[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; CY"/uSB
} yrlf+tl
int i1=l; 8p:j&F
int i2=mid+1; TTKs3iTXz
for(int cur=l;cur<=r;cur++){ Ba!J"b]
if(i1==mid+1) PBp^|t]E>
data[cur]=temp[i2++]; R.yC(r
else if(i2>r) 'JRvP!]
data[cur]=temp[i1++]; HbxL:~:}J
else if(temp[i1] data[cur]=temp[i1++]; 6E^.7%3
else MerFZd 1
data[cur]=temp[i2++]; oIduxbAp
} lb3]$Da
} 1#ft#-g}
dzDqZQY$
} c\Q7"!e
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改进后的归并排序: kYjGj,m"
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package org.rut.util.algorithm.support; ;u>DNG|.
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import org.rut.util.algorithm.SortUtil; GhIKvX_N
E6pMT^{K
/** o}* hY"&
* @author treeroot iT%} $Lu~
* @since 2006-2-2 (EI;"N (x
* @version 1.0 x;8A!8w
*/ =fO5cA6Z
public class ImprovedMergeSort implements SortUtil.Sort { bp~g;h*E2
&FF"nE*
private static final int THRESHOLD = 10; #~<0t(3Q
`|ASx8_!
/* yge,8i)c
* (non-Javadoc) !;KCU^9
* T-U}QM_e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @ < Q|5
*/ `1bv@yzq
public void sort(int[] data) { BEre*J
int[] temp=new int[data.length]; ]hFW73FV
mergeSort(data,temp,0,data.length-1); UOxkO
} :{q<{^c
Ht&:-F+dm
private void mergeSort(int[] data, int[] temp, int l, int r) { .MP !`
int i, j, k; !'cl"\h
int mid = (l + r) / 2; "HDcmIXg&
if (l == r) M!REygyx
return; v5QqS8u_C
if ((mid - l) >= THRESHOLD) LC'{p
mergeSort(data, temp, l, mid); 8n*.).33
else @CZT
insertSort(data, l, mid - l + 1); NbU[l
if ((r - mid) > THRESHOLD) TjwBv6h
mergeSort(data, temp, mid + 1, r); F)'.g d
else A^y|J`k|
insertSort(data, mid + 1, r - mid); 8j=}u/T@F
$**r(HV
for (i = l; i <= mid; i++) { u (em&M
temp = data; ~;#Y9>7\\'
} YTexv;VNb|
for (j = 1; j <= r - mid; j++) { [&#/]Ul'
temp[r - j + 1] = data[j + mid]; >JC
} -\ EP.Vtz
int a = temp[l]; D0%Ug>
int b = temp[r]; WYEKf9}
for (i = l, j = r, k = l; k <= r; k++) { TwVlg;
if (a < b) { >U]C/P[+
data[k] = temp[i++]; lna}@]oR
a = temp; (?(zH3
} else { :$m}UA-9
data[k] = temp[j--]; #py[
b = temp[j]; /p+>NZ"b
} R}4So1
} RHO(?8"_
} K%F,='P}
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/** /.o^R6
* @param data |!"`MIw,
* @param l e0T34x'
* @param i v,4pp@8rv
*/ 3~S8!nx
private void insertSort(int[] data, int start, int len) { }DK7'K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =W BTm
} b#hDHSdZ,
} a+!tT!g&I
} Ux}(?Z
} iTAx=SG
t-0a7 1#e
堆排序： >V*mr{/1
S>]pRV9rT
package org.rut.util.algorithm.support; -U/c\-~fU
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import org.rut.util.algorithm.SortUtil; !`M|C?b
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/** P)MDPI+~
* @author treeroot W^]3XJP
* @since 2006-2-2 $}jssnoU
* @version 1.0 h?;T7|^
*/ 7|[mz> "d
public class HeapSort implements SortUtil.Sort{ h_T7% #0
< VSA
/* (non-Javadoc) d BJJZ^(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3YFU*f,
*/ UM6(s@$
public void sort(int[] data) { %^>ju;i^O
MaxHeap h=new MaxHeap(); }t%!9hr5D
h.init(data); WUsKnf
for(int i=0;i h.remove(); 8peDI7[|
System.arraycopy(h.queue,1,data,0,data.length); (m:Zk$
} i2&ed_h<?
3 "Q=Vl"
private static class MaxHeap{ X6mqi;+
8qEVOZjV&
void init(int[] data){ -OA?BEQ=I
this.queue=new int[data.length+1]; cdZ~2vk
for(int i=0;i queue[++size]=data; cvfr)K[0
fixUp(size); ],JEBt
} Gmq/3tw
} KFvQ
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private int size=0; isZAoYVu
U9A~9"O
private int[] queue; d~:!#uWyFk
.D:Z{|.1
public int get() { d)R:9M}v
return queue[1]; .72S oT
} cnFI &,FM
JNa"8
public void remove() { 0VGPEKRh
SortUtil.swap(queue,1,size--); MF'$~gxo
fixDown(1); S<WdZ=8sA
} i]|Yg$
file://fixdown <Gt2(;
private void fixDown(int k) { OZTPOz.
int j; ( |PAx(
while ((j = k << 1) <= size) { w[!^;#
if (j < size %26amp;%26amp; queue[j] j++; hDcEGU_
if (queue[k]>queue[j]) file://不用交换 2#<xAR
break; J]G?Rc
SortUtil.swap(queue,j,k); { Q`QX`#
k = j; V {pj~D.E
} )d$glI+
} Jnna$6G)B
private void fixUp(int k) { ]Qfn(u=o
while (k > 1) { GA?87N
int j = k >> 1; KA){''>8
if (queue[j]>queue[k]) g|<]B$yN#
break; )YX 'N<[
SortUtil.swap(queue,j,k); @W^| ?
k = j; <0QH<4
} 5fm?Lxr&?
} |pmZ.r
Q`rF&)Q5
} nD)K}4
BVr0Gk
} %c [F;ug
9uer(}WKT
SortUtil： /}PF\j9#4
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package org.rut.util.algorithm; 0MkSf*
.hba*dV
import org.rut.util.algorithm.support.BubbleSort; PC[c/CoD
import org.rut.util.algorithm.support.HeapSort; g q}I[N
import org.rut.util.algorithm.support.ImprovedMergeSort; 59!Fkd3
import org.rut.util.algorithm.support.ImprovedQuickSort; /,X[k !
import org.rut.util.algorithm.support.InsertSort; -,+q#F
import org.rut.util.algorithm.support.MergeSort; +=mkCU
import org.rut.util.algorithm.support.QuickSort; @EDs~ lPv
import org.rut.util.algorithm.support.SelectionSort; *=wYuJ#
import org.rut.util.algorithm.support.ShellSort; Z0*ljT5|
^.hoLwp.
/** HS.^y x
* @author treeroot h~(D@/tB
* @since 2006-2-2 x)JOClLr
* @version 1.0 }Y*VAnY6;
*/ xritonG/F
public class SortUtil { GN0`rEh
public final static int INSERT = 1; PIWux{
public final static int BUBBLE = 2; Ai/b\:V9S
public final static int SELECTION = 3; |0\0a&tkPl
public final static int SHELL = 4; =e}H'5?!
public final static int QUICK = 5; 2PeR
public final static int IMPROVED_QUICK = 6; }->.k/vc
public final static int MERGE = 7; }?@rO`:EF+
public final static int IMPROVED_MERGE = 8; sU!6hk
public final static int HEAP = 9; 3"kdjOB
Pf$pt
public static void sort(int[] data) { sU"}-de
sort(data, IMPROVED_QUICK); ncX/L[L
} JGFt0He]
private static String[] name={ #CnHf
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u1~9{"P*
}; Kv@eI$t5
xy<`#
private static Sort[] impl=new Sort[]{ UDc$"a}ds{
new InsertSort(), %&Fk4Z}M
new BubbleSort(), ; h`0ir4[A
new SelectionSort(), 394u']M
new ShellSort(), 3hmuF6y~
new QuickSort(), mppBc-#EYr
new ImprovedQuickSort(), |^S[Gr w
new MergeSort(), 6vX+-f
new ImprovedMergeSort(), Ufq"_^4
new HeapSort() -v&Q'a
}; N ]}Re$5
J6hWcA6g
public static String toString(int algorithm){ MQQiQ 2
return name[algorithm-1]; 9$~D4T
} 8hQ"rrj+
8!3+Obj
public static void sort(int[] data, int algorithm) { :B$=Pp1
impl[algorithm-1].sort(data); jS5e"LMIq
} ? Q.Y
\tyL`&)
public static interface Sort { UldKlQ8
public void sort(int[] data); 3dcZ1Yrn
} ?b#/*T}ac
)Si`>o3T-.
public static void swap(int[] data, int i, int j) { >7vSN<w~m
int temp = data; bLCrh(<
data = data[j]; y3 LWh}~E
data[j] = temp; 5;`([oX|_
} /p<mD-:.M
} 1ikkm7