[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; 5M*:}*
} Wt~BU.
int i1=l; Vp@?^imL
int i2=mid+1; JYHl,HH#z
for(int cur=l;cur<=r;cur++){ }`m/bgtFX
if(i1==mid+1) Ao&"r[oJSv
data[cur]=temp[i2++]; YNsJZnGr8#
else if(i2>r) $kp{Eg '
data[cur]=temp[i1++]; hZt!/?dc
else if(temp[i1] data[cur]=temp[i1++]; NyNXP_8
else ' %o#q6O
data[cur]=temp[i2++]; :&."ttf=
} 8[{ Vu0R
} =fFP5e ['
sdw(R#GE
} =]0&i]z[.
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改进后的归并排序: BR;D@R``}
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package org.rut.util.algorithm.support; 3AN/ H
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import org.rut.util.algorithm.SortUtil; |Ds1
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/** PALc;"]O
* @author treeroot :,6\"y-
* @since 2006-2-2 aO4?m+
* @version 1.0 {;6`_-As%
*/ &6nWzF
public class ImprovedMergeSort implements SortUtil.Sort { ~oY^;/ j
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private static final int THRESHOLD = 10; ?^\|-Gr
sD#.Oq4&]y
/* .U]-j\
* (non-Javadoc) 49HZ2`Y
* pIqeXY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -PR N:'T
*/ v mk2{f,g
public void sort(int[] data) { r3UUlR/Do
int[] temp=new int[data.length]; &0JI!bR(
mergeSort(data,temp,0,data.length-1); k@W1-D?
} U&p${IcEm
`3&v6
private void mergeSort(int[] data, int[] temp, int l, int r) { 8FY?!C
int i, j, k; .,6-u
int mid = (l + r) / 2; -e:`|(Mo
if (l == r) P\k# >}}
return; c\AfaK^KF
if ((mid - l) >= THRESHOLD) ;u)I\3`*!
mergeSort(data, temp, l, mid); Lw>N rY(Y
else #S"nF@
insertSort(data, l, mid - l + 1); *gWwALGo5
if ((r - mid) > THRESHOLD) $-sHWYZ
mergeSort(data, temp, mid + 1, r); @E|}Y
else oXF.1f/h
insertSort(data, mid + 1, r - mid); #QMz<P/Gl6
)\$|X}uny&
for (i = l; i <= mid; i++) { 97!;.f-
temp = data; +52{-a,>
} $qj2w"'
for (j = 1; j <= r - mid; j++) { I b5rqU\
temp[r - j + 1] = data[j + mid]; Ig>(m49d
} Er?&Y,o
int a = temp[l]; /%io+94
int b = temp[r]; C;^X[x%h7$
for (i = l, j = r, k = l; k <= r; k++) { ~Z'?LV<t
if (a < b) { c{w2Gt!
data[k] = temp[i++]; qlPT Ll
a = temp; R4:b{)=O
} else { f) L
data[k] = temp[j--]; >~0Z& d
b = temp[j]; qUb&
} t"oeQ*d%
} I-l_TpM)
} &{t,'[ u
hp|YE'uYT
/** I%KYtv~`
* @param data e+fN6v5pU
* @param l ?%[jR=w
* @param i ?4T-@~~*`=
*/ ysY*k`5
private void insertSort(int[] data, int start, int len) { lL0APT;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); IJcsmNWm
} 6.yu-xm
} x7 ,5
} tc_3sC7jN
} - 1gVeT&
@f3E`8
堆排序： %d9uTm;
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package org.rut.util.algorithm.support; S3Jo>jXS "
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import org.rut.util.algorithm.SortUtil; mQ"-,mMI
pOoEI+t
/** DZtsy!xA
* @author treeroot dG?*y
* @since 2006-2-2 ]3Sp W{=^(
* @version 1.0 7WzxA=*#
*/ 7;@]t^d=$
public class HeapSort implements SortUtil.Sort{ /Lr.e%
+9sQZB# (
/* (non-Javadoc) [j+sC*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U8$27jq
*/ ~})e?q;b
public void sort(int[] data) { (X*^dO
MaxHeap h=new MaxHeap(); MkXmA`cP
h.init(data); Y(Hs#Kn{
for(int i=0;i h.remove(); 0?|<I{z2
System.arraycopy(h.queue,1,data,0,data.length); *.w9c
} Z6MO^_m2
O+x!Bg7
private static class MaxHeap{ +X 88;-
yyTnL 2Y9
void init(int[] data){ M x"\5i
this.queue=new int[data.length+1]; ;L ^o*`
for(int i=0;i queue[++size]=data; `r 4fm`<
fixUp(size); &s!@29DXR
} aV0"~5
} ]\HvKCN}
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private int size=0; 6[AL|d DK
KLk~Y0$:v
private int[] queue; [AJJSd/:
nQ3A~ ()
public int get() { :e+jU5;]3
return queue[1]; <<O$ G7c
} *wjrR1#81x
-M#Wt`6A
public void remove() { $M:*T.3
SortUtil.swap(queue,1,size--); C\hM =%
fixDown(1); i SQu#p@
} B&"Q\'c
file://fixdown -MBxl`JU
private void fixDown(int k) { [0("Q;Ec[j
int j; XW92gI<O
while ((j = k << 1) <= size) { 9H1rO8k
if (j < size %26amp;%26amp; queue[j] j++; ?:eV%`7
if (queue[k]>queue[j]) file://不用交换 as=fCuJ
break; %^6F_F_jS
SortUtil.swap(queue,j,k); {?7Uj
k = j; w_VP J
} 0JujesUw(
} Zx>=tx}
private void fixUp(int k) { "Z+k=~(
while (k > 1) { S$-7SEkO+
int j = k >> 1; ba9?(+i$h
if (queue[j]>queue[k]) ?:9"X$XR
break; 8zq=N#x
SortUtil.swap(queue,j,k); [{/jI\?v
k = j; #,'kXj
} lH~[f
} *lJxH8\
J]r^W)O
} m.0*NW
u:
} |k00Z+O(
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SortUtil： `uTmw^pZX
1G`Pmh@
package org.rut.util.algorithm; <wHP2|<l*
}Ou}+^Bc
import org.rut.util.algorithm.support.BubbleSort; +LJ73 !
import org.rut.util.algorithm.support.HeapSort; u)Whr@m
import org.rut.util.algorithm.support.ImprovedMergeSort; 8H`[*|{'
import org.rut.util.algorithm.support.ImprovedQuickSort; ;<4a*;IO
import org.rut.util.algorithm.support.InsertSort; <%mRSv
import org.rut.util.algorithm.support.MergeSort; 9;If&uM
import org.rut.util.algorithm.support.QuickSort; uhq8
import org.rut.util.algorithm.support.SelectionSort; akTk(
import org.rut.util.algorithm.support.ShellSort; 1k^oS$UT
?Q;=v~-Q
/** 2st3
* @author treeroot x.4m|f0;
* @since 2006-2-2 IdN41
* @version 1.0 U #0Cx-E
*/ 0PCGDLk8
public class SortUtil { \z)%$#I
public final static int INSERT = 1; B`sAk %
public final static int BUBBLE = 2; ?gXp*>Kg[
public final static int SELECTION = 3; a,o*=r
public final static int SHELL = 4; pTuS*MYz
public final static int QUICK = 5; QTnP'5y
public final static int IMPROVED_QUICK = 6; ksm~<;td
public final static int MERGE = 7; ,`sv1xwd
public final static int IMPROVED_MERGE = 8; I( Mm?9F
public final static int HEAP = 9; K@%].:
z{r}~{{E
public static void sort(int[] data) { HK%7g
sort(data, IMPROVED_QUICK); Pc]HP
} ^=*;X;7
private static String[] name={ ]I6 J7A[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &xExyz~`
}; A":T1s
@PIp*[7oC
private static Sort[] impl=new Sort[]{ 8xMX
new InsertSort(), c+GG\:gM
new BubbleSort(), Ni7nq8B<
new SelectionSort(), -I%5$`z
new ShellSort(), rSNi@;
new QuickSort(), c[s4EUG
new ImprovedQuickSort(), wKY_Bo/d
new MergeSort(), $Ygue5{c
new ImprovedMergeSort(), *OQ2ucC8j
new HeapSort() "EJ~QCW*Yh
}; -ze J#B)C
x|29L7i
public static String toString(int algorithm){ CU~PT.
return name[algorithm-1]; MUwMb!Z.s
} onV>.7sG
Fs^Mw go
public static void sort(int[] data, int algorithm) { Y|/ 8up
impl[algorithm-1].sort(data); VS|2|n1<6
} DIUjn;>k8
o,wUc"CE
public static interface Sort { 7mfS*aCb
public void sort(int[] data); 'E.w=7z&
} f<6lf7qzC
L4l!96]a
public static void swap(int[] data, int i, int j) { #|``ca54B
int temp = data; /wlEe>i
data = data[j]; B|X!>Q<g
data[j] = temp; -%4,@ x`
} {7pli{`
} ,wPr"U+7