[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; _8 C:Md`
} w. c]
int i1=l; F`Ld WA
int i2=mid+1; D$?}M>
for(int cur=l;cur<=r;cur++){ 0FAe5 BE7
if(i1==mid+1) 9 $&$Fe
data[cur]=temp[i2++]; -bP_jIZF;g
else if(i2>r) Ht,+KbB
data[cur]=temp[i1++]; "/kTEp
else if(temp[i1] data[cur]=temp[i1++]; w}rsboU
else E+"m@63
data[cur]=temp[i2++]; 'kb|!
} Cs2F/M'
} Gnthz0\]{
"?HDv WP=w
} 2kSN<jMr
b+#A=Z+Pr
改进后的归并排序: y_:~
3:g~@PB
package org.rut.util.algorithm.support; ~PZIYG"D
0ZAT;eaB
import org.rut.util.algorithm.SortUtil; <=Z`]8
Jfs_9g5
/** I xk+y?
* @author treeroot MszX9wl
* @since 2006-2-2 &:?2IAe
* @version 1.0 X/qLg+X
*/ WV&grG|
public class ImprovedMergeSort implements SortUtil.Sort { y#iQ
uGz>AW8a3
private static final int THRESHOLD = 10; vuoD~=z
.|g|X8X
/* FoKAF &h7
* (non-Javadoc) N<e72x
* kSUpEV+/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !(i}FFn{:
*/ G~X93J
public void sort(int[] data) { _I/uW|>
int[] temp=new int[data.length]; (x!Tb2mlk
mergeSort(data,temp,0,data.length-1); GwM(E^AG
} 2A(?9 R9&h
p0sq{d~
private void mergeSort(int[] data, int[] temp, int l, int r) { }UzRFIcv
int i, j, k; 231,v,X[
int mid = (l + r) / 2; ;7*R;/
if (l == r) G?dxLRy.do
return; nXJG4$G
if ((mid - l) >= THRESHOLD) We)l_>G
mergeSort(data, temp, l, mid); a+=.(g
else 6F:<c
insertSort(data, l, mid - l + 1); [k{2)g
if ((r - mid) > THRESHOLD) :G[6c5j|V
mergeSort(data, temp, mid + 1, r); xe@11/F
else Vo`,|3^
insertSort(data, mid + 1, r - mid); 8Cef ]@x
.H#<yPty
for (i = l; i <= mid; i++) { $mu*iW\{
temp = data; !m:rtPD'
} U+ANSW/
for (j = 1; j <= r - mid; j++) { .^!<cFkCE
temp[r - j + 1] = data[j + mid]; TsF>Y""*M
} "pMx(
int a = temp[l]; Op5S'
int b = temp[r]; U#6<80Ke
for (i = l, j = r, k = l; k <= r; k++) { [I6&|Lz>
if (a < b) { nsN|[E8
data[k] = temp[i++]; &rfl(&\oUi
a = temp; jBMGm"NE
} else { uA;vW\fHr
data[k] = temp[j--]; C8W4~~1S
b = temp[j]; 9D[Jn}E:
} /8Ru O
} 0BrAgv"3a_
} $_f"NE}
~-2Gx HO`
/** 9$*O^
* @param data _?oofE:{
* @param l Z/G?wD|B
* @param i D^)?*(
*/ !]C=5~BBI
private void insertSort(int[] data, int start, int len) { "ph<V,lg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); .K`EflN
} wCgi@\
} {'a|$u+
} {$QkerW3
} ~-f"&@){,
-*[:3%
堆排序： _lMSW6
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package org.rut.util.algorithm.support; M2!2J
i`^[_
import org.rut.util.algorithm.SortUtil; YR-Ge
*!MMl]gU?
/** ?np3*;lw
* @author treeroot 0vZ49}mb)
* @since 2006-2-2 SLU$DW;t
* @version 1.0 CK9FAuU
*/ G\(cnqHk
public class HeapSort implements SortUtil.Sort{ W9!K~g_
^m['VK#?
/* (non-Javadoc) p(6KJK\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D"M[}$P
*/ N|e#&
public void sort(int[] data) { ?/q\S
MaxHeap h=new MaxHeap(); 4o|<zn
h.init(data); UvF5u(o
for(int i=0;i h.remove(); <Uc?#;%Y}
System.arraycopy(h.queue,1,data,0,data.length); fM`.v+
} P09f
2rxz<ck(
private static class MaxHeap{ &4{!5r
~@$RX:p
void init(int[] data){ 3IG<Ot9
this.queue=new int[data.length+1]; "A]#KTP
for(int i=0;i queue[++size]=data; #QNa| f#=
fixUp(size); y.$Ae1a=
} mtmTlGp6Lc
} Z(I=KBI
4'5|YGQj
private int size=0; ha?M[Vyw4Q
dJ{q}U
private int[] queue; iAo/Dnp2J
5x"eM=
public int get() { \}71pzw(
return queue[1]; 3X%h?DC
} uN4e n,
]d~2WX Y
public void remove() { 89x;~D1
SortUtil.swap(queue,1,size--); ?$#P =VK
fixDown(1); UM<!bNz`
} 8j)*T9
file://fixdown _<KUa\
private void fixDown(int k) { 8n35lI( [
int j; Kay\;fXT
while ((j = k << 1) <= size) { {fJCj152.
if (j < size %26amp;%26amp; queue[j] j++; d7S?"JpV
if (queue[k]>queue[j]) file://不用交换 &2bqL!k
break; "7Z-ACyF5
SortUtil.swap(queue,j,k); *x:*Q \|
k = j; ?I$-im
} ~REfr}0
} [2PPa9F
private void fixUp(int k) { ;0lY_ii
while (k > 1) { G#fF("Ndu`
int j = k >> 1; jyB Ys& v
if (queue[j]>queue[k]) DTlId~Dyq
break; U$46=F|
SortUtil.swap(queue,j,k); ,KCxNdg^#-
k = j; ey6ujV7!
} Tje(hnN
} -3u ;U,}
<eZ*LK?
} [HI$[:[
U!(es0rX
} _2Mpzv
U C_$5~8p
SortUtil： GvZ[3GT
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package org.rut.util.algorithm; adPd}rt;
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import org.rut.util.algorithm.support.BubbleSort; ( k,?)
import org.rut.util.algorithm.support.HeapSort; hr!'
import org.rut.util.algorithm.support.ImprovedMergeSort; bct8~dY
import org.rut.util.algorithm.support.ImprovedQuickSort; RO@=&3s
import org.rut.util.algorithm.support.InsertSort; hd]ts.
import org.rut.util.algorithm.support.MergeSort; R?IRE91 :
import org.rut.util.algorithm.support.QuickSort; Y?3f Fg
import org.rut.util.algorithm.support.SelectionSort; [+_>g4M~%
import org.rut.util.algorithm.support.ShellSort; &$ud;r#
.TCDv4?
/** pD('6C;
* @author treeroot !hFhw1
* @since 2006-2-2 4xH/a1&p=
* @version 1.0 FA+"t^q
*/ 7]9,J(:Ed
public class SortUtil { c8T| o=`k6
public final static int INSERT = 1; }[R-)M
public final static int BUBBLE = 2; 0U~*uDU
public final static int SELECTION = 3; H'JU5nE
public final static int SHELL = 4; PW82 Vp.
public final static int QUICK = 5; dyk(/#*7W
public final static int IMPROVED_QUICK = 6; )N*Jc @Y@
public final static int MERGE = 7; Mo5b @ [
public final static int IMPROVED_MERGE = 8; }m'n1tm;
public final static int HEAP = 9; f!{@{\
Ch\__t*v!
public static void sort(int[] data) { ":f]egq -
sort(data, IMPROVED_QUICK); S+#|j
} |#sOa
private static String[] name={ (k8}9[3G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]T'7+5w
}; T2 S fBs
VFzIBgJ3
private static Sort[] impl=new Sort[]{ I]DD5l}\
new InsertSort(), L^r & .N\
new BubbleSort(), 2v2XU\u{t
new SelectionSort(), tt#dO@G#Fe
new ShellSort(), 6oKdw|(Q#
new QuickSort(), 'uE;8.,
new ImprovedQuickSort(), .T)wG;+
new MergeSort(), TkJ[N4'0
new ImprovedMergeSort(), #f<v%
new HeapSort() aHVzBcCPh
}; #y[U2s Se
TDUY&1[
public static String toString(int algorithm){ #qh ,
return name[algorithm-1]; \H~zN]3^
} vP=68muD
O=;jDWE
public static void sort(int[] data, int algorithm) { ~USt&?
impl[algorithm-1].sort(data); fvcS=nRQv
} ?^M,Mt
*yaS^k\
public static interface Sort { 0y6M;"&~E
public void sort(int[] data); _CfJKp)
} g`%in
cPD_=.&
public static void swap(int[] data, int i, int j) { &w#!
int temp = data; j:xC\b47"
data = data[j]; 6pSi-FH
data[j] = temp; N0.|Mb"?t
} 4l+!Z,b
} R(`:~@3\6