[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; }'5MK
} niiA7Ux
int i1=l; 3YeG$^y"
int i2=mid+1; >] qc-{>&
for(int cur=l;cur<=r;cur++){ xN>npP
if(i1==mid+1) )mI05
data[cur]=temp[i2++]; N/[p <
else if(i2>r) aFc1|.Nm
data[cur]=temp[i1++]; dah[:rP,n{
else if(temp[i1] data[cur]=temp[i1++]; Yw22z #K
else G[B=>Cy
data[cur]=temp[i2++]; 2`AY~i9
} 0v6)t.]s
} iMt:9|yF}8
_ ?TN;
} d4m=0G`
wJg1Y0nh
改进后的归并排序: ~{*7"o/
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package org.rut.util.algorithm.support; +y,T4^{
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import org.rut.util.algorithm.SortUtil; HvUxsdT
&w4?)#
/** g-qP;vy@"q
* @author treeroot anuL1fXO
* @since 2006-2-2 osciZ'~
* @version 1.0 TSA,WP\
*/ :fKl]XO
public class ImprovedMergeSort implements SortUtil.Sort { ,V'o4]H
jy7\+i
private static final int THRESHOLD = 10; v.\*./-i
sD<a+Lw}x
/* fTzvmC:g7
* (non-Javadoc) oYHj~t
* @<<<C?CTv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $JSL-NkE
*/ -T!f,g3vW
public void sort(int[] data) { gep;{G}
int[] temp=new int[data.length]; RFKtr
mergeSort(data,temp,0,data.length-1); yZd +^QN
} \:R%4w#Jv
kTKq/G,Ft
private void mergeSort(int[] data, int[] temp, int l, int r) { #1J &7F1
int i, j, k; ,?PTcQF
int mid = (l + r) / 2; YX%[ipgB
if (l == r) U -Y03
return; 85lCj-cs
if ((mid - l) >= THRESHOLD) %lL.[8r|
mergeSort(data, temp, l, mid); tM2)k+fg
else tzZ63@cm
insertSort(data, l, mid - l + 1); 3WN`y8l
if ((r - mid) > THRESHOLD) /`9sPR6e
mergeSort(data, temp, mid + 1, r); {-ZFp
else MRQ.`IoS
insertSort(data, mid + 1, r - mid); UYFwS/ RW}
Y_}mYvJW
for (i = l; i <= mid; i++) { rL/H2[d
temp = data; Gn&-X]Rrl
} ^L0d/,ik
for (j = 1; j <= r - mid; j++) { o5xAav"+>
temp[r - j + 1] = data[j + mid]; :iFIQpk
} #u2J;9P
int a = temp[l]; nv)2!mAh\
int b = temp[r]; @|LBn6q
for (i = l, j = r, k = l; k <= r; k++) { %509\;el
if (a < b) { 3Uqr,0$p
data[k] = temp[i++]; 'iy*^A `Y
a = temp; ;_8#f%Y#R
} else { dlU'2Cl7d
data[k] = temp[j--]; MzPzqm<
b = temp[j]; qe#P?[
} GRMiQa
} Jm|+-F@I
} ?!wgH9?8
wpN k+;
/** ZPc@Zr`z
* @param data $f,n8]
* @param l *J$=.fF1
* @param i Av?2<
*/ VmCW6 G#M
private void insertSort(int[] data, int start, int len) { !(qsD+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GQ*wc?f3
} :}r.
} ~)qtply
} tBNoI
} _nD$b={g
cHcmgW\4
堆排序： bgS${n/
FW) x:2BG
package org.rut.util.algorithm.support; Gq_-Val]"
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import org.rut.util.algorithm.SortUtil; cUqke+!
<cZGxff01
/** $KUos+%
* @author treeroot IGS1|
* @since 2006-2-2 }K1JU`Lz
* @version 1.0 on0]vEE
*/ 4&xZ]QC)O5
public class HeapSort implements SortUtil.Sort{ 1^_U;O:I
4 SHU
/* (non-Javadoc) A 6OGs/:&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *5 |)-E
*/ CqHK%M
public void sort(int[] data) { \\{J'j>{f
MaxHeap h=new MaxHeap(); 5nTY ?<x`k
h.init(data); #Y0-BYa^
for(int i=0;i h.remove(); @Ys!DScY,
System.arraycopy(h.queue,1,data,0,data.length); [01.\eh
} TT50(_8
&LF` W
private static class MaxHeap{ TpmwD{c[\
bV edFm
void init(int[] data){ cE`6uq7p
this.queue=new int[data.length+1]; S!Omy:=;i
for(int i=0;i queue[++size]=data; %{(x3\ *&
fixUp(size); e{X6i^% m_
} 1x@qkL6
} |}{B1A
|+35y_i6
private int size=0; <'fdkW
: p{+G
private int[] queue; Ma'_e=+A
CT KG9 T
public int get() { NE/m-ILw
return queue[1]; W%.v.0
} fV v.@HL{
pl5P2&k
public void remove() { ?OE.O/~l
SortUtil.swap(queue,1,size--); :(a]V"(&Eq
fixDown(1); |o2sbLp
} !L;\cl
file://fixdown 4Ue_Y'LmM
private void fixDown(int k) { Xg=x7\V
int j; G0`h%
while ((j = k << 1) <= size) { za:a)U^n
if (j < size %26amp;%26amp; queue[j] j++; ot`%*
if (queue[k]>queue[j]) file://不用交换 :}h>by=
break; }w/;){gu
SortUtil.swap(queue,j,k); cFN'bftH4
k = j; ) c/% NiN
} (]RM6i7
} ~`GhS<D
private void fixUp(int k) { K]qM~v<A
while (k > 1) { zF@o2<cD@
int j = k >> 1; gP-nluq
if (queue[j]>queue[k]) rUlS'L;$"
break; b1gaj"]
SortUtil.swap(queue,j,k); g ^!C
k = j; C@Nv;;AlU
} 8 F2|
} ^9_UUzf\
l{:a1^[>y
} xrqv@/kJ
/w8"=6Vv~
} &m {kHM
tM,%^){p$
SortUtil： ESg+n(R
rZojY}dWJ
package org.rut.util.algorithm; WKpA|
dl5=q\1=
import org.rut.util.algorithm.support.BubbleSort; QN>7~=`
import org.rut.util.algorithm.support.HeapSort; Y4F6qyP)"
import org.rut.util.algorithm.support.ImprovedMergeSort; MlJVeod
import org.rut.util.algorithm.support.ImprovedQuickSort; '~ 4pl0TWc
import org.rut.util.algorithm.support.InsertSort; EQIUSh)M
import org.rut.util.algorithm.support.MergeSort; oyk>vIZ
import org.rut.util.algorithm.support.QuickSort; R0;efD
import org.rut.util.algorithm.support.SelectionSort; 1z*kc)=JF8
import org.rut.util.algorithm.support.ShellSort; $&Kq*m 0g
>r)X:K+I
/** v8/6wy?
* @author treeroot |!H?+Jj:
* @since 2006-2-2 ?-OPX_i_
* @version 1.0 F52B~@.
*/ 9p@C4oen
public class SortUtil { zSv^<`X3
public final static int INSERT = 1; [4+q+
public final static int BUBBLE = 2; 6P`)%zj
public final static int SELECTION = 3; $P: O/O=>
public final static int SHELL = 4; g,]@4|
public final static int QUICK = 5; J^m<*
public final static int IMPROVED_QUICK = 6; 9 L?;FY)_
public final static int MERGE = 7; Y-~~,Yl~
public final static int IMPROVED_MERGE = 8; Nf9fb?
public final static int HEAP = 9; rS*$rQCr=
u-DK_^v4M
public static void sort(int[] data) { O'NW Ebl/
sort(data, IMPROVED_QUICK); {13!vS%5
} IeF keE
private static String[] name={ VY+>=!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8cm@a*2%
}; 9.M{M06;
$R^AEa7
private static Sort[] impl=new Sort[]{ :Dl%_l
new InsertSort(), +&ZX$
new BubbleSort(), NvtM3
new SelectionSort(), 0y%L-:/c|
new ShellSort(), !rTmR@e$/
new QuickSort(), ])y{BlZ
new ImprovedQuickSort(), m-1?\bs
new MergeSort(), o;`!kIQ
new ImprovedMergeSort(), b>cafu
new HeapSort() ~%y\@x7I
}; `1p 8C%
$W!]fcZlB
public static String toString(int algorithm){ K5ZnS`c;
return name[algorithm-1]; D\]&8w6&
} 3;$bS<>
X<MpN5%|Wo
public static void sort(int[] data, int algorithm) { +lp{#1q0
impl[algorithm-1].sort(data); C?H{CP
} WPY8C3XO
RfbdBsL
public static interface Sort { LXhaD[1Rb
public void sort(int[] data); <jd/t19DB
} 'M%5v'$y
gM_:l
public static void swap(int[] data, int i, int j) { rB]W,8~%
int temp = data; /)1v9<vM"
data = data[j]; e)pTC97^L
data[j] = temp; 4DML
} 3@X7YgILU
} aR(E7mXQ