[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; f&glY`s#
} `;-K/)/x
int i1=l; `}gjfu -'\
int i2=mid+1; vn@9Sqk
for(int cur=l;cur<=r;cur++){ cq`v8
if(i1==mid+1) B&&:A4
data[cur]=temp[i2++]; -QL_a8NL
else if(i2>r) {D1"bDZ
data[cur]=temp[i1++]; Ml1sE,BT
else if(temp[i1] data[cur]=temp[i1++]; `_C4L=q"
else 5v4 ,YHD
data[cur]=temp[i2++]; 42aYM!
} 9L;fT5Tp7
} C-/<5D j
1BK-uv:
} Xc;W9e(U
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改进后的归并排序: K'.aQ&2
VfOm#Ue0q
package org.rut.util.algorithm.support; +^n [B
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import org.rut.util.algorithm.SortUtil; )(`I1"1
gT$`a
/** iJE $3
* @author treeroot VdpwZ
* @since 2006-2-2 M<oIo036
* @version 1.0 ~G.'pyW
*/ iE$qq~%
public class ImprovedMergeSort implements SortUtil.Sort { m.ev~Vv~
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private static final int THRESHOLD = 10; MPx%#'Q
s86Ij>VLf
/* 6('2.^8
* (non-Javadoc) uc]]zI6
* -ju&"L B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1e.V%!Xk
*/ m,KG}KX
public void sort(int[] data) { /1ZRjf^
int[] temp=new int[data.length]; cl kL)7RQ
mergeSort(data,temp,0,data.length-1); Lu,72i0O ^
} Tg|0!0qD]F
9frLYJz"
private void mergeSort(int[] data, int[] temp, int l, int r) { !t/I j~o
int i, j, k; f QSP]?
int mid = (l + r) / 2; v< qN-zG
if (l == r) - Te+{
return; SoX\S|}%6[
if ((mid - l) >= THRESHOLD) lt\. )Y>4
mergeSort(data, temp, l, mid); F]kn4zr
else z97RNT|Y7U
insertSort(data, l, mid - l + 1); `R@1Sc<*|
if ((r - mid) > THRESHOLD) %fB]N
mergeSort(data, temp, mid + 1, r); Nv!If$d
else t]LOBy-Kv
insertSort(data, mid + 1, r - mid); !5lb+%7
"J|{'k`
for (i = l; i <= mid; i++) { (Tt\6-
temp = data; qyzmjV6J2
} ~R-P%l P
for (j = 1; j <= r - mid; j++) { j4h6p(w{
temp[r - j + 1] = data[j + mid]; o?zA'5q
} ,TL8`
int a = temp[l]; BEWDTOY[
int b = temp[r]; Lky<L96
for (i = l, j = r, k = l; k <= r; k++) { C;]}Ht:~I
if (a < b) { $m{-I=
data[k] = temp[i++]; UXpF$=
a = temp; \ vf&Ldk
} else { m,YBk<Bx
data[k] = temp[j--]; _p0@1 s(U
b = temp[j]; SVKjhZK
} bzYj`t?
} LYY3*d
} l*eJa38
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/** DJ)Q,l*|N9
* @param data MvV\?Lzj
* @param l f@Oi$9CZn
* @param i FI|jsO 3
*/ cQM_kV??!
private void insertSort(int[] data, int start, int len) { E6+c{41B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wD+4#=/j
} L\;n[,.
} k# -u!G
} ndW]S7
} _{$eOwB
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堆排序： ZSWKVTi
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package org.rut.util.algorithm.support; 'Lm\ r+$F
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import org.rut.util.algorithm.SortUtil; zsM3 [2E*
D@.+B`bA
/** ;W"=s79
* @author treeroot T$w`=7
* @since 2006-2-2 ))M!"*
* @version 1.0 \N3A2L)l
*/ \PU7,*2
public class HeapSort implements SortUtil.Sort{ Q`= ,&;T>
n:dnBwY
/* (non-Javadoc) :c03"jvYE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (rTn6[*
*/ lqaOLZH
public void sort(int[] data) { ,u.G6"<
MaxHeap h=new MaxHeap(); vGX L'k
h.init(data); M/?*?B
for(int i=0;i h.remove(); vca]yK<u
System.arraycopy(h.queue,1,data,0,data.length); ylTX
} r@WfZZ
]*/%5ZOI&
private static class MaxHeap{ sKu/VAh x
+g.lLb*#
void init(int[] data){ *I)F5M
this.queue=new int[data.length+1]; eHX;*~e6)
for(int i=0;i queue[++size]=data; |FED<
fixUp(size); 4eD>DW
} QYB66g:
} T~D2rt\
UO~Xzx!e
private int size=0; /9QC$Z):<
/&>vhpZ}
private int[] queue; X0FTD':f
8%\0v?a5
public int get() { Q}zd!*
return queue[1]; ~7;AV(\%e
} [N=v=J9
8?l/x
public void remove() { yq6Gyoi<
SortUtil.swap(queue,1,size--); !_i;6UVG
fixDown(1); ja2BK\"1:
} [H4)p ,R
file://fixdown _GW,9s^A
private void fixDown(int k) { 'lWgHmE
int j; #ULjK*)R
while ((j = k << 1) <= size) { qT153dNA&
if (j < size %26amp;%26amp; queue[j] j++; EX"o9'
if (queue[k]>queue[j]) file://不用交换 k`(Cwp{Oc
break; Kry^47"
SortUtil.swap(queue,j,k); L9}%tEP
k = j; IIh \d.o
} xq@_' 3X
} H*KZZTKd
private void fixUp(int k) { W ])Lc3X
while (k > 1) { JmBe1"hs
int j = k >> 1; ^.gBHZ
if (queue[j]>queue[k]) :iEIo7B
break; R!z32 <5k
SortUtil.swap(queue,j,k); `fM]3]x>
k = j; E7`Q=4@e
} \2#j1/d4
} xf|vz|J?y
jCK 0+,;
} 9er0Ww.d
Of gmJ(%
} x\K9|_!
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SortUtil： 'UFPQ
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package org.rut.util.algorithm; NK!#K>AO
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import org.rut.util.algorithm.support.BubbleSort; n4A#T#D!t3
import org.rut.util.algorithm.support.HeapSort; s`dwE*~
import org.rut.util.algorithm.support.ImprovedMergeSort; 9D`p2cO
import org.rut.util.algorithm.support.ImprovedQuickSort; YZ(tjIgQ
import org.rut.util.algorithm.support.InsertSort; ,t|qhJF
import org.rut.util.algorithm.support.MergeSort; Lk`,mjhk
import org.rut.util.algorithm.support.QuickSort; ~!7!Y~(+
import org.rut.util.algorithm.support.SelectionSort; iF^
import org.rut.util.algorithm.support.ShellSort; 4?',E ddo
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/** Xaw&41K
* @author treeroot d`sIgll&n
* @since 2006-2-2 kE[Hq-J=N
* @version 1.0 AAc*\K
*/ XCyAt;neon
public class SortUtil { %G>
public final static int INSERT = 1; :zK\t5
public final static int BUBBLE = 2; LUKt!I0l
public final static int SELECTION = 3; L43]0k
public final static int SHELL = 4; `)n/J+g
public final static int QUICK = 5; p%#=OtkC
public final static int IMPROVED_QUICK = 6; ZxoAf;U~
public final static int MERGE = 7; AYHefAF<w
public final static int IMPROVED_MERGE = 8; J`'wprSBb
public final static int HEAP = 9; h=o%\F4
p/ au.mc
public static void sort(int[] data) { Mh"vH0\Lj
sort(data, IMPROVED_QUICK); XtftG7r9S
} >k9W+mk
private static String[] name={ 5J2tR6u-(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fqm-?vy}
}; *5z"Xy3J
K06x7W
private static Sort[] impl=new Sort[]{ fl+dL#]
new InsertSort(), 9R3YUW}s
new BubbleSort(), %T,cR>lw
new SelectionSort(), tdOox87YK
new ShellSort(), COFCa&m9c
new QuickSort(), r 3FUddF'
new ImprovedQuickSort(), B#, TdP]/
new MergeSort(), EY}*}-3
new ImprovedMergeSort(), Z@gEJ^"yA"
new HeapSort() (Y~gItej
}; |0$7{nQ
`7 3I}%?
public static String toString(int algorithm){ JrGY`6##p
return name[algorithm-1]; hOR1RB
} xY@<<
J|@kF!6
public static void sort(int[] data, int algorithm) { ftRzgW);
impl[algorithm-1].sort(data); s0/y> ok
} Q7(I'
'tJ@+(tqw
public static interface Sort { vC%Hc/&.}
public void sort(int[] data); "7}e~*bM?`
} get$r5
)~C+nb '6/
public static void swap(int[] data, int i, int j) { It8s#oq8
int temp = data; -`ss7j&b3
data = data[j]; Co^GsUJ
data[j] = temp; 0I7 r{T
} cL^r^kL("
} I`uOsZBO/