[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; bn$a7\X-
} ffDh0mDN
int i1=l; E$!0h_.(
int i2=mid+1; nM]Sb|1:
for(int cur=l;cur<=r;cur++){ -!w({rP
if(i1==mid+1) YB?yi( "yL
data[cur]=temp[i2++]; J" :R,w`
else if(i2>r) v',%
data[cur]=temp[i1++]; R<wPO-dX
else if(temp[i1] data[cur]=temp[i1++]; Ed6k7
else e\o>(is
data[cur]=temp[i2++]; }_,1i3Rip
} W%$sA}O
} Q[sj/
i b$2qy
} fH{ _X
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改进后的归并排序: >|[ l?`
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package org.rut.util.algorithm.support; woI.1e5
^xz*%2@
import org.rut.util.algorithm.SortUtil; ~\uI&S5
R1A|g=kF
/** b{X,0a{*
* @author treeroot 6yU#;|6d
* @since 2006-2-2 |t<Uh,Bt
* @version 1.0 /<"<N<X
*/ VR:4|_o
public class ImprovedMergeSort implements SortUtil.Sort { xcf`i:\
_6O\*|'6
private static final int THRESHOLD = 10; _c:}i\8R
G%Dhj)2}
/* p>9-Ga
* (non-Javadoc) {c|{okQ;Q
* V@%:y tDf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O:G5n 5J
*/ `?M?WaP
public void sort(int[] data) { p1}m_
int[] temp=new int[data.length]; ]|6)'L&]*s
mergeSort(data,temp,0,data.length-1); b"JJ3$D
} uu5L9.i9
(j>a?dKDS
private void mergeSort(int[] data, int[] temp, int l, int r) { MTyBGrs(
int i, j, k; :_,oD
int mid = (l + r) / 2; yDl{18~zv
if (l == r) nogdOGo
return; Uxll<z,
if ((mid - l) >= THRESHOLD) yAyq-G"sO
mergeSort(data, temp, l, mid); <Sn;k[M}d
else S!Z2aFj
insertSort(data, l, mid - l + 1); ^*-6PV#Z
if ((r - mid) > THRESHOLD) 6!&DH#M
mergeSort(data, temp, mid + 1, r); r:xbs0 7
else cJ^:b4j
insertSort(data, mid + 1, r - mid); JJE3\
T ?HG}(2
for (i = l; i <= mid; i++) { j*7#1<T
temp = data; -9f+O^x
} 4ju=5D];
for (j = 1; j <= r - mid; j++) { 7~f"8\
temp[r - j + 1] = data[j + mid]; ,\]`X7r
} WciL zx/
int a = temp[l]; )fGIe rS
int b = temp[r]; 3 *g>kRMJ
for (i = l, j = r, k = l; k <= r; k++) { [p:mja.6y
if (a < b) { |L}1@0i
data[k] = temp[i++]; )0\"8}!
a = temp; |``rSEXYs
} else { L9"yQD^R7?
data[k] = temp[j--]; gS VWv9+
b = temp[j]; 78u9> H
} iYPlgt/Y!
} }HLs.k4-;
} eI@nskq#
@Q%9b)\\
/** KFuPgp
* @param data ^F="'/Pq[
* @param l dm:2:A8^
* @param i dX^d\ wX
*/ ;"R1>tw3)
private void insertSort(int[] data, int start, int len) { K6BP~@H_D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }M0GPpv
} g]mR;T3
} rYn)E=FG/
} *ydh.R<hb
} C)z?-f
J^y}3ON
堆排序： -u nK;
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package org.rut.util.algorithm.support; %@,! (
~'.SmXZs
import org.rut.util.algorithm.SortUtil; WBd$#V3
uH.1'bR?a
/** ?LAiSg=eq
* @author treeroot eE0'3?q(
* @since 2006-2-2 rm5@dM@
* @version 1.0 3ss0/\3P
*/ W{l{O1,
public class HeapSort implements SortUtil.Sort{ 4^IqHx;bj
J=`2{ 'l
/* (non-Javadoc) Rk$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CTP!{<ii
*/ -TT{4\%s
public void sort(int[] data) { YLU.]UC
MaxHeap h=new MaxHeap(); . l>.
h.init(data); %p}xW V.
for(int i=0;i h.remove(); \b6vu^;p
System.arraycopy(h.queue,1,data,0,data.length); AK_,$'f
} ]ME2V
5\jzIB_?
private static class MaxHeap{ ZQ)vvD<
7 ~9Lj
void init(int[] data){ pl.x_E,HP
this.queue=new int[data.length+1]; Sa 8T'%W
for(int i=0;i queue[++size]=data; S0]JeP+3!
fixUp(size); |e+r|i]
} 0/4"Jh$t
} cGUsao
}xb?C""q^q
private int size=0; zPyN2|iFah
}9*NEU)o
private int[] queue; {=Z _L?j
m2j]wUh"
public int get() { &0k`=?v$
return queue[1]; d cG)ql4d
} %h9'kJzNk
t^|GcU]
public void remove() { .:(T}\]R
SortUtil.swap(queue,1,size--); r=4vN=:
fixDown(1); *!c&[- g
} ,w|Or}h]7
file://fixdown x4Wu`-4^
private void fixDown(int k) { wN2D{Jj
int j; zS/1v+
while ((j = k << 1) <= size) { VC.zmCglo^
if (j < size %26amp;%26amp; queue[j] j++; XbYST%|.
if (queue[k]>queue[j]) file://不用交换 Q*W$!ZUT
break; mFx\[S
SortUtil.swap(queue,j,k); R\Of ,
k = j; r-'CB
} Xwz'h;Ks_
} /1z3Q_M
private void fixUp(int k) { r=cm(AHF
while (k > 1) { 9?Q0O\&uP
int j = k >> 1; E(miQ
if (queue[j]>queue[k]) #8CeTR23cw
break; d]I3zSIC
SortUtil.swap(queue,j,k); i~i ?M)
k = j; >mUSRf4
} lDVw2J'p
} }Q-%ij2
^tRy6zG
} l",X
16|miK[@
} iL8:I)z
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SortUtil： CSVL,(Uw
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package org.rut.util.algorithm; 2=`}:&0l
bS&XlgnKi
import org.rut.util.algorithm.support.BubbleSort; G@8wv J
import org.rut.util.algorithm.support.HeapSort; X 3(CY`HH[
import org.rut.util.algorithm.support.ImprovedMergeSort; )=Ens=>Z
import org.rut.util.algorithm.support.ImprovedQuickSort; C)(/NGf
import org.rut.util.algorithm.support.InsertSort; !9]q+XefJ
import org.rut.util.algorithm.support.MergeSort; c-`izn]
import org.rut.util.algorithm.support.QuickSort; V[^+lR
import org.rut.util.algorithm.support.SelectionSort; !JnxNIr&i|
import org.rut.util.algorithm.support.ShellSort; ewOe A|
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/** ?O.'_YS
* @author treeroot 8umW>
* @since 2006-2-2 (RafidiH
* @version 1.0 30<3DA_P
*/ Q4B(NYEu(
public class SortUtil { H|I.h{:
public final static int INSERT = 1; n<3{QqF
public final static int BUBBLE = 2; DP08$Iq
public final static int SELECTION = 3; >goG\y
public final static int SHELL = 4; 9ohO-t$XkY
public final static int QUICK = 5; ot; ]?M
public final static int IMPROVED_QUICK = 6; SS7C|*-Zd
public final static int MERGE = 7; $m[*)0/
public final static int IMPROVED_MERGE = 8; 5-.{RU=
public final static int HEAP = 9; VmP5`):?b
/ULO#CN?;
public static void sort(int[] data) { $LHF=tYS
sort(data, IMPROVED_QUICK); 7i0;Ss*
} Gi Max
private static String[] name={ ~M9&SDT/lB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ; -,VJCPi
}; }c,:uN
;wF)!d
private static Sort[] impl=new Sort[]{ ~=/.ZUQNX
new InsertSort(), !I+F8p
new BubbleSort(), Np>0c-S
new SelectionSort(), k!ac_}&NNv
new ShellSort(), |3dIq=~1"Y
new QuickSort(), k56*eEc
new ImprovedQuickSort(), i/aj;t
new MergeSort(), o!sHK9hvJ)
new ImprovedMergeSort(), TSKR~3D#
new HeapSort() 4mwLlYZ
}; }cd-BW
ROj9#:
public static String toString(int algorithm){ r`A|2(h5B
return name[algorithm-1]; 4\iy{1{E,C
} a @i?E0Fr
O_^ uLp
public static void sort(int[] data, int algorithm) { ^)S<Ha
impl[algorithm-1].sort(data); @i=_y+|d_
} uE^5o\To
oRQ(l I>
public static interface Sort { m:5x"o7)ln
public void sort(int[] data); vg-'MG
} Dac ,yW
>+F +"NAN
public static void swap(int[] data, int i, int j) { 9ve)+Lk
int temp = data; R/ 3#(5
data = data[j]; H':0
data[j] = temp; bw*D!mm,
} ~'t+X
} c'uDK>