[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; '69ZdP/xX
} &MgeYpd
int i1=l; \hP=-J[~C
int i2=mid+1; @TA9V@?)
for(int cur=l;cur<=r;cur++){ +|%Sx
if(i1==mid+1) ])#\_'fg
data[cur]=temp[i2++]; %im#ww L%
else if(i2>r) ,rwuy[Q8
data[cur]=temp[i1++]; '!Kf#@';u
else if(temp[i1] data[cur]=temp[i1++]; xq-$\#O
else nxap\Lf
data[cur]=temp[i2++]; $ Cjk
} FkupO [KI
} AdoZs8Q
;}.Kb
} {sv{847V
rp:wQH7
改进后的归并排序: F X1ZG!
f|aDTWF
package org.rut.util.algorithm.support; VzRx%j/i
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import org.rut.util.algorithm.SortUtil; D;F{1[s(
#S+Z$DQD
/** L8vOBI7N
* @author treeroot -#A:`/22
* @since 2006-2-2 4`2$_T$F
* @version 1.0 P8gXCX!>U
*/ gKb0)4 AK
public class ImprovedMergeSort implements SortUtil.Sort { K,}w]b
~%|G+m>
private static final int THRESHOLD = 10; g.#+z'l
lg:y|@Y''
/* {R&ZqEo'D
* (non-Javadoc) ;? uC=o>Z{
* a%J6f$A#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vU/ D7
*/ FX,$_:f6Y
public void sort(int[] data) { I8op>^N"
int[] temp=new int[data.length]; C@HD(..#
mergeSort(data,temp,0,data.length-1); U06o;s(
} EH+~].PJd
Dd2Lx&9
private void mergeSort(int[] data, int[] temp, int l, int r) { "t&{yBQ0u
int i, j, k; KLt%[$CTi
int mid = (l + r) / 2; ij&p4
if (l == r) td(M#a-
return; VKLU0*2R
if ((mid - l) >= THRESHOLD) ~j,TVY
mergeSort(data, temp, l, mid); BSp$F WvT?
else Q)Dwq?
insertSort(data, l, mid - l + 1); +~|AT+|iI
if ((r - mid) > THRESHOLD) 1}`LTPW9
mergeSort(data, temp, mid + 1, r); RyRqH:p)3
else ~' =lou
insertSort(data, mid + 1, r - mid); voRfjsS~
":d*dl
for (i = l; i <= mid; i++) { jgvh[@uB?
temp = data; :?r*p>0$
} (@ea|Fd#4
for (j = 1; j <= r - mid; j++) { g^o_\hp
temp[r - j + 1] = data[j + mid]; gf$HuCh|
} It 2UfW
int a = temp[l]; qZG-Lh
int b = temp[r]; 4&}\BU*
for (i = l, j = r, k = l; k <= r; k++) { U %:c],Fk
if (a < b) { i1/}XV
data[k] = temp[i++]; 12r` )
a = temp; 4NVgOr:
} else { &?$\Y,{
data[k] = temp[j--]; Cals?u#U=
b = temp[j]; B {i&~k
} Tj,Nmb>Q7'
} g+Ph6W
} h1%y:[_
?\yB)Nd y
/** \!X?zR_
* @param data j3P RAe
* @param l Rx. rj~
* @param i tmxPOe
*/ BpXEK.Xw
private void insertSort(int[] data, int start, int len) { HRRngk#lV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f0F#Yi{fw
} VA]ZR+m
} @bQ!zCI
} k`IrZHMw
} E2yz=7sv5
G(i\'#5+
堆排序： lZ~+u
*#ompm
package org.rut.util.algorithm.support; ucFw,sB1
r|8V @.@i
import org.rut.util.algorithm.SortUtil; x\;GoGsez
3Bd4 C]E
/** H5q:z=A
* @author treeroot Nzc>)2% N
* @since 2006-2-2 59qnEIi
* @version 1.0 GHrBK&
*/ |2UauTp5yK
public class HeapSort implements SortUtil.Sort{ HU3Vv<lz
bf^ly6ml
/* (non-Javadoc) uf0^E3H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V9$-twhu
*/ .5k^f5a
public void sort(int[] data) { M7H~;S\3IM
MaxHeap h=new MaxHeap(); xucIjPi]
h.init(data); .%hQJ{vf-^
for(int i=0;i h.remove(); B=x~L
System.arraycopy(h.queue,1,data,0,data.length); T.euoFU{Z
} k*9%8yi_ U
3z$\&& BR
private static class MaxHeap{ ks^|>
0- Yeu5A
void init(int[] data){ $pBr &,
this.queue=new int[data.length+1]; (jneEo=vr
for(int i=0;i queue[++size]=data; { ;' :h
fixUp(size); s_` V*`n&
} ^*zW"s
} B$EK_@M
IHfSkFz`j
private int size=0; )ldUayJ
r?XDvU
private int[] queue; XDvq7ZD
,9$>d}N
public int get() { Lj-{t% }
return queue[1]; 'XME?H:q a
} z7$}#)Z7
1uj05aZh}
public void remove() { c; d"XiA
SortUtil.swap(queue,1,size--); $u-lo|
fixDown(1); 1o)=GV1
} )muv;Rf`e5
file://fixdown yL4 -4
private void fixDown(int k) { ?-M)54b\
int j; Cg?I'1]o6
while ((j = k << 1) <= size) { K;kLQ2)
if (j < size %26amp;%26amp; queue[j] j++; {)jk_&c7
if (queue[k]>queue[j]) file://不用交换 }W)Mwu'W
break; _/8y1)I
SortUtil.swap(queue,j,k); (T`q++
k = j; y#GCtkhi
} )[RpZpd`*
} \j/}rzo]
private void fixUp(int k) { )uuwwz
while (k > 1) { xP{m9_Qj
int j = k >> 1; KXDz'9_
if (queue[j]>queue[k]) ,$SkaTBe
break; <y'qo8oqF
SortUtil.swap(queue,j,k); } pSt@3o,
k = j; N)Qlkz$X
} ^w ]1qjGw
} jBGG2[hV
O\:;q*]
} Y~}QJ+`?
.M`LUb"!
} SSo~.)J
xBt4~q;#sE
SortUtil： xg4T` ])
}$&);7(w
package org.rut.util.algorithm; =54Vs8.
)OS>9 kFH
import org.rut.util.algorithm.support.BubbleSort; .Lp Nm'=R
import org.rut.util.algorithm.support.HeapSort; d"Ml^rAn
import org.rut.util.algorithm.support.ImprovedMergeSort; )62q|c9F
import org.rut.util.algorithm.support.ImprovedQuickSort; eF*TLI<[^I
import org.rut.util.algorithm.support.InsertSort; qLu8!|QT
import org.rut.util.algorithm.support.MergeSort; }b<87#Nb9R
import org.rut.util.algorithm.support.QuickSort; ArLz;#AOn
import org.rut.util.algorithm.support.SelectionSort; yg.\^C
import org.rut.util.algorithm.support.ShellSort; wZ}n3R,
u_hE7#i
/** yDDghW'\WU
* @author treeroot dW:w<{a!R
* @since 2006-2-2 T;xHIg4
* @version 1.0 Bl:{p>-q
*/ F?!};~$=Z
public class SortUtil { fB@K'JQG
public final static int INSERT = 1; nA|gQibA
public final static int BUBBLE = 2; kwDjK"
public final static int SELECTION = 3; GC,vQ\
public final static int SHELL = 4; ?T$*5d
public final static int QUICK = 5; 5>0\e_V
public final static int IMPROVED_QUICK = 6; 0]/,m4a#n
public final static int MERGE = 7; 5?S{W
public final static int IMPROVED_MERGE = 8; :4Id7Ce
public final static int HEAP = 9; _wIBm2UO
&*LA_]1@
public static void sort(int[] data) { Y8{T.\%\+
sort(data, IMPROVED_QUICK); >}xAg7\^
} w50.gr7
private static String[] name={ OYQXi
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?*(r1grHl
}; ptnMCF
sj?`7kg
private static Sort[] impl=new Sort[]{ A8CIP:Z
new InsertSort(), V!jK3vc
new BubbleSort(), _3-RoA'UZr
new SelectionSort(), 5(mCBH
new ShellSort(), 3J'Bm"
new QuickSort(), ,k`YDy|#e
new ImprovedQuickSort(), m? ]zomP
new MergeSort(), Ncs4<"{$
new ImprovedMergeSort(), ?HEo9/ *7
new HeapSort() '2Mjz6mBDA
}; Wo<PmSt9i
({ :yw
public static String toString(int algorithm){ .YnP%X=
return name[algorithm-1]; ~5XL@jI^
} 8YT_DM5iI
.x\/XlM
public static void sort(int[] data, int algorithm) { 6:SK{RSURC
impl[algorithm-1].sort(data); ;p?42rCIcl
} BWqik_
[MSDk"o&
public static interface Sort { S|O%h}AH;
public void sort(int[] data); *Xf[b)FR
} QSl:=Q'
_>Pe]3
public static void swap(int[] data, int i, int j) { c,{&
int temp = data; sM);gI14
data = data[j]; +aXMHT"U
data[j] = temp; pGZl.OI
} |e.3FjTH
} T7WZ(y 3C