[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; +LF`ZXe8l
} ;]>a7o
int i1=l; AI]lG]q8
int i2=mid+1; a xz-H`oq4
for(int cur=l;cur<=r;cur++){ HL%|DCo
if(i1==mid+1) y.gjs<y
data[cur]=temp[i2++]; EN5F*s@r
else if(i2>r) aSIoq}c(
data[cur]=temp[i1++]; !M}ZK(
else if(temp[i1] data[cur]=temp[i1++]; ]v#T9QQN
else :"gu=u!
data[cur]=temp[i2++]; OlM3G^1e1
} WmuYHEU
} 0~BZh%s< (
]QJ7q}
} %*OQH?pyx}
@s0mX3P
改进后的归并排序: >dnDN3x
3x)jab
package org.rut.util.algorithm.support; A'n{K#
_|7bpt9
import org.rut.util.algorithm.SortUtil; \S>GtlQbn
p. KT=dZT
/** JZ/T:Hsh4
* @author treeroot B1TWOl?d{
* @since 2006-2-2 +|qw>1J(
* @version 1.0 L=&}s[5
*/ =m6<H
public class ImprovedMergeSort implements SortUtil.Sort { c]NZGn*
%v[KLMo'(
private static final int THRESHOLD = 10; @_ Tq>tOr&
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/* WQsu}_g5y
* (non-Javadoc) *RFBLCt
* xXCsJ9]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uG(XbDZZ1W
*/ P?+ VR=t
public void sort(int[] data) { .:=5|0m
int[] temp=new int[data.length]; ]>[0DX]j
mergeSort(data,temp,0,data.length-1); w{ Pl
} c|X}[
}brBhe8a
private void mergeSort(int[] data, int[] temp, int l, int r) { s?PB ]Tr
int i, j, k; 5Q,j+
int mid = (l + r) / 2; -fOBM 4
if (l == r) "p[3^<~uQ
return; zZP&`#TAy
if ((mid - l) >= THRESHOLD) cyB2=,
mergeSort(data, temp, l, mid); 7,Y+FZ
else .M0pb^M
insertSort(data, l, mid - l + 1); S2EV[K8#
if ((r - mid) > THRESHOLD) x[mh^V5ld
mergeSort(data, temp, mid + 1, r); .dj}y jd]f
else &;U F,
insertSort(data, mid + 1, r - mid); Zi<(>@z2
e^UUR-K%
for (i = l; i <= mid; i++) { @>+`1C
temp = data; AJ z 1
} b^"mQ
for (j = 1; j <= r - mid; j++) { X39%O'
temp[r - j + 1] = data[j + mid]; G6s3\de#U
} e^v\K[
int a = temp[l]; ]PB95%
int b = temp[r]; g`4WisL1n
for (i = l, j = r, k = l; k <= r; k++) { y0'WB`hNQ
if (a < b) { XpPcQIM*
data[k] = temp[i++]; -/_hO$|W
a = temp; [d=BN ,?
} else { ?O0,)hro
data[k] = temp[j--]; f;!L\$yKy
b = temp[j]; \/9O5`u*V
} K6,d{n
} AvB21~t&]
} % -.V6}V
Y6a9S`o
/** CKX3t:HP0
* @param data yF-`f _
* @param l Rp>%umDyL
* @param i TJ|do`fw>
*/ >RrG&Wv59
private void insertSort(int[] data, int start, int len) { xu>grj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); sTvw@o*
} Fe2t[y:8h
} Nj +^;Y
} %K0Wm#)
} DHuUEv<
l0E]#ra"
堆排序： fn8|@)J
.-1'#Z1T
package org.rut.util.algorithm.support; C1OiMb(:
E9]*!^=/
import org.rut.util.algorithm.SortUtil; [S0wwWU |0
eL [.;_
/** ~6{U^3
* @author treeroot g|j15&x
* @since 2006-2-2 +y\o^w4sT
* @version 1.0 -}RGz_LO/
*/ <(1[n pS&+
public class HeapSort implements SortUtil.Sort{ s<5PsR
l!:L<B
/* (non-Javadoc) >b8-v~o{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w17CZa 6
*/ NTVaz.
public void sort(int[] data) { DXZZZ[#
MaxHeap h=new MaxHeap(); B?4Iu)bCxI
h.init(data); -8v:eyc
for(int i=0;i h.remove(); onm"7JsO'
System.arraycopy(h.queue,1,data,0,data.length); +K,T^<F;
} H(Y1%@
a'O-0]g,
private static class MaxHeap{ *77Y$X##k
}|wC7*^)
void init(int[] data){ H#G3CD2&
this.queue=new int[data.length+1]; Uy@:-NC)kn
for(int i=0;i queue[++size]=data; 2s}G6'xE]P
fixUp(size); Uy?X-"UR
} w%(D4ldp
} &ViK9
)5u#'5I>
private int size=0; # hw;aQ
(Dn1Eov
private int[] queue; h<qi[d4X
kV4L4yE
public int get() { 5Ha(i [d
return queue[1]; V7D<'!
} *;Za))
uUe#+[bD
public void remove() { O\h%ZLjfO
SortUtil.swap(queue,1,size--); #"C!-kS'=
fixDown(1); M|R\[ Zf
} !Z0S@]C
file://fixdown 8t|?b
private void fixDown(int k) { !vuun |
int j; 6XnUs1O
while ((j = k << 1) <= size) { 'r1X6?dJ
if (j < size %26amp;%26amp; queue[j] j++; :_Iz( 2hV
if (queue[k]>queue[j]) file://不用交换 u/xP$
break; 2iC BF-,
SortUtil.swap(queue,j,k); T "#DhEM
k = j; ?QtM|e
} ]C{N4Ni^Z
} 5?|y%YH;R\
private void fixUp(int k) { %vUUx+
while (k > 1) { 8"rK
int j = k >> 1; -![{Zb@
if (queue[j]>queue[k]) IsjN xBM
break; rl-#Ez
SortUtil.swap(queue,j,k); cfy9wD
k = j; ]hRs -x
} iH>b"H>
} s~k62
UG]x CkDS
} uWi pjxS
99n;%W>
} M0hR]4T
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SortUtil： Z% ]LZ/O8
IDdu2HNu
package org.rut.util.algorithm; [Scao $
O%<+&Q7
import org.rut.util.algorithm.support.BubbleSort; ReGT*+UN
import org.rut.util.algorithm.support.HeapSort; ]deO\mB
import org.rut.util.algorithm.support.ImprovedMergeSort; OaY]}4tI$
import org.rut.util.algorithm.support.ImprovedQuickSort; HUbXJsSP
import org.rut.util.algorithm.support.InsertSort; M7#CMLy
import org.rut.util.algorithm.support.MergeSort; 6=x]20
import org.rut.util.algorithm.support.QuickSort; hMgk+4*
import org.rut.util.algorithm.support.SelectionSort; Fxn=+Xgg
import org.rut.util.algorithm.support.ShellSort; SQN{/")T
<~e*YrJ?-
/** 5f75r
* @author treeroot Hi U/fi`
* @since 2006-2-2 #v4^,$k>
* @version 1.0 fT<3~Z>m
*/ T0cm+|S
public class SortUtil { D\E"v,Y\+O
public final static int INSERT = 1; ~/Y8wxg
public final static int BUBBLE = 2; '1zC|:,
public final static int SELECTION = 3; }:*?w>=
public final static int SHELL = 4; N9vNSmm
public final static int QUICK = 5; wQM( |@zE}
public final static int IMPROVED_QUICK = 6; )ri'W <l
public final static int MERGE = 7; $?9u;+jIR
public final static int IMPROVED_MERGE = 8; K3&k+~$
public final static int HEAP = 9; j`_Z`eG
e.(RhajB
public static void sort(int[] data) { ~8'HX*B]z
sort(data, IMPROVED_QUICK); ncpA\E;ff^
} T,B%iZgCh
private static String[] name={ QRF:6bAxsL
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #nKGU"$+
}; 5U*${
S)"vyGv
private static Sort[] impl=new Sort[]{ i,L"%q)C
new InsertSort(), L l,nt
new BubbleSort(), CljEC1S#
new SelectionSort(), [TT:^F(Y
new ShellSort(), UM'JK#P"
new QuickSort(), .:(gg
new ImprovedQuickSort(), MW0CqMi]T
new MergeSort(), 7e{w,.ny!
new ImprovedMergeSort(), 2(GLc*B>
new HeapSort() u%Z4 8wr
}; aZmbt,.V
{q&A/
public static String toString(int algorithm){ p4K 8L'nZ
return name[algorithm-1]; MN>U jFA
} rWBgYh
3>^B%qg6
public static void sort(int[] data, int algorithm) { wD@ wOC
impl[algorithm-1].sort(data); $:?=A5ttuo
} %F<3_#Y
(e<p^TJ]
public static interface Sort { `2'*E\
public void sort(int[] data); f&XM|Bg
} 0b2;
#QW% ;^
public static void swap(int[] data, int i, int j) { v^ 1x}
int temp = data; {Hw$`wL
data = data[j]; 0JhUncx
data[j] = temp; /!y3ZzL
} Fd._D"
} ]`}EOS-Q