[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; !?[oIQ)h
} fB+b}aoV
int i1=l; *wV[TKaN
int i2=mid+1; 0 3~Ikll
for(int cur=l;cur<=r;cur++){ 5v^L9!`@%v
if(i1==mid+1) * \HRw +cL
data[cur]=temp[i2++]; {?{U,&
else if(i2>r) zx1:`K0bi
data[cur]=temp[i1++]; vRPS4@9'
else if(temp[i1] data[cur]=temp[i1++]; }xlKonk
else 9zgNjjCl]
data[cur]=temp[i2++]; ,kgF2K!
} MF[z-7
} Zwe[_z!*D
9YF$CXonE=
} *T4<&
[$ :
改进后的归并排序: B(l-}|m_
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package org.rut.util.algorithm.support; I"xWw/Ec
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import org.rut.util.algorithm.SortUtil; tiLu75vj
T`$KeuL
/** -PAF p3w\y
* @author treeroot M+sj}
* @since 2006-2-2 S*%iiD)
* @version 1.0 Fu8 7fVi/\
*/ H]&!'\aUz
public class ImprovedMergeSort implements SortUtil.Sort { .V%*{eHLL
r3I,11B
private static final int THRESHOLD = 10; Z{{t^+XG
v5T9Y-{`
/* N_C_O$j
* (non-Javadoc) }sMW3'V
* Fc0jQ@4=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^{[`=P'/
*/ >,h1N$A+
public void sort(int[] data) { !=[uT+v
int[] temp=new int[data.length]; ~Sy-gaJ
mergeSort(data,temp,0,data.length-1); p27p~b&
} qtSs)n
da*9(!OV
private void mergeSort(int[] data, int[] temp, int l, int r) { $ u2Cd4
int i, j, k; vmKTF!;
int mid = (l + r) / 2; oA3d^%(c
if (l == r) J0Four#MD
return; 1<uwU(
if ((mid - l) >= THRESHOLD) R!{7OkC
mergeSort(data, temp, l, mid); }(=ml7)v
else QAvWJydb
insertSort(data, l, mid - l + 1); hU,$|_WDy
if ((r - mid) > THRESHOLD) i X/tt
mergeSort(data, temp, mid + 1, r); b~!om
else F7uhuqA]N
insertSort(data, mid + 1, r - mid); ~t9$IB
spiDm:Xe
for (i = l; i <= mid; i++) { f-vK}'Z`,
temp = data; e<'U8|}hc{
} y@9Y,ZR*
for (j = 1; j <= r - mid; j++) { ct\<;I(H
temp[r - j + 1] = data[j + mid]; uAb 03Q
} $i&\\QNn
int a = temp[l]; z1vni'%J
int b = temp[r]; luF#OPC
for (i = l, j = r, k = l; k <= r; k++) { 'aPCb`^;w
if (a < b) { pSrsp r
data[k] = temp[i++]; sUda
a = temp; 9&(.x8d,a
} else { L`[F~$|
data[k] = temp[j--]; x=3I)}J(kn
b = temp[j]; Ge9}8
} SbJh(V-pr
} cX"G7Bh
} [5LMt*Y
tz8t9lb[
/** N('3oy#8
* @param data </hR!Sb]
* @param l >;.*
* @param i wKrdcWI,Z
*/ %((cFQ9
private void insertSort(int[] data, int start, int len) { HtS#_y%(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DzmqR0)
} j~$)c)h"
} `NoCH[$!+
} +ks$UvtY
} " xxXZGUp
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堆排序： OMxxI6h
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package org.rut.util.algorithm.support; L`JY4JM"
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import org.rut.util.algorithm.SortUtil; DMRs}Yz6
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/** 3_@G{O)e
* @author treeroot `O jvt-5}E
* @since 2006-2-2 ]:Wb1
* @version 1.0 2O^32TdS
*/ _]Z$YM
public class HeapSort implements SortUtil.Sort{ @nW'(x(
<|wmjW/D
/* (non-Javadoc) r6<ArX$Yl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 00R%
*/ ],!pp3U
public void sort(int[] data) { @D2`*C9
MaxHeap h=new MaxHeap(); MQhYJ01i
h.init(data); mrX}\p
for(int i=0;i h.remove(); wN$uX#W|
System.arraycopy(h.queue,1,data,0,data.length); M~#5/eRX
} ;9 R40qi
w2s,
private static class MaxHeap{ V}p*HB@:
Pm'.,?"
void init(int[] data){ pZW}^kg=
this.queue=new int[data.length+1]; s;~J2h[
for(int i=0;i queue[++size]=data; N7%=K9
fixUp(size); Es_SCWJ
} %_cg|yy
} >f3k3XWRT
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private int size=0; q|m#IVc
,|=iv
private int[] queue; W"#j7p`d
^2P;CAjj-
public int get() { v#zfs'
return queue[1]; WllCcD1
} a2IV!0x
KX&Od@cQ$
public void remove() { K.c6Rg
SortUtil.swap(queue,1,size--); \L&qfMjW"Z
fixDown(1); rGP? E3
} 4{1c7g
file://fixdown n$A(6]z5O
private void fixDown(int k) { !dYX2!lvT
int j; !^Qb[ev
while ((j = k << 1) <= size) { R;N>#_9HU
if (j < size %26amp;%26amp; queue[j] j++; AF07KA#
if (queue[k]>queue[j]) file://不用交换 C[HE4xF6
break; |ijW_r
SortUtil.swap(queue,j,k); +$Ddd`J'
k = j; ?.|wfBI
} c9/ 'i
} #m[w=Pu}
private void fixUp(int k) { ` Mv5!H5l
while (k > 1) { a93d'ZE-X
int j = k >> 1; -6*OF.Ag`
if (queue[j]>queue[k]) 8*Nt&`@
break; rA&#>R`
SortUtil.swap(queue,j,k); cfQh
k = j; z.\[Va$@l
} G$cq
} EUYa =-
Vtc)/OH
} e`gGzyM
b{ubp
} yQQDGFTb!=
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SortUtil： S{r)/~/
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package org.rut.util.algorithm; _tR.RAaa"
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import org.rut.util.algorithm.support.BubbleSort; %V" +}Dr
import org.rut.util.algorithm.support.HeapSort; =G3J.S*Riy
import org.rut.util.algorithm.support.ImprovedMergeSort; Duo#WtC
import org.rut.util.algorithm.support.ImprovedQuickSort; Rh-8//&vZ/
import org.rut.util.algorithm.support.InsertSort; D;#Yn M3
import org.rut.util.algorithm.support.MergeSort; |SXMu_w
import org.rut.util.algorithm.support.QuickSort; VHY<(4@
import org.rut.util.algorithm.support.SelectionSort; xF:poi
import org.rut.util.algorithm.support.ShellSort; 86) 3XE[5
|jCE9Ve#
/** @8 yE(
* @author treeroot XC8z|A-@
* @since 2006-2-2 1Qc(<gM
* @version 1.0 Vp0GmZ
*/ \~1zAiSd>#
public class SortUtil { 5['B- Iw
public final static int INSERT = 1; Y.hH fSp
public final static int BUBBLE = 2; K+TTYQ
public final static int SELECTION = 3; C?c-V,
public final static int SHELL = 4; '[ddE!ta
public final static int QUICK = 5; bz,cfc;?$
public final static int IMPROVED_QUICK = 6; 7g<`wLAH
public final static int MERGE = 7; Zp(P)Obs#
public final static int IMPROVED_MERGE = 8; jKi*3-&
public final static int HEAP = 9; N?<@o2{
@p'v.;~#
public static void sort(int[] data) { $@f3=NJ4k
sort(data, IMPROVED_QUICK); mUY:S |
} Gw\HL
private static String[] name={ 4R^j"x 5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %D6Wlf+^n
}; b2@x(5#
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private static Sort[] impl=new Sort[]{ /gy:#-2Gy
new InsertSort(), q^+NhAMz
new BubbleSort(), }Knq9cf
new SelectionSort(), <!nWiwv
new ShellSort(), Ch!Q?4
new QuickSort(), - 5Wt9
new ImprovedQuickSort(), ?GfA;O
new MergeSort(), 7[<sl35
new ImprovedMergeSort(), s6hWq&C
new HeapSort() 3#ZKuGg=
}; `; %aQR
F`}w0=-*(
public static String toString(int algorithm){ qJzK8eW
return name[algorithm-1]; A,[m=9V
} bQQ/7KM
TS8E9#1a
public static void sort(int[] data, int algorithm) { KKXb,/
impl[algorithm-1].sort(data); M!XFb
} cMk%]qfVo8
*TI6Z$b|6
public static interface Sort { %}5"5\Zz
public void sort(int[] data); d7zE8)DU7
} 0P/LW|16
:DpK{$eCb
public static void swap(int[] data, int i, int j) { 3n)iTSU3
int temp = data; ,#;ahwU~s
data = data[j]; Elk$9 <<
data[j] = temp; zate%y
} rAdcMFW
} "?.Wb L