[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\{uqv
} CLEG'bZa,
int i1=l; e:LZs0
int i2=mid+1; $ud>Z;X=P
for(int cur=l;cur<=r;cur++){ 1gm/{w6O
if(i1==mid+1) ~8t}*oV
data[cur]=temp[i2++]; l;*lPRoW,
else if(i2>r) 1bg@[YN!;
data[cur]=temp[i1++]; @$d\5Q(G
else if(temp[i1] data[cur]=temp[i1++]; i\;&CzC:
else `E=rh3 L0o
data[cur]=temp[i2++]; `^L<db^A
} \>Rwg=Lh
} .)>/!|i
N&APqT
} ]HV~xD7\
eCIRt/ uA
改进后的归并排序: npcBpGL{
D?}m h1#
package org.rut.util.algorithm.support; yvWzc uL#
~f10ZB_k>'
import org.rut.util.algorithm.SortUtil; \'+{X(]
i @9Qb
/** I"sobZ`
* @author treeroot W}k?gg=
* @since 2006-2-2 ,{?bM
* @version 1.0 ]ZGvRA&
*/ 0ITA3v8{
public class ImprovedMergeSort implements SortUtil.Sort { E#$_uZ4
pq?[wp"
private static final int THRESHOLD = 10; n,jE#Z.D
./nYXREO|
/* udD*E~1q
* (non-Javadoc) 7G[ GHc>
* #)mkD4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SKSAriS~
*/ A Ok7G?Y
public void sort(int[] data) { h0GdFWN
int[] temp=new int[data.length]; /P!X4~sTM
mergeSort(data,temp,0,data.length-1); wYQ1Z
} K-5"#
mXU?+G0
private void mergeSort(int[] data, int[] temp, int l, int r) { aI{@]hCo
int i, j, k; ~|Ih JzDt
int mid = (l + r) / 2; "aWX:WL&}s
if (l == r) ONN{4&7@<
return; |g\.5IM#W
if ((mid - l) >= THRESHOLD) #~URLN
mergeSort(data, temp, l, mid); ro&Y7m
else M-Z6TL
insertSort(data, l, mid - l + 1); $sc8)d\B
if ((r - mid) > THRESHOLD) y:|.m@ j1
mergeSort(data, temp, mid + 1, r); ?Y0$X>nm
else (2S!$w%
insertSort(data, mid + 1, r - mid); Gj7QGIKx
=*:[(Py1
for (i = l; i <= mid; i++) { Iz?Wtm }
temp = data; ay:\P.`5)
} NkA6Cp[Q,1
for (j = 1; j <= r - mid; j++) { h`EH~W0:z
temp[r - j + 1] = data[j + mid]; ;;y@z[ >
} 0^!,[oh6*
int a = temp[l]; i. u15$
int b = temp[r]; @0UwI%.
for (i = l, j = r, k = l; k <= r; k++) { 8?j&{G
if (a < b) { ;sL6#Go?V
data[k] = temp[i++]; QVSsi j
a = temp; /R(U>pZ
} else { 8g# Y
data[k] = temp[j--]; v[,v{5b
b = temp[j]; >^T,U0T])
} |P. =
} n$hqNsM
} HV*:<2P%D
vN0L(B
/** nF. ;LM
* @param data yo?g"vbE
* @param l &Qtp"#{
* @param i f=_Bx2ub
*/ b#Fk>j
private void insertSort(int[] data, int start, int len) { M=\d_O#;Z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (iCZz{l@~
} !8 wid&
} SA`J.4yn
} } `>J6y9
} ,WO%L~db
t7*G91Hoq&
堆排序： mq{$9@3
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package org.rut.util.algorithm.support; >uyeI&z
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import org.rut.util.algorithm.SortUtil; s=q%:uCO
sxN>+v11z
/** PtRj9TT
* @author treeroot 4[5lX C
* @since 2006-2-2 Sr ztTfY
* @version 1.0 g/U$!d_
*/ 9{9#AI.G
public class HeapSort implements SortUtil.Sort{ }j5R@I6P
/\,_P
/* (non-Javadoc) Io,/ +#|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kH>vD =q>
*/ d6t)gG*5
public void sort(int[] data) { I5TQ>WJbf
MaxHeap h=new MaxHeap(); u:AfHZ
h.init(data); .fLiXx
for(int i=0;i h.remove(); vy{rwZ$
System.arraycopy(h.queue,1,data,0,data.length); ]|C_`,ux
} 1*!c X
dr,B\.|jC
private static class MaxHeap{ D% v:PYf
FhY{;-W(T
void init(int[] data){ ]Efh(Gb]
this.queue=new int[data.length+1]; +?"HTDBE||
for(int i=0;i queue[++size]=data; #|{BGVp
fixUp(size); i_[ HcgT-
} Q8;x9o@p
} F1?CqN M
Ks49$w<
private int size=0; d$"G1u~%
jpYw#]Q
private int[] queue; fH#F"^A
g)Vq5en*
public int get() { "%.|n|
return queue[1]; =RW* %8C
} <t?x 'r?@
w2uRN?
public void remove() { ;S=62_Un
SortUtil.swap(queue,1,size--); m{:"1]
fixDown(1); dT0^-XSY
} vWqyZ-p,q
file://fixdown vI pO/m.3
private void fixDown(int k) { 3t"~F%4-}
int j; nR,Qm=;
while ((j = k << 1) <= size) { <O,'5+zG%
if (j < size %26amp;%26amp; queue[j] j++; ++Rdv0~
if (queue[k]>queue[j]) file://不用交换 M&|sR+$^
break; S4l)TtY
SortUtil.swap(queue,j,k); dJdD"xj
k = j; D_l/Gxdpr
} LCo1{wi
} Ht`<XbQ>
private void fixUp(int k) { M(;y~|e
while (k > 1) { %gV)arwK
int j = k >> 1; q;~R:}?@
if (queue[j]>queue[k]) bGGeg%7
break; 4B:\
SortUtil.swap(queue,j,k); &57qjA,8<
k = j; sowbg<D
} `!UaScM
} tIi!*u
U7nsMD
} pX>ua5Z
!XgQJ7y_Z
} FSW3'
o-\ok|,)#j
SortUtil： "?oo\op
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package org.rut.util.algorithm; %-h7Z3YcN
x\Nhix}1D
import org.rut.util.algorithm.support.BubbleSort; D 7Gd%
import org.rut.util.algorithm.support.HeapSort; L"""\5Bn(
import org.rut.util.algorithm.support.ImprovedMergeSort; $Qn&jI38
import org.rut.util.algorithm.support.ImprovedQuickSort; 9O),/SH;:
import org.rut.util.algorithm.support.InsertSort; g>6:CG"
import org.rut.util.algorithm.support.MergeSort; HO266M
import org.rut.util.algorithm.support.QuickSort; 4/*]`
import org.rut.util.algorithm.support.SelectionSort; Ep^B,;~
import org.rut.util.algorithm.support.ShellSort; Kwy1SyU
W9 n^T+2
/** ~fyF&+ibp'
* @author treeroot #@nZ4=/z
* @since 2006-2-2 Mq+viU&
* @version 1.0 C!$Xv&"r
*/ S[-.tvI;Q
public class SortUtil { ]sX7%3P
public final static int INSERT = 1; &M0o&C-1/
public final static int BUBBLE = 2; pd=7^"[};
public final static int SELECTION = 3; N; rXl8
public final static int SHELL = 4; b*lKT]D,
public final static int QUICK = 5; S9OxI$6Y
public final static int IMPROVED_QUICK = 6; hVlyEsLg
public final static int MERGE = 7; &E.OyqGZV
public final static int IMPROVED_MERGE = 8; PRMZfYc
public final static int HEAP = 9; 21.YO]Et
!&@2
public static void sort(int[] data) { 1P5*wNF
sort(data, IMPROVED_QUICK); ~GNyE*t/Y
} GYFgEg}
private static String[] name={ k TFz_*6.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fdd~e52f
}; NY~ dM\
w0#%AK
private static Sort[] impl=new Sort[]{ V[#6yMU@
new InsertSort(), II.<SC
new BubbleSort(), y.jS{r".
new SelectionSort(), QH& %mr.S
new ShellSort(), qsI{ b<n
new QuickSort(), |!$ Q<-]f
new ImprovedQuickSort(), p])D)FsMB
new MergeSort(), {&u Rd?(
new ImprovedMergeSort(), y' 2<qj
new HeapSort() cge-'/8w%
}; $`^H:Djr
DY$yiOH9
public static String toString(int algorithm){ PqTYAN&F
return name[algorithm-1]; b OW}"
} V78Mq:7d
x*:n4FZ7b
public static void sort(int[] data, int algorithm) { P1dN32H o
impl[algorithm-1].sort(data); !?yxh/>lM
} ^%-NPo<
G=vN;e_$_b
public static interface Sort { g<M0|eX@~
public void sort(int[] data); ?(]a*~rx
} C#Y,r)l
}%_qx|(P|t
public static void swap(int[] data, int i, int j) { HTxB=Q|
int temp = data; O:2 #_
data = data[j]; Tsu\oJ[
data[j] = temp; b21}49bHN
} k"t>He
} C,[L/!