[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; cH\.-5NQ
} rc]`PV
int i1=l; .^* .-8q
int i2=mid+1; OLxiY r
for(int cur=l;cur<=r;cur++){ ^T/d34A;SP
if(i1==mid+1) w#`E;fN'
data[cur]=temp[i2++]; {3=]cLtt
else if(i2>r) x AR9* <-
data[cur]=temp[i1++]; '|l1-yD_
else if(temp[i1] data[cur]=temp[i1++]; OX)[?1m8
else @Vac!A??:
data[cur]=temp[i2++]; skn];%[v\
} o%=OBTh_
} TW?A/GoXI
Ny)!uqul*
} cYp]zn+6
V@Fj!/
改进后的归并排序: keWqL]
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package org.rut.util.algorithm.support; 'IroQ M
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import org.rut.util.algorithm.SortUtil; yGtGhP8
=;^#5dpt$
/** ue{0X\[P<
* @author treeroot r%~/y
* @since 2006-2-2 (Y%pk76d
* @version 1.0 u>o2lvy8
*/ Mk@%Wuxg2
public class ImprovedMergeSort implements SortUtil.Sort { E"$AOM?(*i
o72G oUfs
private static final int THRESHOLD = 10; \"@BZ.y
I='S).
/* |/-H:\5
* (non-Javadoc) n$}Cj}eju
* WrNm:N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +\n8##oAI
*/ V8.o}BWY
public void sort(int[] data) { 8(c,b
int[] temp=new int[data.length]; Mm+kG'Z!S
mergeSort(data,temp,0,data.length-1); VdV18-ea
} >|22%YVX
(:]on^|
private void mergeSort(int[] data, int[] temp, int l, int r) { t LZ4<wc
int i, j, k; D|p`~(
int mid = (l + r) / 2; 2-*zevPiG=
if (l == r) Jx8?x#}
return; ~4fjFo&_\
if ((mid - l) >= THRESHOLD) |+Fko8-
mergeSort(data, temp, l, mid); ..xg4V/
else Wq1%
insertSort(data, l, mid - l + 1); +5:oW~ ;
if ((r - mid) > THRESHOLD) yY$:zc"J
mergeSort(data, temp, mid + 1, r); yH0BNz8V
else 3-5X^!C
insertSort(data, mid + 1, r - mid); -_RMiGM?T
Oy^)lF/
for (i = l; i <= mid; i++) { QK3j.Ss
temp = data; 6Tn.56X
} xG^6'<
for (j = 1; j <= r - mid; j++) { DPE]<oM
temp[r - j + 1] = data[j + mid]; pO.+hy
} s*k[Fbi
int a = temp[l]; 9$pQ|e0tJ
int b = temp[r]; HTz&h#)JQ
for (i = l, j = r, k = l; k <= r; k++) { nDvj*lZF
if (a < b) { El$yM.M"
data[k] = temp[i++]; l|c#
a = temp; `}YCUm[SI
} else { { ke}W
data[k] = temp[j--]; -5~&A6+ILn
b = temp[j]; }x^q?;7xW
} Q^qdm5}UkW
} R7)2@;i
} 6ZCSCBW
PO,mg?JG(
/** CE19V:zp
* @param data spE(s%dgL
* @param l BuE=(v2}
* @param i Tq7cZe"6
*/ u"*@k^}(
private void insertSort(int[] data, int start, int len) { n:-:LSa+3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T(E$0a)#
} 4ACL|RF)A
} $s*\yam?|
} qd=&*?
} y()7m/
D)ZGTq`(
堆排序： [nO\Q3c|@$
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package org.rut.util.algorithm.support; A3VXh^y+
kDAPT_Gid
import org.rut.util.algorithm.SortUtil; c5& _'&
u&HLdSHe
/** 2`XG"[@
* @author treeroot =N5~iMorD-
* @since 2006-2-2 lj{Jw.t
* @version 1.0 Ps@a@d"83
*/ [/B$cH
public class HeapSort implements SortUtil.Sort{ df=G}M(
}i7Gv K<[:
/* (non-Javadoc) y my/`%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z3V[ Vi
*/ "w#jC~J<W
public void sort(int[] data) { &jh'B,
MaxHeap h=new MaxHeap(); &QaFX,N"
h.init(data); DdY89R 6
for(int i=0;i h.remove(); /~?'zr
System.arraycopy(h.queue,1,data,0,data.length); C 'YL9r-G
} 0:Ow$
{G:dhi
private static class MaxHeap{ lLq:(zMH
o& g01t
void init(int[] data){ L1FTh
this.queue=new int[data.length+1]; vR X_}`m8#
for(int i=0;i queue[++size]=data; 0=3Av8
fixUp(size); \^$g%a
} Fc{X$hh<
} vN`2KCl~3
\G+ hi9T(
private int size=0; FwB}@)3
}pOem}
private int[] queue; 1'O++j_%y
T)ZO+}
public int get() { 21b
return queue[1]; K+=cNC4B
} MlDWK_y_&
0}a="`p#<
public void remove() { >h?!6L- d
SortUtil.swap(queue,1,size--); S${n:e0\
fixDown(1); IkzY
} _O76Aw-@l
file://fixdown Sm@T/+uG:
private void fixDown(int k) { n-/{H4\
int j; Y7TW_[_u
while ((j = k << 1) <= size) { 3ZZ"mlk*
if (j < size %26amp;%26amp; queue[j] j++; 'jr\F2
if (queue[k]>queue[j]) file://不用交换 'G6g yO/K
break; I\%a<
SortUtil.swap(queue,j,k); S?ypka"L
k = j; p~/
} ;7jszs.6%
} }Zs y&K
private void fixUp(int k) { '<}N`PS#N
while (k > 1) { ia'eV10
int j = k >> 1; u0&QStI
if (queue[j]>queue[k]) i%M6$or
break; cZ6Zx]
SortUtil.swap(queue,j,k); ;L<D-=
k = j; T*AXS|=ju
} ID/=YG@
} {yo<19kV@
I ,j,Hz0
} _Hhf.DmUAH
rD"$,-h
} q%g!TFMg
v}vwk8
SortUtil： avJ%J"j8z
4f)B@A-
package org.rut.util.algorithm; P!c.!8C$
C`4m#
import org.rut.util.algorithm.support.BubbleSort; %rU8^'Gu
import org.rut.util.algorithm.support.HeapSort; ;\[n{<
import org.rut.util.algorithm.support.ImprovedMergeSort; _,,w>q6K
import org.rut.util.algorithm.support.ImprovedQuickSort; ZDQc_{e{
import org.rut.util.algorithm.support.InsertSort; |"j{!Ei
import org.rut.util.algorithm.support.MergeSort; FX"j8i/N
import org.rut.util.algorithm.support.QuickSort; V7+fNr]I
import org.rut.util.algorithm.support.SelectionSort; Rm^3K
import org.rut.util.algorithm.support.ShellSort; uq.!{3)8
})v`` +
/** )=~OP>7B
* @author treeroot c#-o@`Po
* @since 2006-2-2 v- 793pr
* @version 1.0 0|a,bwZ
*/ mE|?0mRA %
public class SortUtil { zla^j,
public final static int INSERT = 1; SauX C
public final static int BUBBLE = 2; RgB5'$x}
public final static int SELECTION = 3; (hB+DPi
public final static int SHELL = 4; })?t:zX#*
public final static int QUICK = 5; DJ zJ$Q
public final static int IMPROVED_QUICK = 6; F gi&CJ8Q
public final static int MERGE = 7; HLlp+;CF><
public final static int IMPROVED_MERGE = 8; [:CV5k~xc
public final static int HEAP = 9; |Ok@:Au
Xr B)[kQ
public static void sort(int[] data) { t<F*ODn
sort(data, IMPROVED_QUICK); 8)Z)pCN
} -~Ll;}nZC
private static String[] name={ ]AB<OjF1c|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |\#~
}; jpGZ&L7i&
F,[GdE;P
private static Sort[] impl=new Sort[]{ C\3;o]
new InsertSort(), &U.U<
new BubbleSort(), |TQ#[9C0
new SelectionSort(), 0~/'c0Ho
new ShellSort(), 3A`|$So
new QuickSort(), 4r+@7hnK
new ImprovedQuickSort(), %1oh+'ES F
new MergeSort(), sGAOK%28
new ImprovedMergeSort(), %0y_WIjz
new HeapSort() D1ep7ykY
}; 43'!<[?x
h4 X=d5qd
public static String toString(int algorithm){ _A>?@3La9
return name[algorithm-1]; k1.h|&JJN
} K*QRi/O
QWncKE,O$
public static void sort(int[] data, int algorithm) { yhuzjn
impl[algorithm-1].sort(data); M:PEY*4H
} L?Fb}
H Q_IQ+
public static interface Sort { ++gWyzD
public void sort(int[] data); 762c`aP_(
} 6E)emFkQ
TJO?BX_9
public static void swap(int[] data, int i, int j) { GJ9'i-\*\
int temp = data; `K%f"by
data = data[j]; a'Vz|SG
data[j] = temp; ?LwBF;Y
} H(QbH)S$6
} K Y=$RO