[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; d:&cq8^
} !?i9fYu
int i1=l; 2xuU[
int i2=mid+1; Y(rQ032s
for(int cur=l;cur<=r;cur++){ (0 t{
if(i1==mid+1) Dy. |bUB!f
data[cur]=temp[i2++]; E"BW-<_!
else if(i2>r) S?v;+3TG
data[cur]=temp[i1++]; \J(~ Nv5!
else if(temp[i1] data[cur]=temp[i1++]; nSo.,72
else `ZC -lAY
data[cur]=temp[i2++]; e jk?If 07
} :LX!T&
} o%]b\Vl6
j yp.2c
} DP*V|)
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改进后的归并排序: K~UT@,CS60
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package org.rut.util.algorithm.support; !JDyv\i}
I %1P:-
import org.rut.util.algorithm.SortUtil; CD?b.Cxai
6S%KUFB+e
/** :5^5l
* @author treeroot H9VdoxKo
* @since 2006-2-2 TffeCaBv
* @version 1.0 }/NL"0j+4
*/ :8)3t! A
public class ImprovedMergeSort implements SortUtil.Sort { u?g;fh6
+)( "!@
private static final int THRESHOLD = 10; Pa\yp?({q
G7-.d/8|^
/* W}(xE?9&
* (non-Javadoc) "wV7PSbM
* uZ1G,9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S|RUc}(
*/ Jn0L_@
public void sort(int[] data) { Tt0]G_
int[] temp=new int[data.length]; SV2\vby}C
mergeSort(data,temp,0,data.length-1); ~ebm,3?
} czo*_q%
V,tYqhQ3
private void mergeSort(int[] data, int[] temp, int l, int r) { :VRQd}$Pi
int i, j, k; Q;2kbVWY
int mid = (l + r) / 2; 4%jSqT@
if (l == r) v>Kv!OY:c
return; %.IW H9P7
if ((mid - l) >= THRESHOLD) |oOA;JC)(
mergeSort(data, temp, l, mid); pi*?fUg!W
else [DSzhi]
insertSort(data, l, mid - l + 1); F JxH{N6a
if ((r - mid) > THRESHOLD) .ddf'$6h
mergeSort(data, temp, mid + 1, r); z{> )'A/
else <e8Ux#x/
insertSort(data, mid + 1, r - mid); =p!Hl#
5&U?\YNLa
for (i = l; i <= mid; i++) { 8`w#)6(V
temp = data; l=&Va+K
} 1NlpOVq:)
for (j = 1; j <= r - mid; j++) { ^''3}<Ep
temp[r - j + 1] = data[j + mid]; 60p*4>^v
} zZCssn;[
int a = temp[l]; ?O e,
int b = temp[r]; t+WUz#i"
for (i = l, j = r, k = l; k <= r; k++) { 5@Xy) z
if (a < b) { [ 3SbWwg
data[k] = temp[i++]; ^MZ9Zu_
a = temp; YQfQ[{kp
} else { ( v=Z$#l
data[k] = temp[j--]; |Tl2r,(+R
b = temp[j]; 6x_D0j%^]
} !Ie={BpzbZ
} TbR Ee;1
} 1,G f;mcQ
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/** 6$$ku
* @param data :"oUnBY%
* @param l T 3+lYE
* @param i pXxpEv
*/ pB]+c%\
private void insertSort(int[] data, int start, int len) { Je~Ybh
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]M9r<x*
} ZEU/6.
} %?:eURQ
} =g^JJpS
} {B6tGLt#bf
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堆排序： Rwz (20n\^
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package org.rut.util.algorithm.support; 2Yd;#i)
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import org.rut.util.algorithm.SortUtil; O>L 5 dP
9"k^:}8.
/** =dI2j@}c
* @author treeroot 1|\/2
* @since 2006-2-2 M6b6lhg
* @version 1.0 )eSD5hOI)
*/ 7(= 09z
public class HeapSort implements SortUtil.Sort{ ?`D/#P
XFN4m #
/* (non-Javadoc) V\o&{7!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0j|JyS:}G
*/ @460r
public void sort(int[] data) { IOOAaa @(
MaxHeap h=new MaxHeap(); A4|a{\|$
h.init(data); HOAgRhzE
for(int i=0;i h.remove(); y]ZujfW7
System.arraycopy(h.queue,1,data,0,data.length); .EoLJHL }
} zz+[]G+"2m
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private static class MaxHeap{ 3DO ^vV
Bl)DuCV
void init(int[] data){ }xM >F%
this.queue=new int[data.length+1]; p8MPn>h<
for(int i=0;i queue[++size]=data; @5\ns-%
fixUp(size); |\~!oN
} U*6)/.J
} G+xdh
4!KUPgg
private int size=0; OmX(3>:9
eyGY8fF8$
private int[] queue; ]p2M!N,?
,] ,dOIOwn
public int get() { 9W<I~
return queue[1]; >w"k:O17
} CwVORf,uA
42: 6=\
public void remove() { ;4 ON
SortUtil.swap(queue,1,size--); gNG_,+=!
fixDown(1); =9JKg4I6
} 5 J9,/M0
file://fixdown )9QeVf
private void fixDown(int k) { k9<P]%
int j; ]2P*Z6Az
while ((j = k << 1) <= size) { L.@o
if (j < size %26amp;%26amp; queue[j] j++; ,2YkQ/>
if (queue[k]>queue[j]) file://不用交换 KDX34Fr1
break; \{ui{8+G
SortUtil.swap(queue,j,k); nZ 0rxx[V?
k = j; eD481r
} L(2KC>GvA
} %kJ_o*"
private void fixUp(int k) { JW4~Qwx
while (k > 1) { MdOQEWJ$|
int j = k >> 1; 5L}qL?S`x|
if (queue[j]>queue[k]) zLxO\R!d
break; "NamP\hj
SortUtil.swap(queue,j,k); hkq[xgX
k = j; ZsPT!l,
} t:G67^<3
} !5P\5WF~Y
_JjR= m
} 'bXm,Ed
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} m*MfGj(
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SortUtil： (hn@+hc
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package org.rut.util.algorithm; Iu`xe
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import org.rut.util.algorithm.support.BubbleSort; S6r$n
import org.rut.util.algorithm.support.HeapSort; =hO0@w
import org.rut.util.algorithm.support.ImprovedMergeSort; HNRZ59Yyq
import org.rut.util.algorithm.support.ImprovedQuickSort; X;I;CZ={
import org.rut.util.algorithm.support.InsertSort; sacaL4[_<
import org.rut.util.algorithm.support.MergeSort; n%>c4*t
import org.rut.util.algorithm.support.QuickSort; (gv1f
import org.rut.util.algorithm.support.SelectionSort; A@X&dy
import org.rut.util.algorithm.support.ShellSort; .*N,x0B(
E K)7g~
/** VE<&0d<
* @author treeroot m\88Etl@
* @since 2006-2-2 o#-K,|-
* @version 1.0 /^kZ}}9baU
*/ .'q0*Pe
public class SortUtil { 32r2<QrX
public final static int INSERT = 1; >t,BNsWB
public final static int BUBBLE = 2; EhkvC>y
public final static int SELECTION = 3; h$Z_r($b
public final static int SHELL = 4; PyD'lsV
public final static int QUICK = 5; vPn(~d_
public final static int IMPROVED_QUICK = 6; *.UM[Wo
public final static int MERGE = 7; ,&;#$ b5
public final static int IMPROVED_MERGE = 8; ?]'Rz\70
public final static int HEAP = 9; $\|$ekil4
p1 9j
public static void sort(int[] data) { &!uNN|W
sort(data, IMPROVED_QUICK); rTiW&#
} 4|Dxyb>pS
private static String[] name={ Z)6gh{B08
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" J1^6p*]GX
}; R)AFaP |
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private static Sort[] impl=new Sort[]{ cvR|qHNX
new InsertSort(), P| o_/BS
new BubbleSort(), Lzzf`jN]
new SelectionSort(), ;hz"`{(JY
new ShellSort(), <|_/i/H
new QuickSort(), L {6y]t7^
new ImprovedQuickSort(), z:hY{/-
new MergeSort(), \>8"r,hG|
new ImprovedMergeSort(), +1Ha,Ok
new HeapSort() li4rK<O
}; Ng?n}$g*
h\k!X/
public static String toString(int algorithm){ GoI3hp(
return name[algorithm-1]; `zNvZm-E
} `c^ _5:euX
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public static void sort(int[] data, int algorithm) { uP\?y(="
impl[algorithm-1].sort(data); }b-"[TDEF
} w`(EW>i
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public static interface Sort { 85rXm*Df
public void sort(int[] data); qNP&f8fH
} &D "$N"
@'.(62v
public static void swap(int[] data, int i, int j) { B{wx"mK
int temp = data; Iz/o|o]#
data = data[j]; 8}3dwr;-
data[j] = temp; c7mIwMhl~
} c}a.
} 3%?01$k