[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; \5}PF+)|
} Bdh*[S\u@E
int i1=l; h:pgN,W}
int i2=mid+1; PNAvT$0LaZ
for(int cur=l;cur<=r;cur++){ rmw}Ui"
if(i1==mid+1) 2Di~}*9&
data[cur]=temp[i2++]; ByjfPb#
else if(i2>r) ]B(}^N>WH
data[cur]=temp[i1++]; 3|$?T|#B
else if(temp[i1] data[cur]=temp[i1++]; RgoF4g+@
else i%133in
data[cur]=temp[i2++]; L?u{vX
} "-S!^h/v
} h:Gs9]Lvtv
+iN!$zF5]
} x}a?B
Z|@-=S(.
改进后的归并排序: i-0 :Fs
%. ((4 6)
package org.rut.util.algorithm.support; ;,U@zB;\%(
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import org.rut.util.algorithm.SortUtil; E*)A!2rlK
a'`i#U
/** xqk(id\&
* @author treeroot ]kNxytH\o
* @since 2006-2-2 hRuiuGC
* @version 1.0 !m\By%(
*/ 6p;Pf9 f
public class ImprovedMergeSort implements SortUtil.Sort { ;0_T\{H"nR
%pg)*>P h
private static final int THRESHOLD = 10; Z=-#{{bv
AIl`>ac
/* TCzz]?G]la
* (non-Javadoc) 0 F8xS8vK+
* kN 2mPD/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <*iFVjSI(
*/ C|H`.|Q
public void sort(int[] data) { a.u{b&+9
int[] temp=new int[data.length]; ~jKIuO/
mergeSort(data,temp,0,data.length-1); \Yp"D7:Qi
} t#M[w|5?
OtL~NTY
private void mergeSort(int[] data, int[] temp, int l, int r) { 7y&=YCkc7
int i, j, k; O^c?w8
int mid = (l + r) / 2; u@Gum|_=N
if (l == r) J8FzQ2
return; :6C R~p
if ((mid - l) >= THRESHOLD) oBai9 [+
mergeSort(data, temp, l, mid); XH0{|#hwN
else d+P<ce2G
insertSort(data, l, mid - l + 1); uF%N`e^S
if ((r - mid) > THRESHOLD) \zcSfNE
mergeSort(data, temp, mid + 1, r); fc:87ZR{K
else dh}"uM}a
insertSort(data, mid + 1, r - mid); L9hL@
_j$V[=kdM/
for (i = l; i <= mid; i++) { ,f>^q"
temp = data; b%F'Ou~
} fm^tU0DY
for (j = 1; j <= r - mid; j++) { n}%_H4t
temp[r - j + 1] = data[j + mid]; k!qOE\%B
} GXx'"SK9
int a = temp[l]; d?U,}tv
int b = temp[r]; fX:G;vYn
for (i = l, j = r, k = l; k <= r; k++) { Lo'GfHE
if (a < b) { ~&0lWa
data[k] = temp[i++]; x6T$HN/2
a = temp; %xx;C{g;a
} else { LfnQcI$kO
data[k] = temp[j--]; /;TD n>lq
b = temp[j]; %LdBO1D0
} mV7_O//
} Q\~#cLJ/
} ieEtC,U
ENYc.$r
/** UQ e1rf
* @param data GYT0zMMf
* @param l y#ON=8l
* @param i ' z^v}~
*/ T/L\|_:'
private void insertSort(int[] data, int start, int len) { ]~m=b`o
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m&*0<N
} UBwYwm0
} BhyLcUBuB
} PwAmnk !
} a<pEVV\NB~
A[88IMZs
堆排序： GO#eI]>/r
w `M/0.)V
package org.rut.util.algorithm.support; ,;= S\
iQh:y:Jo1&
import org.rut.util.algorithm.SortUtil; p{V(! v|
Y^?PHz'Go
/** R'1"`@fG
* @author treeroot ^> d"D
* @since 2006-2-2 Zg])uM]\2i
* @version 1.0 Q|Pm8{8
*/ dI,H:g
public class HeapSort implements SortUtil.Sort{ G~lnX^46"
Fw#wVs)@:
/* (non-Javadoc) xNVSWi,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n<[H!4
*/ -fz(]d
public void sort(int[] data) { {>&M:_`k
MaxHeap h=new MaxHeap(); 'xOH~RlE
h.init(data); :)Nk
for(int i=0;i h.remove(); >&qaT*_g
System.arraycopy(h.queue,1,data,0,data.length); #b=*hi`E
} :rmi8!o
_ZuI x=!
private static class MaxHeap{ zy9W{{:P(1
GsWf$/iC:
void init(int[] data){ BI6`@}%7>
this.queue=new int[data.length+1]; na/,1iI<
for(int i=0;i queue[++size]=data; 7 (i\?
fixUp(size); # f{L;
} jAFJ?L(
} 7mS_Cz+cB
-uK@2}NZ
private int size=0; ubi6=
Gc!&I+kd
private int[] queue; '^t(=02J
H!g9~a
public int get() { 4kLTKm:G
return queue[1]; Uv3Fe%>
} ~!dO2\X+
(7PVfS>;
public void remove() { E+aE5wmr
SortUtil.swap(queue,1,size--); Luh*+l-nO
fixDown(1); y=WCR*N
} p["20?^
file://fixdown B\7 80p<
private void fixDown(int k) { t4,(W`
int j; FE?^}VH
while ((j = k << 1) <= size) { k$K>ml/h
if (j < size %26amp;%26amp; queue[j] j++; YcuHYf5
if (queue[k]>queue[j]) file://不用交换 k{C|{m
break; )0@&pEObm
SortUtil.swap(queue,j,k); w3oe.hWP3N
k = j; {[FJkP2l
} 8F`799[p
} }KL( -Ui$
private void fixUp(int k) { jowR!rqf
while (k > 1) { ZltY_5l
int j = k >> 1; ~D Ta%J
if (queue[j]>queue[k]) QcDtZg\
break; 8J#TP7;
SortUtil.swap(queue,j,k); HFf9^
k = j; ![@\p5-e
} FkIT/H
} NY~y:*:Q
"/U~j4O
} ,`l8KRd
_;5N@2?
} gNo}\ lm4V
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SortUtil： _M}}H3
|/p2DU2
package org.rut.util.algorithm; '4d+!%2t
q1o)l
import org.rut.util.algorithm.support.BubbleSort; \wo'XF3:
import org.rut.util.algorithm.support.HeapSort; IDv|i.q3
import org.rut.util.algorithm.support.ImprovedMergeSort; s av
import org.rut.util.algorithm.support.ImprovedQuickSort; aruT eJF
import org.rut.util.algorithm.support.InsertSort; 0--0+?
import org.rut.util.algorithm.support.MergeSort; >5=uq _QY
import org.rut.util.algorithm.support.QuickSort; <</ Le%
import org.rut.util.algorithm.support.SelectionSort; I!-5 #bxD
import org.rut.util.algorithm.support.ShellSort; FiJU *
.1& F p
/** 0(dXU\Y
* @author treeroot 5l(Q#pSX
* @since 2006-2-2 ) bGzsb1\
* @version 1.0 q\6ZmKGnT
*/ Lv?e[GA
public class SortUtil { 0E#3XhU
public final static int INSERT = 1; -J=N
public final static int BUBBLE = 2; rn8t<=ptH3
public final static int SELECTION = 3; #>\+6W17U
public final static int SHELL = 4; v5o@ls
public final static int QUICK = 5; VjVL/SO/
public final static int IMPROVED_QUICK = 6; %7bZnK`C
public final static int MERGE = 7; ]):kMRv
public final static int IMPROVED_MERGE = 8; <oWoJP`G
public final static int HEAP = 9; DN;An0 {MK
?rgk
public static void sort(int[] data) { ^aG=vXK`b
sort(data, IMPROVED_QUICK); gkyv[
} &-0eWwMW
private static String[] name={ {$mj9?n=v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" i.`RQZ$,/
}; SLG3u;Ab
D#,P-0+%
private static Sort[] impl=new Sort[]{ l6EDl0~r
new InsertSort(), LAwAFma>
new BubbleSort(), %@d~)f
new SelectionSort(), *aF<#m v
new ShellSort(), :X6A9jmd
new QuickSort(), $VCWc#
new ImprovedQuickSort(), C7[CfcPA
new MergeSort(), =-qv[;%&6
new ImprovedMergeSort(), #I.Wmfz
new HeapSort() o!+jPwEU
}; &ii3Vlyzg
`cgSyRD]
public static String toString(int algorithm){ )0:@T)G
return name[algorithm-1]; T;%ceLD
} to
'j+J?Y^
public static void sort(int[] data, int algorithm) { U\A*${
impl[algorithm-1].sort(data); -IB~lw
} Rg6e7JVu
'nM)=
public static interface Sort { ei8OLcw:x
public void sort(int[] data); 85fBKpEe
} wb }W;C@
x-_!I>l&
public static void swap(int[] data, int i, int j) { An e.sS
int temp = data; i+V4_`
data = data[j]; vO)nqtw
data[j] = temp; 2ajQ*aNq
} Y`u.P(7#
} q)uq?sZe