[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; @ebSM#F?
} uq\[^
int i1=l; L=9^Y/8Q
int i2=mid+1; &e)V!o@wJV
for(int cur=l;cur<=r;cur++){ /vNHb_-
if(i1==mid+1) ' o(7@
data[cur]=temp[i2++]; hOj(*7__
else if(i2>r) O/Mx$Q3re
data[cur]=temp[i1++]; JyDg=%-$2
else if(temp[i1] data[cur]=temp[i1++]; R q9(<'F
else ,-`A6ehg
data[cur]=temp[i2++]; y134m
} yt[*4gF4
} [ ~:wS@%
jUGk=/*]e
} +nz0ZQ9 a
X|4_}b>x
改进后的归并排序: ~%?LFR'
"1z#6vw5a
package org.rut.util.algorithm.support; lQKq{WLFx.
Lhmb= @
import org.rut.util.algorithm.SortUtil; h[>Puoz
?.Lq`~T`
/** }s@vN8C
* @author treeroot sh)[|?7z
* @since 2006-2-2 k] iyx
* @version 1.0 oef]
*/ 3A!Qu$r9
public class ImprovedMergeSort implements SortUtil.Sort { TrR=3_;.7
O#n=mJ
private static final int THRESHOLD = 10; dM)x|b3z
_fjHa6S
/* ^8V8,C)
* (non-Javadoc) ~%!"!Z4
* |Sr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WwF2Ry^a
*/ cI (}
public void sort(int[] data) { CfEACH4_
int[] temp=new int[data.length]; '7JM/AcC#K
mergeSort(data,temp,0,data.length-1); sUz,F8G
} <%"o-xZq7C
ukc<yc].+?
private void mergeSort(int[] data, int[] temp, int l, int r) { IN?6~O p
int i, j, k; ~nRbb;M
int mid = (l + r) / 2; i;fU],aK!
if (l == r) CZDWEM}
return; b^R_8x
if ((mid - l) >= THRESHOLD) =4#p|OZP
mergeSort(data, temp, l, mid); l5FKw;=K}:
else IiM=Z=2
insertSort(data, l, mid - l + 1); 3XcFBFE
if ((r - mid) > THRESHOLD) &~V6g(9
mergeSort(data, temp, mid + 1, r); MuF{STE>->
else X86r`}
insertSort(data, mid + 1, r - mid); ZZrvl4h
zbAyYMtEk
for (i = l; i <= mid; i++) { Mz: "p.
temp = data; S!8q>d,%L
} !SdP<{[
for (j = 1; j <= r - mid; j++) { 8A: =#P^O\
temp[r - j + 1] = data[j + mid]; :&J1#% t
} Ma^}7D /
int a = temp[l]; #ba7r ]Xu
int b = temp[r]; 5 51p* B2
for (i = l, j = r, k = l; k <= r; k++) { Y*0j/91
if (a < b) { -\~HAnh
data[k] = temp[i++]; ~;vt{pk
a = temp; IVso/!
} else { $fAZ^
data[k] = temp[j--]; :aR_f`KMm
b = temp[j]; k-I U}|Xz
} \[<8AV"E-'
} n'83P%x
} `{H!V~42
GP0}I@>?
/** $_O;yz
* @param data 0?*":o30
* @param l d@ef+-
* @param i OZ4%6/
*/ `>u^Pm
private void insertSort(int[] data, int start, int len) { oT i$@q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FJ2~SKWT
} ^?S lM
} thSXri?kl
} YP73
} Ww =ksggpB
#B5-3CwB
堆排序： ONMR2J(
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package org.rut.util.algorithm.support; 'o|=_0-7W
qPn!.m$/
import org.rut.util.algorithm.SortUtil; l4AXjq2
WO=P~F<
/** C ett*jm_
* @author treeroot og`g]Z<I
* @since 2006-2-2 T/P
* @version 1.0 KJW^pAj$B
*/ jdd3[
public class HeapSort implements SortUtil.Sort{ A'suZpL
/X;! F>
/* (non-Javadoc) Ygc.0VKMR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (r/))I9^
*/ x,Z:12H0
public void sort(int[] data) { ;!B>b)%
MaxHeap h=new MaxHeap(); :nS p
h.init(data); ~j[mME}
for(int i=0;i h.remove(); /! M%9gu
System.arraycopy(h.queue,1,data,0,data.length); uOJso2Mx
} i2?TMM!Fe
D 4<,YBvV
private static class MaxHeap{ 9s#*~[E*
3w8v.J8q
void init(int[] data){ K_-S`-eH
this.queue=new int[data.length+1]; dG)}H_
for(int i=0;i queue[++size]=data; H,;9' *84
fixUp(size); b q8nV
} ,"Nb;Yhg
} wLKC6@ W
3+8{Y
private int size=0; U]"6KS
t:%u4\nZ;
private int[] queue; dC?l%,W
' pfkbmJ
public int get() { },,K6*P
return queue[1]; @Uqcym.
} NW~`oc)NS
.e|\Bf0P
public void remove() { UQq Qim
SortUtil.swap(queue,1,size--); 6t'vzcQs
fixDown(1); R]NCD*~
} Ur(< ]
file://fixdown ^]9.$$GU\A
private void fixDown(int k) { vlPViHF.
int j; 41c4Xj?'
while ((j = k << 1) <= size) { "(yw(/
if (j < size %26amp;%26amp; queue[j] j++; ?S'Wd=
if (queue[k]>queue[j]) file://不用交换 v dPb-z4
break; %)=c#H1
SortUtil.swap(queue,j,k); 89ab?H}/
k = j; h! wd/jR
} _^p\ u
} mBDzc(_\$'
private void fixUp(int k) { &'c&B0j
while (k > 1) { CzI/Z+\
int j = k >> 1; *C,1x5
if (queue[j]>queue[k]) >Dq&[9,8
break; JxQGL{) >
SortUtil.swap(queue,j,k); p*~b5'+ C+
k = j; ?;DzWCL~9
} ZQ[s/
} M+WN\.2pX
c> ":g~w
} % {A%SDh
yAu.=Eo7
} +z+u=)I
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SortUtil： *u!l"0'\
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package org.rut.util.algorithm; >uJU25)|
cfL:#IM
import org.rut.util.algorithm.support.BubbleSort; Cf3<;Mp<
import org.rut.util.algorithm.support.HeapSort; 0[1/#0$
import org.rut.util.algorithm.support.ImprovedMergeSort; h`:B8+k
import org.rut.util.algorithm.support.ImprovedQuickSort; \+)AQ!E
import org.rut.util.algorithm.support.InsertSort; qwYq9A$+
import org.rut.util.algorithm.support.MergeSort; gk4DoOj#P
import org.rut.util.algorithm.support.QuickSort; r-5xo.J'
import org.rut.util.algorithm.support.SelectionSort; cL:hjr"
import org.rut.util.algorithm.support.ShellSort; :7pt=IA
RT"JAJTi/
/** H'x_}y
* @author treeroot 1_z~<d @?;
* @since 2006-2-2 |],ocAN{
* @version 1.0 :@J.!dokF
*/ L[lS >4eN
public class SortUtil { B)s%B'
public final static int INSERT = 1; DpQ:U5j
public final static int BUBBLE = 2; \0z<@)r+AJ
public final static int SELECTION = 3; L!^^3vn
public final static int SHELL = 4; _OJ19Ry
public final static int QUICK = 5; g>-u9%aa
public final static int IMPROVED_QUICK = 6; Q&e*[l2M6
public final static int MERGE = 7; %^bN^Sq -
public final static int IMPROVED_MERGE = 8; }N@+bNh~
public final static int HEAP = 9; M$2lK^2L
7z3YzQ=Kg
public static void sort(int[] data) { A'T: \Wl
sort(data, IMPROVED_QUICK); =7-@&S=?s
} z_L><}H
private static String[] name={ B{cb'\C
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3=IY0Q>/(
}; J;Veza
W4:#=.m
private static Sort[] impl=new Sort[]{ m]/sR3yF
new InsertSort(), =xM:8 hm
new BubbleSort(), vp`s< ;CA
new SelectionSort(), YI),yj
new ShellSort(), #80M+m
new QuickSort(), D@yu2}F{IY
new ImprovedQuickSort(), YbuS[l8
new MergeSort(), F^X:5g~K
new ImprovedMergeSort(), &U yQ<O>
new HeapSort() ?V4bz2#!1O
}; L*1yK*
"M=1Eb$6=
public static String toString(int algorithm){ aaFt=7(K
return name[algorithm-1]; $Zf]1?|xa
} $mF9os-
f9La79v
public static void sort(int[] data, int algorithm) { /xkF9
impl[algorithm-1].sort(data); cGS7s 8U
} "i;"
a fUOIM
public static interface Sort { U )J/so)
public void sort(int[] data); l6< bV#_qe
} h|[oQ8)
@tPptB
public static void swap(int[] data, int i, int j) { d8M8O3
int temp = data; oVeC@[U
data = data[j]; +XL|bdK
data[j] = temp; u51Lp
} 7/6%92T/B
} nSB@xP#&