[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; .p*D[o2 9
} -3%)nV
int i1=l; <|.! Px86
int i2=mid+1; +jZg%$Q!#
for(int cur=l;cur<=r;cur++){ N#!1@!2BN
if(i1==mid+1) 7Mg7B
data[cur]=temp[i2++]; KGLhl;a
else if(i2>r) GyM%vGl 3
data[cur]=temp[i1++]; L<>NL$CrN
else if(temp[i1] data[cur]=temp[i1++]; NHVx!Kc
else ]Sx=y<
data[cur]=temp[i2++]; |DS@90}
} F?AfB[PM
} p:>?
+=04X F:
} ITY!=>S-
Hh=::Bi
改进后的归并排序: 4O"kOEkKT>
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package org.rut.util.algorithm.support; Z/UVKJm>:
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import org.rut.util.algorithm.SortUtil; ){|Lh(
UNLNY,P/!)
/** N}<U[nh'
* @author treeroot .wOLi Ms
* @since 2006-2-2 JkDZl?x5
* @version 1.0 Wk#-LkI
*/ tSLl'XeN
public class ImprovedMergeSort implements SortUtil.Sort { ~vZzKRVS
u,9U0ua@;
private static final int THRESHOLD = 10; v7u}nx
hg/&[/eodm
/* e>9{36~jh
* (non-Javadoc) 3Ty{8oUs^
* -#M~NbI,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NGZ>:
*/ "/h"Xg>q
public void sort(int[] data) { 1gK3=Ys
int[] temp=new int[data.length]; !fjU?_[S
mergeSort(data,temp,0,data.length-1); MQMy Z:
} h#;K9#x6
#;\;F PuZ
private void mergeSort(int[] data, int[] temp, int l, int r) { `%I{l
int i, j, k; ##ea-"m8
int mid = (l + r) / 2; t|"d#5'
if (l == r) ;9\0x
return; mzR @P$:36
if ((mid - l) >= THRESHOLD) !+ hgKZ]
mergeSort(data, temp, l, mid); vXZz=E AH
else Z"KuS
insertSort(data, l, mid - l + 1); MpvA--
if ((r - mid) > THRESHOLD) U4pvQE.m<
mergeSort(data, temp, mid + 1, r); < l ^ Z;.
else lq9h Dn[p
insertSort(data, mid + 1, r - mid); }H^^v[4
^K[tO54
for (i = l; i <= mid; i++) { q)i(wEdUZ
temp = data; y9 '3vZ
} +~]g&Mf6o
for (j = 1; j <= r - mid; j++) { )yAPYC
temp[r - j + 1] = data[j + mid]; zXPj7K*
} w'>v@`y
int a = temp[l]; 5E(P,!-.
int b = temp[r]; n\DT0E]
for (i = l, j = r, k = l; k <= r; k++) { 1k({(\>qq
if (a < b) { lY?d*qED
data[k] = temp[i++]; 5-po>1g'
a = temp; a{.n(M
} else { G\AQql(f4
data[k] = temp[j--]; a-5$GvG
b = temp[j]; Db:WAjU
} dPX>A4wp
} 9xp ;$14
} O:R{4Q*5
$QnfpM%+=
/** 0P >dXd)T
* @param data yln.E vJjD
* @param l g5\B-3{
* @param i \H12~=p`B
*/ en":
private void insertSort(int[] data, int start, int len) { Lj,%pzJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @SB+u+mOS
} r\`m[Q
} s``L?9
} oI/ThM`=q
} LvdMx]*SSr
@h3)!#\N
堆排序： 'm:B(N@+
|sAg@kM
package org.rut.util.algorithm.support; !d_A?q'hN
PdnK@a
import org.rut.util.algorithm.SortUtil; 8~>3&jX
DR=1';63
/** @ U|u _S@
* @author treeroot PS1~6f"D
* @since 2006-2-2 Yw `VL)v(y
* @version 1.0 $sJfxh r
*/ z<*]h^!3
public class HeapSort implements SortUtil.Sort{ 'M/&bu r
>fQN"(tf
/* (non-Javadoc) fXj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {}e IpK,+
*/ AG2jl/
public void sort(int[] data) { c5pG?jr+d
MaxHeap h=new MaxHeap(); w:v:znQrW
h.init(data); x N)Ck76
for(int i=0;i h.remove(); Op~+yMef
System.arraycopy(h.queue,1,data,0,data.length); (1vS)v $L
} #\QC%"%f
voEc'JET
private static class MaxHeap{ _>I5Ud8(-
]Hq%Q~cE
void init(int[] data){ ".IhV<R
this.queue=new int[data.length+1]; .}s a2-
for(int i=0;i queue[++size]=data; WH*&MIjAr/
fixUp(size); 4Rq"xYGXh
} Z0KA4O$eL
} ;<H2N0qJ(
/.bwwj_;
private int size=0; J$[Vm%56
Sa5y7
private int[] queue; s5e}X:
i9tM]/SP
public int get() { L zC~>Uj
return queue[1]; O*7 pg
} f0+
DK;-2K
public void remove() { g=8e.Y*Fr
SortUtil.swap(queue,1,size--); ?Fu.,srt
fixDown(1); 5N0H^
} 3&f{lsLAC
file://fixdown 8pk">"#s
private void fixDown(int k) { ;p8xL)mUP
int j; .rHO7c,P~
while ((j = k << 1) <= size) { >{Djx
if (j < size %26amp;%26amp; queue[j] j++; >E3OYa?G
if (queue[k]>queue[j]) file://不用交换 *6DKUCA/
break; J%'|IwA
SortUtil.swap(queue,j,k); t[Q\T0E
k = j; wW~2]*n
} PoZBiw@
} fsoS!6h0k
private void fixUp(int k) { SbY i|V,H
while (k > 1) { ;7}*Xr|
int j = k >> 1; l]gfT&
if (queue[j]>queue[k]) sXA=KD8
break; /DCUwg=0
SortUtil.swap(queue,j,k); ::6@mFLR
k = j; NG ~sE&,7
} XOMWqQr|
} lx SGvvP4
cqDnZ`|6
} q=U=Y n
hE${eJQ| U
} fqxMTTg@
ryPzq}#
SortUtil： p{Uro!J,K
S3w? X
package org.rut.util.algorithm; lUmaNZ
a9%# J^!
import org.rut.util.algorithm.support.BubbleSort; !WNr09`
import org.rut.util.algorithm.support.HeapSort; Zr3KzY9
import org.rut.util.algorithm.support.ImprovedMergeSort; zKv}J
import org.rut.util.algorithm.support.ImprovedQuickSort; }/|1"D
import org.rut.util.algorithm.support.InsertSort; rnUe/HjH
import org.rut.util.algorithm.support.MergeSort; t V</x0#
import org.rut.util.algorithm.support.QuickSort; }I"^WCyH
import org.rut.util.algorithm.support.SelectionSort; (Q&Z/Fe
import org.rut.util.algorithm.support.ShellSort; LvS`
xQ4Q'9
/** }/=_
* @author treeroot Yyf8B
* @since 2006-2-2 [LE_lATjU
* @version 1.0 3$_wAt4w
*/ {>#Ya;E
public class SortUtil { *:iFhKFU
public final static int INSERT = 1; JdE=!~\8
public final static int BUBBLE = 2; R/=yS7@{)
public final static int SELECTION = 3; h1xYQF_`Z
public final static int SHELL = 4; N]3XDd|q
public final static int QUICK = 5; d}1R<Q;F
public final static int IMPROVED_QUICK = 6; tG'c79D\
public final static int MERGE = 7; !U@[lBW
public final static int IMPROVED_MERGE = 8; K=V)"v5o3
public final static int HEAP = 9; x(A.^Yz
GKX#-zsh79
public static void sort(int[] data) { IIzdCa{l
sort(data, IMPROVED_QUICK); n=`UhC
} EG,RlmcPp
private static String[] name={ +]G;_/[2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?(Nls.c
}; Xh5 z8
&W1c#]q@r
private static Sort[] impl=new Sort[]{ P69S[aqW
new InsertSort(), 7+fFKZFKF
new BubbleSort(), r>Vgo):s
new SelectionSort(), 3/iGSG`
new ShellSort(), U.&=b<f(0r
new QuickSort(), ,Ao8QN
new ImprovedQuickSort(), E8/P D
new MergeSort(), 7C=t19&R'
new ImprovedMergeSort(), )l^w _;
new HeapSort() 1r$q $\
}; W<t,Ivg
DF<_Ns!
public static String toString(int algorithm){ YkTEAI|i
return name[algorithm-1]; _95V"h
} /IODRso/!
^XV$J-
public static void sort(int[] data, int algorithm) { {C [7V{4(%
impl[algorithm-1].sort(data); [!"u&iu`
} CZ|R-ky6p
KdUmetx1
public static interface Sort { vNP,c]:%
public void sort(int[] data); DEIn:d
} #8cY,%<S]
,`K'qms
public static void swap(int[] data, int i, int j) { VK8 5A
int temp = data; e tY9Pq
data = data[j]; WSL_Dc
data[j] = temp; tR1 kn&w
} N]gdS]pP2{
} .pZwhb