[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; a>3#z2#
} O WJv<3
int i1=l; U Bo[iZ|%
int i2=mid+1; F\!Va
for(int cur=l;cur<=r;cur++){ G5C=p:o{/
if(i1==mid+1) PrA?e{B5m
data[cur]=temp[i2++]; lT`y=qR|
else if(i2>r) 0E6>PE;
data[cur]=temp[i1++]; S;!l"1[;
else if(temp[i1] data[cur]=temp[i1++]; : h"Bf@3
else {8!\aYI
data[cur]=temp[i2++]; W@X/Z8.(
} v;S_7#
} q%G"P*g$(
t`b!3U>I
} .ZV-]jgr
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改进后的归并排序: =Nyq1~
j_3X 1w)k
package org.rut.util.algorithm.support; mes/gqrJ1I
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import org.rut.util.algorithm.SortUtil; w=dTa5
,YEwz3$5u
/** 2j9+ f{ l
* @author treeroot s)gUvS\
* @since 2006-2-2 *0EB{T1
* @version 1.0 2J>v4EWC
*/ 0 `Yg
public class ImprovedMergeSort implements SortUtil.Sort { Cb`2"mpWS
*B$$6'hi`
private static final int THRESHOLD = 10; 91|0{1
OA_WjTwDs
/* fFr[ &\[
* (non-Javadoc) ?h7,q*rxk
* X&s@S5=r]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dX720/R
*/ y4jJ&
public void sort(int[] data) { RM5$O+"
int[] temp=new int[data.length]; IB'gY0*
mergeSort(data,temp,0,data.length-1); |a>W9Ym
} +7`7cOqXg
i4Ps#R_wx
private void mergeSort(int[] data, int[] temp, int l, int r) { &bIE"ZBjt
int i, j, k; LqDj4[}
int mid = (l + r) / 2; !=-{$& {
if (l == r) fz9 ,p;b
return; vtm?x,h
if ((mid - l) >= THRESHOLD) q6A"+w,N
mergeSort(data, temp, l, mid); bu}N{cW
else X(YR).a~
insertSort(data, l, mid - l + 1); ;,OZ8g)LH
if ((r - mid) > THRESHOLD) Eku+&f@RB
mergeSort(data, temp, mid + 1, r); Vr|sRvz
else li4"|T&
insertSort(data, mid + 1, r - mid); vXq2="+
+dw=)A#/
for (i = l; i <= mid; i++) { 2^V/>|W>w
temp = data; I(bxCiRV
} `vMrlKq
for (j = 1; j <= r - mid; j++) { _?aI/D
temp[r - j + 1] = data[j + mid]; jDyG~de
} UWf@(8
int a = temp[l]; NFAjh?#
int b = temp[r]; $,s"c(pv[,
for (i = l, j = r, k = l; k <= r; k++) { [v,Y-}wQ)
if (a < b) { t'7A-K=k3
data[k] = temp[i++]; 8<2 [ F
a = temp; B%L dH
} else { Ub"6OT1tl
data[k] = temp[j--]; UP+4xG
b = temp[j]; 4^OPzg6Z%p
} bvR0?xnq
} !_a@autj
} RTXl3 jq
dXBXV>rbB
/** q]^Q?r<g::
* @param data V\2&?#GZ
* @param l qsUob
* @param i 2k}8`P;
*/ <,X?+hr
private void insertSort(int[] data, int start, int len) { +~ZFao qf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9pehQFfH
} IXz)xdP
} y%wjQC 0~
} &_Vd
} Z1&<-T_
u/,ng&!
堆排序： =Zt7}V
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package org.rut.util.algorithm.support; fxcCz 5
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import org.rut.util.algorithm.SortUtil; i*3*)ly
+{7/+Zz
/** W["c3c
* @author treeroot vIK+18v7
* @since 2006-2-2 7)FI_uW
* @version 1.0 Y/Dah*
*/ Ln3<r&&Jz
public class HeapSort implements SortUtil.Sort{ |B` mWZ'"
:wRaB7
/* (non-Javadoc) YU(|i}b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V\=QAN^
*/ HUuZ7jJwf
public void sort(int[] data) { *D_pFS^l
MaxHeap h=new MaxHeap(); :'+- %xUM
h.init(data); :#pfv)W6t
for(int i=0;i h.remove(); [ELg:f3}5
System.arraycopy(h.queue,1,data,0,data.length); NZaMF.
} 61*inGRB
UbDRE[^P
private static class MaxHeap{ $HE ?B{
%1jlXa
void init(int[] data){ gA/8Df\G:l
this.queue=new int[data.length+1]; \-F F[:|J
for(int i=0;i queue[++size]=data; ky^u.+cZ
fixUp(size); {CVn&|}J
} Zf [#~4
} H\[:uUK5\
^j)0&}fB
private int size=0; 6.0/asN}
!=t.AgmL
private int[] queue; qz]g4hS
T=-$ok`G
public int get() { V]fsjpvlmr
return queue[1]; )RZ:\:c
} .~L^h/)Gjy
!92zC._
public void remove() { c1CUG1i
SortUtil.swap(queue,1,size--); +o*&JoC
fixDown(1); [$+N"4
} &nXa/XIZ_
file://fixdown CEMe2~
private void fixDown(int k) { Ga9^+.j
int j; 7L"Pe'Hw
while ((j = k << 1) <= size) { u&7c2|Q
if (j < size %26amp;%26amp; queue[j] j++; JPt0k
if (queue[k]>queue[j]) file://不用交换 x]X!nx6G
break; {r.yoI4e
SortUtil.swap(queue,j,k); 8t$w/#'@
k = j; @4ECz>Q
} 2dpTU=K4
} 8`?vWJS
private void fixUp(int k) { sm1(I7y
while (k > 1) { ^@a|s Sb
int j = k >> 1; x8v2mnk
if (queue[j]>queue[k]) due'c!wW
break; U$+G9
SortUtil.swap(queue,j,k); m-h+UKt
k = j; }X;LR\^u[f
} D3MRRv#
} }0(.HMiGj
h,u?3}Knnb
} zwEZ?m!
\A'tV/YAd
} D$OUy}[2`.
8E:d!?<^&I
SortUtil： {YoK63b$
q=+AN</
package org.rut.util.algorithm; \as^z!<
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import org.rut.util.algorithm.support.BubbleSort; pk&;5|cCD
import org.rut.util.algorithm.support.HeapSort; i[\`]C{gf
import org.rut.util.algorithm.support.ImprovedMergeSort; 7yDWcm_y
import org.rut.util.algorithm.support.ImprovedQuickSort; G$HXc$OY
import org.rut.util.algorithm.support.InsertSort; Y8$,So>~
import org.rut.util.algorithm.support.MergeSort; _,C>+dv)
import org.rut.util.algorithm.support.QuickSort; 0wlKBwf`J
import org.rut.util.algorithm.support.SelectionSort; =iEQE
import org.rut.util.algorithm.support.ShellSort; `r$c53|<u
(uk-c~T!u
/** tXWhq
* @author treeroot 9R6]OL)p
* @since 2006-2-2 y~ZYI]` J
* @version 1.0 "N\tR[P!
*/ o(5eb;"yi>
public class SortUtil { y))) {X
public final static int INSERT = 1; BWHH:cX
public final static int BUBBLE = 2; "F3M m
public final static int SELECTION = 3; ;I5u"MDHGI
public final static int SHELL = 4; }kK6"]Tj
public final static int QUICK = 5; %x2_njDd
public final static int IMPROVED_QUICK = 6; #3WKm*T/
public final static int MERGE = 7; F=qG+T
public final static int IMPROVED_MERGE = 8; &P,z$H{o@
public final static int HEAP = 9; ZNX=]]HM<n
6k@(7Mw8A
public static void sort(int[] data) { e71dNL'$
sort(data, IMPROVED_QUICK); bWe_<'N
} nR2pqaKc
private static String[] name={ lz-t+LD@ST
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &0='z
}; Pgp`g.$<
HLYTt)f}
private static Sort[] impl=new Sort[]{ }bZcVc2
new InsertSort(), \ O#6H5F
new BubbleSort(), #F~^m
new SelectionSort(), 0:SR29(p1
new ShellSort(), 3cH`>#c
new QuickSort(), (Q/Kp*a
new ImprovedQuickSort(), $0OWPC1
new MergeSort(), mTsl"A>
new ImprovedMergeSort(), X-$\DXRIo
new HeapSort() M~uX!bDH
}; 6L)]nE0^
jwe^(U
public static String toString(int algorithm){ tU :,s^E"#
return name[algorithm-1]; fZH";_"1
} k-`5TmW
(r]3tGp
public static void sort(int[] data, int algorithm) { _K#LOSMfj/
impl[algorithm-1].sort(data); 6hvmp
} 42Vz6 k:
<.HDv:
public static interface Sort { {#]vvO2~$
public void sort(int[] data); ,8vqzI
} pFZ2(b&
2Y`C\u
public static void swap(int[] data, int i, int j) { OK6c"*<z
int temp = data; #w *]`5 T
data = data[j]; .-[d6Pnw
data[j] = temp; ha%3%O8Z
} mK>c+ u)
} _?+gfi+