[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; 8Q<Nl=g>'
} N|2d9E
int i1=l; Q<;EQb#
int i2=mid+1; I]+ zG
for(int cur=l;cur<=r;cur++){ gT$WG$^i
if(i1==mid+1) K{/i2^4
data[cur]=temp[i2++]; qK#"uU8B
else if(i2>r) knG:6tQ
data[cur]=temp[i1++]; $hcv}<$/
else if(temp[i1] data[cur]=temp[i1++]; i7r)9^y
else aY(s &
data[cur]=temp[i2++]; <Z3C&BM
} )D6i {I0
} ^\Q,ACkZb
"N=$=Dy>
} YtSYe%
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改进后的归并排序: l9=Ka{$^*
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package org.rut.util.algorithm.support; tugIOA
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import org.rut.util.algorithm.SortUtil; qp6'n&^&
H,w8+vZ4\
/** @YH>|{S&
* @author treeroot 1R~$m
* @since 2006-2-2 @#t<!-8d
* @version 1.0 U!o
*/ 6:B,ir _
public class ImprovedMergeSort implements SortUtil.Sort { T5ky:{Y(
[|eIax xR,
private static final int THRESHOLD = 10; JcmMbd&B
!J#P'x0
/* S$fS|N3]%
* (non-Javadoc) D3dh,&KO\
* Lv/}&'\(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /N*<Fq7w~
*/ RxJbQs$Ph
public void sort(int[] data) { db_?da;!`
int[] temp=new int[data.length]; hN=kU9@knC
mergeSort(data,temp,0,data.length-1); exiu;\+j
} ]f&]E ~i
uIO,9> ee
private void mergeSort(int[] data, int[] temp, int l, int r) { lrKT?siB
int i, j, k; 9M9Fif.
int mid = (l + r) / 2; Ji!i}UjD7!
if (l == r) `V V>AA5
return; O*?^a7Z)4
if ((mid - l) >= THRESHOLD) TK' 5NM+4
mergeSort(data, temp, l, mid); yQj J-g(.
else We}9'X}
insertSort(data, l, mid - l + 1); sB*dv06b0
if ((r - mid) > THRESHOLD) H'YKj'
mergeSort(data, temp, mid + 1, r); #BBDI
else > _sSni
insertSort(data, mid + 1, r - mid); diM*jN#
,.*Df)+
for (i = l; i <= mid; i++) { '\8YH+%It
temp = data; ]O:8o<0
} &XCd2
for (j = 1; j <= r - mid; j++) { cW0\f5[/
temp[r - j + 1] = data[j + mid]; 2Q@na@s
} ,D`jlY-1l
int a = temp[l]; 9x4z m
int b = temp[r]; M61Nl)|mx&
for (i = l, j = r, k = l; k <= r; k++) { }\8-&VoY#X
if (a < b) { ~gZ1*8s`
data[k] = temp[i++]; |?0MRX0'g
a = temp; WQVU 82b*
} else { (_}q>3
data[k] = temp[j--]; !+@70|gFF
b = temp[j]; ?F[_5ls|]
} <`vXyPA6
} dT7fyn
} ]Ri=*KZa
MhE".ZRd
/** v ))`U,Gm
* @param data H*<E5^#dw
* @param l Y+23 jlgb
* @param i :/][ n9J^
*/ X}3?k<m
private void insertSort(int[] data, int start, int len) { 4pXY7+e2'
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s1Wn.OGR4
} KV;q}EyG
} ip'{@1L
} 4NaT@68p
} N6_1iIM
5 8;OTDR!
堆排序： "\;n t5L
*< fJgc"3
package org.rut.util.algorithm.support; CHqi5Z/+
zpf<!x^
import org.rut.util.algorithm.SortUtil; lAA6tlc#C
pl,XS6mB
/** p%bMfi*T
* @author treeroot 9&^5!R8
* @since 2006-2-2 67T.qX2I$
* @version 1.0 a $'U?%
*/ RJDk7{(
public class HeapSort implements SortUtil.Sort{ 0VJHE~Bgi
"Zn nb*pOM
/* (non-Javadoc) U5cbO{\3I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'cS| BT
*/ M{)eA<6
public void sort(int[] data) { j<Pw0?~s6
MaxHeap h=new MaxHeap(); .@;5"
h.init(data); Bo ywgL|
for(int i=0;i h.remove(); $1s>efP-
System.arraycopy(h.queue,1,data,0,data.length); +Gy9K
} ft{i6}
"BpDlTYM
private static class MaxHeap{ ^P [#YO
9'|k@i:
void init(int[] data){ n?q+:P
this.queue=new int[data.length+1]; A -8]4p::
for(int i=0;i queue[++size]=data; :D2GLq*\
fixUp(size); %O[1yZh \
} "[z/\l8O
} n2c(x\DA&
3_ E}XQd
private int size=0; 1v3
wLO"[,
private int[] queue; 0$yHO2 f
$OGMw+$C^
public int get() { hlc g[Qdo*
return queue[1]; ?6N\AM'
} u0[O /G
v{1g`E
public void remove() { kwS[,Qy\
SortUtil.swap(queue,1,size--); XWz~*@ci
fixDown(1); R*ex!u60M
} ecvZwL
file://fixdown -biw{
private void fixDown(int k) { l9y%@7
int j; L5&,sJz
while ((j = k << 1) <= size) { O7&OCo|b%>
if (j < size %26amp;%26amp; queue[j] j++; %.uN|o&n
if (queue[k]>queue[j]) file://不用交换 kY4h-oZ
break; !HXsxNe
SortUtil.swap(queue,j,k); n|QA\,=
k = j; `q\v~FT
} &Dp&
} NY[48H
private void fixUp(int k) { B(-F|q\
while (k > 1) { ^:O*Sx.CA
int j = k >> 1; 9/#b1NGv
if (queue[j]>queue[k]) lKRp9isn^
break; fv>Jn`
SortUtil.swap(queue,j,k); aH500
k = j; A>:31C
} D2:ShyYAS
} &Fmen;(
lrMkp@f.
} !) d
1_n5:
} ,zBc-Cm
ZU9RvtbKB
SortUtil： Y$3liDeL=
L#_QrR6Sny
package org.rut.util.algorithm; :3}K$
Q6[h;lzGV
import org.rut.util.algorithm.support.BubbleSort; MF::At[4
import org.rut.util.algorithm.support.HeapSort; <S@2%%W
import org.rut.util.algorithm.support.ImprovedMergeSort; ` -<S13
import org.rut.util.algorithm.support.ImprovedQuickSort; x1#6~283
import org.rut.util.algorithm.support.InsertSort; &v r0{]V^
import org.rut.util.algorithm.support.MergeSort; ljh,%#95=
import org.rut.util.algorithm.support.QuickSort; :\1vy5 _
import org.rut.util.algorithm.support.SelectionSort; mx^rw*'JGC
import org.rut.util.algorithm.support.ShellSort; YE@!`!`d:
\FyHIs
/** E{}eYU
* @author treeroot .ityudT<
* @since 2006-2-2 @hOY&
* @version 1.0 =Ajw(I[56
*/ 16N`xw+{
public class SortUtil { .lppT)P
public final static int INSERT = 1; )|S!k\^A
public final static int BUBBLE = 2; (Z>vbi%
public final static int SELECTION = 3; qI\B;&hr(
public final static int SHELL = 4; ?eR^\-e
public final static int QUICK = 5; MCfDR#a
public final static int IMPROVED_QUICK = 6; ?)+I'lW!
public final static int MERGE = 7; IAbH_+7O
public final static int IMPROVED_MERGE = 8; <ZeZq
public final static int HEAP = 9; 2wZyUB;
}9&~+Q2
public static void sort(int[] data) { Cx`?}A\%
sort(data, IMPROVED_QUICK); rEZMX2
} x$V[xX
private static String[] name={ :B4X/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" If.hA}
}; S 5nri(m
-M?s<R[&
private static Sort[] impl=new Sort[]{ }Xy<F?Mh
new InsertSort(), &#[6a&9#[A
new BubbleSort(), ~FZ=
new SelectionSort(), H52] Zm
new ShellSort(), sZ7BBJX2K
new QuickSort(), \Ot,&Z k2
new ImprovedQuickSort(), I=yy I
new MergeSort(), [,p[%Dza
new ImprovedMergeSort(), Z6r_T
new HeapSort() p\/;^c`7
}; Zo36jSrCL
\!:^=2VF
public static String toString(int algorithm){ UPJ3YpK
return name[algorithm-1]; x AR9* <-
} ]W 6!Xw)[
#+Cu&l
public static void sort(int[] data, int algorithm) { m]:|j[!*M
impl[algorithm-1].sort(data); wloQk(T<W
} ?i7}d@636
f\gN+4)
public static interface Sort { 2p|[yZ
public void sort(int[] data); '}NQ`\k
} }zu?SZH
P_ x9:3
public static void swap(int[] data, int i, int j) { 3]}wZY0
int temp = data; 0SLS;s.GX
data = data[j]; =7uxzg/%Tj
data[j] = temp; o72G oUfs
} 7nAB^~)6l
} |/-H:\5