[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; *K/K97
} 5iA>Z!sP[
int i1=l; 50_[hC&C)
int i2=mid+1; wH~A> 4*(
for(int cur=l;cur<=r;cur++){ <m-(B"FX
if(i1==mid+1) 7Eyi~jes
data[cur]=temp[i2++]; 2IB{FO/
else if(i2>r) p1UloG\
data[cur]=temp[i1++]; a=MN:s?Fc0
else if(temp[i1] data[cur]=temp[i1++]; 0s;~9>
else xS|9Gk
data[cur]=temp[i2++]; _.s,gX
} Qt.*Z;Gs
} s5*4<VxQN.
`%Ih'(ne
} VIAq$iu7
?|5M'o|9
改进后的归并排序: &#PPXwmR
2.^{4 1:
package org.rut.util.algorithm.support; r&LZH.$oh
v'hc-Q9+>
import org.rut.util.algorithm.SortUtil; 0D,@^vw bK
v`|]57?A
/** h@ lz
* @author treeroot cEL:5*cAU}
* @since 2006-2-2 ?}?"m:=
* @version 1.0 [icD*N<Gc
*/ x#0?$}f<
public class ImprovedMergeSort implements SortUtil.Sort { Qder8I
mx9vjWfy
private static final int THRESHOLD = 10; s@Q7F{z
p"0#G&-
/* 1 uU$V =
* (non-Javadoc) ?Bu*%+
* 0nt@}\j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DtANb^
*/ !<];N0nt#
public void sort(int[] data) { %+'Ex]B
int[] temp=new int[data.length]; {"]!zL
mergeSort(data,temp,0,data.length-1); 2^'Ec:|f
} ys`-QlkB
XUP{]w`.Z
private void mergeSort(int[] data, int[] temp, int l, int r) { HT.,BF
int i, j, k; chICc</l&
int mid = (l + r) / 2; xNIrmqm5]
if (l == r) A+l(ew5Lw$
return; T,!EL+o4
if ((mid - l) >= THRESHOLD) %"{P?V<-V
mergeSort(data, temp, l, mid); mqZK1<r
else FAM{p=t]HT
insertSort(data, l, mid - l + 1); Au2?f~#Fv
if ((r - mid) > THRESHOLD) a"@f< wU~
mergeSort(data, temp, mid + 1, r); lAnq2j|
else V*n$$-5 1-
insertSort(data, mid + 1, r - mid); wNmpUO ?
\c\~k0u
for (i = l; i <= mid; i++) { iy~h|YK;
temp = data; 'w,gYW
} KS*,'hvY
for (j = 1; j <= r - mid; j++) { ,7wYa&
temp[r - j + 1] = data[j + mid]; dfFw6R
} c'Z=uL<Rm
int a = temp[l]; O>DS%6/G
int b = temp[r]; y]Nk^ga:U6
for (i = l, j = r, k = l; k <= r; k++) { =q VT
if (a < b) { =2$( tXL
data[k] = temp[i++]; C_J@:HlJ
a = temp; uX-^9t
} else { 1{N+B#*<[X
data[k] = temp[j--]; v?."`,e
b = temp[j]; ]njNSn
} k^cZePqE6d
} L-(bw3Yr>
} gY7sf1\wX
EK# 11@0%
/** Phi5;U!
* @param data QD7KE6KP'
* @param l O+W<l:|$
* @param i cvsH-uAp
*/ -*7i:mg
private void insertSort(int[] data, int start, int len) { VJ\qp%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +c%jOl
} T+L=GnYl
} OJu>#
} @aQ:3/
} #QFz /6
9\EW~OgTu
堆排序： }.o.*N
AE:(:U\
package org.rut.util.algorithm.support; iZG-ca
g-K;J4 K%
import org.rut.util.algorithm.SortUtil; cg{5\Vl
#TNjQNg@O
/** P;.roD9
* @author treeroot s4|tWfZ
* @since 2006-2-2 9`Qa/Y!
* @version 1.0 z I2DQ] 9
*/ R3G\Gchd
public class HeapSort implements SortUtil.Sort{ f"Iui
2|j=^
/* (non-Javadoc) 1 3]e< '
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *IOrv)
*/ |?V7E\S
public void sort(int[] data) { W(]A^C=/
MaxHeap h=new MaxHeap(); kSV(T'#x
h.init(data); ^mLX}E]
for(int i=0;i h.remove(); {ENd]@N*
System.arraycopy(h.queue,1,data,0,data.length); :#g.%&
} fNLO%\G~2
(nQm9 M(
private static class MaxHeap{ poAJl;T
(d#&m+ g]
void init(int[] data){ ry|a_3X(I
this.queue=new int[data.length+1]; E#_/#J]UQn
for(int i=0;i queue[++size]=data; XQ=%a5w
fixUp(size); dm}1"BU<
} lW5Lwyt8
} {> ,M
)jXKPLj
private int size=0; :h(RS;
i[[.1MnS
private int[] queue; (nO2+@!
K+|XI|1p
public int get() { -Kg.w*\H7/
return queue[1]; aB6/-T+u
} f_)#
s=:)!M.i
public void remove() { 6hj[/O)E
SortUtil.swap(queue,1,size--); Y-bTKSn
fixDown(1); +ZbNSN=
} VLV]e_D6s
file://fixdown y7/4u-_c
private void fixDown(int k) { JOG-i
int j; 4L,wBce;,t
while ((j = k << 1) <= size) { S(CkA\[rz
if (j < size %26amp;%26amp; queue[j] j++; SZXSVz0j
if (queue[k]>queue[j]) file://不用交换 3UXZ|!-
break; g$NUu
SortUtil.swap(queue,j,k); x:0swZ5Z
k = j; AM=> P7
} k6"(\d9o
} Pm6U:RL
private void fixUp(int k) { &OJ?Za@p@)
while (k > 1) { hY!ek;/Gc
int j = k >> 1; 6~sU[thGW
if (queue[j]>queue[k]) M@KQOAzt
break; l@&-be
SortUtil.swap(queue,j,k); <lR:^M[v5<
k = j; {J)%6eL?
} 2OpA1$n6
} sSfP.R
x"sbm
} D7nK"]HG;l
T%oJmp?0
} tm/>H
P>rRD`Yy\
SortUtil： L+G0/G}O\
mxZ+r#|di
package org.rut.util.algorithm; {96MfhkeBv
:[+8(~| za
import org.rut.util.algorithm.support.BubbleSort; [>mH
import org.rut.util.algorithm.support.HeapSort; kSiyMDY-
import org.rut.util.algorithm.support.ImprovedMergeSort; E[#VWM I
import org.rut.util.algorithm.support.ImprovedQuickSort; ]&H"EHC<$
import org.rut.util.algorithm.support.InsertSort; ;%d<Uk?
import org.rut.util.algorithm.support.MergeSort; U]}FA2
import org.rut.util.algorithm.support.QuickSort; eH7x>[lH.
import org.rut.util.algorithm.support.SelectionSort; U"/T`f'H z
import org.rut.util.algorithm.support.ShellSort; ^[.}DNR95(
Q>Klkd5(
/** /&|p7
* @author treeroot . q -:3b
* @since 2006-2-2 31c*^ZE.
* @version 1.0 U2?R&c;b
*/ [-[59H[6)
public class SortUtil { C)R hld
public final static int INSERT = 1; y;CX)!8
public final static int BUBBLE = 2; pYzop4
public final static int SELECTION = 3; dhA~Yu
public final static int SHELL = 4; 2]?=\_T
public final static int QUICK = 5; ,\iXZ5"R
public final static int IMPROVED_QUICK = 6; 59{X;
public final static int MERGE = 7; 'm`}XGUBS
public final static int IMPROVED_MERGE = 8; .s>@@m-
public final static int HEAP = 9; K"VcPDK
5?HwM[`
public static void sort(int[] data) { N@tKgx
sort(data, IMPROVED_QUICK); ~tWh6-:|{J
} _BA; H+M
private static String[] name={ LI@BB:)[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #8M?y*<I
}; :QP1!
~}j+~
private static Sort[] impl=new Sort[]{ )EB+(c~E
new InsertSort(), vu@.;-2E%
new BubbleSort(), 'fl.&"/r
new SelectionSort(), @@^iN~uf
new ShellSort(), _f";zd
new QuickSort(), B<L7`xL
new ImprovedQuickSort(), T5|kO:CbHq
new MergeSort(), ~n@rX=Y)]0
new ImprovedMergeSort(), aL[6}U0(}
new HeapSort() sM MtU@<x
}; #S9J9k
{|>Wwa2e
public static String toString(int algorithm){ XQn1B3k+
return name[algorithm-1]; N,K/Ya)1
} wH!$TAZ:Yw
j24 3oD
public static void sort(int[] data, int algorithm) { "P#1=
impl[algorithm-1].sort(data); Dfzj/spFV
} J)n_u),
r@C~_LgL)
public static interface Sort { gIz!~I_U
public void sort(int[] data); V'{\g|)
} UA*VqK)Y
,DE>:ARZ
public static void swap(int[] data, int i, int j) { Jn=;gtD-*
int temp = data; FHU6o910
data = data[j]; P~{8L.w!>W
data[j] = temp; .e0)@}Jv8>
} bKmwXDv'
} b9X*2pnWJ