp[i1] data[cur]=temp[i1++]; n5dFp%k
else #4"(M9kf
data[cur]=temp[i2++]; N%!8I
} tjc3;9
} .VN"j
CrC1&F\dq
} v'0A$`w`
DK 4 8
改进后的归并排序: P.mz$M
K.c6n,'
package org.rut.util.algorithm.support; d{2+> >d
57IAH$n8o
import org.rut.util.algorithm.SortUtil; wjW>#DE
ocBfs^ aW
/** _cdrz)T
* @author treeroot ?#"rI6
* @since 2006-2-2 IMLk{y%6
* @version 1.0 WGFp<R
*/ GlYNC&,VL
public class ImprovedMergeSort implements SortUtil.Sort { @~%R%Vu
a5jc8S>
private static final int THRESHOLD = 10; 5BnO-[3
Sc'z vlq
/* uu L"o
* (non-Javadoc) OW1i{
* n{JBC%^g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q!8AFLff4
*/ lPyGL-Q
public void sort(int[] data) { [sJ f)<
int[] temp=new int[data.length]; (`PgvBL:
mergeSort(data,temp,0,data.length-1); `%}SK~<R
} [:<CgU9C
! iuDmL
private void mergeSort(int[] data, int[] temp, int l, int r) { +-YMW;5
int i, j, k; U_ n1QU
int mid = (l + r) / 2; gSQq
if (l == r) 'fO[f}oa_.
return; _7es_w}R
if ((mid - l) >= THRESHOLD) 3T^f#UT
mergeSort(data, temp, l, mid); Q qGf*
else u;p.:{'
insertSort(data, l, mid - l + 1); P34UD:
if ((r - mid) > THRESHOLD) x01n
mergeSort(data, temp, mid + 1, r); ^`>,~$Q
else #DK@&Gv
insertSort(data, mid + 1, r - mid); !J`>;&
vYQ0e:P
for (i = l; i <= mid; i++) { tY~gn|M
temp = data; h>\T1PM
} .l?sYe64S
for (j = 1; j <= r - mid; j++) { 4po zTe
temp[r - j + 1] = data[j + mid]; {I'8+~|pZL
} ;NNYJqWd^]
int a = temp[l]; ~I[Z2&I
int b = temp[r]; hG~4i:p <
for (i = l, j = r, k = l; k <= r; k++) { pu#h:nb>88
if (a < b) { o2M+=O@
data[k] = temp[i++]; K8[vJ7(!|
a = temp; Qj;wklq
} else { o 4G%m>$
data[k] = temp[j--]; 2;h4$^`dt
b = temp[j]; O@.C.5Ep
} &V/n!|q<H
} FW* k O
} 'fpm] *ig
|@'/F#T
/** 1;_tu
* @param data k1Z"Qmz
* @param l #dyz
* @param i qw^kA?
*/ Bgb~Tz'
private void insertSort(int[] data, int start, int len) { .*FBr7rE\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ay~c@RXW
} <ZmC8&Uo
} co!o+jP
} ~,#zdm1r@
} 2J?ON|2M
}%e"A4v
堆排序： K1y]
D{'>G@nLQ
package org.rut.util.algorithm.support; j v9DQr
&CP0T:h
import org.rut.util.algorithm.SortUtil; r?cDyQE
w:[1,rRvT
/** 3=YK" 5J
* @author treeroot $D;/b+a
* @since 2006-2-2 vNdMPulr{
* @version 1.0 /%qw-v9qPV
*/ $z1W0
public class HeapSort implements SortUtil.Sort{ WFHS8SI
72Zp%a=
/* (non-Javadoc) sA^_I6>M"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X8(H#Ef[
*/ wY$'KmNW
public void sort(int[] data) { kT7x !7C
MaxHeap h=new MaxHeap(); [\i0@
h.init(data); {?X#E12vf
for(int i=0;i h.remove(); k@}?!V*l
System.arraycopy(h.queue,1,data,0,data.length); 1=U(ZX+u
} cXcrb4IKD
k[_)5@2
private static class MaxHeap{ W^(:\IvV
gteG*pi
void init(int[] data){ BH`%3Mw
this.queue=new int[data.length+1]; 9^yf'9S1
for(int i=0;i queue[++size]=data; YJ6y]r K2,
fixUp(size); pt/UY<@yoN
} 2il)@&^
} p?@R0]
a,$v;s/
private int size=0; s)dL^lj;
#\P\(+0K
private int[] queue; $m hIXA.
yW=I*f
public int get() { rnOg;|u8
return queue[1]; 9`a1xnL
} ^<$$h
b-/8R|Mem
public void remove() { 6H]rO3[8
SortUtil.swap(queue,1,size--); Sa8KCWgWh
fixDown(1); # dA-dN
} e7O9q8b
file://fixdown crwui8
private void fixDown(int k) { MBIlt 1P
int j; :m&cm%W]ts
while ((j = k << 1) <= size) { Q<c{$o
if (j < size %26amp;%26amp; queue[j] j++; t^k^e{,q#
if (queue[k]>queue[j]) file://不用交换 `d,v
break; l* ap$1'
SortUtil.swap(queue,j,k); L2ybL#dz
k = j; Y5/SbQYf1
} e=H,|)P
} )'1rZb5
private void fixUp(int k) { HL`=zB%
while (k > 1) { ELvP<Ny}
int j = k >> 1; )%zOq:{\5
if (queue[j]>queue[k]) 0[ BPmO6
break; #/,WgsAC
SortUtil.swap(queue,j,k); swTur
k = j; Y[R;UJE`5
} 2{Johqf
} Gi+ZI{)
<i$ud&D
} /cXVJ(#j
<E&8g[x6
} fep8hf B;
vVyX[ZZ
SortUtil： C$x r)_
J1\H^gyW)
package org.rut.util.algorithm; US'rhSV
>qL-a*w:a
import org.rut.util.algorithm.support.BubbleSort; B)`@E4i
import org.rut.util.algorithm.support.HeapSort; Z(|'zAb^
import org.rut.util.algorithm.support.ImprovedMergeSort; ' X9D(?O
import org.rut.util.algorithm.support.ImprovedQuickSort; *dpKo&y
import org.rut.util.algorithm.support.InsertSort; n# 4e1n+I
import org.rut.util.algorithm.support.MergeSort; n7p,{KSQ
import org.rut.util.algorithm.support.QuickSort; 1 k\~%
import org.rut.util.algorithm.support.SelectionSort; L#~z#
import org.rut.util.algorithm.support.ShellSort; (Do](C
8h '~*
/** N3m~nEj
* @author treeroot KmX?W/%R
* @since 2006-2-2 K^Ixu~
* @version 1.0 uG^RU\(
*/ INF}~DN]
public class SortUtil { L3J .Oh
public final static int INSERT = 1; *Z}9S9YtN
public final static int BUBBLE = 2; Naa "^
public final static int SELECTION = 3; \(4kEB2s$
public final static int SHELL = 4; Ap)pOD7
public final static int QUICK = 5; qZB}}pM#
public final static int IMPROVED_QUICK = 6; s;Sv@=\
public final static int MERGE = 7; gCP f1z
public final static int IMPROVED_MERGE = 8; wqE+hKs,
public final static int HEAP = 9; zy\R>4i'#Q
5tUN'KEbN
public static void sort(int[] data) { *V[6ta'
sort(data, IMPROVED_QUICK); =2&Sw(6j
} @E !`:/k
private static String[] name={ \wb0%> 0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &Ndq^!e
}; "yG*Kh7ur
I%'6IpR"d
private static Sort[] impl=new Sort[]{ .[:2M9Rx
new InsertSort(), ;vp[J&=
new BubbleSort(), _@A%t&l
new SelectionSort(), BW{&A&j
new ShellSort(), nS9 kwaO
new QuickSort(), H^JwaF
new ImprovedQuickSort(), 3v,Bg4[i
new MergeSort(), )Q)H!yin
new ImprovedMergeSort(), Xd@_:ds
new HeapSort() 8=DZ;]XD.
}; v?<Tkw ^F
)2g-{cYv
public static String toString(int algorithm){ oeF0t'%
return name[algorithm-1]; =2R0 g2n
} o?((FW5.;
d45mKla(V
public static void sort(int[] data, int algorithm) { `\M}~
impl[algorithm-1].sort(data); ]]!&>tOlI
} CMviR<.
K;P<c,9X/
public static interface Sort { c?7Wjy
public void sort(int[] data); ?7cT$/4
} yd~}CF
4u+4LB*
public static void swap(int[] data, int i, int j) { AEO7I f@
int temp = data; z3C@0v=u>
data = data[j]; WEsX+okj
data[j] = temp; V4tObZP3Ff
} f;cY&GC
} {/Qg4pc!