[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; :`BZ,j_
} #fgRF
int i1=l; @kU{
int i2=mid+1; !>XG$-$`Z
for(int cur=l;cur<=r;cur++){ B ;Zsp
if(i1==mid+1) 6itp Mck
data[cur]=temp[i2++]; Bkg/A;H
else if(i2>r) U" eP>HHp
data[cur]=temp[i1++]; Id8^6FLw
else if(temp[i1] data[cur]=temp[i1++]; $Yfm>4
else EoLF7j<W
data[cur]=temp[i2++]; lhZWL}l
} 1B~H*=t4h
} F 7+Gt Ed
|a@$KF$
} (Bs0/C
W]|;ZzZ=m
改进后的归并排序: e6s-;
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package org.rut.util.algorithm.support; F5Ce:+h
=\s(v-8
import org.rut.util.algorithm.SortUtil; zjd]65P
+gb2>fei&
/** l'YpSO~l7
* @author treeroot 9k.LV/Y
* @since 2006-2-2 @+A`n21,O
* @version 1.0 V^Wo%e7#u[
*/ yO Cv-zm
public class ImprovedMergeSort implements SortUtil.Sort { `X?l`H;#
%XGwQB$zk8
private static final int THRESHOLD = 10; EgIFi{q=0
xQs2)
/* .v[8ie
* (non-Javadoc) Te?UQX7Z}M
* @DK,ka(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [.tqgU
*/ @ ?y(\>
public void sort(int[] data) { 6L@g]f|Y@
int[] temp=new int[data.length]; =!3G,qV
mergeSort(data,temp,0,data.length-1); GCul6,w
} {UT>> *C
<rc3&qmd
private void mergeSort(int[] data, int[] temp, int l, int r) { 061@N=p8
int i, j, k; <~# ZtD$G
int mid = (l + r) / 2; TL@_m^SM
if (l == r) D6Ov]E:fa
return; mj :8ZZ
if ((mid - l) >= THRESHOLD) b\~rL,7(
mergeSort(data, temp, l, mid); cw#p!mOi~
else 7V?]Qif~
insertSort(data, l, mid - l + 1); H~RWM'_
if ((r - mid) > THRESHOLD) 2&fIF}vk>m
mergeSort(data, temp, mid + 1, r); vW6Pf^yJ
else Vf6lu)Zc1
insertSort(data, mid + 1, r - mid); mJb>)bOl
Er} xB~<t
for (i = l; i <= mid; i++) { '3=[xVnv
temp = data; Uxx=$&#
} OIB~W
for (j = 1; j <= r - mid; j++) { u{=(]n
temp[r - j + 1] = data[j + mid]; 0hcrQ^BB!b
} hBDPz1<
int a = temp[l]; /yn1MW[.
int b = temp[r]; y6Xfddd61
for (i = l, j = r, k = l; k <= r; k++) { M9*7r\hqYV
if (a < b) { 8^ju=
data[k] = temp[i++]; w#k'RuOw5
a = temp; R(@7$
} else { g<oSTAw
data[k] = temp[j--]; y]eH@:MJ;A
b = temp[j]; hfP}+on%
} # 4`*`)%
} V_Kpb*3
} a #?%I#
]qL#/
/** ?m#X";^V
* @param data 0rY<CV;fZ
* @param l 9ZUG~d7_
* @param i JE,R[` &
*/ E,E:WuB
private void insertSort(int[] data, int start, int len) { : :8UVLX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Hx2.2A^
} C/%umazP9
} P:t|'t
} _={*<E
} ^dH#n~Wx0
a_'W1ek-@
堆排序： q5:-?|jXJ
],R rk]1
package org.rut.util.algorithm.support; a^i`DrX
yyxGVfr
import org.rut.util.algorithm.SortUtil; vV.'&."g
punc'~
/** F7UY>z3jL
* @author treeroot 'R8VCj
* @since 2006-2-2 .z7XYmv
* @version 1.0 XLp tJ4~v
*/ f]q3E[?/
public class HeapSort implements SortUtil.Sort{ gE(QVbh(
{4ON2{8;4
/* (non-Javadoc) C,z7f"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EaFd1
*/ }Y[Z`w
public void sort(int[] data) { '(Uyju=
MaxHeap h=new MaxHeap(); c`mJrS:
h.init(data); b_cnVlN[
for(int i=0;i h.remove(); J7t5B}}
System.arraycopy(h.queue,1,data,0,data.length); #*#4vMk<
} +[`N|x<
)mxY]W+
private static class MaxHeap{ neJNMdv@T
}qT @.
void init(int[] data){ Hkg^
this.queue=new int[data.length+1]; 6G7B&"&
for(int i=0;i queue[++size]=data; z,}1K!
fixUp(size); c>{X(Z=2
} ]ms#*IZ
} )<9g+^
~-lIOQ.v
private int size=0; IB /.i(
QkZT%!7
private int[] queue; o1MI&}r
S20x
public int get() { $1.iMHb
return queue[1]; g$kK)z
} ~el#pf~
wKe^5|Rr
public void remove() { j[m\;3Sp
SortUtil.swap(queue,1,size--); F}<&@7kF
fixDown(1); D}px=?
} }\=9l<|
file://fixdown !V$nU8p|
private void fixDown(int k) { s ,\w00-:
int j; [nn/a?Z4S
while ((j = k << 1) <= size) { ?c"No|@+
if (j < size %26amp;%26amp; queue[j] j++; a-x8LfcbF
if (queue[k]>queue[j]) file://不用交换 l!Z>QE`.S
break; jpZX5_o
SortUtil.swap(queue,j,k); gl:vJD
k = j; T,Cq;|g5E
} =t<!W
} HI#}M|4n
private void fixUp(int k) { 6g29!F`y
while (k > 1) { Usk@{
int j = k >> 1; mLPQ5`_
if (queue[j]>queue[k]) qD7(+a
break; (' /S~
SortUtil.swap(queue,j,k); djqSW9
k = j; ii2X7Q
} a2vUZhkR
} jWiZ!dtUZ
,;;M69c[ x
} 7 ;|jq39
6#7f^uIK
} 1Ls@|
ly%$>BRU
SortUtil： .hn{m9|U
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package org.rut.util.algorithm; . Uv7{(
ss T o?WL|
import org.rut.util.algorithm.support.BubbleSort; EyI 9$@4
import org.rut.util.algorithm.support.HeapSort; Y<:%_]]
import org.rut.util.algorithm.support.ImprovedMergeSort; ktU98Bk]
import org.rut.util.algorithm.support.ImprovedQuickSort; Sq/M %z5'
import org.rut.util.algorithm.support.InsertSort; ml.l( 6A
import org.rut.util.algorithm.support.MergeSort; iBwl(,)?m2
import org.rut.util.algorithm.support.QuickSort; l6Ze6X I
import org.rut.util.algorithm.support.SelectionSort; ?JzLn,&
import org.rut.util.algorithm.support.ShellSort; g?A4C`l6iy
J*U,kyYF
/** {3yzC
* @author treeroot pwT|T;j*
* @since 2006-2-2 >wej1#\3
* @version 1.0 kGc;j8>."
*/ K_Y0;!W
public class SortUtil { H&[CSc
public final static int INSERT = 1; A;1<P5lo
public final static int BUBBLE = 2; gEIjG
public final static int SELECTION = 3; Cq !VMl>hP
public final static int SHELL = 4; 8II-'%S6q
public final static int QUICK = 5; K7M7T5<
public final static int IMPROVED_QUICK = 6; ScQJsFE6
public final static int MERGE = 7; z(g4D!
public final static int IMPROVED_MERGE = 8; j^llO1i/
public final static int HEAP = 9; 3T# zxu
Ayc}uuu
public static void sort(int[] data) { }/x `w
sort(data, IMPROVED_QUICK); 9Vxsv*OR,
} $.R$I&U
private static String[] name={ r&A#h;EQX2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3lMmSKN
}; KqcelI?-I
!\JG]2 \
private static Sort[] impl=new Sort[]{ OQ 5{#
new InsertSort(), 1{_tV^3@
new BubbleSort(), fxI>FhU_
new SelectionSort(), ]]d9\fw
new ShellSort(), D}HW7Hnu^
new QuickSort(), d~g
new ImprovedQuickSort(), ~d/Doi
new MergeSort(), v#IW;Rj8
new ImprovedMergeSort(), %g5weiFM
new HeapSort() E+dr\Xhv
}; DvF`KHsy
.r[DqC
public static String toString(int algorithm){ szF[LRb
return name[algorithm-1]; t&mw@bj
} Z7JI4"
+NxEx/{
public static void sort(int[] data, int algorithm) { ?%{bMqYJD{
impl[algorithm-1].sort(data); igOjlg_Q
} zbddn4bW9
$d:/cN 8E
public static interface Sort { &e7yX
public void sort(int[] data); <6mXlK3N0
} :)g=AhBF
`R!0uRu
public static void swap(int[] data, int i, int j) { |08tQ
int temp = data; QVL92"
data = data[j]; :o*{.
data[j] = temp; Fb*^GH)J
} UB|Nx(V s
} y,DK@X