[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; _w/N[E
} `LU,uz
int i1=l; l<:E+lU
int i2=mid+1; !X <n:J
for(int cur=l;cur<=r;cur++){ kpw4Mq@
if(i1==mid+1) <T/L.>p4
data[cur]=temp[i2++]; Kcdd=2 [T
else if(i2>r) 0fK|}mmZA
data[cur]=temp[i1++]; I^Jp )k*z
else if(temp[i1] data[cur]=temp[i1++]; GXK?7S0H
else &&S4x
data[cur]=temp[i2++]; eRy'N|'
} YY<?w
} ^k<$N
RWQW/Gwx
} =<h=">}5'
Xgc\O08
改进后的归并排序: mT~>4xi0
*AQbXw]w
package org.rut.util.algorithm.support; P1>X5:
W}_}<rlF
import org.rut.util.algorithm.SortUtil; {-`OE
/)4r2x
/** )tch>.EQ_
* @author treeroot i4r~eneP
* @since 2006-2-2 ^JDV4>S\
* @version 1.0 SW'KYzn
*/ <d`UifqD
public class ImprovedMergeSort implements SortUtil.Sort { 6i9I 4*'
7Ej#7\TB]
private static final int THRESHOLD = 10; x2wWp-Z
'|?r&-5 h
/* =xet+;~ji
* (non-Javadoc) Zs|sPatV<
* ,VsCRp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w|o@r%Q#l
*/ QaBXzf
public void sort(int[] data) { XJ?z{gXJ
int[] temp=new int[data.length]; r8>?-P
mergeSort(data,temp,0,data.length-1); '="){
} @}!$NI8
.T-p]9*p
private void mergeSort(int[] data, int[] temp, int l, int r) { GnaVI
int i, j, k; cS7!,XC
int mid = (l + r) / 2; R_&z2I
if (l == r) "a{f? .X.
return; becQ5w/~
if ((mid - l) >= THRESHOLD) Cjk AQ(9
mergeSort(data, temp, l, mid); rO%+)M$A
else G_mu7w
insertSort(data, l, mid - l + 1); }PL
if ((r - mid) > THRESHOLD) Tic9ri
mergeSort(data, temp, mid + 1, r); 6&0a?Xu
else J vsB^F.4
insertSort(data, mid + 1, r - mid); !|c5@0Wr
2wsZ&y%
for (i = l; i <= mid; i++) { 6Ymk8.PF
temp = data; e'VXyf
} l'\b(3JF
for (j = 1; j <= r - mid; j++) { e"/X*xA
temp[r - j + 1] = data[j + mid]; rep"xV&|>o
} w!7/;VJ3d
int a = temp[l]; dS=,. }
int b = temp[r]; |c/rHEZ
for (i = l, j = r, k = l; k <= r; k++) { LXV6Ew5E
if (a < b) { =ApT#*D)o
data[k] = temp[i++]; *60)Vo.=
a = temp; y-#tU>P
} else { gNQJ:!
data[k] = temp[j--]; rP4@K%F9jB
b = temp[j]; 9ksrr{tW
} BZshTP[`
} 5xUPqW%3
} y<(.,Nb8
;f~'7RKy!G
/** +]vl8, 4@
* @param data iW~f
* @param l vy?YA-
* @param i e5KF~0`
*/ Sn&%epi
private void insertSort(int[] data, int start, int len) { ,_zt?o\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Mv=;+?z!
} \s'6)_
} ?0Zw ^a
} _0E,@[
} xII!2.
]XyJ7esg
堆排序： So`"z[5
{rLOAewr
package org.rut.util.algorithm.support; ;A!i V|
*2;3~8Y
import org.rut.util.algorithm.SortUtil; L 3@wdC~0
T]2q >N
/** heA\6W:u&
* @author treeroot jqedHnx
* @since 2006-2-2 a!]%@A6p
* @version 1.0 C\D4C]/8
*/ 0fU>L^P_?
public class HeapSort implements SortUtil.Sort{ blv6
a@J:*W
/* (non-Javadoc) B.#0kjA}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z5A<TC/:
*/ w2[R&hJ
public void sort(int[] data) { .`XA6e(8KR
MaxHeap h=new MaxHeap(); $@;[K\
h.init(data); IRa*}MJe
for(int i=0;i h.remove(); {*9i}w|2
System.arraycopy(h.queue,1,data,0,data.length); yr'`~[oSCy
} D(|$6J 0
5Ncd1
private static class MaxHeap{ iI0'z=J
\-yi#N
void init(int[] data){ "(qO}&b>
this.queue=new int[data.length+1]; 7F\g3^z9`
for(int i=0;i queue[++size]=data; lc7]=,qyF
fixUp(size); dM$S|,H
} dD%m=x
} 6}$cDk`dz
eSU8/9B
private int size=0; 'P#I<?vB
f?6=H^_>
private int[] queue; bX1ip2X lk
FC#Qtu~J
public int get() { }I]q$3.
return queue[1]; =fPO0Ot;
} DJ^JUVi
oP6G2@3P/
public void remove() { !k63`(Ti
SortUtil.swap(queue,1,size--); oL;/Qan
fixDown(1); psVRdluS
} cS"6%:hQ
file://fixdown ZHJzh\?
private void fixDown(int k) { , +^db)
int j; x!+a,+G
while ((j = k << 1) <= size) { -j,o:ng0
if (j < size %26amp;%26amp; queue[j] j++; }1wuH
if (queue[k]>queue[j]) file://不用交换 I_rVeMw=
break; Fz% n!d
SortUtil.swap(queue,j,k); _?"J.i
k = j; yrX]w3kr%
} Lsdu:+-
} SEmD's
private void fixUp(int k) { ;o\wSHc
while (k > 1) { bOdD:=f
int j = k >> 1; %O${EN
if (queue[j]>queue[k]) mVLGQlvVK
break; BJ5#!I%h
SortUtil.swap(queue,j,k); #z.x3D@^r6
k = j; ~cjvo?)&e;
} DI\sq8J^
} Fwr,e;Z
;Mz]uk
} 5tL6R3
X)~-MY*p
} iu'yB
JY,+eD
SortUtil： 4/4IZfznX
{`LV{!
package org.rut.util.algorithm; f8lww)^,v
e+mD$(h
import org.rut.util.algorithm.support.BubbleSort; 809-p_)B
import org.rut.util.algorithm.support.HeapSort; kAoai|m@R
import org.rut.util.algorithm.support.ImprovedMergeSort; !FO)||'[
import org.rut.util.algorithm.support.ImprovedQuickSort; sIpK@BQ'
import org.rut.util.algorithm.support.InsertSort; 3A5" %
import org.rut.util.algorithm.support.MergeSort; ;g9+*$Gw
import org.rut.util.algorithm.support.QuickSort; ;#due
import org.rut.util.algorithm.support.SelectionSort; bQ%^l#H_n'
import org.rut.util.algorithm.support.ShellSort; `W9_LROD
`6/7},"9t
/** ulQE{c[
* @author treeroot &V"&SV>}
* @since 2006-2-2 n!p&.Mt
* @version 1.0 ]:;gk&P
*/ ":Q^/;D}U
public class SortUtil { <bH>\@p7}
public final static int INSERT = 1; Z&%61jGK
public final static int BUBBLE = 2; waC%o%fD
public final static int SELECTION = 3; VYBl0!t
public final static int SHELL = 4; cmTZ))m
public final static int QUICK = 5; h4/rw fp^
public final static int IMPROVED_QUICK = 6; g5.Z B@j
public final static int MERGE = 7; ]WG\+1x9
public final static int IMPROVED_MERGE = 8; .jCdJ =z
public final static int HEAP = 9; 4ZIXG,@mZJ
&}]Wbk4:
public static void sort(int[] data) { )JPcSy*
sort(data, IMPROVED_QUICK); Wg[`H=)Q
} K"#}R<k8:A
private static String[] name={ wv<"W@& 9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" XxIUB(.QI
}; \h-[u%
~LVa#
private static Sort[] impl=new Sort[]{ E-x(5^b"
new InsertSort(), w3*JVIQC
new BubbleSort(), QMIXz[9w
new SelectionSort(), [#_ceg1G
new ShellSort(), (w.B_9#
new QuickSort(), (<ejJPWT
new ImprovedQuickSort(), &"BKue~q@p
new MergeSort(), ,FTF@h-Cs
new ImprovedMergeSort(), 8wBns)wy@
new HeapSort() |^1eL I
}; jkbz8.K
6jn<YR E-
public static String toString(int algorithm){ +RbCa c
return name[algorithm-1]; aU3&=aN+
} dCHU* 7DS
olqHa5qn
public static void sort(int[] data, int algorithm) { (HTVSC%=
impl[algorithm-1].sort(data); c[5>kQ-nq
} vF_?1|*|
+,smjg:O
public static interface Sort { ' o5,P/6
public void sort(int[] data); n8?gZ` W
} |peZ`O^~
GB-=DC6
public static void swap(int[] data, int i, int j) { lY~xoHT;[
int temp = data; ,Zdc
data = data[j]; t~Uqsa>n@'
data[j] = temp; Ei#"r\q j_
} 8Hhe&B
} e0D;]