[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; c%G~HOE=B
} rYPuo
int i1=l; n.N0Nhd
int i2=mid+1; Kc] GE#~g
for(int cur=l;cur<=r;cur++){ r9}(FL/)b
if(i1==mid+1) (~\HizSl
data[cur]=temp[i2++]; fATnza
else if(i2>r) 9ox5,7ZQ
data[cur]=temp[i1++]; S9:ij1
else if(temp[i1] data[cur]=temp[i1++]; y46sL~HRv
else "?aE3$/
data[cur]=temp[i2++]; W{JR%Sq$
} d>J +7ex+
} KDg%sgRu}
/FXb,)1t
} T^8`ji
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改进后的归并排序: 0@'-g^PS
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package org.rut.util.algorithm.support; X..M!3W
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import org.rut.util.algorithm.SortUtil; {nZP4jze
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/** %QDAog
* @author treeroot }}Q h_(
* @since 2006-2-2 _JpTHpqu
* @version 1.0 wD
*/ [Ketg
public class ImprovedMergeSort implements SortUtil.Sort { C.=%8|Zy
}rVLWt
private static final int THRESHOLD = 10; C]ho7qC
qzY:>>d'
/* 3 P\4K
* (non-Javadoc) J'#o6Ud
* SPTx-b[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =`}|hI
*/ jbOwpyH
public void sort(int[] data) { :`yW^b
int[] temp=new int[data.length]; &_QD1 TT
mergeSort(data,temp,0,data.length-1); ,uO?f1
} |.~2C14[
2sBYy 8.r
private void mergeSort(int[] data, int[] temp, int l, int r) { &xj,.;
int i, j, k; 5 a&a-(
int mid = (l + r) / 2; r,,*kE
if (l == r) =;8q`
return; 4tiCxf)
if ((mid - l) >= THRESHOLD) V,7Xeh(+5L
mergeSort(data, temp, l, mid); q/7T-"q/G
else L{f0r!d|
insertSort(data, l, mid - l + 1); Ov:U3P?%
if ((r - mid) > THRESHOLD) 7'{%djL
mergeSort(data, temp, mid + 1, r); 3gCP?%R
else Kv5 !cll5
insertSort(data, mid + 1, r - mid); 6XhS g0s
-k,}LJjo
for (i = l; i <= mid; i++) { ]nS9taEA
temp = data; O St~P^1
} #R=6$
for (j = 1; j <= r - mid; j++) { g>?,,y6/w
temp[r - j + 1] = data[j + mid]; &fxyY(
} sBN4:8
int a = temp[l]; B`%%,SLJ
int b = temp[r]; L@ N\8mf
for (i = l, j = r, k = l; k <= r; k++) { NUY sQO)
if (a < b) { I7#+B1t
data[k] = temp[i++]; A{hST~s
a = temp; }N3Ur~X\
} else { _rUsb4r
data[k] = temp[j--]; "y .(E7 6
b = temp[j]; "X1{*
} /h!iLun7I
} v Dph}Z
} bsWDjV~
n QOLR?%
/** M)nf(jw#G
* @param data A@EUH
* @param l 9jUm0B{?
* @param i Z+;670Z
*/ V,3$>4x
private void insertSort(int[] data, int start, int len) { 1B`0.M'd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HX:^:pF}
} X%M*d%n b
} nR?m,J
} ;Uj=rS`Q
} (@*#Pn|A
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堆排序： sv>c)L}I
A$'rT|>se
package org.rut.util.algorithm.support; 9TE-'R@
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import org.rut.util.algorithm.SortUtil; FU(s jB
#w]:<R^
/** ZsDn`8
* @author treeroot wW;!L=j
* @since 2006-2-2 )Chx,pcx<
* @version 1.0 /aMeKM[L`
*/ TCO^9RP<
public class HeapSort implements SortUtil.Sort{ "IsDL^)A9
NB/ wJ3 F
/* (non-Javadoc) T$xY]hqr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ki_Py5
*/ }~o>H a;
public void sort(int[] data) { h3L{zOff
MaxHeap h=new MaxHeap(); kF*^" Cn
h.init(data); cd*F;h
for(int i=0;i h.remove(); ,W<mz7Z(@
System.arraycopy(h.queue,1,data,0,data.length); A?OaP
} GfT`>M?QGK
6t6#<ts
private static class MaxHeap{ !Zf)N_k
,ffH:3F
void init(int[] data){ -Z%B9ql'
this.queue=new int[data.length+1]; 9/S-=VOe.t
for(int i=0;i queue[++size]=data; U_c9T>=
fixUp(size); ur`:wR] 2?
} 2f@gR9T
} JS1''^G&.
[VwoZX:
private int size=0; ,a,coeL
fqU*y 6]
private int[] queue; i(XqoR-x
7L&=z$U@m
public int get() { }Pe0zx.Ge
return queue[1]; {oN7I'>
} i50^%,
8MPXrc,9-
public void remove() { as6YjE.Yy
SortUtil.swap(queue,1,size--); :Keek-E`e=
fixDown(1); !pLQRnI}6
} e|ngnkf(G
file://fixdown s|Acv4| V
private void fixDown(int k) { '|i<?]U
int j; ff9D{$V5
while ((j = k << 1) <= size) { 'PrrP3lO_~
if (j < size %26amp;%26amp; queue[j] j++; eu|cQ^>
if (queue[k]>queue[j]) file://不用交换 gaw/3@
break; }@:vq8%Q
SortUtil.swap(queue,j,k); q\g|K3V)
k = j; <ibEo98
} L?e N(L
} cvvba 60
private void fixUp(int k) { Cuq=>J
while (k > 1) { RcH",*U
int j = k >> 1; N&t+*kF_
if (queue[j]>queue[k]) A/EW57v"
break; %g4G&My@J
SortUtil.swap(queue,j,k); >;.'$-
k = j; (r?41?5K
} LHb(T`.=
} ^H1B62_
QvH=<$
} Zg/ra1n
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} P'6eK?
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SortUtil： kN*,3)T;}
J!,<NlP0K
package org.rut.util.algorithm; -%lA=pS{Fq
'Bp7LtG92
import org.rut.util.algorithm.support.BubbleSort; h$EH|9HAb
import org.rut.util.algorithm.support.HeapSort; {WJ+6!v
import org.rut.util.algorithm.support.ImprovedMergeSort; ;|f|d?Q\
import org.rut.util.algorithm.support.ImprovedQuickSort; ^F `
import org.rut.util.algorithm.support.InsertSort; pAo5c4y!4
import org.rut.util.algorithm.support.MergeSort; c} GH|i
import org.rut.util.algorithm.support.QuickSort; W"_")V=QBz
import org.rut.util.algorithm.support.SelectionSort; V3NQij(
import org.rut.util.algorithm.support.ShellSort; #,1Kum bG3
2R2ws.}
/** E hROd
* @author treeroot r_f?H@v
* @since 2006-2-2 3U0>Y%m|,
* @version 1.0 p#UrZKR
*/ _>8ZL)NQQ
public class SortUtil { W4Ey]y"
public final static int INSERT = 1; ew#t4~hh
public final static int BUBBLE = 2; WCc,RI0
public final static int SELECTION = 3; %># VhK
public final static int SHELL = 4; %(IkUD
public final static int QUICK = 5; 9"3 7va
public final static int IMPROVED_QUICK = 6; K"O+`2$
public final static int MERGE = 7; I65W^b4y
public final static int IMPROVED_MERGE = 8; gUs.D_*
public final static int HEAP = 9; 0?KY9
T\VKNEBo
public static void sort(int[] data) { xG JX~)
sort(data, IMPROVED_QUICK); GRK+/1C
} ]kQ*t{\
private static String[] name={ IdsPB)k_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O9#8%p% )
}; g?.ls{H
v"VpE`z1#
private static Sort[] impl=new Sort[]{ K]{Y >w
new InsertSort(), Lj"@JF;c
new BubbleSort(), N,9W18 @
new SelectionSort(), r5kKNyJ
new ShellSort(), u:Fa1 !4JR
new QuickSort(), bhqBFiuhH
new ImprovedQuickSort(), '%.:97
new MergeSort(), ]o18oY(
new ImprovedMergeSort(), eM";P/XaX
new HeapSort() U_t[J|
}; mhZ{}~
9?5'>WO
public static String toString(int algorithm){ ;x/do?FbT
return name[algorithm-1]; +ML4.$lc^
} [&e|:1
cn62:p]5
public static void sort(int[] data, int algorithm) { m5c?A+@fZ
impl[algorithm-1].sort(data); %~eIx=s
} TUw+A6u:p
-?_#Yttu
public static interface Sort { AI{Tw>hZ
public void sort(int[] data); ;m<22@,E&
} d<{>&
{t<E*5N]a
public static void swap(int[] data, int i, int j) { ~:`5Y"Av:
int temp = data; EDQKbTaPt
data = data[j]; v?Z30?_&h
data[j] = temp; F xek#
} |$*1!pL-QP
} or~2r8