[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; 2 w2JFdm
} Dz4fP;n
int i1=l; ~l~ai>/
int i2=mid+1; }xcEWC\
for(int cur=l;cur<=r;cur++){ DW^E46k)A
if(i1==mid+1) t =ErJ
data[cur]=temp[i2++]; LEoL6ga
else if(i2>r) N`7) 88>w
data[cur]=temp[i1++]; >E&mNp
else if(temp[i1] data[cur]=temp[i1++]; \vVGfG?6
else zmH8#
data[cur]=temp[i2++]; kK]JN
} /xmUu0H$R
} >1[Hk0 <x
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} wV- kB4^4
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改进后的归并排序: 9*gD;)!
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package org.rut.util.algorithm.support; E\2|
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import org.rut.util.algorithm.SortUtil; FI1R7A
q(0V#kKC
/** hX\z93an
* @author treeroot eqK6`gHa6
* @since 2006-2-2 B[:-SWd
* @version 1.0 w)o^?9T
*/ d(RSn|[0
public class ImprovedMergeSort implements SortUtil.Sort { u|l]8T9L
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private static final int THRESHOLD = 10; !ydJ{\;
l$$N~FN
/* VU7x w
* (non-Javadoc) kH Y
* $+eDoI'f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^&iUC&8W
*/ +Z0@z^6\
public void sort(int[] data) { ,/n<Qg"`
int[] temp=new int[data.length]; <X}@afS
mergeSort(data,temp,0,data.length-1); L4I1nl
} zG|}| //}
iGmBG1a\
private void mergeSort(int[] data, int[] temp, int l, int r) { -=aI!7*"$
int i, j, k; *k:Sg*neVq
int mid = (l + r) / 2; RX.n7Tb
if (l == r) trL:qD+{(
return; UTw f!
if ((mid - l) >= THRESHOLD) HMbF#!E
mergeSort(data, temp, l, mid); V3O<l}ak
else ^v.~FFK
insertSort(data, l, mid - l + 1); X(F2 5
if ((r - mid) > THRESHOLD) W]p)}#FR
mergeSort(data, temp, mid + 1, r); 0\f3La
else Vt-D8J\A 0
insertSort(data, mid + 1, r - mid); kIS_6!
$ BV4i$
for (i = l; i <= mid; i++) { :hYV\8$
temp = data; z-*/jFE
} .Cfi/
for (j = 1; j <= r - mid; j++) { n:cre}0.
temp[r - j + 1] = data[j + mid]; SXn\k;F<
} @l~zn%!X
int a = temp[l]; |) {)w`
int b = temp[r]; s u]x
for (i = l, j = r, k = l; k <= r; k++) { J1kG'cH05
if (a < b) { )8Defuxk
data[k] = temp[i++]; J%c4-'l
a = temp; '1]Iu@?
} else { JiL%1y9|
data[k] = temp[j--]; Pl4$`Qw#y
b = temp[j]; OM,-:H,
} B>, O@og
} Op^r}7
} $OK}jSH*v)
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/** a=3?hVpB
* @param data /*DC`,q
* @param l rJ)O(
* @param i AZ~=]1
*/ =H&@9=D*
private void insertSort(int[] data, int start, int len) { ?k)(~Y&@p
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Yoy}Zdu}h
} _Wn5* Pi%Z
} -gZI^EII
} U JO
} P+r-t8
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堆排序： uXPvl5(Y?
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package org.rut.util.algorithm.support; ;2X/)sxWz
h^#K4/
import org.rut.util.algorithm.SortUtil; yZJR7+
wmh[yYWc
/** :|i jCg+
* @author treeroot umV5Y`
* @since 2006-2-2 / 0Z_$Q&e
* @version 1.0 cX'&J_T+
*/ c%,~1l
public class HeapSort implements SortUtil.Sort{ *G)=6\
jFYv4!\ju
/* (non-Javadoc) %,Fx qw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ][R#Q;y<
*/ NQCJ '%L6
public void sort(int[] data) { wIT0A-Por4
MaxHeap h=new MaxHeap(); NYbeIfL
h.init(data); 4#H~g @
for(int i=0;i h.remove(); K1c@]]y)
System.arraycopy(h.queue,1,data,0,data.length); TqURYnNd
} rdd%"u+
SenDJv00
private static class MaxHeap{ 8':^tMd
=sVB.P
void init(int[] data){ F6 ?4E"d
this.queue=new int[data.length+1]; ,#Y>nP0
for(int i=0;i queue[++size]=data; 595P04
fixUp(size); J6}J/
} 'Dl31w%:
} (vHB`@x
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private int size=0; RM2<%$
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private int[] queue; :p^7XwX%w
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public int get() { XBi}hT
return queue[1]; Gb]t%\
} nRKh|B)
4?GW]'d
public void remove() { W|S{v7[l
SortUtil.swap(queue,1,size--); &sJZSrk|
fixDown(1); M7rVH\:[-
} Ic_>[E?k
file://fixdown (h;4irfX
private void fixDown(int k) { /$v0Rq9
int j; `4V_I%lJ&
while ((j = k << 1) <= size) { $ K>.|\
if (j < size %26amp;%26amp; queue[j] j++; y#-mj,e
if (queue[k]>queue[j]) file://不用交换 OmO/x
break; 9Yg=4>#$
SortUtil.swap(queue,j,k); I8=p_Ie
k = j; Si[:l
} FF]xwptrx
} -z"=d<@
private void fixUp(int k) { Vo*38c2
while (k > 1) { ^^MVd@,i
int j = k >> 1; Lw EI
if (queue[j]>queue[k]) +D ,Nd=/
break; Y0`=h"g
SortUtil.swap(queue,j,k); \%fl`+`
k = j; EMyMed_
} "/v{B?~%!
} ~4HS 2\
*z-Mr~V
} 'urn5[i
Jr/|nhGl5
} 4N&4TUIM
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SortUtil： a`XXz
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package org.rut.util.algorithm; tz{W69k+
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import org.rut.util.algorithm.support.BubbleSort; /(#;(]
import org.rut.util.algorithm.support.HeapSort; gWcl@|I;\
import org.rut.util.algorithm.support.ImprovedMergeSort; yEm[C(gZ
import org.rut.util.algorithm.support.ImprovedQuickSort; $f`\TKlN
import org.rut.util.algorithm.support.InsertSort; mx`C6G5
import org.rut.util.algorithm.support.MergeSort; 4c"x&x|
import org.rut.util.algorithm.support.QuickSort; zqqu7.`
import org.rut.util.algorithm.support.SelectionSort; vMBF7Jfx
import org.rut.util.algorithm.support.ShellSort; ?2D1gjr
D@:w/W
/** C(( 7
* @author treeroot sB|>\O#-
* @since 2006-2-2 rVU::C+-
* @version 1.0 wBr$3:
*/ iC]=S}
public class SortUtil { FGzMbi<l#(
public final static int INSERT = 1; BJzNh>-#=
public final static int BUBBLE = 2; e))fbv&V
public final static int SELECTION = 3; 3K Y-+ k
public final static int SHELL = 4; .<Y7,9;YEF
public final static int QUICK = 5; 1k&**!S]%
public final static int IMPROVED_QUICK = 6; qcYF&
public final static int MERGE = 7; y%* hHnGd
public final static int IMPROVED_MERGE = 8; YKF5|;}
public final static int HEAP = 9; H=2sT+Sp
gJYB)LjH"
public static void sort(int[] data) { e C\;n
sort(data, IMPROVED_QUICK); 2%0J/]n\A"
} PGTi-o}
private static String[] name={ {pEay|L_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" m0I/X$-Cl5
}; O>P792)
)TNAgTmqK
private static Sort[] impl=new Sort[]{ @f<q&K%FJ
new InsertSort(), <pAN{:
new BubbleSort(), y7[D9ZvZ
new SelectionSort(), !/pE6)a
new ShellSort(), t?& a?6:J
new QuickSort(), 1=fP68n
new ImprovedQuickSort(), -rC_8.u :
new MergeSort(), KMFvi_8
new ImprovedMergeSort(), RzPqtN
new HeapSort() *;(wtMg
}; r`? bYoz
U/v }4b
public static String toString(int algorithm){ tbbZGyg5b
return name[algorithm-1]; v(uYso_
} v;=F$3
6y;R1z b
public static void sort(int[] data, int algorithm) { bUR;d78
impl[algorithm-1].sort(data); O3Jp:.ps
} yXg #<H6V
DI/yHs
public static interface Sort { 5i 56J1EC
public void sort(int[] data); CxyL'k
} 4~;x(e@S
@m*^v\q<u
public static void swap(int[] data, int i, int j) { J!l/!Z>!cF
int temp = data; }=)
data = data[j]; zCOzBL/1q
data[j] = temp; g\%vkK&I
} D]NfA2B7
} eUa2"=M