[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; l;'c6o0e
} AE&IN.-
int i1=l; }|4dEao\
int i2=mid+1; AV^Sla7|_
for(int cur=l;cur<=r;cur++){ ^n8r mh_%
if(i1==mid+1) zIgD R
data[cur]=temp[i2++]; J(%kcueb
else if(i2>r) |T^c(RpOE
data[cur]=temp[i1++]; *8j2iu-|
else if(temp[i1] data[cur]=temp[i1++]; %SD=3UK6
else 9UeK}Rl^n
data[cur]=temp[i2++]; |\S p IFH1
} b+ J)
} Vq1ve;(8s
\D,c*I|p7
} d`&F
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改进后的归并排序: tO]` I-
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package org.rut.util.algorithm.support; i-_ * 5%A
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import org.rut.util.algorithm.SortUtil; ( mKuFz7
7!-y72qx
/** 0s8w)%4$
* @author treeroot ZdY)&LJ
* @since 2006-2-2 "Rv],O"
* @version 1.0 -% Z?rn2
*/ 2q,> *B?
public class ImprovedMergeSort implements SortUtil.Sort { #iAEcC0k5
Wf>scl`s
private static final int THRESHOLD = 10; h$~\to$C
?\NWKp
/* #Jqa_$\.
* (non-Javadoc) Q`7.-di
* V_Oj?MMpn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >gFEA0-
*/ =g+Rk+jn
public void sort(int[] data) { "iY=1F"\R
int[] temp=new int[data.length]; .#ASo!O5q
mergeSort(data,temp,0,data.length-1); hIv8A_>@`
} JM-+p
dr iw\
private void mergeSort(int[] data, int[] temp, int l, int r) { 9akIu.H
int i, j, k; {*J{1)2
int mid = (l + r) / 2; N9A#@c0O
if (l == r) 0xQ="aXE
return; +*aZ9g
if ((mid - l) >= THRESHOLD) d~U}IMj
mergeSort(data, temp, l, mid); x[5uz))
else yq2pg8%
insertSort(data, l, mid - l + 1); kL1StF#p
if ((r - mid) > THRESHOLD) v8!Ts"
mergeSort(data, temp, mid + 1, r); QBI;aG<+b>
else #N'W+M /
insertSort(data, mid + 1, r - mid); 1fzHmD
l4+Bs!i`
for (i = l; i <= mid; i++) { mE}@}@(
temp = data; QZs ]'*=#
} aEW sru
for (j = 1; j <= r - mid; j++) { 5p7?e3
temp[r - j + 1] = data[j + mid]; $06[D91'
} %}=:gF
int a = temp[l]; _pS|bqF
int b = temp[r]; W dNOE;R
for (i = l, j = r, k = l; k <= r; k++) { MQ{.%
if (a < b) { V"`t*m$
data[k] = temp[i++]; ?]]d s]
a = temp; )IH|S5mG?
} else { `oq][|
data[k] = temp[j--]; n$oHr
b = temp[j]; 9Oe~e
} q/lQEfR
} ?' :v):J}
} awic9uMH
BQ7p<{G
/** H]x-s
* @param data /$ :w8
* @param l )Z0bMO<
* @param i *VPjBzcH
*/ R@8pKCL.
private void insertSort(int[] data, int start, int len) { dRD t.U!T
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :7P/ZC%
} hmQ;!9
} L H8iHB
} ;0c -+,
} [,)G\
V|n}v?f_q
堆排序： ?8GggJC
p&nPzZQL(
package org.rut.util.algorithm.support; 1\aJ[t
BHZCM^
import org.rut.util.algorithm.SortUtil; zY=eeG+4s
>3MzsAH\
/** y`|86` Y
* @author treeroot ,&5\`
* @since 2006-2-2 R#^.8g)t
* @version 1.0 [PW\l+i
*/ %A^V@0K3
public class HeapSort implements SortUtil.Sort{ O;dtz\
y k{8O.g
/* (non-Javadoc) 0lm7'H*~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H-|%\9&{S
*/ z?DI4O#Up
public void sort(int[] data) { ^.HvuG},O
MaxHeap h=new MaxHeap(); OkV*,n
h.init(data); 3Hd~mfO\
for(int i=0;i h.remove(); &{uj3s&C
System.arraycopy(h.queue,1,data,0,data.length); nign"r
} 45aUz@
_*m<Z;Et
private static class MaxHeap{ l3O!{&~K
<1%(%KdN[
void init(int[] data){ Z.l4<
this.queue=new int[data.length+1]; S<Os\/*
for(int i=0;i queue[++size]=data; w$##GM=Tq
fixUp(size); A 6IrA/b
} EQTJ=\WFF
} g]Jt (aYK
w5+H9R6
private int size=0; J^V}%N".
s ]XZQr%
private int[] queue; / :z<+SCh
x=M%QFe
public int get() { sW^e D;
return queue[1]; /2.}m`5
} K8bKTG\
=f/CBYNw@V
public void remove() { 0;Oe&Y
SortUtil.swap(queue,1,size--); yCvP-?2
fixDown(1); srCpgs]h
} 77b^d9! ~
file://fixdown j"F?^0aR,Q
private void fixDown(int k) { I?&/J4o:
int j; 8v}B-cS
while ((j = k << 1) <= size) { [. Db56
if (j < size %26amp;%26amp; queue[j] j++; {)jTq??
if (queue[k]>queue[j]) file://不用交换 YT`,f*t
break; {Z,_/@}N
SortUtil.swap(queue,j,k); .C*mDi)wZ
k = j; %;eD.If}
} ,6EhtNDu
} teKx^ 'c'
private void fixUp(int k) { *671MJ9
while (k > 1) { @=sM')f&
int j = k >> 1; 2<FEn$n[
if (queue[j]>queue[k]) 2z9s$tp
break; fg)VO6Wo&
SortUtil.swap(queue,j,k); ?:42jp3
k = j; T!7B0_
} )! eJW(
} AxtmG\o>
D){my_ /
} 48IrC_0j
g7"2}|qxo
} K0YQ b&*k
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SortUtil： uc>":V
uCr :+"C
package org.rut.util.algorithm; $niG)@*
k-Yli21-/|
import org.rut.util.algorithm.support.BubbleSort; M ui\E
import org.rut.util.algorithm.support.HeapSort; 9Vru,7g
import org.rut.util.algorithm.support.ImprovedMergeSort; D3B]
import org.rut.util.algorithm.support.ImprovedQuickSort; W#P`Y< u$
import org.rut.util.algorithm.support.InsertSort; PU,%Y_xR
import org.rut.util.algorithm.support.MergeSort; lvsj4cT
import org.rut.util.algorithm.support.QuickSort; r~z'QG6v/
import org.rut.util.algorithm.support.SelectionSort; =%B5TBG
import org.rut.util.algorithm.support.ShellSort; dEZUK vo
;1HzY\d%<
/** `*l aUn
* @author treeroot byFO^pce
* @since 2006-2-2 Y4C<4L?
* @version 1.0 L>h|1ZK
*/ lA pZC6Iwk
public class SortUtil { YF)]B|I
public final static int INSERT = 1; Gp{,v
public final static int BUBBLE = 2; Cz)&R^
public final static int SELECTION = 3; 6O<UW.
public final static int SHELL = 4; kO5lLqE
public final static int QUICK = 5; %q}[ZD/HD
public final static int IMPROVED_QUICK = 6; PY;tu#W!%
public final static int MERGE = 7; ua)jGif
public final static int IMPROVED_MERGE = 8; $AT@r"
public final static int HEAP = 9; zak|* _
vK%*5
public static void sort(int[] data) { '4nJ*Xa
sort(data, IMPROVED_QUICK); ~nTj't2R
} b[GhI+_
private static String[] name={ lLp,sNAj
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :r@t'
}; `% QvCAR
-72EXO=|
private static Sort[] impl=new Sort[]{ 1~'jC8&J
new InsertSort(), 9vz\R-un
new BubbleSort(), cGiL9|k
new SelectionSort(), *f3StX
new ShellSort(), +J|H~`
new QuickSort(), pB4Uc<e
new ImprovedQuickSort(), @)BO`;*$fF
new MergeSort(), WR3,woo
new ImprovedMergeSort(), m`l9d4p w?
new HeapSort() hJ$9Hb
}; M+0PEf.
\nt~K}a
public static String toString(int algorithm){ )q[P&f(h
return name[algorithm-1]; {9yf0n
} BY.k.]/
m`9nDiV
public static void sort(int[] data, int algorithm) { f4fBUZ^ A
impl[algorithm-1].sort(data); f-G)pHm
} #R{>@]x`
3*& Y'/!
public static interface Sort { 0:`|T jf_
public void sort(int[] data); KW(a@X
} +i!5<nn
wS);KLe3
public static void swap(int[] data, int i, int j) { CVWT>M<
int temp = data; ."H;bfcL_
data = data[j]; ICb!AsL
data[j] = temp; v,S5C
} &s='$a;4
} UWF \Vx*)b