[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; foeVjL:T
} 1 /`>Eh
int i1=l; Dcf`+?3
int i2=mid+1; [Zf<r1m
for(int cur=l;cur<=r;cur++){ cD\Qt9EI
if(i1==mid+1) V-31x)
data[cur]=temp[i2++]; BI s!
else if(i2>r) :Z)s'd.
data[cur]=temp[i1++]; T-\,r
else if(temp[i1] data[cur]=temp[i1++]; gM8eO-d
else c8u0\X,
data[cur]=temp[i2++]; `#V"@Go
} *VUXw@
} jL# akV
*=8)]_=f
} +2?[=g4;}
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改进后的归并排序: 7]Egu D4
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package org.rut.util.algorithm.support; {2nXItso
:A$6Y*s\
import org.rut.util.algorithm.SortUtil; ^$(|(N[;
]kPco4
/** Dj|S
* @author treeroot `C1LR,J
* @since 2006-2-2 (R,eWWF8~
* @version 1.0 L%DL n
*/ i0P+,U
public class ImprovedMergeSort implements SortUtil.Sort { "YBA$ef$
,ZSuo4
private static final int THRESHOLD = 10; r{btBv
V6L_aee}CK
/* s-*XAnot
* (non-Javadoc) >dM'UpN@
* +%yh@X6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ps]6,@uyB
*/ 3B0%:Jj
public void sort(int[] data) { 5IepVS(>?v
int[] temp=new int[data.length]; g^idS:GtX5
mergeSort(data,temp,0,data.length-1); ;9~z_orNQZ
} {`'b+0[;@
5q<kt{06\
private void mergeSort(int[] data, int[] temp, int l, int r) { Rm RV8 WJ6
int i, j, k; ;ry{cq
int mid = (l + r) / 2; ..!yf e"5
if (l == r) LV[4zo]=
return; #yqcUbJY0R
if ((mid - l) >= THRESHOLD) Vf@/}=X *
mergeSort(data, temp, l, mid); 2#R"#Q!
else FR <wp
insertSort(data, l, mid - l + 1); eZv0"FK X
if ((r - mid) > THRESHOLD) [ /D/
mergeSort(data, temp, mid + 1, r); OhTO*C8
else s[g1ei9
insertSort(data, mid + 1, r - mid); iPIA&)x}
wK3}K
for (i = l; i <= mid; i++) { V*?,r<(
temp = data; D;5RcZ
} s^U^n//
for (j = 1; j <= r - mid; j++) { F,D&
temp[r - j + 1] = data[j + mid]; V$@2:@8mo
} f9$98SI
int a = temp[l]; VS`S@+p
int b = temp[r]; dU\fC{1Z
for (i = l, j = r, k = l; k <= r; k++) { T|m+ULp~
if (a < b) { ~$@I <=L
data[k] = temp[i++]; #: F)A_Y
a = temp; 3lJK[V{'#'
} else { aV ^2
data[k] = temp[j--]; D,7! /u'
b = temp[j]; 6hZhD1lDG^
} V;z?m)ur
} Ze~\=X" "
} E )PEKWK\
^O?$}sr
/** 5t PmrWZ
* @param data $&4Zw6"=
* @param l U!Lws#\X
* @param i 0QPipuP
*/ ed{9UJWh
private void insertSort(int[] data, int start, int len) { XH. _Z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HqbTJ!a
} LP87X-qkjW
} Q.N^1?(>k
} WgIVhj
} V=c&QPP
f="}.
堆排序： ;9^B# aTM
Y}Ov`ZM!r
package org.rut.util.algorithm.support; &8(2U-
N5s_o0K4TU
import org.rut.util.algorithm.SortUtil; f ZISwr
_E~uuFMn*R
/** OS!47Z /q
* @author treeroot ]/a?:24[
* @since 2006-2-2 R38 w!6{
* @version 1.0 .1}u0IbJ
*/ \!%3giD5!
public class HeapSort implements SortUtil.Sort{ /eE P^)h
QCjmg5bf'7
/* (non-Javadoc) Ft]sTA+C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %jkd}D
*/ | zAey\
public void sort(int[] data) { cB<Zez
MaxHeap h=new MaxHeap(); gt ?&!S^
h.init(data); T.xW|Iwx
for(int i=0;i h.remove(); .OjJK?
System.arraycopy(h.queue,1,data,0,data.length); :S%|^QAN
} \&cVcAg
S`-z$ph}
private static class MaxHeap{ A(C3kISM
Cjd +\7#G
void init(int[] data){ S-1}3T%
this.queue=new int[data.length+1]; L4dbrPE*0
for(int i=0;i queue[++size]=data; 5/(Dh![l
fixUp(size); v\<`"
} ubgq8@;
} OZ-F+#d
hP|5q&wX
private int size=0; gC'GZi^
2n@"|\uHD
private int[] queue; o~~_>V)W
5?Bi+fg
public int get() { ZpwB"%e$
return queue[1]; G1D(-X4ALZ
} ?6[>HX;
s2tEyR+gW
public void remove() { 8g$ 8]'M^T
SortUtil.swap(queue,1,size--); ]s u\[?l
fixDown(1); ^awl-CG
} f5O*Njl
file://fixdown Z8:iaP)
private void fixDown(int k) { `=.{i}V
int j; `aC#s3[
while ((j = k << 1) <= size) { jW6@U%[!b
if (j < size %26amp;%26amp; queue[j] j++; wOOPuCw?
if (queue[k]>queue[j]) file://不用交换 kt@+UK."
break; h rZ\ O?j
SortUtil.swap(queue,j,k); :]]amziP&
k = j; $k!t&G
} Zw }7vD0
} 6h5*b8LxA
private void fixUp(int k) { *zmbo >{(
while (k > 1) { 2;q6~Y,
int j = k >> 1; D6 M:pIN*
if (queue[j]>queue[k]) l\S..B +
break; c~>M7e(
SortUtil.swap(queue,j,k); ^x4gUT-Wy
k = j; SmRU!C$A
} L5>>gG,
} 2\7]EW
Gjzhgz--
} j\W+wnAgk
{yJ{DU?%Y
} o`&idn|,
j6Vuj/+}
SortUtil： Sd{>(YWx~
ljNd!RaB
package org.rut.util.algorithm; al^ yCoB
04,]upC${W
import org.rut.util.algorithm.support.BubbleSort; R=E )j^<F
import org.rut.util.algorithm.support.HeapSort; 9'T(Fc
import org.rut.util.algorithm.support.ImprovedMergeSort; )2R:P`U
import org.rut.util.algorithm.support.ImprovedQuickSort; Kyv$yf9
import org.rut.util.algorithm.support.InsertSort; $H5Xa[
import org.rut.util.algorithm.support.MergeSort; HC$_p,9OV
import org.rut.util.algorithm.support.QuickSort; LNr2YRpyz
import org.rut.util.algorithm.support.SelectionSort; 8I@_X~R
import org.rut.util.algorithm.support.ShellSort; (+9@j(
D,J's(wd
/** ny#7iz/
* @author treeroot ;Yi ;2ttW
* @since 2006-2-2 8(ZQD+U(9F
* @version 1.0 bd%/dr
*/ z/;NoQ-
public class SortUtil { M T{^=F ]
public final static int INSERT = 1; ptUnV3h
public final static int BUBBLE = 2; W/+|dN{O+g
public final static int SELECTION = 3; ql],Wplg
public final static int SHELL = 4; !QYqRH~5
public final static int QUICK = 5; or(Z-8a_
public final static int IMPROVED_QUICK = 6; BB~Qs
public final static int MERGE = 7; Ha;^U/0|
public final static int IMPROVED_MERGE = 8; YRB,jwne
public final static int HEAP = 9; 9=hA#t.#
/*st,P$"
public static void sort(int[] data) { }bHdU]$}
sort(data, IMPROVED_QUICK); =_TCtH
} l'$AmuGj
private static String[] name={ ^gNAGQYA
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |JrG?:n
}; Z>o20uA
TlM ]d;9G
private static Sort[] impl=new Sort[]{ uYJ6"j
new InsertSort(), dGZVWEaPfx
new BubbleSort(), eoow]me
new SelectionSort(), i1
new ShellSort(), &L+u]&!6C
new QuickSort(), U|iSJ%K
new ImprovedQuickSort(), ]2tX'=X
new MergeSort(), .vwOp*3\
new ImprovedMergeSort(), ,u!c|4
new HeapSort() J#bEAK^L,l
}; i9+V<'h
YMJ?t"
public static String toString(int algorithm){ hYF<Wn3L
return name[algorithm-1]; xUj[d(q
} Rh~<#"G]
w!tQU9+*
public static void sort(int[] data, int algorithm) { 5q" ;R$+j
impl[algorithm-1].sort(data); 17J|g.]m-&
} o^gqpQv
aQkgkV;~
public static interface Sort { ~,dj)x 3M
public void sort(int[] data); HZ]'?&0
} LkNC8V
% &{>oEQ
public static void swap(int[] data, int i, int j) { trg+")a
int temp = data; m &s0Ub
data = data[j]; =XyK/$
data[j] = temp; fMd]P:B
} dxxD%lHCF
} G{YLyl/9