[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; GGM|B}U p
} ppm=o4`s[
int i1=l; _sp,,gz
int i2=mid+1; x3>ZO.Q
for(int cur=l;cur<=r;cur++){ &7\=Jw7w
if(i1==mid+1) #}PQ !gZ
data[cur]=temp[i2++]; 8k( zU>^
else if(i2>r) t4;eabZK
data[cur]=temp[i1++]; k kZ2Jxvx
else if(temp[i1] data[cur]=temp[i1++]; UWW^g@d4
else uBp,_V?
data[cur]=temp[i2++]; y ;/T.W9!
} .2Q4EbM2
} W)X" G3
#!0=I s^
} C33BP}c]
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改进后的归并排序: xNrPj8V<Y
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package org.rut.util.algorithm.support; jj,CBNo(
-/V,<@@T
import org.rut.util.algorithm.SortUtil; N!PPL"5z
Vjdu9Ez
/** '2S/FOb
* @author treeroot 6N49q-.Lg
* @since 2006-2-2 TdU'L:<4l
* @version 1.0 c>|1%}"?
*/ cp:U@Nh(
public class ImprovedMergeSort implements SortUtil.Sort { d/8p?Km
"|Ke/0rGB
private static final int THRESHOLD = 10; f};RtRo2
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/* Z bW!c1s{
* (non-Javadoc) bcR";cE
* adcH3rV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x/pX?k
*/ B_uhNLd
public void sort(int[] data) { /~(T[\E<
int[] temp=new int[data.length]; ~hZr1hT6L
mergeSort(data,temp,0,data.length-1); exZgk2[0
} 2jVvK"C
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private void mergeSort(int[] data, int[] temp, int l, int r) { SeV`RUO
int i, j, k; 8aqH;|fG}
int mid = (l + r) / 2; }6'%p Bd
if (l == r) _4f=\
return; UVd ^tg
if ((mid - l) >= THRESHOLD) HJi FlL3
mergeSort(data, temp, l, mid); WaPuJ5;e
else &ggOm
insertSort(data, l, mid - l + 1); lt{Df~c
if ((r - mid) > THRESHOLD) \wKnX]xGf
mergeSort(data, temp, mid + 1, r); $$ 9!4
else p uZY4}b_
insertSort(data, mid + 1, r - mid); q)l1tC72
d[\$a4G+
for (i = l; i <= mid; i++) { <Fi*wV
temp = data; 34 '[O
} MpVZL29)
for (j = 1; j <= r - mid; j++) { b$eN]L
temp[r - j + 1] = data[j + mid]; 43}uW,P
} ~} 02q5H
int a = temp[l]; !C& ^%a
int b = temp[r]; c(kYCVc
for (i = l, j = r, k = l; k <= r; k++) { !gm@QO cF
if (a < b) { h]]B@~
data[k] = temp[i++]; "C.cU
a = temp; )Z*nm<=
} else { N;HG@B!m
data[k] = temp[j--]; -kP$S qR~
b = temp[j]; hz+O.k],?
} rQ-,mq
} Rb_%vOM
} y&W3CW\:
xV0:K=
/** kz"QS.${
* @param data &R))c|>OT&
* @param l /M@[ 8
* @param i FfX*bqy
*/ NI:3hfs
private void insertSort(int[] data, int start, int len) { YO9ofT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C"0vMUZ
} K8JshFIe
} 5^97#;Q;J"
} ,_UTeW6M
} c :2w(BVi
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堆排序： \>tx:;D3
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package org.rut.util.algorithm.support; o3X0c6uU
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import org.rut.util.algorithm.SortUtil; {pXqw'"1.
d}2(G2z^
/** 7lx]`u>
* @author treeroot rhDiIO_
* @since 2006-2-2 4 'DEdx,&f
* @version 1.0 4iv&!hAc;
*/ zGwM# -
public class HeapSort implements SortUtil.Sort{ oh7tE$"c
iOtf7.@
/* (non-Javadoc) }OqP`B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xnDst9%
*/ Q0%s|8Jc
public void sort(int[] data) { HPXJRQBE
MaxHeap h=new MaxHeap(); uE}$ZBiq
h.init(data); X>i{288M3
for(int i=0;i h.remove(); cAn_:^
System.arraycopy(h.queue,1,data,0,data.length); A[`2Mnj
} !-m 'diE
(F&o!W
private static class MaxHeap{ *mz-g7
!E6QED"
void init(int[] data){ H@te!EE
this.queue=new int[data.length+1]; i!*8@:VI
for(int i=0;i queue[++size]=data; b"nD5r
fixUp(size); }LY)FT4n
} }J`cRDO
} O Cnra
UZ1Au;(|
private int size=0; -' =?Hs.
>uxAti\
private int[] queue; 3i#'osq
2;x+#D8
public int get() { tHEZuoi
return queue[1]; I9<%fv
} @V Sr'?7-
:_h#A}8Xd
public void remove() { Fd#Zu.Np
SortUtil.swap(queue,1,size--); VV/aec8
fixDown(1); 4+Jf!ovS=
} 1/v#Z#3[
file://fixdown V0G[f}tm'
private void fixDown(int k) { 3pe1"maP
int j; p/HGI)'
while ((j = k << 1) <= size) { 3U'l'H,
if (j < size %26amp;%26amp; queue[j] j++; iikMz|:7U
if (queue[k]>queue[j]) file://不用交换 q7pe\~q
break; M[C)b\
SortUtil.swap(queue,j,k); <b?$-Rx
k = j; x->+wJm@s
} T_d)1m fl
} }/4),W@<
private void fixUp(int k) { d(K}v\3!
while (k > 1) { Z^J7r&\V
int j = k >> 1; \zeuvD
if (queue[j]>queue[k]) BZ(DP_}&D
break; $$XeCPs0
SortUtil.swap(queue,j,k); "8Lv
k = j; rN,T}M=2
} L^=G(op*
} <`u_O!h
i]Bu7Fuu
} F_0@Sh"
fRHzY?n9;
} QQt4pDir>
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SortUtil： F##xVmR~
L#S|2L_hC
package org.rut.util.algorithm; CaVVlL
>uYU_/y$2
import org.rut.util.algorithm.support.BubbleSort; x.sC015Id
import org.rut.util.algorithm.support.HeapSort; oPVt qQ
import org.rut.util.algorithm.support.ImprovedMergeSort; r^{Bw1+
import org.rut.util.algorithm.support.ImprovedQuickSort; B=%x#em
import org.rut.util.algorithm.support.InsertSort; 7nsovWp
import org.rut.util.algorithm.support.MergeSort; UjMWSPEBy
import org.rut.util.algorithm.support.QuickSort; ZSr!L@S
import org.rut.util.algorithm.support.SelectionSort; ?g:sAR'
import org.rut.util.algorithm.support.ShellSort; W\<HUd
cdN=HM~I
/** -e>Z!0
* @author treeroot D^}2ilk!
* @since 2006-2-2 <`?%Cz AO
* @version 1.0 z0%tBgqY(
*/ hVl@7B~
public class SortUtil { vpC?JXz=H
public final static int INSERT = 1; /t*Q"0X5
public final static int BUBBLE = 2; ZZ T 9t#~
public final static int SELECTION = 3; n:f&4uKoG<
public final static int SHELL = 4; =G !]_d0
public final static int QUICK = 5; bn7g!2
public final static int IMPROVED_QUICK = 6; ErgWsAw-
public final static int MERGE = 7; 5vLA)Al3
public final static int IMPROVED_MERGE = 8; Mcq!QaO}&
public final static int HEAP = 9; < FY%QB)h
[,{Nu EI
public static void sort(int[] data) { 'dqecmB
sort(data, IMPROVED_QUICK); )i_:[ l6
} D G|v'#
private static String[] name={ IyM:9=}5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" qC5IV}9`
}; yF1p^>*ak&
lBa` nG
private static Sort[] impl=new Sort[]{ xZY7X&C4
new InsertSort(), YI`BA`BQ8
new BubbleSort(), BO8?{~i
new SelectionSort(), 4$81ilBcL
new ShellSort(), :98:U~d1
new QuickSort(), 6Kw?
new ImprovedQuickSort(), xSDTO$U8%
new MergeSort(), Xtloyph
new ImprovedMergeSort(), d\zUtcJwC
new HeapSort() KT17I&:
}; R}IuMMx
Xq<_r^
public static String toString(int algorithm){ FlUO3rc|
return name[algorithm-1]; m/;fY>}3
} *aq"c9
y.s\MWvv>u
public static void sort(int[] data, int algorithm) { c|Z6p{)V
impl[algorithm-1].sort(data); GB;_!69I
} p=^6V"'
t,Q"Pt?
public static interface Sort { qe22 kE#
public void sort(int[] data); bR;.KC3C
} G_zK .N
ZAn9A>5_
public static void swap(int[] data, int i, int j) { t/3HX]B_
int temp = data; $sUn'62JlU
data = data[j]; F)Z9Qlo
data[j] = temp; u \<APn
} k3KT':*
} sXNb