[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; N`{6<Z0
} ZNl1e'
int i1=l; Vc6 >i|"-O
int i2=mid+1; +*Fe
for(int cur=l;cur<=r;cur++){ D>^g2!b:
if(i1==mid+1) lD->1=z
data[cur]=temp[i2++]; ^QjkZ^<dD
else if(i2>r) 4e?bkC
data[cur]=temp[i1++]; H DD)AM&p
else if(temp[i1] data[cur]=temp[i1++]; '? -N
else 5wdKu,nq
data[cur]=temp[i2++]; P_b!^sq9
} w ~"%&SNN
} E^gN]Z"O
\3]O?'
} $BT[fJ'k
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改进后的归并排序: EiaP1o
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package org.rut.util.algorithm.support; 9~$E+m(
<o[3*59
import org.rut.util.algorithm.SortUtil; W'=}2Y$]u
jt(GXgm
/** >y,. `ECn
* @author treeroot ~g%Ht#<
* @since 2006-2-2 )#1!%aQ
* @version 1.0 2#00<t\
*/ 2ga8 G4dU
public class ImprovedMergeSort implements SortUtil.Sort { SkC.A?
b#"&]s-
private static final int THRESHOLD = 10; -E3cS
s|:1z"q
/* ,jtaTG.>
* (non-Javadoc) +Wgfxk'{
* >)u{%@Rcy{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8^D1u`
*/ 717G CL@
public void sort(int[] data) { _yX.Apv]
int[] temp=new int[data.length]; fP6.
mergeSort(data,temp,0,data.length-1); OSLZ7B^
} ^fyue~9u
34[TM3L].
private void mergeSort(int[] data, int[] temp, int l, int r) { *-(o. !#1
int i, j, k; Ycx}FYTY
int mid = (l + r) / 2; xtIF)M
if (l == r) kwqY~@W
return; ADVS}d!;]
if ((mid - l) >= THRESHOLD) k4!_(X%8
mergeSort(data, temp, l, mid); V1GkX=H},
else 4*9t:D|}
insertSort(data, l, mid - l + 1); s[dIWYs#
if ((r - mid) > THRESHOLD) [k(b<'
mergeSort(data, temp, mid + 1, r); KF5r?|8M
else D%LYQ
insertSort(data, mid + 1, r - mid); Vp0_R9oQ
#U7pT!Fx
for (i = l; i <= mid; i++) { ^u#iz
temp = data; Rjlp<
} |W$|og'wC
for (j = 1; j <= r - mid; j++) { 61_-G#W
temp[r - j + 1] = data[j + mid]; c53:E'g
} cH4PrMm&
int a = temp[l]; WRAL/
int b = temp[r]; _%Ua8bR$
for (i = l, j = r, k = l; k <= r; k++) { OB\ZT@l
if (a < b) { ]h&1|j1
data[k] = temp[i++]; 1 ?Zw
a = temp; kM1N4N7
} else { Cz$q"U
data[k] = temp[j--]; Lfdg5D5.P
b = temp[j]; ,nCvA%B!
} CWRB/WH:
} ~b!la
} tJn"$A^N
"vQ%` Q
/** RLL%l
* @param data 5~T+d1md
* @param l >Yk|(!v
* @param i ?Yf v^DQ5
*/ 1E'PSq
private void insertSort(int[] data, int start, int len) { ,!GoFu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2K o]Q_,~
} {&^PDa|nD
} >3ZhPvE-p'
} 6,M$TA
} L<3+D
,6pGKCUU:y
堆排序： [^bq?w
JR xY#k
package org.rut.util.algorithm.support; \=[j9'N>
NP.i,H
import org.rut.util.algorithm.SortUtil; z$}9f*W}B
W,[QK~
/** 98O]tL+k/u
* @author treeroot Lj#xZ!mQS
* @since 2006-2-2 rFkZ'rp74b
* @version 1.0 b SgbvnJ
*/ surNJ,)
public class HeapSort implements SortUtil.Sort{ J~ome7L
%G,7Ul1f
/* (non-Javadoc) yzT1Zg_ER
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j}s/)}n|
*/ Zlh 2qq
public void sort(int[] data) { kaiK1/W0;
MaxHeap h=new MaxHeap(); <_Z.fdUA
h.init(data); s^IC]sW\%
for(int i=0;i h.remove(); 9[&ByEAK
System.arraycopy(h.queue,1,data,0,data.length); ov H'_'
} O"EL3$9V
@>.aQE
private static class MaxHeap{ Y<(7u`F
1cMLl6Bp>
void init(int[] data){ $d])>4eQ
this.queue=new int[data.length+1]; 89GW!
for(int i=0;i queue[++size]=data; %t!r pyD
fixUp(size); OHj>ufwVq
} )\VuN-d
} T+zhj++
u0sN[<
private int size=0; &~/g[\Y
&a e!lB
private int[] queue; ';8 ,RTe
l;A'^
public int get() { WQ.{Ag?1
return queue[1]; %mU$]^Tw(
} YQFz6#Ew
u9~Ncz
public void remove() { KnA BFH
SortUtil.swap(queue,1,size--); EA1&D^nT
fixDown(1); 9+@z:j
} %saP>]o
file://fixdown ?u:mscb
private void fixDown(int k) { <pa-C2Ky
int j; bpU>(j
while ((j = k << 1) <= size) { oQV3
if (j < size %26amp;%26amp; queue[j] j++; He4HIZ
if (queue[k]>queue[j]) file://不用交换 y(22m+B
break; SFtcO
SortUtil.swap(queue,j,k); MZf?48"f
k = j; O43"-
} ')yYpWO
} cr]b #z
private void fixUp(int k) { rr\u)D#)
while (k > 1) { a3w6&e`
int j = k >> 1; QJVB:>A
if (queue[j]>queue[k]) S#oBO%!
break; fK]%*i_"
SortUtil.swap(queue,j,k); vL[IVBG^
k = j; X[$|I9
} nsXG@CS:
} O`%F{&;29
4VeT]`C^h
} ^q/$a2<4
C{nk,j L
} <&+jl($"
-:'%YHxX
SortUtil： 1i.3P$F
:BV$3]y
package org.rut.util.algorithm; ;r6YIS4@
W-|CK&1
import org.rut.util.algorithm.support.BubbleSort; J@<f*
import org.rut.util.algorithm.support.HeapSort; 4Hb"yp$
import org.rut.util.algorithm.support.ImprovedMergeSort; [4YRyx&:++
import org.rut.util.algorithm.support.ImprovedQuickSort; No[9m_
import org.rut.util.algorithm.support.InsertSort; q&&"8.w-
import org.rut.util.algorithm.support.MergeSort; U&Atgv
import org.rut.util.algorithm.support.QuickSort; U=j`RQ 9,
import org.rut.util.algorithm.support.SelectionSort; "+qZv(
import org.rut.util.algorithm.support.ShellSort; >FHx],
ZlE=P4`X:
/** :8}Qt^p
* @author treeroot Tmu2G/yi
* @since 2006-2-2 G,P k3>I'
* @version 1.0 #?D[WTV
*/ >d"\
public class SortUtil { i?@7>Ca
public final static int INSERT = 1; Evg#sPu\
public final static int BUBBLE = 2; KVEc:<|x
public final static int SELECTION = 3; ;@gI*i N"
public final static int SHELL = 4; c2:,
public final static int QUICK = 5; }W!w
public final static int IMPROVED_QUICK = 6; +lFBH(o]X
public final static int MERGE = 7; /u90)x
public final static int IMPROVED_MERGE = 8; DoO ;VF
public final static int HEAP = 9; @cxM#N8e
\Wppl,"6c
public static void sort(int[] data) { s?1Aj<
sort(data, IMPROVED_QUICK); aL;zN%Tw
} 9fTl6?x
private static String[] name={ PGxv4(%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =^*EM<WG)
}; b">"NvlB
Lp}V 94xT
private static Sort[] impl=new Sort[]{ (;9fkqm%m
new InsertSort(), QKvaTy#
new BubbleSort(), P92pQ_W
new SelectionSort(), =x(k)RTDu
new ShellSort(), fMW=ss^fu-
new QuickSort(), Nknd8>Hy+
new ImprovedQuickSort(), =)i^E9
new MergeSort(), RhF<{U.
new ImprovedMergeSort(), yU7XX+cB7
new HeapSort() 7oUo[
}; aYpc\jJ
C9k"QPE
public static String toString(int algorithm){ \7xc*v [
return name[algorithm-1]; yEJ3O^(F
} (~F}O
J &=5h.G$
public static void sort(int[] data, int algorithm) { D?*du#6
impl[algorithm-1].sort(data); &pz`gna
} ^:f)XZ
`2V{]F
public static interface Sort { 8<Yv:8%B6
public void sort(int[] data); > 9z-/e
} vKdS1Dn1
g?}h*~<b
public static void swap(int[] data, int i, int j) { MOB'rPIUI
int temp = data; }y+a)2
data = data[j]; .S=|ZP+
data[j] = temp; !rqs!-cCQ
} M 0G`P1o
} wxvVtV{u>|