[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; zI3Bb?4.
} Amvl/bO
int i1=l; v]BMET[w
int i2=mid+1; nK|WzUtp
for(int cur=l;cur<=r;cur++){ #k<j`0kiq
if(i1==mid+1) xn4-^2
data[cur]=temp[i2++]; ZfN%JJOz(
else if(i2>r) R>. %0%iq
data[cur]=temp[i1++]; J;7O`5J
else if(temp[i1] data[cur]=temp[i1++]; s:#\U!>0`
else '#0'_9}
data[cur]=temp[i2++]; = eDi8A*~
} fP:g}Z
} RgT|^|ZA
\LpR7D
} 4&([<gyR<
o@KK/f
改进后的归并排序: weky 5(:
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package org.rut.util.algorithm.support; X,8]g.<
8z h{?0
import org.rut.util.algorithm.SortUtil; BSB;0OM
0? QTi(
/** ix]t>2r
* @author treeroot s!j[Ovtx
* @since 2006-2-2 rt[w yz8
* @version 1.0 WD7IF+v
*/ "?UBW5nM#
public class ImprovedMergeSort implements SortUtil.Sort { N8^AH8l
F"<TV&xf
private static final int THRESHOLD = 10; Ma,2_oq+
OWRT6R4v
/* VgO:`bDF
* (non-Javadoc) ~SRK}5E
* LJAqk2k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) af<R.
*/ 0qj:v"~Q
public void sort(int[] data) { ]%L?b-e
int[] temp=new int[data.length]; S3iXG @
mergeSort(data,temp,0,data.length-1); |aovZ/b4
} (93+b%^[
jLRh/pbz4
private void mergeSort(int[] data, int[] temp, int l, int r) { .A. VOf_
int i, j, k; dyz)22{\!`
int mid = (l + r) / 2; V9 dRn2- [
if (l == r) n5~7x
return; 8i=c|k,GL.
if ((mid - l) >= THRESHOLD) .m]"lH*
mergeSort(data, temp, l, mid); ? %9-5"U[
else O#g'4 S
insertSort(data, l, mid - l + 1); Ip0~
if ((r - mid) > THRESHOLD) .I"Qu:``
mergeSort(data, temp, mid + 1, r); :QGd/JX$n`
else 4Y)rgLFj
insertSort(data, mid + 1, r - mid); 1gwnG&
ok"v`76~f5
for (i = l; i <= mid; i++) { .S l{m[nV8
temp = data; Ca&5"aki
} p=7{
for (j = 1; j <= r - mid; j++) { f.%mp$~T
temp[r - j + 1] = data[j + mid]; L|wD2iw
} xpWx6
int a = temp[l]; O]\6Pv@N
int b = temp[r]; pO*$'8L
for (i = l, j = r, k = l; k <= r; k++) { ]ZD W+<
if (a < b) { "%o,P/<X
data[k] = temp[i++]; 4$);x/ a
a = temp; G,#]`W@qhK
} else { (h}5*u%h
data[k] = temp[j--]; ! z^%$;p
b = temp[j]; CWP),]#n
} Aj854 L(!
} 9w^lRbn
} h%9>js^~
jT~PwDSFt3
/** 3D"2yTM(
* @param data |Va*=@&6J
* @param l kYlsjM
* @param i KW* 2'C&
*/ 1S&GhJ<wJ
private void insertSort(int[] data, int start, int len) { @H{QHi
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k`l={f8C
} P=.yXirm?
} )w?DB@Tx
} |[)k5nUQ|
} XX85]49`%
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堆排序： p#5U[@TK
~AVn$];{
package org.rut.util.algorithm.support; 9j0Hvo%T
+-DF3(
import org.rut.util.algorithm.SortUtil; ~ 4v
Dl a }-A:
/** (E{>L).~
* @author treeroot -6Y@_N
* @since 2006-2-2 YUzx,Y>k
* @version 1.0 B]KR*
*/ -0QoVGw
public class HeapSort implements SortUtil.Sort{ iyA=d{S;V
\dm5Em/
/* (non-Javadoc) o1kTB&E4B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '|I8byiK
*/ q7}rD$
public void sort(int[] data) { u|ph_?6o
MaxHeap h=new MaxHeap(); Xkqq$A4
h.init(data); b< dwf[
for(int i=0;i h.remove(); pZ_zyI#wx_
System.arraycopy(h.queue,1,data,0,data.length); 2)~`.CD?L
} Fy; sVB
@ 0'j;")XV
private static class MaxHeap{ %Z8'h\|
H*m3i;"4p\
void init(int[] data){ LD=eMk: ~
this.queue=new int[data.length+1]; Udi
for(int i=0;i queue[++size]=data; .+07 Ui]I!
fixUp(size); NmuzAZr
} L@5j? N?F
} @%'1Jd7-Wp
U<YcUmX
private int size=0; 2;wpD2
x>cl$41!W
private int[] queue; _xefFy
&KYPi'C9!z
public int get() { }T5 E^
return queue[1]; 2 rFjYx8D!
} h-f`as"d
2q NA\-0i>
public void remove() { [HEljEv
SortUtil.swap(queue,1,size--); gTS}'w{
fixDown(1); Mp?Gi7o=
} mo?*nO|-
file://fixdown :R{pV7<O
private void fixDown(int k) { )ZW[$:wA
int j; I}jem
while ((j = k << 1) <= size) { 45,):U5
if (j < size %26amp;%26amp; queue[j] j++; 2dyS_2u
if (queue[k]>queue[j]) file://不用交换 eJ%b"H!
break; .6=;{h4cpB
SortUtil.swap(queue,j,k); _f1;Hhoa
k = j; ri`;
} U*:ju+)k
} r j.X"
private void fixUp(int k) { @<jm+f"MP
while (k > 1) { S\SYFXUl
int j = k >> 1; Eq?U$eE
if (queue[j]>queue[k]) aXyFpGdb9
break; AxfQ{>)0
SortUtil.swap(queue,j,k); lhC^Upqw
k = j; @__m>8wn
} B'e@RhU;
} VaW^;d#
0j!xv(1
} JvsL]yRT
&P,uK+C4
} }1DzWS-hh
1=h5Z3/fj
SortUtil： ;X N Ahg7
8OMMV,QF
package org.rut.util.algorithm; AtUtE#K
g%V#Z`*|
import org.rut.util.algorithm.support.BubbleSort; 5\EnD,y
import org.rut.util.algorithm.support.HeapSort; ~"\WV4}`v
import org.rut.util.algorithm.support.ImprovedMergeSort; RrT`]1".
import org.rut.util.algorithm.support.ImprovedQuickSort; x_x_TEyyh
import org.rut.util.algorithm.support.InsertSort; '5b0 K1$"
import org.rut.util.algorithm.support.MergeSort; A>8~deZ9
import org.rut.util.algorithm.support.QuickSort; {;|pcx\L6~
import org.rut.util.algorithm.support.SelectionSort; %^d<go^
import org.rut.util.algorithm.support.ShellSort; yEos$/*u-N
rvU^W+d
/** ~"_!O+Pj
* @author treeroot zBK"k]rz
* @since 2006-2-2 -G~/ GO
* @version 1.0 `-e9#diQe
*/ @u`W(Ow
public class SortUtil { tDavp:M1v
public final static int INSERT = 1; ~;z] _`_Va
public final static int BUBBLE = 2; 7n o6
public final static int SELECTION = 3; (?g+.]Dt,
public final static int SHELL = 4; 1KY0hAx
public final static int QUICK = 5; <CB%e!~.9
public final static int IMPROVED_QUICK = 6; T`MM<+^G
public final static int MERGE = 7; @lX%Fix9
public final static int IMPROVED_MERGE = 8; lXF7)H&T
public final static int HEAP = 9; c|(J%@B)
}30Sb&"
public static void sort(int[] data) { f_$hK9I
sort(data, IMPROVED_QUICK); eEfGH
} ~1E!Co
private static String[] name={ .vctuy&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %6%mf>Guf
}; +$#<gp"
5|~nX8>
private static Sort[] impl=new Sort[]{ &ds+9A
new InsertSort(), )hl7)~S<
new BubbleSort(), d=meh4Y
new SelectionSort(), by0K:*C
new ShellSort(), G3`9'-2q@c
new QuickSort(), ,*dLE
new ImprovedQuickSort(), ',xUU{5?
new MergeSort(), 7y3WV95Z\
new ImprovedMergeSort(), J}[[tl
new HeapSort() f^*Yqa
}; >e& L"
:*&c'
public static String toString(int algorithm){ kW2DKr-[
return name[algorithm-1]; P9qIq]M
} ~c<8;,cjYR
|U;O HS
public static void sort(int[] data, int algorithm) { 6WT3-@d
impl[algorithm-1].sort(data); mv#hy
} +v 3:\#
n42\ty9
public static interface Sort { ^\Z+Xq1~/
public void sort(int[] data); h@NC#Iod
} qPD(D{,f$
m7y[Y
public static void swap(int[] data, int i, int j) { FG[rH]
int temp = data; 8Th,C{
data = data[j]; @XolFOL"f"
data[j] = temp; -e}(\
} %Z<{CV
} O^=+"O]