[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; Qf .ASC
} ,O'#7Dj
int i1=l; 0#d:<+4D
int i2=mid+1; 0DB8[#i%:
for(int cur=l;cur<=r;cur++){ (>R
if(i1==mid+1) [Nw%fuB
data[cur]=temp[i2++]; wyi%!H
else if(i2>r) E5+-N
data[cur]=temp[i1++]; i[#XYX'\
else if(temp[i1] data[cur]=temp[i1++]; |b+ZKRW
else #GbfFoE
data[cur]=temp[i2++]; ^aONuG9
} ZYexW=@
} GL^84[f-T
~x-v%x6
} I"hlLP
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改进后的归并排序: I)AbH<G{
S%p.|!
package org.rut.util.algorithm.support; wxc24y
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import org.rut.util.algorithm.SortUtil; v(`9+*
]F#}8$
/** 1KMSBLx
* @author treeroot ?heg_~P
* @since 2006-2-2 !XqU'xxC
* @version 1.0 2e<u/M21>
*/ y7ZYo7avg
public class ImprovedMergeSort implements SortUtil.Sort { 4c'F.0^
i!i=6m.q7
private static final int THRESHOLD = 10; \5pBK
+.2OZ3(
/* Q^{XM
* (non-Javadoc) z4iTf8
* uz /Wbc>y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !x$6wzKa
*/ MfU0*nVF~
public void sort(int[] data) { ]I[\Io1
int[] temp=new int[data.length]; :?P>))vT%
mergeSort(data,temp,0,data.length-1); [q!/YL3%
} q\n,/#'i~
L']"I^(N
private void mergeSort(int[] data, int[] temp, int l, int r) { &`%J1[dy
int i, j, k; U0ZPY )7k
int mid = (l + r) / 2; sJ{J@/5
if (l == r) Wi+}qO
return; F^Y%Q(Dd7w
if ((mid - l) >= THRESHOLD) @QO^3%b8
mergeSort(data, temp, l, mid); I R|[&}z
else [aF"5G
insertSort(data, l, mid - l + 1); wec_=EqK0
if ((r - mid) > THRESHOLD) ]J^/`gc
mergeSort(data, temp, mid + 1, r); { u %xc"0y
else %}}?Y`/W)
insertSort(data, mid + 1, r - mid); 0$BX8?Z
5rH?FQE
for (i = l; i <= mid; i++) { ^r@,(r6w
temp = data; `Fx+HIng,
} H#/Hs#
for (j = 1; j <= r - mid; j++) { ;-Ki`x.oJ
temp[r - j + 1] = data[j + mid]; Jq*Q;}n
} wA2^I70-
int a = temp[l]; 7ND4Booul
int b = temp[r]; L-DL)8;`
for (i = l, j = r, k = l; k <= r; k++) { fl}!V4
if (a < b) { ZKTY1JW_
data[k] = temp[i++]; Gq]/6igzX
a = temp; :ggXVwpe
} else { .(%]RSBY
data[k] = temp[j--]; | r,{#EE
b = temp[j]; y!VL`xV
} PS3jCT
} 2-pv &
} 2(2UAB"u
TZ#^AV=ae
/** Y3JIDT^
* @param data :!/ (N
* @param l U8a5rF><
* @param i qs>&Xn
*/ GDQQ4-|O
private void insertSort(int[] data, int start, int len) { )W/_2Q.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Gzc`5n{"
} V<ii
} ^6QzaC3
} `b KJ
} ENy$sS6[D
jx#9
堆排序： yioX^`Fc(~
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package org.rut.util.algorithm.support; F<4>g+Ag
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import org.rut.util.algorithm.SortUtil; K]&i9`>N
u&Yd+');
/** "$.B@[iY@
* @author treeroot [0!*<%BgK'
* @since 2006-2-2 ! NJGW
* @version 1.0 3Mq%3jX
*/ +45.fo
public class HeapSort implements SortUtil.Sort{ '?Xf(6o1
^fj30gw7\5
/* (non-Javadoc) A_Y5{6@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Oe21noL
*/ `Y3\R#
public void sort(int[] data) { O4cBn{Dq9
MaxHeap h=new MaxHeap(); &ZL4/e
h.init(data); *z^Au7,&
for(int i=0;i h.remove(); s&iu+>
System.arraycopy(h.queue,1,data,0,data.length); kkIG{Bw
} x~ID[
AquO#A[,#
private static class MaxHeap{ <m,bP c :R
=\M6s
void init(int[] data){ n?QglN
this.queue=new int[data.length+1]; K7t_Q8
for(int i=0;i queue[++size]=data; aF[#(PF
fixUp(size); 7AF6aog
} =@D H hg
} 7- |N&u
uFuP%f!yY
private int size=0; ?CldcxM#
( 6ucA
private int[] queue; |-TxX:O-
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public int get() { y!T8(
return queue[1]; ,n`S ,
} uR.`8s|
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public void remove() { %I;uqf
SortUtil.swap(queue,1,size--); ?:6w6GwAA
fixDown(1); Bkg./iP5x
} -b)3+#f
file://fixdown +R_s(2vz
private void fixDown(int k) { _zkTx7H
int j; l{Et:W%|
while ((j = k << 1) <= size) { "5v^6R9e
if (j < size %26amp;%26amp; queue[j] j++; V`rxjv}!
if (queue[k]>queue[j]) file://不用交换 e?N3&ezp
break; ==S^IBG
SortUtil.swap(queue,j,k); 8gG;A8
k = j; 0./Rdf=-1j
} iI;np+uYk
} hW`o-'
private void fixUp(int k) { _p?s[r*
while (k > 1) { y(O~=S+<
int j = k >> 1; wScr:o+K>L
if (queue[j]>queue[k]) wEw;],ur
break; yH9&HFDp
SortUtil.swap(queue,j,k); e-nwR
k = j; $RYOj{1
} @k\,XV`T~t
} wRZS+^hx
'wWuR@e#&
} hxt;sQAo{
c<sq0('`
} 8T8]gM
PAH#yM2Ic
SortUtil： yyGn<
e'p"gX
package org.rut.util.algorithm; &_-3>8gU
Sbeq%Iwm.
import org.rut.util.algorithm.support.BubbleSort; CdMV(
import org.rut.util.algorithm.support.HeapSort; ^V7)V)Z;0
import org.rut.util.algorithm.support.ImprovedMergeSort; |pBvy1e4)
import org.rut.util.algorithm.support.ImprovedQuickSort; t^2$ent
import org.rut.util.algorithm.support.InsertSort; :(4q\~
import org.rut.util.algorithm.support.MergeSort; !r9rTS]
import org.rut.util.algorithm.support.QuickSort; ?X Rl\V
import org.rut.util.algorithm.support.SelectionSort; !}sF#
import org.rut.util.algorithm.support.ShellSort; Oc-ia)v1G
T-]UAN"O
/** ZZYtaVF:
* @author treeroot w_DaldK*
* @since 2006-2-2 mex@~VK
* @version 1.0 P.jy7:dB,
*/ t>x!CNb'C
public class SortUtil { WO6+r?0M2
public final static int INSERT = 1; b;nqhO[f}
public final static int BUBBLE = 2; P76gJ@#m
public final static int SELECTION = 3; <sX_hIA^Fx
public final static int SHELL = 4; yZ]?-7
public final static int QUICK = 5; deJ/3\t
public final static int IMPROVED_QUICK = 6; I:0dz:T7*
public final static int MERGE = 7; a-AA$U9hj
public final static int IMPROVED_MERGE = 8; *$3p3-
public final static int HEAP = 9; $M~`)UeV_
F"QJ)F
public static void sort(int[] data) { ;,7m
sort(data, IMPROVED_QUICK); BU7QK_zT:
} h)aLq
private static String[] name={ k=G c#SD5_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nU0##
}; f0YBy<a
7K+eI!m.s
private static Sort[] impl=new Sort[]{ m>?|*a,
new InsertSort(), N`qGwNT%G
new BubbleSort(), 16Jjf|]j
new SelectionSort(), D_G]WW8
new ShellSort(), gZ-:4G|J
new QuickSort(), 0.c96&
new ImprovedQuickSort(), #B q|^:nj
new MergeSort(), G&`5o*).bb
new ImprovedMergeSort(), C =B a|Z
new HeapSort() ?j)#\s2
}; rv<qze;?|
Kzy9i/bL
public static String toString(int algorithm){ tK `A_hC
return name[algorithm-1]; R]RLy#j
} SR`A]EC(V
1lJ^$U
public static void sort(int[] data, int algorithm) { eLbh1L
impl[algorithm-1].sort(data); Do5{t'm3
} i[w&!mn%
B9,
public static interface Sort { 7[i&EPN
public void sort(int[] data); qD/h/
} |tz{Es<`B
_X@ Q`d
public static void swap(int[] data, int i, int j) { 88 ca
int temp = data; L(X}37
data = data[j]; lQ"t#b+
data[j] = temp; P ?96;
} 7HL23Vrk
} LX #.