[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; CpTjJXb
} 9hyn`u.
int i1=l; EfT=?
int i2=mid+1; CU!Dhm/U
for(int cur=l;cur<=r;cur++){ o ^uA">GH
if(i1==mid+1) }0y"F
data[cur]=temp[i2++]; `Urhy#LC
else if(i2>r) _|`S3}q|d
data[cur]=temp[i1++]; A@#E@;lm
else if(temp[i1] data[cur]=temp[i1++]; d&>^&>?$zh
else Tw<q,O
data[cur]=temp[i2++]; xskz)kk
} I7]8Y=xf
} '~ 47)fN
qf-8<{T
} <F'\lA9
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改进后的归并排序: {P-):
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package org.rut.util.algorithm.support; %(Icz?
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import org.rut.util.algorithm.SortUtil; uXiN~j &Be
k;Y5BB
/** `WS&rmq&'
* @author treeroot |N]XJ)?
* @since 2006-2-2 &7s.`
* @version 1.0 nJ;.Td
*/ +ZX{>:vo
public class ImprovedMergeSort implements SortUtil.Sort { B#R|*g:x
%z$#6?OK^
private static final int THRESHOLD = 10; G#$-1"!`
o+VQ\1as?(
/* ?V=CB,^
* (non-Javadoc) U$UIN#
* CvdN"k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2~2 O V
*/ q.}CU.dp
public void sort(int[] data) { 19] E 5'AI
int[] temp=new int[data.length]; Fk;Rfqq
mergeSort(data,temp,0,data.length-1); @(lh%@hO
} d_P` qA
u%!@(eKM-
private void mergeSort(int[] data, int[] temp, int l, int r) { D6Wa.,r
int i, j, k; +cRn%ioVi
int mid = (l + r) / 2; &M[?h}B6
if (l == r) QsW/X0YBv
return; uw8f ~:LT
if ((mid - l) >= THRESHOLD) \)Cl%Em
mergeSort(data, temp, l, mid); 8?C5L8)
else _VXN#@y
insertSort(data, l, mid - l + 1); tl>7^hH
if ((r - mid) > THRESHOLD) 4Po_-4
mergeSort(data, temp, mid + 1, r); S8gs-gL#Og
else Bbp|!+KP{(
insertSort(data, mid + 1, r - mid); *lb<$E]="!
W_ZJ0GuE(
for (i = l; i <= mid; i++) { >R=|Wo`Ri
temp = data; :E?V.
} :gC#hmm^
for (j = 1; j <= r - mid; j++) { `y0FY&y=
temp[r - j + 1] = data[j + mid]; FgO)DQm
} LgYq.>Nl9
int a = temp[l]; PI<vxjOK`
int b = temp[r]; !!ya
for (i = l, j = r, k = l; k <= r; k++) { wQLSf{2
if (a < b) { OrG).^l
data[k] = temp[i++]; tnIX:6
a = temp; |cY`x(?yP
} else { xezcAwW
data[k] = temp[j--]; 92-I~ !d
b = temp[j]; -']56o_sQ/
} .p$(ZH =~
} QCJM&
} DL.!G
v8DC21pb
/** .sA.C]f
* @param data BORA(,
* @param l w=@Dv
* @param i Vz[C=_m
*/ mcok/,/
private void insertSort(int[] data, int start, int len) { zn(PI3+]!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k_R"CKd
} tI{_y
} !%>7Dw(kt
} >i O!*&Y>
} Qei"'~1a
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堆排序： Q7A MRrN
P }uOJVQ_
package org.rut.util.algorithm.support; Cls%M5MH
i@CxI<1'
import org.rut.util.algorithm.SortUtil; Xry47a )
w*MpX U<
/** |WUG}G")*x
* @author treeroot Lh<).<S
* @since 2006-2-2 E~:x(5'%d
* @version 1.0 ]+$?u&0?w
*/ bJ;'`sw1
public class HeapSort implements SortUtil.Sort{ *\q d
'Z|mQZN
/* (non-Javadoc) 3yXY.>'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o8vug$=Z
*/ cs'{5!i]
public void sort(int[] data) { ri.I pRe
MaxHeap h=new MaxHeap(); a@*\o+Su
h.init(data); Xs?o{]Fe
for(int i=0;i h.remove(); 5 u0HI
System.arraycopy(h.queue,1,data,0,data.length); BF<ikilR
} 4a]P7fx-
?F;8Pa/
private static class MaxHeap{ IaXeRq?<
})?GzblI&
void init(int[] data){ ;w[0t}dPl
this.queue=new int[data.length+1]; K96<M);:g
for(int i=0;i queue[++size]=data; }>X~
fixUp(size); #1G:lhkC
} >e"#'K0?\
} :08,JL{
IB7E}56l
private int size=0; &JI8]JmU)
Z)aUt Srf
private int[] queue; ^`>/.gL
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public int get() { :[!j?)%>
return queue[1]; h2""9aP!
} \;"=QmRD%:
w*JGUk
public void remove() { d;}nh2*
SortUtil.swap(queue,1,size--); #ucBo<[
fixDown(1); & 9 ?\b7
} )%@J=&G8TT
file://fixdown j ?(&#
private void fixDown(int k) { 0=E]cQwh
int j; J~UuS+Ufv
while ((j = k << 1) <= size) { "!%l/_p?
if (j < size %26amp;%26amp; queue[j] j++; `lt"[K<
if (queue[k]>queue[j]) file://不用交换 ITT@,
break; ~O&:C{9=
SortUtil.swap(queue,j,k); J6FV]Gpv
k = j; ?m?::RH
} [mGLcg6Fw
} M1iS(x
private void fixUp(int k) { )f<z%:I+Z
while (k > 1) { u^qT2Ss0
int j = k >> 1; ah+iZ}E%
if (queue[j]>queue[k]) wx0j(:B]
break; X*@dj_,
SortUtil.swap(queue,j,k); xx%j.zDI]
k = j; c|@bwat4
} lv+TD!b
} hNmJ!Uo
*6DB0X_-}
} 8C9-_Ng`
DX K?Cv71z
} <;Zmjeb+#
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SortUtil： I75DUJqy]
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package org.rut.util.algorithm; -fHy-Oh
8&`LYdzt
import org.rut.util.algorithm.support.BubbleSort; u frL<]A
import org.rut.util.algorithm.support.HeapSort; pohp&Tcm
import org.rut.util.algorithm.support.ImprovedMergeSort; @8r pD"x
import org.rut.util.algorithm.support.ImprovedQuickSort; S2VA{9:m
import org.rut.util.algorithm.support.InsertSort; FZslv"F
import org.rut.util.algorithm.support.MergeSort; ;P%1j|7
import org.rut.util.algorithm.support.QuickSort; [;),\\u,d
import org.rut.util.algorithm.support.SelectionSort; ~<F8ug#
import org.rut.util.algorithm.support.ShellSort; 9H`XeQ.
sZ/v^xk
/** 0*D$R`$
* @author treeroot WuUk9_g
* @since 2006-2-2 \$T(t/$9
* @version 1.0 T&u5ki4NE
*/ z !rL s76
public class SortUtil { *kDCliL
public final static int INSERT = 1; DKJmTH]rUg
public final static int BUBBLE = 2; ieCEo|b
public final static int SELECTION = 3; )g#T9tx2D
public final static int SHELL = 4; 0Y{yKL
public final static int QUICK = 5; qwgPk9l
public final static int IMPROVED_QUICK = 6; CxOob1@
public final static int MERGE = 7; dufu|BL|}
public final static int IMPROVED_MERGE = 8; JL}_72gs
public final static int HEAP = 9; dV$gB<iS
EC!02S
public static void sort(int[] data) { 62o:,IcoG
sort(data, IMPROVED_QUICK); .Una+Z
} lbl?k5
private static String[] name={ a>I+]`g
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _ y8Wn}19f
}; o5uph=Q{
peuZ&yK+"
private static Sort[] impl=new Sort[]{ Ep3N&Imp
new InsertSort(), $OkBg0
new BubbleSort(), 9oR@UW1
new SelectionSort(), ;1O_M9
new ShellSort(), tKx~1-
new QuickSort(), gS]@I0y8 .
new ImprovedQuickSort(), ZWU)\}}_R
new MergeSort(), n QZwC
new ImprovedMergeSort(), ,I(d6
new HeapSort() /quc}"__
}; e+BQww
Z|j>gq
public static String toString(int algorithm){ [KaAXv .X
return name[algorithm-1]; ^-Kf']hU
} V0.vQ/
jaMjZp;{(
public static void sort(int[] data, int algorithm) { s;Z\Io
impl[algorithm-1].sort(data); dx{bB%?Y\=
} s6v;
sF?TmBQ*
public static interface Sort { udUyh%n
public void sort(int[] data); pVw}g@<M
} BmMGx8P
u9GQU
public static void swap(int[] data, int i, int j) { L<-_1!wh
int temp = data; FvXZ<(A{
data = data[j]; %wvdn
data[j] = temp; yyRiP|hJ
} Ln<`E|[29
} =eXU@B