[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; L@"1d.k_
} 0<8pG:BQ
int i1=l; ZZ<uiN$
int i2=mid+1; 5w\>Whbd
for(int cur=l;cur<=r;cur++){ ;<JyA3i^V,
if(i1==mid+1) [84f[`!Ui
data[cur]=temp[i2++]; 1@j0kTJ~m
else if(i2>r) cBl F
data[cur]=temp[i1++]; =,/08Cs
else if(temp[i1] data[cur]=temp[i1++]; D{]t50a.
else ~JJuM
data[cur]=temp[i2++]; GvL)SVv?
} E,F'k2yU
} q"|,HpQ
\a|FhhI
} P,2FH2Eyj
RJo"yB$1e6
改进后的归并排序: ~VRt6C
j{i3lGaN
package org.rut.util.algorithm.support; 1<y|,
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import org.rut.util.algorithm.SortUtil; 1e8J-Nkj
_Ra$"j
/** Vt {uG
* @author treeroot 'w?*4H
* @since 2006-2-2 _%M5 T
* @version 1.0 7fVlA"x
*/ hP=^JH
public class ImprovedMergeSort implements SortUtil.Sort { _&Hq`KJm
E^:8Jehq
private static final int THRESHOLD = 10; 7r`A6 \ !
K8sgeX|
/* na;U]IK
* (non-Javadoc) v&hQ;v
* Q-3o k7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h}X^
*/ ? 1OZEzA!
public void sort(int[] data) { {9tKq--@E9
int[] temp=new int[data.length]; 2;Ij~~
mergeSort(data,temp,0,data.length-1); 2VrO8q(
} 7q>Y)*V
"ooq1 0P
private void mergeSort(int[] data, int[] temp, int l, int r) { ionFPc].
int i, j, k; Sn I-dXNF
int mid = (l + r) / 2; i@=0fHiZQ
if (l == r) ?onaJ=mT
return; 8X6F6RK6,1
if ((mid - l) >= THRESHOLD) CCCd=s.
mergeSort(data, temp, l, mid); r#ISIgJXG
else Zc_%hQf2A
insertSort(data, l, mid - l + 1); i8F^ N=
if ((r - mid) > THRESHOLD) kZ&|.q1zki
mergeSort(data, temp, mid + 1, r); cmpT_51~O
else qq%\
insertSort(data, mid + 1, r - mid); \`H"4r[?(
)20jZm*
for (i = l; i <= mid; i++) { _Eus<c
temp = data; 82S?@%}#J
} e)pQh&uD
for (j = 1; j <= r - mid; j++) { y4%u</
temp[r - j + 1] = data[j + mid]; tE i-0J
} E?{{z4
int a = temp[l]; -^C't_Q o
int b = temp[r]; 6TN!63{Cz
for (i = l, j = r, k = l; k <= r; k++) { ^BDM'
if (a < b) { a J%&Y5L
data[k] = temp[i++]; %?GLMf7)
a = temp; RoV^sbWFt
} else { V/X4WZs|i
data[k] = temp[j--]; k<aKT?Ek>
b = temp[j]; ,/d R
} CdxEY
} 4eZ
} &d"c6il[
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/** So&an !
* @param data zh5$$*\
* @param l J^}w,r*=
* @param i |'w_5?|4
*/ K4]42#
private void insertSort(int[] data, int start, int len) { Rgb1B3gu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {`2R<O
} Y<~Nx~w{
} X6+2~'*t
} I%.96V
} ~hubh!d=
OQ[E-%v1 R
堆排序： t7A '
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package org.rut.util.algorithm.support; qTbY'V5A
1ga-8&!
import org.rut.util.algorithm.SortUtil; ]:lqbg[J
1`t4wD$/
/** mcbr3P
* @author treeroot ds@w=~
* @since 2006-2-2 ~VNN
* @version 1.0 64qm
*/ W/z\j/Rgc
public class HeapSort implements SortUtil.Sort{ ?\_N*NEtK
'ZyHp=RN)
/* (non-Javadoc) q4].C|7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RYU(z;+0p
*/ ,XD'f
public void sort(int[] data) { 0((3q'[ <
MaxHeap h=new MaxHeap(); U}H2!et&,)
h.init(data); mI55vNyer
for(int i=0;i h.remove(); ?{bF3Mz=
System.arraycopy(h.queue,1,data,0,data.length); ( K5w0
} I\NiA>c
v&BKl
private static class MaxHeap{ gv&%2e}_
nZ;h&N-_-
void init(int[] data){ pEUbP,3M:
this.queue=new int[data.length+1]; ]<9=%m
for(int i=0;i queue[++size]=data; VieX5
fixUp(size); O>zPWVwa
} I y?_2m
} y[U/5! `zV
h,|49~^@"
private int size=0; s%tPGjMq
8"!Z^_y)
private int[] queue; l2v4SvbX
mL\j^q,Y
public int get() { ;>*l?m-S@n
return queue[1]; OBGA~E;%
} 3t
j@4 yRl ^
public void remove() { ]Y#$!fIx
SortUtil.swap(queue,1,size--); Ri$wt.b
fixDown(1); Qo*,2B9R L
} BMw_F)hTO
file://fixdown sE*A,z?
private void fixDown(int k) { ENlqoj1
int j; PJC[#>}
while ((j = k << 1) <= size) { !Vtt.j &4
if (j < size %26amp;%26amp; queue[j] j++; "NUl7ce.R
if (queue[k]>queue[j]) file://不用交换 f/spJ<B).4
break; [Z2:3*5r.
SortUtil.swap(queue,j,k); `v*UY
k = j; .&:GOD
} GA19=gow
} bM]\mo>z<
private void fixUp(int k) { @(XX68
while (k > 1) { &Gp~)%
int j = k >> 1; x+j5vzhG)
if (queue[j]>queue[k]) W"9?D
break; ->DfT*)
SortUtil.swap(queue,j,k); IUX~dO
k = j; Vp =
} 1}#(4tw)
} >>lT-w
hg}Rh
} FhJ8}at+e
l26DPtWi
} jM%qv
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SortUtil： K`!q1g`
!^Mk5E(
package org.rut.util.algorithm; I!(.tu6u6c
#q{i<E 07
import org.rut.util.algorithm.support.BubbleSort; Dp:u!tdbeg
import org.rut.util.algorithm.support.HeapSort; auOYi<<>W
import org.rut.util.algorithm.support.ImprovedMergeSort; O.7Q*^_
import org.rut.util.algorithm.support.ImprovedQuickSort; 8'=8!V
import org.rut.util.algorithm.support.InsertSort; @Q:5{?
import org.rut.util.algorithm.support.MergeSort; NTRw:'
import org.rut.util.algorithm.support.QuickSort; N2yxli
import org.rut.util.algorithm.support.SelectionSort; =Qt08,.bW
import org.rut.util.algorithm.support.ShellSort; b .9]b
JTcK\t8
/** yVe<[!hJ
* @author treeroot ebk{p<
* @since 2006-2-2 ny:c&XS
* @version 1.0 xNG'UbU
*/ ".&x`C
public class SortUtil { vkE[Ur>
public final static int INSERT = 1; 3zJbb3e
public final static int BUBBLE = 2; ZN)a}\]
public final static int SELECTION = 3; _vA\j
public final static int SHELL = 4; '</
public final static int QUICK = 5; Jhbkp?Zli
public final static int IMPROVED_QUICK = 6; OtuOT=%
public final static int MERGE = 7; H-%)r&"vn
public final static int IMPROVED_MERGE = 8; MF>1u%
public final static int HEAP = 9; 27b7~!
S5:`fo^5
public static void sort(int[] data) { {e,m<mAi
sort(data, IMPROVED_QUICK); hw`+,_ g
} 6x\+j
private static String[] name={ jd;=5(2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F^kH"u[
}; 1gp3A
C3fSSa%b
private static Sort[] impl=new Sort[]{ ${n=1-SMU
new InsertSort(), xZ2}1D
new BubbleSort(), [3`T/Wm
new SelectionSort(), {Y{*(5YV
new ShellSort(), Ya] qo]
new QuickSort(), b&uo^G,
new ImprovedQuickSort(), <Sn5ME<*
new MergeSort(), azMrY<
new ImprovedMergeSort(), }G$rr.G
new HeapSort() zGFo-C
}; }a@ZFk_>
[V`j@dV
public static String toString(int algorithm){ qX{m7
return name[algorithm-1]; ehEXC
} OuIoO
6,'v /A-
public static void sort(int[] data, int algorithm) { ehO@3%z30c
impl[algorithm-1].sort(data); O~F/pJN`
} xw-x<7
'tK5s>gv<
public static interface Sort { se](hu~w
public void sort(int[] data); 4VE7%.z+
} pfW0)V1t
1 O+4A[cr
public static void swap(int[] data, int i, int j) { o"@y=n/
int temp = data; d)|{iUcW
data = data[j]; IC}?oXs5G
data[j] = temp; c }>:>^
} N7j
} VHX&#vm*