[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; ^]Y>[[
} 20h} [Q(
int i1=l; 4&lv6`G `
int i2=mid+1; D(op)]8
for(int cur=l;cur<=r;cur++){ W\$`w
if(i1==mid+1) H064BM
data[cur]=temp[i2++]; /|m2WxK)
else if(i2>r) <Xhm`rH
data[cur]=temp[i1++]; VOsRAn/N
else if(temp[i1] data[cur]=temp[i1++]; IxN9&xa
else XAKs0*J>
data[cur]=temp[i2++]; h]&GLb&<?
} ;vR4XHl|
} 5J.bD)yrP
#6aW9GO
} #<"~~2?
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改进后的归并排序: +zN-!5x
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package org.rut.util.algorithm.support; dh\'<|\K
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import org.rut.util.algorithm.SortUtil; .[KrlfI
oAVnK[EMq`
/** wc@X.Q[
* @author treeroot e`_LEv
* @since 2006-2-2 &ee~p&S,>
* @version 1.0 hp50J
*/ e(;,`L\*
public class ImprovedMergeSort implements SortUtil.Sort { z]y.W`i
~8Fk(E_
private static final int THRESHOLD = 10; ,5p(T_V/
|Pax=oJ\M
/* %)8}X>xq
* (non-Javadoc) =_*Zn(>t`
* '?' l;#^i<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wh`"w7br
*/ nsC3
public void sort(int[] data) { Xf]d. :
int[] temp=new int[data.length]; @tnz]^V
mergeSort(data,temp,0,data.length-1); K:[F%e
} epe)a
;%9|kU
private void mergeSort(int[] data, int[] temp, int l, int r) { 9!\B6=r y4
int i, j, k; !X#OOqPr=
int mid = (l + r) / 2; OX7M8cmc+
if (l == r) Yx%Hs5}8
return; a$OE0zn`
if ((mid - l) >= THRESHOLD) X=&ET)8-Y
mergeSort(data, temp, l, mid); [=q1T3
else {*" |#6-
insertSort(data, l, mid - l + 1); 1W LXM^4
if ((r - mid) > THRESHOLD) !sP{gi#=
mergeSort(data, temp, mid + 1, r); wH&!W~M
else *I.f1lz%*
insertSort(data, mid + 1, r - mid); k@J&IJ
>z>!Luw
for (i = l; i <= mid; i++) { '3fu
temp = data; H[$"+&q
} xwq (N_
for (j = 1; j <= r - mid; j++) { bl;1i@Z*M
temp[r - j + 1] = data[j + mid]; C`9+6T
} '@KEi%-^>
int a = temp[l]; 83\pZ1>)_
int b = temp[r]; } 9Eg=%0v
for (i = l, j = r, k = l; k <= r; k++) { u'DRN,h+
if (a < b) { E7UU
data[k] = temp[i++]; sf87$S0
a = temp; YnAm{YyI
} else { lvz7#f L~
data[k] = temp[j--]; azp):*f("
b = temp[j]; P l]O\vh
} 5c0 ZRV#
} \ :sUL!
} @o _}g !9=
mR:uj2*
/** HyZqUbHa
* @param data ZhaP2pC%4
* @param l v>)"HL"XG
* @param i *)T^ChD,
*/ ~Ea} /Au
private void insertSort(int[] data, int start, int len) { "ne?P9'hF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (Zrj_P`0[
} 0&|\N ? 8_
} E,U+o $
} & G4\2l9
} mSF(q78?
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堆排序： d#4**BM
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package org.rut.util.algorithm.support; IY\5@PVZ
b9HtR-iR;
import org.rut.util.algorithm.SortUtil; 6j]0R*B7`Q
x*U)Y
/** />pI8 g<
* @author treeroot _op}1
* @since 2006-2-2 <)c)%'v
* @version 1.0 9IfmW^0
*/ ~KX/ Ai
public class HeapSort implements SortUtil.Sort{ q ^N7I@Y
&.Qrs:U
/* (non-Javadoc) {@{']Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vaw+.sG`AP
*/ XJ| <?
public void sort(int[] data) { 7WS p($
MaxHeap h=new MaxHeap(); %RRNJf}z
h.init(data); G@X% +$I
for(int i=0;i h.remove(); 051E6-
System.arraycopy(h.queue,1,data,0,data.length); "_NN3lD)X
} _9Te!gJ4_#
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private static class MaxHeap{ Hd ={CFip
A[{yCn`tM
void init(int[] data){ CxW>~O:
this.queue=new int[data.length+1]; ^%{7}g&$u
for(int i=0;i queue[++size]=data; 8^1 Te m
fixUp(size); D.u{~
} mL{6L?
} vw/J8'
uh>; 8
private int size=0; q{LF>Wi
G}raA%
private int[] queue; }V`"s^
sBg.u
public int get() { KU(&%|;g
return queue[1]; S g![Lsj
} :J&oX <nF^
z,p~z*4
public void remove() { 0pd'93C
SortUtil.swap(queue,1,size--); 3~{:`[0Q
fixDown(1); p6Gy,C.
} []1C$.5DD
file://fixdown *P=VFP
private void fixDown(int k) { E4/Dr}4
int j; 2eY_%Y0
while ((j = k << 1) <= size) { wJo}!{bN
if (j < size %26amp;%26amp; queue[j] j++; w;amZgD>
if (queue[k]>queue[j]) file://不用交换 ~HsJUro
break; N5 6g+,w%)
SortUtil.swap(queue,j,k); Z=o2H Bm7
k = j; 3bH'H*2
} }9OC,Y8?D
} j6 z^Tt12
private void fixUp(int k) { &@OT*pNna
while (k > 1) { x g
int j = k >> 1; vXZOy%$o
if (queue[j]>queue[k]) dkTX
break; >}i E(
SortUtil.swap(queue,j,k); e6$WQd`O
k = j; fr6fj
} ;[OH(!
} '7@zGk##(
Lnl=.z`jK
} T:yE(OBf
Eo]xNn/g
} v PG},m~-
hhc,uJ">!
SortUtil： R-d:j^:f
7ZWgf"1j
package org.rut.util.algorithm; y766; X:J
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import org.rut.util.algorithm.support.BubbleSort; v`Oc,
import org.rut.util.algorithm.support.HeapSort; c,+:i1IAy
import org.rut.util.algorithm.support.ImprovedMergeSort; z<XtS[ki
import org.rut.util.algorithm.support.ImprovedQuickSort; ,w4V?>l
import org.rut.util.algorithm.support.InsertSort; aj{Y\ 3L
import org.rut.util.algorithm.support.MergeSort; m~0/&RA
import org.rut.util.algorithm.support.QuickSort; $B5aje}i
import org.rut.util.algorithm.support.SelectionSort; tFOhL9T
import org.rut.util.algorithm.support.ShellSort; w+u3*/Zf
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/** 9EibIOD^/
* @author treeroot I:1C8*/
* @since 2006-2-2 U8n V[
* @version 1.0 M-Y_ Wb3
*/ !wh8'X*
public class SortUtil { =MDysb&:
public final static int INSERT = 1; ],Do6 @M-
public final static int BUBBLE = 2; ope^~+c~\
public final static int SELECTION = 3; ~dTrf>R8M
public final static int SHELL = 4; z_4J)?3
public final static int QUICK = 5; e8?jmN`2
public final static int IMPROVED_QUICK = 6; YO}<Ytx
public final static int MERGE = 7; M&9+6e'-F
public final static int IMPROVED_MERGE = 8; 60?%<oJ oH
public final static int HEAP = 9; tW}'g:s
\xw5JGm
public static void sort(int[] data) { q(W3i^778
sort(data, IMPROVED_QUICK); FP4P|kl/9'
} 5D//*}b,
private static String[] name={ 7Kxp=-k
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lZKi'vg7
}; Q K<"2p?
a~y'RyA
private static Sort[] impl=new Sort[]{ "b3"TPfK
new InsertSort(), ":QZy8f9%
new BubbleSort(), aHK}sr,U
new SelectionSort(), CryBwm
new ShellSort(), |[b{)s?x
new QuickSort(), t!7-DF|N
new ImprovedQuickSort(), ZyFjFHe+
new MergeSort(), ?)d~cJ
new ImprovedMergeSort(), e^1Twz3z
new HeapSort() gT6jYQ
}; D_zZXbNc
suDQ~\n
public static String toString(int algorithm){ R.yvjPwJ
return name[algorithm-1]; V+9 MoT?8
} CB}2j
SSMHoJGm
public static void sort(int[] data, int algorithm) { J)p l|I
impl[algorithm-1].sort(data); q9s=~d7
} r$s Qf&=
;vjOUn[E
public static interface Sort { V1B5w_^>h'
public void sort(int[] data); p9{mS7R9T
} )MTOU47U
#Ki[$bS~6
public static void swap(int[] data, int i, int j) { &\*(Q*2N
int temp = data; d5:c^`
data = data[j]; j*r{2f4Rt
data[j] = temp; m^;f(IK5
} nUOz\y
} xMG~N`r