[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; GqKsK r2%
} B 0ee?VC
int i1=l; 'gMfN
int i2=mid+1; ]wVk+%e
for(int cur=l;cur<=r;cur++){ ,)FdRRj
if(i1==mid+1) aA'TD:&p1
data[cur]=temp[i2++]; s5&@Cxzl
else if(i2>r) #*%q'gyHT
data[cur]=temp[i1++]; tY|8s]{2
else if(temp[i1] data[cur]=temp[i1++]; ~x:DXEV,
else G}d-(X
data[cur]=temp[i2++]; m#!=3P7T
} lUOvm\
} $md%xmQ[
c=O,;lWFqm
} w'Tq3-%V
&a0r%L()X
改进后的归并排序: g"VMeW^
23F/\2MSG
package org.rut.util.algorithm.support; u.XQ&
p=Q0!!_r
import org.rut.util.algorithm.SortUtil; TUK"nKSZ`.
wK_]/Q-L
/** Z8O n%Mx{"
* @author treeroot c}Z6V1]QP
* @since 2006-2-2 &[Xu!LP
* @version 1.0 fV>CZ^=G
*/ \nNXxTxX!
public class ImprovedMergeSort implements SortUtil.Sort { dihjpI_
}yn0IWVa
private static final int THRESHOLD = 10; tRb]7 z
1{x.xi"A/
/* Dim> 7Wbh
* (non-Javadoc) 4BL;FO
* #6v27:XK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uN*KHE+h
*/ ;bzX%f?|G
public void sort(int[] data) { F9"w6;hh
int[] temp=new int[data.length]; Ex amD">T
mergeSort(data,temp,0,data.length-1); _gj&$zP
} ;*TIM%6#
{$D,?V@%_
private void mergeSort(int[] data, int[] temp, int l, int r) { =ac_,]z
int i, j, k; tC?=E#3V
int mid = (l + r) / 2; C$h<Wt=<
if (l == r) HAzBy\M{
return; |077Sf|
if ((mid - l) >= THRESHOLD) 3rW|kkn
mergeSort(data, temp, l, mid); 'NjzgZ~]P
else 7,qYV}
insertSort(data, l, mid - l + 1); !^#jwRpeN
if ((r - mid) > THRESHOLD) C@ZK~Y_g
mergeSort(data, temp, mid + 1, r); 96cJ8I8
else PX:'/{V
insertSort(data, mid + 1, r - mid); #AkV/1Y
h0--B]f@
for (i = l; i <= mid; i++) { @}p2aV59
temp = data; 1J=.N|(@Q
} (/d5UIM{&
for (j = 1; j <= r - mid; j++) { 94uNI8
temp[r - j + 1] = data[j + mid]; }"vW4
} vy2Q g
int a = temp[l]; Y`7~Am/r;&
int b = temp[r]; j`'`)3f
for (i = l, j = r, k = l; k <= r; k++) { XgN` 7!Z
if (a < b) { h+p*=|j`
data[k] = temp[i++]; ,j;m!V
a = temp; )UgX3+@
} else { (s<Dd2&.H
data[k] = temp[j--]; ;7]u!Q
b = temp[j]; 5,qj7HZF
} _R'Fco
} '|]e<Mt-
} Q)m4_+,d
?&G`{Ey
/** E1dD7r\
* @param data ^'CPM6J
* @param l Xp\/YJOibd
* @param i <?-YTY|
*/ w{[=l6L m
private void insertSort(int[] data, int start, int len) { 4%4avEa"w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (fNUj4[
} v 8T$ &-HJ
} 'w>_+jLT
} #/"8F O%~p
} mpAR7AG6
W>r#RXmh
堆排序： ?]fF3SJk
2XTPBZNe
package org.rut.util.algorithm.support; qPB8O1fyU
tO7v4
import org.rut.util.algorithm.SortUtil; LTNj| u
3!Sp0P
/** :q8b;*:
* @author treeroot iHwLZ[O{
* @since 2006-2-2 UNijFGi
* @version 1.0 =PRx?q`d
*/ S)QAXjH
public class HeapSort implements SortUtil.Sort{ /,!qFt
pi=-#g(2
/* (non-Javadoc) Vd".u'r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b KTcZG
*/ tQZs.1=z
public void sort(int[] data) { E$W{8?:{
MaxHeap h=new MaxHeap(); Y2xL>F
h.init(data); @L.82p{h
for(int i=0;i h.remove(); Um1[sMc{au
System.arraycopy(h.queue,1,data,0,data.length); Z3>N<u8)
} WZOY)>K
l"\~yNgk
private static class MaxHeap{ ]k9)G*
j4?@(u9;j
void init(int[] data){ q@b|F-
this.queue=new int[data.length+1]; \V9Z#>
for(int i=0;i queue[++size]=data; -.g|l\
fixUp(size); NCxqh<
} RoCfJ65
} 0|R#Tb;Y
iXyO(w4D
private int size=0; <0yE 5Mrf
uOa26kE4
private int[] queue; C6O8RHg
??n*2s@t
public int get() { O+%WR
return queue[1]; W@yJAQ
} c/B'jPt
66^ycZCH
public void remove() { &1+X\c+tb
SortUtil.swap(queue,1,size--); '9c2Q/
fixDown(1); qwIa?!8o
} wApMzZ(X2y
file://fixdown _qbIh
private void fixDown(int k) { -n'F v@U
int j; )c l5B{1P
while ((j = k << 1) <= size) { >A0k 8T
if (j < size %26amp;%26amp; queue[j] j++; "NgoaG~!YO
if (queue[k]>queue[j]) file://不用交换 PrudhUI^
break; : tWU .f#
SortUtil.swap(queue,j,k); MxyN\Mq'
k = j; J8Yd1.Qj
} `%09xMPu
} A'G@uD@3
private void fixUp(int k) { +~xnXb1
while (k > 1) { &$`yo`
int j = k >> 1; DGevE~
if (queue[j]>queue[k]) ,f1q)Qf
break; >~K qg~
SortUtil.swap(queue,j,k); rDm'Z>nTf
k = j; jy]JiQB
} `DT3x{}_S
} 8k(P,o
upeU52@\
} Rb(SBa
>J|]moSVA
} a_h]?5 :c
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SortUtil： e" ]2=5g
%cE2s`
package org.rut.util.algorithm; ^<LY4^
R\XKMF3mN3
import org.rut.util.algorithm.support.BubbleSort; CgzD$`~
import org.rut.util.algorithm.support.HeapSort; y^]tahbo
import org.rut.util.algorithm.support.ImprovedMergeSort; u_7~TE3W
import org.rut.util.algorithm.support.ImprovedQuickSort; *>VVt8*Et
import org.rut.util.algorithm.support.InsertSort; lV.F,3
import org.rut.util.algorithm.support.MergeSort; ho>k$s?
import org.rut.util.algorithm.support.QuickSort; QdLYCR4f
import org.rut.util.algorithm.support.SelectionSort; VXR]"W=
import org.rut.util.algorithm.support.ShellSort; *xp\4;B
}E`dZW*!!
/** G;f/Tch
* @author treeroot ' oFxR003
* @since 2006-2-2 d|T!v
* @version 1.0 gocrjjAHk
*/ tK k#LWB
public class SortUtil { QXF aAb=(7
public final static int INSERT = 1; 5=e@d:Sz
public final static int BUBBLE = 2; WcC?8X2
public final static int SELECTION = 3; JWA@+u*k
public final static int SHELL = 4; p$ bnK]
public final static int QUICK = 5; [frq 'c
public final static int IMPROVED_QUICK = 6; ",{ibh)g$`
public final static int MERGE = 7; o[E_Ge}g8
public final static int IMPROVED_MERGE = 8; <(vCiH9~P
public final static int HEAP = 9; Q:ezifQ
6%Be36<
public static void sort(int[] data) { `GXkF:f=
sort(data, IMPROVED_QUICK); ?YeWH WM
} IF]lHB
private static String[] name={ Cuc$3l(%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Agrp(i"\@
}; kD[ r.Dma
eHDef
private static Sort[] impl=new Sort[]{ QJ|ap4r
new InsertSort(), e)E$}4
new BubbleSort(), w,Ee>cV]a
new SelectionSort(), .'a&33J
new ShellSort(), )]#aauC+
new QuickSort(), Z@Ae$ '9H
new ImprovedQuickSort(), b=3H
new MergeSort(), _,</1~.
new ImprovedMergeSort(), qH['09/F6
new HeapSort() `Y?87f:SP
}; <, 3ROo76
c^`]`xiX
public static String toString(int algorithm){ %7O?JI[
return name[algorithm-1]; uIU5.\"s
} ki>~H!zB
""Q1|
public static void sort(int[] data, int algorithm) { v`1,4,;,qs
impl[algorithm-1].sort(data); |a{Q0:
} GUQ{r!S
4Z|vnj)Z
public static interface Sort { ~SSU`
public void sort(int[] data); JF/,K"J
} 9M"].~iNE
l|5fE1K9U
public static void swap(int[] data, int i, int j) { 7^T^($+6s&
int temp = data; wW>)(&!F
data = data[j]; w\}?(uO
data[j] = temp; .CSS}4
} Ngg?@pG0y
} hVUP4 A