[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; GPONCL8(0
} E2 Q[
int i1=l; yS^";$2Tc
int i2=mid+1; /x c<&
for(int cur=l;cur<=r;cur++){ oM G8?p
if(i1==mid+1) R9A8)dDz
data[cur]=temp[i2++]; ",!#7h
else if(i2>r) (dd+wx't
data[cur]=temp[i1++]; x4r8^,K3Zn
else if(temp[i1] data[cur]=temp[i1++]; ;PCnEs
else NoTEbFrV
data[cur]=temp[i2++]; 4zkn~oy
} _PLY<i2vr
} {_&'tXL
]v(8i3P84
} X;lL$
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改进后的归并排序: x$Y44v'>
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package org.rut.util.algorithm.support; sD H^l)4h
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import org.rut.util.algorithm.SortUtil; s6bILz-u
b`){f\#t
/** K1>X%f^
* @author treeroot 5\gL+qM0
* @since 2006-2-2 D99g}
* @version 1.0 `%IzW2v6
*/ @}eEV[Lli
public class ImprovedMergeSort implements SortUtil.Sort { +;^UxW
xP#vAR
private static final int THRESHOLD = 10; t2skg
ZUePHI-dP
/* Q97F5ru6
* (non-Javadoc) ,n<t':-
* 'n4Ro|kA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'w3BSaJi
*/ nr7#}pzo
public void sort(int[] data) { Yv<'QC
int[] temp=new int[data.length]; ]L+YnZ?6
mergeSort(data,temp,0,data.length-1); PP)iw@9j
} QK%Nt
Uc%n{ a-a
private void mergeSort(int[] data, int[] temp, int l, int r) { ,5!&}
int i, j, k; +`tl<rg;
int mid = (l + r) / 2; zx` %)r
if (l == r) l r80RL'_
return; Ne<={u%
if ((mid - l) >= THRESHOLD) 'NJGez'b,
mergeSort(data, temp, l, mid); '!eg9}<
else !"1}zeve
insertSort(data, l, mid - l + 1); B7PkCS&X
if ((r - mid) > THRESHOLD) KYE)#<V}@
mergeSort(data, temp, mid + 1, r); `_%UK=m
else HYcLXhvgu
insertSort(data, mid + 1, r - mid); EQe!&;
\WS2g"(
for (i = l; i <= mid; i++) { }L mhM
temp = data; !dnCrR
} g)0>J
for (j = 1; j <= r - mid; j++) { ~o{GQ>
temp[r - j + 1] = data[j + mid]; F.{{gpI
} < z':_,
int a = temp[l]; V"Cx5#\7C
int b = temp[r]; I(^pIe-
for (i = l, j = r, k = l; k <= r; k++) { {1?94rz
if (a < b) { U*sjv6*T
data[k] = temp[i++]; w`BY>Xft0
a = temp; )/HbmtXqI
} else { KLb"_1z
data[k] = temp[j--]; MWdev.m:Z
b = temp[j]; L& =a(
} }9:(l
} o;'E("!<Z
} S]!s)q-- z
(=A61]yB
/** grD[7;1~:)
* @param data ga?:k,xv
* @param l 6HroKu
* @param i 6U.A/8z
*/ OaTnQ|*
private void insertSort(int[] data, int start, int len) { jej.!f:H
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V52>K$j
} @JW HG1qJ
} (g" {A
} &f=O`*I'+!
} NS<C"O
:1*q}R
堆排序： F u>
su$IXI#R-&
package org.rut.util.algorithm.support; .7K)'
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import org.rut.util.algorithm.SortUtil; <`$svM
dU}Cb?]7s
/** m+UWvUB)
* @author treeroot mXYG^}
* @since 2006-2-2 !dQmg'_V
* @version 1.0 RWg'W,v=!
*/ o3"Nxq"U
public class HeapSort implements SortUtil.Sort{ c,2OICj
>jU25"XI[
/* (non-Javadoc) mjQZ"h0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZUyS+60
*/ @m5c<(bkfp
public void sort(int[] data) { vjL +fH<0:
MaxHeap h=new MaxHeap(); ~'V&[]nh8
h.init(data); nt&"? /s
for(int i=0;i h.remove(); 5cvvdO*C0
System.arraycopy(h.queue,1,data,0,data.length); )[S#:PP
} xTU;rJV
lfAiW;giJ
private static class MaxHeap{ Vp7d
)x,/+R]{8l
void init(int[] data){ pCf9"LLer
this.queue=new int[data.length+1]; _Sg"|g
for(int i=0;i queue[++size]=data; z`qb>Y"xf3
fixUp(size); XDYQV.Bv
} KE4#vKV0yC
} &^UT
Jc7}z:UB
private int size=0; 4tEAi4H|`@
<~*[OwN
private int[] queue; 0ijYE
4@+']vN4
public int get() { DfU]+;AE
return queue[1]; =P9Tc"2PN
} abAw#XQ8
~?4BP%g-y
public void remove() { gg/ts]$
SortUtil.swap(queue,1,size--); C hQ] d
fixDown(1); ? 'qyI^m@
} v, CWE
file://fixdown xk
private void fixDown(int k) { 3RX9LJGX
int j; TCFr-*x
while ((j = k << 1) <= size) { (q0vql
if (j < size %26amp;%26amp; queue[j] j++; %Z+**>1J
if (queue[k]>queue[j]) file://不用交换 m^\&v0
break; <-mhz`^
SortUtil.swap(queue,j,k); NBXhcfF
k = j; 9[`c"Pd
} Lu~E5 ,
} 6g\hQ\+Z}
private void fixUp(int k) { $|g ;
while (k > 1) { HOx+umjxW
int j = k >> 1; diNAT`|?#
if (queue[j]>queue[k]) .p]rS =#
break; Dpwqg3,
SortUtil.swap(queue,j,k); #K`0b$
k = j; fLpWTkr0
} ek.@ 0c
} rq^%)tR
=k*XGbU
} mr2Mu
[K@(,/$
} c|d,:u#
'7pzw>E=:
SortUtil： @eZBwFe
qX`Hi9ja
package org.rut.util.algorithm; }VRl L>HAC
oB%_yy+
import org.rut.util.algorithm.support.BubbleSort; &qK:LHhj
import org.rut.util.algorithm.support.HeapSort; : h(Z\D_
import org.rut.util.algorithm.support.ImprovedMergeSort; gkX7,J-0
import org.rut.util.algorithm.support.ImprovedQuickSort; 6yBd9=3K
import org.rut.util.algorithm.support.InsertSort; Z^}[CQ&Am
import org.rut.util.algorithm.support.MergeSort; {/(.Bpld
import org.rut.util.algorithm.support.QuickSort; (t\U5-w
import org.rut.util.algorithm.support.SelectionSort; IRdR3X56
import org.rut.util.algorithm.support.ShellSort; 6O/c%1VHA3
*Ojl@N
/** L+VQtp&"
* @author treeroot ?E_;[(Mcr
* @since 2006-2-2 nbB*d@"
* @version 1.0 sYo&@~T
*/ 7AS_Aw1L
public class SortUtil { 98)C 7N'
public final static int INSERT = 1; xmEom
public final static int BUBBLE = 2; Fw*O ciC
public final static int SELECTION = 3; 2y \ogF
public final static int SHELL = 4; w[D]\>QHa
public final static int QUICK = 5; *7-rm
public final static int IMPROVED_QUICK = 6; }zS5o [OE
public final static int MERGE = 7; H] g=( %ok
public final static int IMPROVED_MERGE = 8; 0{uaSR
public final static int HEAP = 9; 9R2"(.U
/Wcx%P
public static void sort(int[] data) { @tPr\F
sort(data, IMPROVED_QUICK); ?G,gPb
} .j&#
private static String[] name={ Qclq^|O0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Y8^WuN$
}; _G-y{D_S&
RjH68=n
private static Sort[] impl=new Sort[]{ dWQB1Y*N
new InsertSort(), !V(r p80
new BubbleSort(), '.;{"G.@'
new SelectionSort(), _~MX~M3MB
new ShellSort(), wPm
new QuickSort(), |`Noj+T47I
new ImprovedQuickSort(), \'<P~I&p
new MergeSort(), t$~'$kM)<
new ImprovedMergeSort(), /:Gy .
new HeapSort() 'e' p`*
}; 7i{(,:
*Ow2,{Nn
public static String toString(int algorithm){ W;cYg.W2
return name[algorithm-1]; tk*-Cx?_
} Ncsh{.
;9WUt,R
public static void sort(int[] data, int algorithm) { W7b m}JHn
impl[algorithm-1].sort(data); $2}#):`
} p}h.2)PO
:\qapFV
public static interface Sort { \o/eF&
public void sort(int[] data); M2w'cdHk
} I#M>b:"te
Dw7Xy}I/
public static void swap(int[] data, int i, int j) { \>pm (gF
int temp = data; QK#wsw
data = data[j]; nw%9Qw
data[j] = temp; p/RT*?<
} 'Etq;^H
} (xN1?qXB.