[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; #5D+XBT
} DkIFvsLK
int i1=l; Jj " {r{
int i2=mid+1; #t O!3=0
for(int cur=l;cur<=r;cur++){ | QA8"&r
if(i1==mid+1) cF2/}m]
data[cur]=temp[i2++]; <G>PPf}
else if(i2>r) N[-)c,O
data[cur]=temp[i1++]; m%&B4E#3T
else if(temp[i1] data[cur]=temp[i1++]; 7h2bL6Y88
else <c#[.{A}s
data[cur]=temp[i2++]; zCrcCr
} 9:>K!@
} s,Swlo7D!
UwU]l17~
} UL%ihWq
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改进后的归并排序: AqkK`iJ#
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package org.rut.util.algorithm.support; 7 SZR#L
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import org.rut.util.algorithm.SortUtil; 2e"}5b5
_HsvF[\[
/** _SqrQ
* @author treeroot 9[D7N
* @since 2006-2-2 BE~[%6T7
* @version 1.0 `vw.~OBl
*/ ;[9Is\
public class ImprovedMergeSort implements SortUtil.Sort { M6iKl
bG)MG0<TT
private static final int THRESHOLD = 10; BP$#a #
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/* 4(82dmKO
* (non-Javadoc) ny={V*m
* ([~`{,sv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V{{x~Q9
*/ _3a 5/IZ
public void sort(int[] data) { 3iw9jhK!W
int[] temp=new int[data.length]; j&.BbcE45
mergeSort(data,temp,0,data.length-1); Oe`t!&v
} <Tf;p8#
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private void mergeSort(int[] data, int[] temp, int l, int r) { 5b p"dIe
int i, j, k; Qs:r@"hE
int mid = (l + r) / 2; s 'xmv{|
if (l == r) ?M^t4nj
return; 3G^Ed)JvE
if ((mid - l) >= THRESHOLD) *.g?y6d
mergeSort(data, temp, l, mid); EB<q.
else ,6"n5Ks}
insertSort(data, l, mid - l + 1); 98^6{p
if ((r - mid) > THRESHOLD) "'Uk0>d=_I
mergeSort(data, temp, mid + 1, r); B:cOcd?p
else fx:KH:q3
insertSort(data, mid + 1, r - mid); (N4(r<o;
'OCo1|iK~
for (i = l; i <= mid; i++) { %<yM=1~>
temp = data; M7,MxwZ0k
} >N-%
for (j = 1; j <= r - mid; j++) { "6Uj:9
temp[r - j + 1] = data[j + mid]; i5Q<~;Z+
} zi .,?Q
int a = temp[l]; 0(x@ NGb>{
int b = temp[r]; KTt$Pt/.
for (i = l, j = r, k = l; k <= r; k++) { Xkom@F~]
if (a < b) { ton`ji\^
data[k] = temp[i++]; =fK'Ep[
a = temp; om?CFl
} else { yXg1N N
data[k] = temp[j--]; 0z7mre^Q
b = temp[j]; 7"ps#)O
} ]xEE7H]\h
} RI3{>|*
} ;bX ~4O&v+
shIi,!bZ
/** P1stL,
* @param data F t/ x5
* @param l s$x] fO
* @param i }TJ|d=
*/ X@U1Ri
private void insertSort(int[] data, int start, int len) { CL :M>(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Ag0_^
} 8p{
} Gcz@ze
} } <4[(N
} NqE7[wH
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堆排序： Cnci%eo
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package org.rut.util.algorithm.support; iLcadX
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import org.rut.util.algorithm.SortUtil; FNCLGAiZ
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/** zB" `i
* @author treeroot EZQ+HECpK
* @since 2006-2-2 e.|RC
* @version 1.0 hRIS[#z;U
*/ <<5 :zlb
public class HeapSort implements SortUtil.Sort{ |!5T+H{Sj
9w;J7jgOT!
/* (non-Javadoc) :;q_f+U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .y9rM{h}b
*/ fhIj+/{_O
public void sort(int[] data) { *jw$d8q2
MaxHeap h=new MaxHeap(); $1zeY6O
h.init(data); 'O2#1SWe
for(int i=0;i h.remove(); XW_xNkpL5c
System.arraycopy(h.queue,1,data,0,data.length); 8t:&#h
} 0$Y 9>)O
9^#gVTGXv
private static class MaxHeap{ 0gD59N'C
K6*UFO4}i
void init(int[] data){ " IkF/
this.queue=new int[data.length+1]; 76Vyhf&7
for(int i=0;i queue[++size]=data; J&ECm+2
fixUp(size); [2 w<F[
} ]q[
} pUMB)(<k
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private int size=0; agm5D/H]:
0!,gT H>
private int[] queue; &xuwke:[
*R\/#Y|
public int get() { -b\V(@5
return queue[1]; 3p 1EScH
} 6(^Upk=59
8<wuH#2<y
public void remove() { dF11Rj,~ 8
SortUtil.swap(queue,1,size--); ^x"c0R^
fixDown(1); <ivqe"m
} p/WH#4Xdr
file://fixdown &Dg)"Xji
private void fixDown(int k) { !QR?\9`
int j; K1/gJ9+(\
while ((j = k << 1) <= size) { {&}/p-S
if (j < size %26amp;%26amp; queue[j] j++; e(=~K@m
if (queue[k]>queue[j]) file://不用交换 /z)3gsF
break; @S"pJeP/f
SortUtil.swap(queue,j,k); {_toh/8)r
k = j; #w,WwL!
} oz0n$`O$/
} R!k<l<9q
private void fixUp(int k) { R-A'v&=
while (k > 1) { 2u*h*/
int j = k >> 1; YUVc9PV)Ws
if (queue[j]>queue[k]) 56=K@$L {F
break; :O'C:n<g
SortUtil.swap(queue,j,k); Uq]EJu
k = j; Fwx~ ~"I
} ZCE%38E N
} 5 2@udp
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} Q_]!an(
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} 5}MlZp
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SortUtil： &!DZW5
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package org.rut.util.algorithm; MX`Wg
VU`z|nBW@
import org.rut.util.algorithm.support.BubbleSort; mzV"G>,o
import org.rut.util.algorithm.support.HeapSort; /,Dwu?Lcqp
import org.rut.util.algorithm.support.ImprovedMergeSort; ]o[X+;Tj|
import org.rut.util.algorithm.support.ImprovedQuickSort; V3 _b!
import org.rut.util.algorithm.support.InsertSort; Q3Z%a|3W
import org.rut.util.algorithm.support.MergeSort; ~ACP%QM=
import org.rut.util.algorithm.support.QuickSort; SGBVR^
import org.rut.util.algorithm.support.SelectionSort; "wF ?Hamz
import org.rut.util.algorithm.support.ShellSort; \at-"[.
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/** o[6vxTH
* @author treeroot Q@e*$<3
* @since 2006-2-2 /nY).lSH
* @version 1.0 e>,9]{N+$
*/ 9QOr,~~s
public class SortUtil { o!s%h!%L
public final static int INSERT = 1; $d2kHT
public final static int BUBBLE = 2; yxG:\y b
public final static int SELECTION = 3; lRv#1'Y
public final static int SHELL = 4; esh$*)1
public final static int QUICK = 5; u 5Eo
public final static int IMPROVED_QUICK = 6; z{`6#
public final static int MERGE = 7; zJfK4o
public final static int IMPROVED_MERGE = 8; ovQS ET18b
public final static int HEAP = 9; LZUA+x(
d DIQ+/mmg
public static void sort(int[] data) { ^.@yF;H
sort(data, IMPROVED_QUICK); |C$:]MZx
} 4V228>9w
private static String[] name={ =GH@.3`X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H]tSb//qc
}; N#RD:"RS!
462!;/y
private static Sort[] impl=new Sort[]{ b(|%Gbg@c
new InsertSort(), 7wiK.99
new BubbleSort(), =`]|/<=9'U
new SelectionSort(), RRS~ xOg
new ShellSort(), %\X P:
new QuickSort(), P1 7>6)a
new ImprovedQuickSort(), ;Na8_}
new MergeSort(), k1f3?l vlU
new ImprovedMergeSort(), S_T{L
new HeapSort() &Rt+LN0qB0
}; } g3HoFC
QmH/yy3.%
public static String toString(int algorithm){ qE#&)
return name[algorithm-1]; fuNl4BU
} P[rAJJN/E
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public static void sort(int[] data, int algorithm) { rV8(ia
impl[algorithm-1].sort(data); |'U,/
} ";)r*UgR{B
m\*&2Na
public static interface Sort { ``(}4a
public void sort(int[] data); 8qFUYZtY
} 69[V <1
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public static void swap(int[] data, int i, int j) { Yl)eh(\&J
int temp = data; TnN^2:cU
data = data[j]; E1c>nrnh*
data[j] = temp; 9,S,NvSq
} $xRo<,OV+
} jo,6Aog|u