[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; ~)XyrKw
} u]K&H&AxT
int i1=l; 4NaL#3
int i2=mid+1; 7JvBzD42
for(int cur=l;cur<=r;cur++){ %l4LX~-:
if(i1==mid+1) kcg{z8cd'r
data[cur]=temp[i2++]; zO BLF|L=
else if(i2>r) j\kT H
data[cur]=temp[i1++]; `52+.*J+%
else if(temp[i1] data[cur]=temp[i1++]; \':'8:E
else ZS*PY,
data[cur]=temp[i2++]; ,%>]
} ,@mr})s
} ?RyeZKf
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} =P}ob eY
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改进后的归并排序: 9Z.Xo kg
7>#?-, B
package org.rut.util.algorithm.support; ZG29q>
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import org.rut.util.algorithm.SortUtil; TI^W=5W@@
}^!8I7J.
/** $T.uIq
* @author treeroot N8hiv'3
* @since 2006-2-2 I$.HG]
* @version 1.0 w$Zi'+&*
*/ vGe];
public class ImprovedMergeSort implements SortUtil.Sort { 0_F6t-
q~esxp
private static final int THRESHOLD = 10; Ass :
2a=3->D&
/* usj:I`>
* (non-Javadoc) >Q5et1c
* ?VUU[h8"v5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k!?sHUAj
*/ d}@b 3
public void sort(int[] data) { K/xn4N_UX
int[] temp=new int[data.length]; 99<]~,t=5
mergeSort(data,temp,0,data.length-1); Gw!VPFV>W
} sIUhk7Cd8
'%Cc!63t*
private void mergeSort(int[] data, int[] temp, int l, int r) { :1>h,NKC>
int i, j, k; ;a"g<v
int mid = (l + r) / 2; Yatd$`,hW
if (l == r) b 6kDkE
return; s7(NFX5
if ((mid - l) >= THRESHOLD) \wMqVRPoQ
mergeSort(data, temp, l, mid); 6T"4<w[
else ``X1xiB
insertSort(data, l, mid - l + 1); z$64Ep#
if ((r - mid) > THRESHOLD) +D7>$&BD
mergeSort(data, temp, mid + 1, r); x*H,eY3
else * {avx
insertSort(data, mid + 1, r - mid); 8 5 L<
V{jQ=<)@e
for (i = l; i <= mid; i++) { JRti2Mu
temp = data; R[#Np`z
} {5 V@O_*{
for (j = 1; j <= r - mid; j++) { |7Dc7p"D
temp[r - j + 1] = data[j + mid]; QZwUv<*
} C{{RU7iqc&
int a = temp[l]; 4S%s=vw
int b = temp[r]; _3Kow{y\
for (i = l, j = r, k = l; k <= r; k++) { Qy4eDv5
if (a < b) { eELLnU{"
data[k] = temp[i++]; {ef9ov Xk
a = temp; ]|m?pt
} else { nXU`^<nA
data[k] = temp[j--]; u[:-^H
b = temp[j]; YR'dl_
} V ,+&.A23
} ttP|}|O
} ! 3 ;;6
Vs1H)T%
/** 1k)31GEQw
* @param data 83(-/y
* @param l Z;ze{Vb
* @param i v(0IQ
*/ As{Q9o5j/
private void insertSort(int[] data, int start, int len) { e w%rc.;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !n`9V^`
} 7MbV|gM}
} i C)+5L#'
} "]SA4Ud^
} rF^H\U:w
.8%&K0
堆排序： &0b\E73
pyw]ydB
package org.rut.util.algorithm.support; (G6lr%d
X-4(oE
import org.rut.util.algorithm.SortUtil; iv!;gMco
+X%pUe
/** l;;,[xhq
* @author treeroot UuKW`(?^
* @since 2006-2-2 /4I9Elr
* @version 1.0 1La?x'{2MP
*/ xcQD]"
public class HeapSort implements SortUtil.Sort{ *Uw"`l
gB<1;_KW
/* (non-Javadoc) m2a[E0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZGw6Bd_I
*/ %!\iII
public void sort(int[] data) { +@^FUt=tq
MaxHeap h=new MaxHeap(); : uxJGx
h.init(data); (.J6>"K<
for(int i=0;i h.remove(); ).32Im!;#R
System.arraycopy(h.queue,1,data,0,data.length); 7VIfRN{5n
} &q7}HO/ @
Mdw"^x$7
private static class MaxHeap{ ~hxW3e
YB+My~fw{l
void init(int[] data){ x%yzhIRR
this.queue=new int[data.length+1]; ^:^
for(int i=0;i queue[++size]=data; "8$Muwm
fixUp(size); jX7;hQ+P
} swz)gh-*
} HIqe~Vc
}~v&
private int size=0; a9uMgx}
rDWwu'
private int[] queue; /EW=OZ/
Wh)>E!~9
public int get() { %oOSmt
return queue[1]; v t_lM
} P67*-Ki
,7I
public void remove() { "]bOpk T
SortUtil.swap(queue,1,size--); $ba*=/{[q
fixDown(1); >~l^E!<i-u
} #[&9~za'"m
file://fixdown (GoxiX l
private void fixDown(int k) { jL{k!V`s
int j; 84lT# ^q
while ((j = k << 1) <= size) { &s{d r
if (j < size %26amp;%26amp; queue[j] j++; U6F7dT
if (queue[k]>queue[j]) file://不用交换 3>v-,S+
break; c;,-I
SortUtil.swap(queue,j,k); b{CS1P
k = j; (sW$2a
} mKLWz1GZ
} cte Wl/v
private void fixUp(int k) { 12V-EG i
while (k > 1) { M_O)w^ '
int j = k >> 1; ~#dfZa&
if (queue[j]>queue[k]) *EPJeblAV
break; 6o1[fr
SortUtil.swap(queue,j,k); Y%!k'\n[2
k = j; {wl7&25
} 8{ +KNqz
} cpm *m"Nk
y5j ;Daq
} !<<wI'8
C{G;G@/7
} Byh!Snoe
.)E1|U[L
SortUtil： t9.| i H
7ju^B/7
package org.rut.util.algorithm; w5vzj%6i
DH"_.j
import org.rut.util.algorithm.support.BubbleSort; q>6RO2,
import org.rut.util.algorithm.support.HeapSort; GF36G?iEi
import org.rut.util.algorithm.support.ImprovedMergeSort; 5,BvT>zFY
import org.rut.util.algorithm.support.ImprovedQuickSort; y[/:?O}g4
import org.rut.util.algorithm.support.InsertSort; <OrQbrWQa
import org.rut.util.algorithm.support.MergeSort; h%5keiA
import org.rut.util.algorithm.support.QuickSort; 5S ) N&%
import org.rut.util.algorithm.support.SelectionSort; zCS&w ~
import org.rut.util.algorithm.support.ShellSort; F9>"1
.7+"KP:
/** '(zP;
* @author treeroot 09=w
* @since 2006-2-2 _U o3_us
* @version 1.0 w^ X@PpP
*/ /vPr^Wv
public class SortUtil { ,uD}1 G<u
public final static int INSERT = 1; [[O4_)?el
public final static int BUBBLE = 2; ;3iWV"&_A
public final static int SELECTION = 3; Q$5%9
public final static int SHELL = 4; 4WPco"xH!
public final static int QUICK = 5; j>5X^Jd
public final static int IMPROVED_QUICK = 6; dpT?*qLM
public final static int MERGE = 7; LlD=c
public final static int IMPROVED_MERGE = 8; w3;T]R*
public final static int HEAP = 9; RSx{Gbd4X
!/]z-z2>
public static void sort(int[] data) { y"iK)SH
sort(data, IMPROVED_QUICK); 94?/Rhs5
} h(i_'P?
private static String[] name={ S3Fj /2Q8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s~A:*2\
}; F5+!Gb En
a :CeI
private static Sort[] impl=new Sort[]{ OX}ZdM!&f
new InsertSort(), V"T5<HA9
new BubbleSort(), w6ck wn,
new SelectionSort(), 4 g8t
new ShellSort(), EL6<%~,V"I
new QuickSort(), _`Dz%(c
new ImprovedQuickSort(), \SBAk h
new MergeSort(), vvLzUxV
new ImprovedMergeSort(), `ghNS
new HeapSort() !>WW(n07Ma
}; H{uR+&<
,nWZJ&B
public static String toString(int algorithm){ ^[EXTBk@:
return name[algorithm-1]; u}7r\MnwK,
} .PCbGPbk
miV8jaV
public static void sort(int[] data, int algorithm) { ! QKec
impl[algorithm-1].sort(data); L>rW S-
} +D?Re%HI
uFG ;AY|
public static interface Sort { 0xV[C4E[6
public void sort(int[] data); ?SX0e(+}}
} 1]aya(
,w,)n^
public static void swap(int[] data, int i, int j) { AQPzId*z
int temp = data; 6-\C?w A
data = data[j]; N::.o+1
data[j] = temp; ,]4.|A_[Rq
} 1#x@
} lgC^32y