[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; $v&C@l \
} |QYZRz
int i1=l; jKt-~:
int i2=mid+1; &tBA^igXK
for(int cur=l;cur<=r;cur++){ R<&FhT]
if(i1==mid+1) $Xt;A&l2?
data[cur]=temp[i2++]; A^pW]r=Xtk
else if(i2>r) u(9X
data[cur]=temp[i1++]; UD*+"~
else if(temp[i1] data[cur]=temp[i1++]; ]V<"(?,K
else :o\5K2]:
data[cur]=temp[i2++]; B T7Id
} Qq0O0U
} E/"SU*Co
``-k{C#F
} ^g]xU1] *
IIP.yyh>
改进后的归并排序: 2Guvze_bU
<|JU(B
package org.rut.util.algorithm.support; A70(W{6a9@
_<u;4RO(s
import org.rut.util.algorithm.SortUtil; >-<F)
Yq0# #__
/** VG\mo?G
* @author treeroot 6F ;Or
* @since 2006-2-2 LVmY=d>
* @version 1.0 N*1
*/ *tG11gR,&
public class ImprovedMergeSort implements SortUtil.Sort { {&`VGXG
n!?r }n8
private static final int THRESHOLD = 10; 6PJ'lA;*b
Doj(.wm~
/* :)LC gIQo
* (non-Javadoc) 66dTs,C
* ;Id"n7W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I7bi@t
*/ 7sguGwg)_
public void sort(int[] data) { N(7u],(Om
int[] temp=new int[data.length]; 8bbVbP
mergeSort(data,temp,0,data.length-1); `$Kes;[X
} _FFv#R*4
&E]"c]i+
private void mergeSort(int[] data, int[] temp, int l, int r) { {_Np<r;j<
int i, j, k; |`v^d|
int mid = (l + r) / 2; \P?--AIq<
if (l == r) @WJf)
return; dgY5ccP
if ((mid - l) >= THRESHOLD) ecT]p
mergeSort(data, temp, l, mid); s[Gswd
else <)J55++
insertSort(data, l, mid - l + 1); Re\o v x9
if ((r - mid) > THRESHOLD) }6@%((9E2
mergeSort(data, temp, mid + 1, r); W+/2c4$F3
else w<mqe0
insertSort(data, mid + 1, r - mid); VwC4QK,d;
fr]Hc+7
for (i = l; i <= mid; i++) { UhBz<>i;!
temp = data; #8&#E?^d
} Hi7G/2t@`
for (j = 1; j <= r - mid; j++) { d1lH[r!Z
temp[r - j + 1] = data[j + mid]; lux9o$ %
} rxArTpS{.#
int a = temp[l]; X_!$Pk7ma
int b = temp[r]; _;VYFs
for (i = l, j = r, k = l; k <= r; k++) { }Oh5Nm)
if (a < b) { _]_LF[
data[k] = temp[i++]; 'Dq"e$JM<
a = temp; O E]~@eU
} else { CL )%p"[x
data[k] = temp[j--]; _UaPwJ
b = temp[j]; 5Ny0b|+p
} (Y>U6
} ) _#T c
} |/t K-c6J
b2W;|
/** J:[3;Z
* @param data @NBXyC8,Z
* @param l E~qK&7+
* @param i [@zkv)D6
*/ )Jmw|B
private void insertSort(int[] data, int start, int len) { 8vu2k>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); gMCy$+?
} m/cx|b3hqv
} % ghJ*iHR
} nWd:>Ur
} rC~_:uXtE
YqkA&qL]#;
堆排序： @RQ+JYQi
:E}6S
package org.rut.util.algorithm.support; &(GopWR`e
YALyZ.d
import org.rut.util.algorithm.SortUtil; w:n(pLc<
Un~]Q?w
/** z)r8?9u
* @author treeroot \gjl^#;
* @since 2006-2-2 xMLrLXy
* @version 1.0 bW}b<(y
*/ ya;@<b
public class HeapSort implements SortUtil.Sort{ `AB~YX%(
'! #On/
/* (non-Javadoc) L,tZh0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "Fo
*/ rE9Ta8j6
public void sort(int[] data) { .Ydr[
MaxHeap h=new MaxHeap(); @^BS#
h.init(data); 2J1B$.3'
for(int i=0;i h.remove(); `NTM%# w
System.arraycopy(h.queue,1,data,0,data.length); Z^6A_:]j
} Q=dw 6
oA5<[&~<
private static class MaxHeap{ -wJ
ccIDMJ=2
void init(int[] data){ 6hR^qdHg
this.queue=new int[data.length+1]; '3IkPy1Uz
for(int i=0;i queue[++size]=data; *1%e%G
fixUp(size); @#'yPV1
} z&\Il#'\m+
} uv?8V@x2
x;<oaT$X
private int size=0; <|ka{=T
I3V{"Nx6
private int[] queue; c8H9_6
2(@LRl>:
public int get() { nYmf(DV
return queue[1]; mrw]yu;2<n
} 8') .ohD
};4pZceV
public void remove() { "TEBByO'
SortUtil.swap(queue,1,size--); W9:fKP
fixDown(1); $K5ni{M;
} 7[(Lrx.pM
file://fixdown * [iity
private void fixDown(int k) { `two|gX0K
int j; o6`Y7,]
while ((j = k << 1) <= size) { FF5tPHB
if (j < size %26amp;%26amp; queue[j] j++; 6:e}v'q{
if (queue[k]>queue[j]) file://不用交换 z_5rAlnwT.
break; WV5r$
SortUtil.swap(queue,j,k); |_xZ/DT
k = j; ]b5%?^Z#
} m~A[V,os
} R (+h)#![
private void fixUp(int k) { =vB]*?;9
while (k > 1) { 3tJ=d'U
int j = k >> 1; F5:2TEA
if (queue[j]>queue[k]) T)$6H}[c
break; Z1XUYe62
SortUtil.swap(queue,j,k); R!:eYoQ
k = j; OqAh4qa,$
} m70`{-O
} yf0vR%,\
K|P9uHD
} uK+9gTv
iX0]g45o
} }z9I`6[
a>;3 j
SortUtil： ]{q-Y<{"
Y^*Lh/:h
package org.rut.util.algorithm; A&X
%OezaNOtm
import org.rut.util.algorithm.support.BubbleSort; duZ|mT8Q==
import org.rut.util.algorithm.support.HeapSort; r_qncy,F
import org.rut.util.algorithm.support.ImprovedMergeSort; ^=4I|+P,6.
import org.rut.util.algorithm.support.ImprovedQuickSort; {ziYd;Ys1
import org.rut.util.algorithm.support.InsertSort; =rf)yp-D
import org.rut.util.algorithm.support.MergeSort; (Von;U
import org.rut.util.algorithm.support.QuickSort; W>aQ tT
import org.rut.util.algorithm.support.SelectionSort; s= -WB0E
import org.rut.util.algorithm.support.ShellSort; i} NkHEK
E< io^
/** Mo:!jS~a(Z
* @author treeroot E-BOIy,
* @since 2006-2-2 0XBBA0tq
* @version 1.0 E.zYi7YUKK
*/ XZUB*P}]D
public class SortUtil { /h}wM6pg
public final static int INSERT = 1; ,u8ZS|9
public final static int BUBBLE = 2; T2/v}
public final static int SELECTION = 3; 46Y7HTwE
public final static int SHELL = 4; 0{U]STj
public final static int QUICK = 5; @M1yBN
public final static int IMPROVED_QUICK = 6; &CxyP_
public final static int MERGE = 7; 2Q`PUXj
public final static int IMPROVED_MERGE = 8; y4)ZUv,}
public final static int HEAP = 9; A$H+4L
vkNZ -`+I
public static void sort(int[] data) { IxK 3,@d
sort(data, IMPROVED_QUICK); ZYl-p]\*y
} 6I5[^fv45G
private static String[] name={ )Ta]6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?vL^:f["
}; }5fI*v
)Bm^aMVl3
private static Sort[] impl=new Sort[]{ f//j{P[
new InsertSort(), oJ4mxi@|#
new BubbleSort(), )|59FOWg
new SelectionSort(), 5W:Gl?$S}
new ShellSort(), sTYuwna~
new QuickSort(), U:etcnb4w>
new ImprovedQuickSort(), RpaA)R,
new MergeSort(), b6?Xo/lJ.
new ImprovedMergeSort(), eJVOVPg<,
new HeapSort() Z7KB?1{G
}; b& _i/n(
~PH1|h6
public static String toString(int algorithm){ E:dT_x<Y
return name[algorithm-1]; #Kb)>gzT
} I2Or& _
7DHT)9lD/
public static void sort(int[] data, int algorithm) { |aOnV,}
impl[algorithm-1].sort(data); nCSd:1DY
} D/!eov4"
Js^r]=\F'
public static interface Sort { @Z=y'yc'y.
public void sort(int[] data); -67f33
} {_k!!p6
7Da^Jv k
public static void swap(int[] data, int i, int j) { (`uC"MLk
int temp = data; o<Rxt *B
data = data[j]; ,Rr&.
data[j] = temp; }ii]cY
} E%J7jA4
} e) /u>I