[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; EW$drY@
} lBP?7`U
int i1=l; shw?_#?1dy
int i2=mid+1; ^!tX+`,6^
for(int cur=l;cur<=r;cur++){ T"\d,ug5[
if(i1==mid+1) L|[i<s;
data[cur]=temp[i2++]; 0+mR y57
else if(i2>r) EWJB/iED
data[cur]=temp[i1++]; *twGIX
else if(temp[i1] data[cur]=temp[i1++]; |QS|\8g{0V
else 1c,#`\Iikd
data[cur]=temp[i2++]; gwB,*.z
} bWL!=
} }P.s
?g1eW q&
} t__f=QB/
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改进后的归并排序: qiOtbH=
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package org.rut.util.algorithm.support; >V.?XZ nt
33%hZ`/>
import org.rut.util.algorithm.SortUtil; GUL~k@:_k
WD4"ft
/** ^Zl[#:EFP
* @author treeroot /CALXwL
* @since 2006-2-2 YusmMsN?
* @version 1.0 PE{<'K\g
*/ 1 F:bExQ
public class ImprovedMergeSort implements SortUtil.Sort { x|Uwk=;X|s
K^x{rn.Zf
private static final int THRESHOLD = 10; Bc!<!
cLyf[z)W
/* *6JA&zj0B
* (non-Javadoc) 3MX#}_7A
* 9#[,{2pJr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2-m@-
*/ rk=/iD
public void sort(int[] data) { !@!603Gy
int[] temp=new int[data.length]; h]@'M1D%
mergeSort(data,temp,0,data.length-1); q?frt3o
} 6O?zi|J[:
YUSrZ9Yg
private void mergeSort(int[] data, int[] temp, int l, int r) { Z7wl~Hk
int i, j, k; rFcz0
int mid = (l + r) / 2; _"*vj-{-y
if (l == r) 5[2kk5,
return; *~U*:>hS
if ((mid - l) >= THRESHOLD) y ;mk]
mergeSort(data, temp, l, mid); 5[g&0
else \<I&utn
insertSort(data, l, mid - l + 1); :V$\y up
if ((r - mid) > THRESHOLD) GX23c i
mergeSort(data, temp, mid + 1, r); i^WY/ OhL
else 'xd8rN%T
insertSort(data, mid + 1, r - mid); Xcfd]29
v$\<L|
for (i = l; i <= mid; i++) { m p_7$#{l
temp = data; a2?@OJ
} ['>ZC3?"h
for (j = 1; j <= r - mid; j++) { !,$K;L
temp[r - j + 1] = data[j + mid]; Bor_(eL^
} RaLV@>jPm
int a = temp[l]; Z<<=2Xl(
int b = temp[r]; uPho|hDp
for (i = l, j = r, k = l; k <= r; k++) { Y'1 KH}sH
if (a < b) { L5UZ@R,
data[k] = temp[i++]; ftmPdha%+
a = temp; bOU"s>?
} else { Sa)sDf1+`
data[k] = temp[j--]; _zbIS&4
b = temp[j]; ,J2qLH1
} NPv.7,
} w\[l4|g`
} ?9?A)?O<j~
P,zQl;
/** /7#MJH5b6
* @param data :}36;n<['
* @param l {1=|H$wKg
* @param i %4` U' j
*/ O\uIIuy
private void insertSort(int[] data, int start, int len) { {tYY _BI<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $S>bcsAy
} )cL(()N
} C@;e<
} qu#xc0?
} m*1
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堆排序： R68:=E4
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package org.rut.util.algorithm.support; s;Bh69
]'n4e*
import org.rut.util.algorithm.SortUtil; -vm1xp$
E"[p_ALdC
/** 4cy,'B
* @author treeroot {tOf0W|
* @since 2006-2-2 q%M~gp1
* @version 1.0 {o^tSEN!-
*/ H9'psv
public class HeapSort implements SortUtil.Sort{ #B <%
P3!@}!r8
/* (non-Javadoc) "N'W~XPG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D9;pjY
*/ vC1fKo\p
public void sort(int[] data) { L9^M?.a
MaxHeap h=new MaxHeap(); &2%|?f|
h.init(data); Mb"y{Fox
for(int i=0;i h.remove(); [QMN0#(h
System.arraycopy(h.queue,1,data,0,data.length); @x*xgf
} {m3#1iV9
J:'_S `J
private static class MaxHeap{ z80(+`
y5c\\e
void init(int[] data){ ,%A|:T]
this.queue=new int[data.length+1]; 7MZH'nO
for(int i=0;i queue[++size]=data; |_g7k2oLY
fixUp(size); T9J&^I
} E;`^`T40
} ]jI<Js*F
G2y1S/
private int size=0; +VQD'
:Hb`vH3x
private int[] queue; /? d)01
pdFO!A_t
public int get() { |Wa.W0A
return queue[1]; 'Qg!ww7O
} WqM| nX
i/C% 1<
public void remove() { cGm?F,/`
SortUtil.swap(queue,1,size--); [;yH.wn#5
fixDown(1); V=fh;p
} AB3OG*C9
file://fixdown 8kcMgCO
private void fixDown(int k) { yaG:}=.3
int j; ,?jc0L.'r]
while ((j = k << 1) <= size) { B1FJAKI);
if (j < size %26amp;%26amp; queue[j] j++; +-),E.
if (queue[k]>queue[j]) file://不用交换 Odw'Ua
break; Wj!+ E{y<r
SortUtil.swap(queue,j,k); *pD|N
k = j; $8(QBZq
} %2b^t*CQ
} )l! /7WKY
private void fixUp(int k) { u^MRKLn
while (k > 1) { 0#=xUk#LP`
int j = k >> 1; dg~lz80
if (queue[j]>queue[k]) WC=d@d)M
break; ex`T9j.=B
SortUtil.swap(queue,j,k); ~uq010lMno
k = j; `YwJ.E
} yEjiMtQll]
} \p.yR.
rZ n@i
} F_-xp1|
8oI|Z=
} /;}%E
DOGGQ$0
SortUtil： |qj"p
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package org.rut.util.algorithm; ig YYkt
SWhzcqp
import org.rut.util.algorithm.support.BubbleSort; -l_B;Sb:e
import org.rut.util.algorithm.support.HeapSort; PW5)") z
import org.rut.util.algorithm.support.ImprovedMergeSort; Iw.!*0$
import org.rut.util.algorithm.support.ImprovedQuickSort; |cnps$fk~
import org.rut.util.algorithm.support.InsertSort; 9.xRDk
import org.rut.util.algorithm.support.MergeSort; #C.
import org.rut.util.algorithm.support.QuickSort; #Ff8_xhP2
import org.rut.util.algorithm.support.SelectionSort; }wp/,\_ >
import org.rut.util.algorithm.support.ShellSort; xk/-TXB 0
;a>u7rw
/** W,H8B%e
* @author treeroot KIv_ AMr
* @since 2006-2-2 >`WfY(Lq
* @version 1.0 %x{kd8>u!
*/ / yBrlf
public class SortUtil { /W*Z.
public final static int INSERT = 1; ]&P\|b1*g
public final static int BUBBLE = 2; {K"hlu[
public final static int SELECTION = 3; H"UJBO>$
public final static int SHELL = 4; f@hM^%
public final static int QUICK = 5; c'3N;sZ*B
public final static int IMPROVED_QUICK = 6; ZB)R4
public final static int MERGE = 7; ?_bFe![q
public final static int IMPROVED_MERGE = 8; ;ltk}hJ]
public final static int HEAP = 9; 8kdJtEW3
vOz1& |;D
public static void sort(int[] data) { &wY$G! P
sort(data, IMPROVED_QUICK); w< Xwz`O
} JttDRNZAU
private static String[] name={ [PUu9rz#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lqMr@ :t
}; 9)W &yi
OqciZ@#5n
private static Sort[] impl=new Sort[]{ x>##qYT
new InsertSort(), _ {wP:dI "
new BubbleSort(), )kI**mI}
new SelectionSort(), 7p]Izx8][
new ShellSort(), U'9z.2"}9
new QuickSort(), ti%RE:*
new ImprovedQuickSort(), %aw.o*@:
new MergeSort(), gELG/6l
new ImprovedMergeSort(), `?N0?;
new HeapSort() N2'aC} I
}; 7mdd}L^h Z
$57b.+2n
public static String toString(int algorithm){ p$|7T31 *
return name[algorithm-1]; /u.ZvY3,
} 3BCD0 %8
#6ePwd
public static void sort(int[] data, int algorithm) { _ pz}
impl[algorithm-1].sort(data); DZC@^k \E
} ^s7!F.OC
m Rw0R{
public static interface Sort { ~I+MuI[
public void sort(int[] data); s^eiymP
} YcDKRyrt
ZGR5"el!
public static void swap(int[] data, int i, int j) { f4Y)GO<R]
int temp = data; HW~-GcU-o
data = data[j]; qT(6TP
data[j] = temp; "EMW'>&m
} Rb0I7~Z%'d
} 0]