[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; ILCh1=?{9r
} N@PuC>
int i1=l; ;\th.!'rn
int i2=mid+1; w#1BHx
for(int cur=l;cur<=r;cur++){ 46vC/
if(i1==mid+1) {eU>E/SQ
data[cur]=temp[i2++]; p@78Xmu?q
else if(i2>r) ddL3wQ
data[cur]=temp[i1++]; ;X+0,K3c
else if(temp[i1] data[cur]=temp[i1++]; >C,0}lj
else rZ,qHM
data[cur]=temp[i2++]; tzN9d~JZ
} ds*gL ~k^
} FqJd
qVU<jt
} GipiO5)1C
X#T|.mCdC
改进后的归并排序: 9z4F/tUq
Pac ^=|h<q
package org.rut.util.algorithm.support; h HHR]e5:
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import org.rut.util.algorithm.SortUtil; G>pedE\
(w-"1(
/** K cex%.
* @author treeroot O=}w1]
* @since 2006-2-2 D;JZ0."
* @version 1.0 !43nL[]
*/ +m JG:n
public class ImprovedMergeSort implements SortUtil.Sort { A23K!a2u&
\@PMj"p|:
private static final int THRESHOLD = 10; i$pUUK
8/2Wq~&
/* UK OhsE
* (non-Javadoc) #>_t[9;
* .;31G0<w2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ();Z,A
*/ ecm+33C
public void sort(int[] data) { >W+,(kAS
int[] temp=new int[data.length]; e}O&_j-
mergeSort(data,temp,0,data.length-1); )T '?"guh`
} 53/$8=
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private void mergeSort(int[] data, int[] temp, int l, int r) { MZVbOcSAd
int i, j, k; At>e4t2@
int mid = (l + r) / 2; }vZfp5Y
if (l == r) G l/3*J
return; 2G|}ENC
if ((mid - l) >= THRESHOLD) 2KXFXR
mergeSort(data, temp, l, mid); &2:WezDF
else !rgXB(
insertSort(data, l, mid - l + 1); zx)}XOYf
if ((r - mid) > THRESHOLD) <O) if^
mergeSort(data, temp, mid + 1, r); ;xq;c\N
else @<P;F
insertSort(data, mid + 1, r - mid); )j]f ]8
j*2/[Eq
for (i = l; i <= mid; i++) { Qv,ORm h5
temp = data; Wv3p!zW3I
} n<EIu
for (j = 1; j <= r - mid; j++) { Af]BR_-
temp[r - j + 1] = data[j + mid]; l
} B$c'^ )
int a = temp[l]; /slCK4vFc
int b = temp[r]; H1~9f{
for (i = l, j = r, k = l; k <= r; k++) { DB"z93Mr<K
if (a < b) { Z3zD4-p$_
data[k] = temp[i++]; LP7jCt
a = temp; =WF@S1
} else { Fu?_<G%Ynp
data[k] = temp[j--]; w)go79
b = temp[j]; c9gm%
} s'/_0
} /hg^hF
} J}Z\I Y,
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/** %b pQ=
* @param data 0(5qVJ12
* @param l 3#fg 2
* @param i b7'A5]X
*/ cooicKS7
private void insertSort(int[] data, int start, int len) { *W=1yPP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {'P?wv
} \Ogs]4
} E08!a
} r 'ioH"=
} }K.)yv n
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堆排序： cgcU2N6y;
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package org.rut.util.algorithm.support; (CAVOed
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import org.rut.util.algorithm.SortUtil; JWM4S4yZHR
<YG 42,N
/** /L`qOr2E
* @author treeroot i @M^l`w
* @since 2006-2-2 , Sf:R4=
* @version 1.0 c#9=o;1El
*/ j`u2\ ;
public class HeapSort implements SortUtil.Sort{ WYvcN8F
f#38QP-T
/* (non-Javadoc) <@>icDFEHn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gBgaVG
*/ G #$r)S
public void sort(int[] data) { rJ4A9d3:
MaxHeap h=new MaxHeap(); mst;q@
h.init(data); 'uqY%&U
for(int i=0;i h.remove(); W'zI~'K
System.arraycopy(h.queue,1,data,0,data.length); @gx]3t*]I
} YFcMU5_F
]7,0}q.
private static class MaxHeap{ Q9X+H4`}y
Q >h7H{c
void init(int[] data){ 0 4ceDe
this.queue=new int[data.length+1]; !9S!zRy@
for(int i=0;i queue[++size]=data; R-Tf9?)
fixUp(size); TY+Rol;!
} sEb*GF*.V
} lR ZuXo9<
]o9^?iU]
private int size=0; Q:b>1
_P_R`A)"
private int[] queue; Re;[S[D7
Zh:@AFz:R
public int get() { W1}d6Sbg
return queue[1]; =b3<}]
} -!j5j:RR
[r1\FF@v,
public void remove() { > W^"*B
SortUtil.swap(queue,1,size--); )P W Zc?M
fixDown(1); zM%2h:*+{
} EzU=q E
file://fixdown ]D>\Z(b
private void fixDown(int k) { x50ZwV&j
int j; 78'3&,+si
while ((j = k << 1) <= size) { N,ihQB5
if (j < size %26amp;%26amp; queue[j] j++; Xj6?,J
if (queue[k]>queue[j]) file://不用交换 s=&x%0f%
break; `g'9)Xf4KT
SortUtil.swap(queue,j,k); TwZmZE ?!
k = j; G{'`L)~3N
} \S#![NC
} Q=498Y~x
private void fixUp(int k) { ynq^ztBVe
while (k > 1) { l5Q-M{w0x
int j = k >> 1; d?GB#N|+g
if (queue[j]>queue[k]) Eye.#~
break; dr=h;[Q'
SortUtil.swap(queue,j,k); ?&XpwJw:~
k = j; om0g'Qa
} >` |sBx
} 35#"]l"
w2]]##J
} Kb#Z(C9
csv;u'
} DUs0L\
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SortUtil： )O6_9f_
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package org.rut.util.algorithm; <`=(Ui$fD
O&PrO+&
import org.rut.util.algorithm.support.BubbleSort; FHyyZ{"
import org.rut.util.algorithm.support.HeapSort; wn>?r ?KIB
import org.rut.util.algorithm.support.ImprovedMergeSort; lDtl6r/
import org.rut.util.algorithm.support.ImprovedQuickSort; Ix+\oq,O
import org.rut.util.algorithm.support.InsertSort; >f~y2YAr
import org.rut.util.algorithm.support.MergeSort; ?wj1t!83
import org.rut.util.algorithm.support.QuickSort; L%[b6<
import org.rut.util.algorithm.support.SelectionSort; &_<!zJ;Hn
import org.rut.util.algorithm.support.ShellSort; zqGo7;;#
#7,;/rtO7
/** 8CGjI?j
* @author treeroot IaYy5Rw
* @since 2006-2-2 G+W0X
* @version 1.0 /: }"Zb
*/ ~`CWpc:
public class SortUtil { 4wx_@8
public final static int INSERT = 1; k9oLJ<.k
public final static int BUBBLE = 2; e_t""h4D
public final static int SELECTION = 3; af;~<oa
public final static int SHELL = 4; i{nFk',xX
public final static int QUICK = 5; Xp_G9I,+
public final static int IMPROVED_QUICK = 6; p V`)
public final static int MERGE = 7; %b3s|o3An
public final static int IMPROVED_MERGE = 8; JQ"w{O
public final static int HEAP = 9; L=-v>YL+
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public static void sort(int[] data) { |7E1yu
sort(data, IMPROVED_QUICK); jf~-;2
} @6z]Xb
private static String[] name={ 8\_YP3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #bdSH)V
}; -ZE]VO*F
C\5"Kb
private static Sort[] impl=new Sort[]{ :x@j)&
new InsertSort(), ZuVucP>>_d
new BubbleSort(), =MokbK2
new SelectionSort(), GMYfcZ/,K
new ShellSort(), i.6+CA
new QuickSort(), -|3feYb'
new ImprovedQuickSort(), }E](NvCq
new MergeSort(), $]S*(K3U~
new ImprovedMergeSort(), 85]3y%f9
new HeapSort() C:@JLZB
}; HD{2nZT
VF] ~J=>i
public static String toString(int algorithm){ u(g0Ob
return name[algorithm-1]; t73" d#+
} M"<B@p]rk:
B|6_4ry0U
public static void sort(int[] data, int algorithm) { QwgP+ M+
impl[algorithm-1].sort(data); "1%YtV5R{
} EnnE@BJ"
6]5e(J{Fz
public static interface Sort { YO`V'6\
public void sort(int[] data); ?'r=>'6D
} |$a!Zx94^
HmZ*
public static void swap(int[] data, int i, int j) { d{G*1l(X
int temp = data; We*&\e+"T
data = data[j]; *B1%-
data[j] = temp; 0GP\*Y8
} "jMSF@lr
} k_hs g6Ur.