[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; Ro-Mex2
} .fjM9G#
int i1=l; a3O_8GU
int i2=mid+1; K] Eq"3
for(int cur=l;cur<=r;cur++){ sS-5W-&P{T
if(i1==mid+1) mD)Nh
data[cur]=temp[i2++]; 8<]>q
else if(i2>r) a?JU(
data[cur]=temp[i1++]; /u #9M {
else if(temp[i1] data[cur]=temp[i1++]; B1LnuB%
else *\joaw
data[cur]=temp[i2++]; l,v:[N
} Qy6Avw/$
} RIJBHOa
q!AS}rV
} iz*aBXVA[
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改进后的归并排序: H<NYm#a"
wV-cpJ,}
package org.rut.util.algorithm.support; Z&.FJZUP
*E$D,
import org.rut.util.algorithm.SortUtil; Zb9@U: \
}(hE{((o
/** +i)1 jX<
* @author treeroot ^ g4)aaBZ
* @since 2006-2-2 Y^6=_^
* @version 1.0 :_e.ch:4
*/ ax3:rl
public class ImprovedMergeSort implements SortUtil.Sort { Q]|+Y0y}X
zM@iG]?kc
private static final int THRESHOLD = 10; 2<988F
*50Ykf
/* Ft>ixn
* (non-Javadoc) R#T6Ii
* P{}Oe *9"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5:s]z#8)
*/ Pu9.Uwx
public void sort(int[] data) { XkK16aLE
int[] temp=new int[data.length]; &[Sw:{&*jv
mergeSort(data,temp,0,data.length-1); o<g (%ncr
} )E4COw+
@C!q S7k)
private void mergeSort(int[] data, int[] temp, int l, int r) { .4^Paxz
int i, j, k; u{3KV6MS
int mid = (l + r) / 2; S((8DSt*
if (l == r) He]F~GXP
return; $K,aLcu
if ((mid - l) >= THRESHOLD) f a\cLC
mergeSort(data, temp, l, mid); lhjPS!A~
else |QzPY8B9O
insertSort(data, l, mid - l + 1); *}v'y{;
if ((r - mid) > THRESHOLD) T4f:0r;^f*
mergeSort(data, temp, mid + 1, r); mWGT (`|~/
else ';lO[B
insertSort(data, mid + 1, r - mid); }>OE"#si
Hv`Zc*
for (i = l; i <= mid; i++) { M0"feq
temp = data; R-h7c!ko
} Tl1?5
for (j = 1; j <= r - mid; j++) { ~]yqJYiid^
temp[r - j + 1] = data[j + mid]; my} P\r.
} L`Ic0}|lzy
int a = temp[l]; 4({=(O
int b = temp[r]; ,>g 6OU2~6
for (i = l, j = r, k = l; k <= r; k++) { X:e'@]Z)?
if (a < b) { !l\pwfXP&%
data[k] = temp[i++]; UbYKiLDF)
a = temp; Mr1pRIYMd
} else { Bo0y"W[+
data[k] = temp[j--]; $`5DGy?RU
b = temp[j]; xj~6,;83xR
} Z6*RIdD>
} utTek5/
} Q3KBG8
stDn{x.
/** s=d?}.E$
* @param data j=gbUXv/
* @param l EP8LJzd"
* @param i J\{)qJ*jp
*/ +amvQ];?Q8
private void insertSort(int[] data, int start, int len) { z7K?rgH
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^Uf`w7"iY
} h!Q>h7
} _AO0:&
} lu{}j4
} :#LB}=HQ
dHu]wog
堆排序： !uZ+r%
]MHQ"E?
package org.rut.util.algorithm.support; $wN.~"T
Iq5F^rH`[
import org.rut.util.algorithm.SortUtil; vbFAS:Y:+
|'J3"am'
/** i3GvTg-X
* @author treeroot ;'Y?wH[
* @since 2006-2-2 -@73"w/
* @version 1.0 cn#a/Hx
*/ yO($KL+
public class HeapSort implements SortUtil.Sort{ 54OYAkPCk
V|D;7
/* (non-Javadoc) nJ?C4\#3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >YW>=5_
*/ oO|^ [b#
public void sort(int[] data) { Q,4F=b
MaxHeap h=new MaxHeap(); QZfPd\Q5
h.init(data); mA."*)8VNg
for(int i=0;i h.remove(); @Yg7F>s
System.arraycopy(h.queue,1,data,0,data.length); ::R^ w"
} a} /Vu"
jn7}jWA
private static class MaxHeap{ gPfaiVY
:Hd<S
void init(int[] data){ m<yA] ';s
this.queue=new int[data.length+1]; J8%|Gd0#4
for(int i=0;i queue[++size]=data; IQ_0[
fixUp(size); Cjh&$aq
} Q?>#sN,
} wiVQMgi`
?1{`~)"
private int size=0; d.+vjMI
XXF9oy8
private int[] queue; JC#@sJ4az)
}J*&()`
public int get() { DYl^6]
return queue[1]; dbLX}>
} 3UaP7p+d
1_t Dp&UO
public void remove() { ^DH*@M
SortUtil.swap(queue,1,size--); EK'&S=]
fixDown(1); `~RV
} wx!*fy4hL
file://fixdown T/K.'92S
private void fixDown(int k) { $i1A470C
int j; \(CW?9)
while ((j = k << 1) <= size) { }.'%gJrS
if (j < size %26amp;%26amp; queue[j] j++; !vB%Q$!x
if (queue[k]>queue[j]) file://不用交换 5B2,=?+o
break; /;0>*ft4
SortUtil.swap(queue,j,k); d{he
k = j; EH:1Z*|Z{\
} q^cFD
} C0W~Tk\C2
private void fixUp(int k) { v Y\O=TZT
while (k > 1) { |x4yPYBL
int j = k >> 1; [vi4,'wm
if (queue[j]>queue[k]) Po_OQJ:bd
break; <7rK
SortUtil.swap(queue,j,k); LJ))
k = j; e.+)0)A-
} <It7s1O
} @}Ixr{t
Lwcw%M]
} ;Y'\:
</Id';|v
} n96gDH*
Fs|;>Up0
SortUtil： YUb,5Y0
L,Nr,QC-
package org.rut.util.algorithm; z|<oxF.
]Yu+M3Fq
import org.rut.util.algorithm.support.BubbleSort; _HK&KY
import org.rut.util.algorithm.support.HeapSort; 8?YW i
import org.rut.util.algorithm.support.ImprovedMergeSort; `|w#K28t"
import org.rut.util.algorithm.support.ImprovedQuickSort; &V3oW1*W
import org.rut.util.algorithm.support.InsertSort; gdK/:%u3
import org.rut.util.algorithm.support.MergeSort; $.1'Ym
import org.rut.util.algorithm.support.QuickSort; HH#i.s2
import org.rut.util.algorithm.support.SelectionSort; PPPwDsJ
import org.rut.util.algorithm.support.ShellSort; }ELCnN
:U q]~e
/** _e_%U<\4
* @author treeroot w3N%J>4_E
* @since 2006-2-2 DRoxw24
* @version 1.0 iq:[+
*/ 48Lmy<}*
public class SortUtil { (3h*sd5ly
public final static int INSERT = 1; }Yl=lcvw
public final static int BUBBLE = 2; E?mp6R]}%
public final static int SELECTION = 3; Q75^7Ga_
public final static int SHELL = 4; ?<?C*W_
public final static int QUICK = 5; KUutC :
public final static int IMPROVED_QUICK = 6; +I n"OR%
public final static int MERGE = 7; g)A0PvEu
public final static int IMPROVED_MERGE = 8; 1hyah.i]Y
public final static int HEAP = 9; Q/n.T0Z^
I 6YT|R
public static void sort(int[] data) { Bqi2n'^O2
sort(data, IMPROVED_QUICK); *`-29eR"8
} zjS:;!8em
private static String[] name={ cmU+VZ#pk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h3EDN:FQ
}; 1$VI\}
E@6r{uZ#
private static Sort[] impl=new Sort[]{ x2sOEkcQ
new InsertSort(), bJF/daC5
new BubbleSort(), .4W>9 8
new SelectionSort(), P i!r}m
new ShellSort(), )hW {>Y3x
new QuickSort(), }.) 43(>]
new ImprovedQuickSort(), 4_I{Q^f
new MergeSort(), d`<^+p)oy
new ImprovedMergeSort(), =k=2~ j
new HeapSort() #ljg2:I+
}; pf@}4PN}
*.c9$`s
public static String toString(int algorithm){ (I ds<n"
return name[algorithm-1]; [0ffOTy
} Ju7C?)x
$cK B+}
public static void sort(int[] data, int algorithm) { zZc@;S#
impl[algorithm-1].sort(data); r_,m\'~s!
} F6c[v|3
!TL}~D:J
public static interface Sort { K('lH-3wS
public void sort(int[] data); 51opP8
} d 4\E
NND=Zxl
public static void swap(int[] data, int i, int j) { {dx /p-Tv
int temp = data; 0o$HC86w
data = data[j]; wv.Ulrpx.
data[j] = temp; s]vJUC,s
} Sje0:;;|
} HL}~W}!j