[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; :j? MEeu
} 6xFchdMG{m
int i1=l; Dutc#?bT
int i2=mid+1; I|wC`VgB
for(int cur=l;cur<=r;cur++){ B`YD>oCN
if(i1==mid+1) CwD=nT5`
data[cur]=temp[i2++]; Vjd(Z
else if(i2>r) s4j]kH
data[cur]=temp[i1++]; ?6UjD5NkX
else if(temp[i1] data[cur]=temp[i1++]; 9&{z?*
else Vha,rIi
data[cur]=temp[i2++]; )q`.tsR>
} -EP(/CS!
} 0\Tp/Ph
xo4lM
} v\E6N2.S
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改进后的归并排序: i-9W8A
jX0^1d@
package org.rut.util.algorithm.support; +BDW1%
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import org.rut.util.algorithm.SortUtil; I+( b!(H
E;,__
/** -d-xsP} s
* @author treeroot T[<554
* @since 2006-2-2 raZkH8
* @version 1.0 _5S||TuNS
*/ G7i0P j
public class ImprovedMergeSort implements SortUtil.Sort { N)PkE>%X
9z`72(
private static final int THRESHOLD = 10; .<Ays?
?vFtv}@\
/* eaDR-g"
* (non-Javadoc) mDk6@Gd@U
* hhz#IA6,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;NQ}c"9
*/ bk&kZI.D
public void sort(int[] data) { ,f@j4*)
int[] temp=new int[data.length]; lI~8[[$xd
mergeSort(data,temp,0,data.length-1); V5p^]To!
} W>qu~ak?x
j3H_g^
private void mergeSort(int[] data, int[] temp, int l, int r) { _.E{>IFw
int i, j, k; AxeQv'e
int mid = (l + r) / 2; 6"NtVfui
if (l == r) X(BX+)YR
return; eeBW~_W
if ((mid - l) >= THRESHOLD) gW<4E=fl
mergeSort(data, temp, l, mid); RF;[:[*W
else WX]O1Y
insertSort(data, l, mid - l + 1); EdTL]Xk
if ((r - mid) > THRESHOLD) olr-oi`4C
mergeSort(data, temp, mid + 1, r); Yf/e(nV
else |!/+T^u
insertSort(data, mid + 1, r - mid); ^cE{Uv
VLVDi>0i
for (i = l; i <= mid; i++) { SurreD<x
temp = data; zg'.fUZ
} !X||ds
for (j = 1; j <= r - mid; j++) { @eDs)mY
temp[r - j + 1] = data[j + mid]; KYwUkuw)
} io(!z-$
int a = temp[l]; A@Lr(L
int b = temp[r]; ?!<Q8=
for (i = l, j = r, k = l; k <= r; k++) { 7yXJ\(6R_
if (a < b) { F'F6 &a+
data[k] = temp[i++]; 5;G0$M0
a = temp; }/#*opcv
} else { &['L7
data[k] = temp[j--]; Bp@\p)P(
b = temp[j]; &,3s2,1U(
} |i~-,:/-Y
} LwTdmR
} /n6ZN4
8TG|frS
/** UG_PrZd
* @param data h?$J;xn
* @param l E0l&d
* @param i 2(x| %
*/ X @pm!c#
private void insertSort(int[] data, int start, int len) { ExN$J
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t: oQHhO?
} gz~ug35
} 9HPmJ`b
} "q1S.3V;
} @t@B(1T
8)1=5n
堆排序： CrSBN~
N-t"CBTO
package org.rut.util.algorithm.support; N=7iQ@{1
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import org.rut.util.algorithm.SortUtil; mq:WBSsV
US=K}B=g
/** )Vrp<"v
* @author treeroot ` AD}6O+x
* @since 2006-2-2 SAj#+_db
* @version 1.0 cNFHbMd
*/ jKo9y
public class HeapSort implements SortUtil.Sort{ GmE`YW
H "5,To
/* (non-Javadoc) o3eaNYa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )MLbE-@
*/ FCOa|IKsN
public void sort(int[] data) { /R?[/`)f&
MaxHeap h=new MaxHeap(); `rK@> -
h.init(data); BTYYp1
for(int i=0;i h.remove(); hOkn@F.
System.arraycopy(h.queue,1,data,0,data.length); ,grx'to(X
} ^^*L;b>I
|(2#KMEWa
private static class MaxHeap{ b:r8r}49
e@;'#t
void init(int[] data){ xf8[&?
this.queue=new int[data.length+1]; $E[M[1j
for(int i=0;i queue[++size]=data; AWPgrv/
fixUp(size); ]=ZPSLuEm%
} 'h7x@[|
} if*~cPnN
aMxj{*v7
private int size=0; Q[aF"5h%
yPe9KN_
private int[] queue; ,fTC}>s4
G<k.d"<
public int get() { mPqKk
return queue[1]; :-<30LS$
} nqx0#_K-E
63_#*6Pv28
public void remove() { Ayv:Pv@
SortUtil.swap(queue,1,size--); 5''k|B>
fixDown(1); cH$(*k9%M
} dtTfV.y4w
file://fixdown ]Hq,Pr_+
private void fixDown(int k) { [i.c;'Wy/
int j; W`c$2KS?DO
while ((j = k << 1) <= size) { N 3O!8A_
if (j < size %26amp;%26amp; queue[j] j++; _?y3&4N)
if (queue[k]>queue[j]) file://不用交换 |Kjfh};-C
break; 8B-mZFXpK
SortUtil.swap(queue,j,k); n7Bv~?DM
k = j; Cg%Owe/E?0
} ki}Li*)7
} Y~Vc|zM^(
private void fixUp(int k) { kOdpW
while (k > 1) { kP/<S<h,g
int j = k >> 1; &cTOrG
if (queue[j]>queue[k]) ;K|K]c
break; -sdzA6dp
SortUtil.swap(queue,j,k); |'JN<?
k = j; b/JjA
} y29G#Y4J
} @8w5Oudvx
vJct)i
} v@ qDR|?^
0_-o]BY
} iR PE0
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SortUtil： y`5 ?
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package org.rut.util.algorithm; (CH6Q]Wi_!
K>LS8,8V
import org.rut.util.algorithm.support.BubbleSort; .iP>?9$f"
import org.rut.util.algorithm.support.HeapSort; @Q{:m)\
import org.rut.util.algorithm.support.ImprovedMergeSort; nT2b"wkTT
import org.rut.util.algorithm.support.ImprovedQuickSort; #`U?,>2q
import org.rut.util.algorithm.support.InsertSort; \CE+P5
import org.rut.util.algorithm.support.MergeSort; R.l!KIq
import org.rut.util.algorithm.support.QuickSort; 2M\7j
import org.rut.util.algorithm.support.SelectionSort; n@h$V\&\iM
import org.rut.util.algorithm.support.ShellSort; `F1Yfm jZT
4+nZ4a>LH?
/** |+JO]J#bc
* @author treeroot p,|)qr:M
* @since 2006-2-2 R/fE@d2~In
* @version 1.0 u rQvJ
*/ ]Ol w6W?%
public class SortUtil { 6(t'B!x
public final static int INSERT = 1; CS*lk!C
public final static int BUBBLE = 2; [`E_/95
public final static int SELECTION = 3; [McHl1a
public final static int SHELL = 4; H^`J(J+
public final static int QUICK = 5; hVT>HER
public final static int IMPROVED_QUICK = 6; f\=,_AQ
public final static int MERGE = 7; ZAeJTCCk
public final static int IMPROVED_MERGE = 8; *SI,K)BP
public final static int HEAP = 9; _*[vKS A&
3D5adI<aq"
public static void sort(int[] data) { !>!jLZ0
sort(data, IMPROVED_QUICK); ubsv\[:C
} 7bE`P[
private static String[] name={ >gq=W5vN(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8'zfq ]g
}; z#|Auc0
lX/7
private static Sort[] impl=new Sort[]{ W!kF(O NA
new InsertSort(), ._;It198f
new BubbleSort(), =w8 0y'
new SelectionSort(), $AvaOI.l
new ShellSort(), &z*4Uij
new QuickSort(), sAs`O@
new ImprovedQuickSort(), w8cnSO
new MergeSort(), U8HuqFC
new ImprovedMergeSort(), tj8o6N#
new HeapSort() ;}KJ[5i-V
}; S:xs[b.ZZ
TV_a(#S
public static String toString(int algorithm){ =>Z4vWX*
return name[algorithm-1]; Sx Bo%
} ;0$qT$,
9^C6ZgNS
public static void sort(int[] data, int algorithm) { f*hnzj
impl[algorithm-1].sort(data); k%sA+=
} <&B]p
Rf>V]R
public static interface Sort { =z<sx2#*
public void sort(int[] data); `'mRGz7t
} v$q\3#5|'
.{bT9Sc5
public static void swap(int[] data, int i, int j) { s2 aFme
int temp = data; qT4`3nH:
data = data[j]; n[v`F
data[j] = temp; JlE+CAny
} FOPmvlA\-<
} H.l WHM+H4