[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; 1#x5 o2n
} C[,h!
int i1=l; +1wEoU.l2
int i2=mid+1; 0cG[<\qT
for(int cur=l;cur<=r;cur++){ n=-vOa%
if(i1==mid+1) (LK@w9)i;
data[cur]=temp[i2++]; !U?C_
else if(i2>r) X.#*+k3s0
data[cur]=temp[i1++]; &Z~_BT
else if(temp[i1] data[cur]=temp[i1++]; %/3+:}@G
else 4vL\t uoz
data[cur]=temp[i2++]; O + aK#eF
} qVh?%c1.Y
} MX]#|hEeQ
"=Z=SJ1D
} |WaWmp(pQ
<*J"6x
改进后的归并排序: @rT$}O1?`
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package org.rut.util.algorithm.support; `mcb0
[,Ul
import org.rut.util.algorithm.SortUtil; Z><+4 '
)$p36dWl
/** #fF5O2E'3
* @author treeroot ?xwi2<zz
* @since 2006-2-2 y"H5>
* @version 1.0 |\Gkhi>;
*/ N$>Ml!J
public class ImprovedMergeSort implements SortUtil.Sort { j?C[ids<
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private static final int THRESHOLD = 10; P6%qNR/ x
$|7"9W}m*
/* C)m@/w
* (non-Javadoc) tfHr'Qy BC
* nrE.0Ue1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b6S"&hs
*/ @8c@H#H
public void sort(int[] data) { iJh{,0))g
int[] temp=new int[data.length]; rWWpP<
mergeSort(data,temp,0,data.length-1); "zw{m+7f,
} ]iTP5~8U
\#biwX
private void mergeSort(int[] data, int[] temp, int l, int r) { 8cfsl lI
int i, j, k; n=b!c@f4
int mid = (l + r) / 2; $~q{MX&J
if (l == r) V #vkj
return; /QS Nv
if ((mid - l) >= THRESHOLD) <,O|fY%
mergeSort(data, temp, l, mid); yUcU-pQ
else 4%}iKoT
insertSort(data, l, mid - l + 1); G-D}J2r=F
if ((r - mid) > THRESHOLD) MX*4d{l
mergeSort(data, temp, mid + 1, r); [|$C2Dhw=
else DPY+{5q2
insertSort(data, mid + 1, r - mid); r!w4Br0
PM@_ZJ'x
for (i = l; i <= mid; i++) { lrPIXIM
temp = data; @[FO;4w
} iaMl>ua
for (j = 1; j <= r - mid; j++) { t(UBs-t
temp[r - j + 1] = data[j + mid]; z*VK{O)o
} 6GAEQ]
int a = temp[l]; Y, Lpv|
int b = temp[r]; WTD86A
for (i = l, j = r, k = l; k <= r; k++) { .`KzA]&#
if (a < b) { \|vo@E
data[k] = temp[i++]; p}~Sgi
a = temp; ymrnu-p o
} else { ,4,Bc<
data[k] = temp[j--]; 2 .Xx)(>
b = temp[j]; ;|\j][A
} nIOSP:'>
} ~W"@[*6w
} `<@ "WSn
L5:1dF
/** nCV7(ldmH
* @param data GS>YfJ&DZ
* @param l .5SYN-@
* @param i @(6P L^I
*/ iqoMQ7%
private void insertSort(int[] data, int start, int len) { tw 3zw`o:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); owa&HW/_
} sOz {spA
} >BJBM |
} 3 q8S
} \u6.*w5TI
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堆排序： SPe%9J+
cAx$W6S
package org.rut.util.algorithm.support; ,ZYPffu<*
}]1C=~lC
import org.rut.util.algorithm.SortUtil; `)8SIx
{Gh9(0,B?
/** CE (zt
* @author treeroot $<VH~Q<
* @since 2006-2-2 _`*G71PS
* @version 1.0 //3fgoly
*/ ifWQwS/,a
public class HeapSort implements SortUtil.Sort{ "J&WH~8+N
TrgKl2xfx
/* (non-Javadoc) m1K4_a)^[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z6So5r%wZ
*/ /&qE,>hd.+
public void sort(int[] data) { YHgNL LZ?
MaxHeap h=new MaxHeap(); o*~=NoR
h.init(data); O<AGAD
for(int i=0;i h.remove(); <v\$r2C*
System.arraycopy(h.queue,1,data,0,data.length); Jz0AYiCq
} :v45Ls4J
%b h:c5
private static class MaxHeap{ S6JWsi4C:,
]:n9MFv
void init(int[] data){ );S8`V
this.queue=new int[data.length+1]; b"Nd8f[
for(int i=0;i queue[++size]=data; Om;`"5
fixUp(size); W}k/>V_
} hVz]',
} )2^r 0(x
[k%u$
private int size=0; $E8}||d
C%%gCPI^y
private int[] queue; 2/F8kVx{
'"hSX=
public int get() { ;i [;%
return queue[1]; oFzmH!&ED
} Fo0s<YlS-
SgN?[r)
public void remove() { vXM{)
SortUtil.swap(queue,1,size--); 39pA:3iTd
fixDown(1); EKuLt*a/
} sw:a(o&$
file://fixdown m.gv?
private void fixDown(int k) { ;Ob^@OM
int j; ]W`M <hEI
while ((j = k << 1) <= size) { 8F$]@0v`%
if (j < size %26amp;%26amp; queue[j] j++; }QCn>LXE
if (queue[k]>queue[j]) file://不用交换 s`yg?CR`,
break; mYk~ ]a-
SortUtil.swap(queue,j,k); y\9#"=+
k = j; E KJ2P$
} hoiC J}us
} Hkf]=kPy*
private void fixUp(int k) { zlkW-rRkR
while (k > 1) { E8lq2r=
int j = k >> 1; F[B=sI
if (queue[j]>queue[k]) p9MJa[}V
break; '!MKZKer
SortUtil.swap(queue,j,k); s gZlk9x!Q
k = j; 6!Mm")
} qd'Z|'j
} soLmr's
VHLNJnA
} Hh&qjf
Osy_C<O
} JPZH%#E(
# xX
SortUtil： @'Pay)P
CLuQ=-[|
package org.rut.util.algorithm; #B!M,TWf9s
k2#|^N
import org.rut.util.algorithm.support.BubbleSort; wT,=C'
import org.rut.util.algorithm.support.HeapSort; (7$BF~s:,
import org.rut.util.algorithm.support.ImprovedMergeSort; Nn?$}g
import org.rut.util.algorithm.support.ImprovedQuickSort; [{>1wJ Pdj
import org.rut.util.algorithm.support.InsertSort; Bq-}BN?pz
import org.rut.util.algorithm.support.MergeSort; vr6YE;Rs
import org.rut.util.algorithm.support.QuickSort; /z}b1m+
import org.rut.util.algorithm.support.SelectionSort; @W,<8
import org.rut.util.algorithm.support.ShellSort; /*"pylm
4l>d^L
/** \lwLVe
* @author treeroot $:A80(#+
* @since 2006-2-2 }YM[aq?6
* @version 1.0 m G+=0Rn^
*/ CZ{7?:^f
public class SortUtil { ^/}&z
public final static int INSERT = 1; *.T?#H
public final static int BUBBLE = 2; )tS;gn
public final static int SELECTION = 3; R`Hy0;X
public final static int SHELL = 4; <33,0."K
public final static int QUICK = 5; 8WKY 4nkj
public final static int IMPROVED_QUICK = 6; ^HE@ [b
public final static int MERGE = 7; aej'cbO
public final static int IMPROVED_MERGE = 8; wL>;_KdU`
public final static int HEAP = 9; <qI!Dj{
b9v<Jk
public static void sort(int[] data) { x2OAkkH\]i
sort(data, IMPROVED_QUICK); /?S^#q>m%
} xm=$D6O:
private static String[] name={ & Yx12B\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }iUpBn
}; _lm^v%J$
Zdfh*MHMg
private static Sort[] impl=new Sort[]{ B;piO-hH
new InsertSort(), =NNxe"Kd;U
new BubbleSort(), 3kwkU
new SelectionSort(), W|s";EAM
new ShellSort(), M7&G9SGZ
new QuickSort(), i;29*"
new ImprovedQuickSort(), hR.vJ2oa
new MergeSort(), 5/CF_v
new ImprovedMergeSort(), &$l#0?Kc^
new HeapSort() @Q;s[Kg{!
}; mwI7[I2q
uaky2SgN
public static String toString(int algorithm){ dI!/H&`B]
return name[algorithm-1]; >Ml5QO$*.q
} *{\))Zmhd
(<e<Q~(
public static void sort(int[] data, int algorithm) { MY}K.^4^
impl[algorithm-1].sort(data); jCIY(/
} [r'A8!/|[
ki1j~q
public static interface Sort { Cbm^: _LR
public void sort(int[] data); aEVy20wd
} } .<(L
Ji6.-[:
public static void swap(int[] data, int i, int j) { Zp9kxm'
int temp = data; >6)|>#Wi
data = data[j]; lJT"aXt'M
data[j] = temp; 7;&,LH
} Sn' +~6i
} L1y71+iqU