[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; DOT=U _
} 6ZTaQPtm
int i1=l; Zr9d&|$
int i2=mid+1; W1<.OO\J
for(int cur=l;cur<=r;cur++){ ?to1rFrU
if(i1==mid+1) (qj,GmcS
data[cur]=temp[i2++]; 9[,s4sxH
else if(i2>r) l-MxLcz
data[cur]=temp[i1++]; 86#-q7aX
else if(temp[i1] data[cur]=temp[i1++]; T(&kXMaB
else Y@ObwKcG
data[cur]=temp[i2++]; SLg+H
} e|~C?Ow'J
} QK'`=MU
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} ?Oqzd$-
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改进后的归并排序: pIvfmIm
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package org.rut.util.algorithm.support; 8T<@ @6`T
#_{0Ndp2
import org.rut.util.algorithm.SortUtil; tw-fAMwU
yT&x`3f"i
/** =9fEv,Jk
* @author treeroot SF"#\{cjj
* @since 2006-2-2 CQ$::;
* @version 1.0 /M]eZ~QKD
*/ sK`<kbj
public class ImprovedMergeSort implements SortUtil.Sort { >eRZ+|k?N
"0b?+ 3_{G
private static final int THRESHOLD = 10; e& p_f<
@~s~/[
/* KjBOjD'I
* (non-Javadoc) jp%+n
* wLpkUa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }$<^wt
*/ v7L"`
public void sort(int[] data) { rNZO.qijz
int[] temp=new int[data.length]; #n=A)#'my
mergeSort(data,temp,0,data.length-1); [f=.!\0\
} {v,{x1
' *}^@[&
private void mergeSort(int[] data, int[] temp, int l, int r) { M5F(<,n;
int i, j, k; gA{'Q\
int mid = (l + r) / 2; }'DC Q
if (l == r) C`3V=BB
return; LSSW.Oz2L
if ((mid - l) >= THRESHOLD) W"dU1]
mergeSort(data, temp, l, mid); 6zv;lx0<D&
else amMjuyW
insertSort(data, l, mid - l + 1); =l_rAj~I|
if ((r - mid) > THRESHOLD) Zd8drT'@#
mergeSort(data, temp, mid + 1, r); -%>8.#~G
else sr;:Dvx~
insertSort(data, mid + 1, r - mid); Y~:}l9Qs
B;SzuCW
for (i = l; i <= mid; i++) { 3mk=ZWwv
temp = data; Ap%d<\,Z
} 7Pwg+|
for (j = 1; j <= r - mid; j++) { qw|JJ
temp[r - j + 1] = data[j + mid]; o>@=N2n
} sZ]'DH&_(
int a = temp[l]; )@!~8<_"
int b = temp[r]; HOq4i!
for (i = l, j = r, k = l; k <= r; k++) { 5/tj
if (a < b) { /731.l
data[k] = temp[i++]; l6V%"Lo/)
a = temp; IhUW=1&J
} else { ,GP!fsK
data[k] = temp[j--]; L'13BRu`
b = temp[j]; &S<?07Z
} x)j/
} SOhSg]g
} c[&d @
V_Xy2<V
/** oDz*~{BHg
* @param data o>0O@NE
* @param l 1$);V,DK!
* @param i c/b%T
*/ ('T4Db
private void insertSort(int[] data, int start, int len) { EbG_43SV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m{vT_ei
} a_Z.J3
} ri"?,}(
} -T2~W!
} ]vRVo6@ k
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堆排序： giaD9$C
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package org.rut.util.algorithm.support; ylkpYd
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import org.rut.util.algorithm.SortUtil; RlU;v2Kch
B{;11u
/** mgo'MW\
* @author treeroot 2IKxh
* @since 2006-2-2 ]#vWKNv:;
* @version 1.0 Q.rB\8ea
*/ tceIA8d6
public class HeapSort implements SortUtil.Sort{ FTbT9
;:AG2zE!
/* (non-Javadoc) / c+,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N{ : [/
*/ #:]vUQ
public void sort(int[] data) { yQ<6p3
MaxHeap h=new MaxHeap(); _2]e1_=
h.init(data); F<h&3
for(int i=0;i h.remove(); $eK8GMxZ#
System.arraycopy(h.queue,1,data,0,data.length); J f\Qf
} <+<)xwOQ ]
lO551Y^
private static class MaxHeap{ T {hyt
,@}W@GGP)
void init(int[] data){ :5r:I[FFy
this.queue=new int[data.length+1]; -;l`hRW
for(int i=0;i queue[++size]=data; M7`UoTc+>d
fixUp(size); CbnR<W-j
} bs:C1j\&
} hCU)W1q#
&W&7bZ$;
private int size=0; +`Q PBj^
CHQ{+?#
private int[] queue; |hu"5*
2v"wWap-+
public int get() { (nkUeQQN
return queue[1]; _pY
} +#|'|}j
;6DR.2}?>
public void remove() { EZ:I$X
SortUtil.swap(queue,1,size--); 5Z^$`$/.v#
fixDown(1); N5:D8oWWXR
} A>qd2
file://fixdown ^?H\*N4
private void fixDown(int k) { ?whRlh
int j; 7yY1dR<Y
while ((j = k << 1) <= size) { ({*.!ty
if (j < size %26amp;%26amp; queue[j] j++; vS~AxeW/7R
if (queue[k]>queue[j]) file://不用交换 F7k4C2r
break; C\;;9
SortUtil.swap(queue,j,k); P Xyyyir{
k = j; (1j(* ?2
} @/_XS4
} hXV4$Dai
private void fixUp(int k) { /V#MLPA
while (k > 1) { 5A0KV7N5
int j = k >> 1; nG&w0de<>
if (queue[j]>queue[k]) T+&x{+gZ
break; Jm{As*W>
SortUtil.swap(queue,j,k); I T*fjUY&
k = j; N&R '$w
} U92B+up-
} 27h/6i3
t9KH|y
} Up]VU9z
5*G8W\ $
} Y;a6:>D%cT
pHI%jHHJ
SortUtil： f)&`mqeE
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package org.rut.util.algorithm; `~w%Jf
+^^S'mP8
import org.rut.util.algorithm.support.BubbleSort; K1m!S9d`x
import org.rut.util.algorithm.support.HeapSort; ]pM5?^<~
import org.rut.util.algorithm.support.ImprovedMergeSort; "k>{b:R|
import org.rut.util.algorithm.support.ImprovedQuickSort; b?+Yo>yF8
import org.rut.util.algorithm.support.InsertSort; w]]x[D]L
import org.rut.util.algorithm.support.MergeSort; sqq/b9 uL/
import org.rut.util.algorithm.support.QuickSort; &(z8GYBr
import org.rut.util.algorithm.support.SelectionSort; x9XGCr
import org.rut.util.algorithm.support.ShellSort; uAPLT~
j8D$/
/** @F""wKnV
* @author treeroot puf;"c6e'
* @since 2006-2-2 )_x8?:lv
* @version 1.0 Nlf&]^4(0
*/ ql%]$`IV6
public class SortUtil { h=p-0 Mx .
public final static int INSERT = 1; ^)eessZ
public final static int BUBBLE = 2; N7j]yvE
public final static int SELECTION = 3; 7|{%CckN
public final static int SHELL = 4; ByB0>G''.
public final static int QUICK = 5; mCEKEX
public final static int IMPROVED_QUICK = 6; 8KtF<`A)
public final static int MERGE = 7; I&Eg-96@
public final static int IMPROVED_MERGE = 8; W#JVUGYD
public final static int HEAP = 9; '|dKg"Yl
&9jUf:gJ0
public static void sort(int[] data) { 37ri b
sort(data, IMPROVED_QUICK); 8V53+]c$Y
} skmDsZzw
private static String[] name={ P /f ~
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h!JjN$
}; E|8s2t
I'6ed`|
private static Sort[] impl=new Sort[]{ \nWzn4f
new InsertSort(), hg86#jq%
new BubbleSort(), |Ls&~'ik
new SelectionSort(), 8WLh]MD`
new ShellSort(), ^<5^9]x
new QuickSort(), '3Lx!pMhN
new ImprovedQuickSort(), %n V@'3EI
new MergeSort(), r*
new ImprovedMergeSort(), sDh6 Uk
new HeapSort() v J,xz*rc`
}; J&] XLr.j
['9OGV\
public static String toString(int algorithm){ ZRVF{D??"%
return name[algorithm-1]; -*]9Ma<wa
} >Y*iy
!O%f)v?
public static void sort(int[] data, int algorithm) { P[J qJi/H
impl[algorithm-1].sort(data); +wf&L
} lw/ m0}it
4*ty&s=5OJ
public static interface Sort { < 8W:ij.`
public void sort(int[] data); .Q6{$Y%l
} =f{Z~`3
\-`oFe"
public static void swap(int[] data, int i, int j) { !gA^$(=:"
int temp = data; tg m{gR
data = data[j]; b}q(YgH<
data[j] = temp; brhJ&|QDE
} hzf}_1
} COl%P