[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; |ouk;r24V
} Uw!v=n3#!
int i1=l; WfVie6
int i2=mid+1; Z^3Risi
for(int cur=l;cur<=r;cur++){ [z9i v~
if(i1==mid+1) ?CC6/bE-{
data[cur]=temp[i2++]; U;/ )V
else if(i2>r) @AFLFX]
data[cur]=temp[i1++]; J^T66}r[f,
else if(temp[i1] data[cur]=temp[i1++]; ub&1L_K
else @2<J_Ja
data[cur]=temp[i2++]; ~Q0}>m,S
} Yv)/DsSyL
} Et(prmH
P:+:Cm<
} X"]ZV]7(]s
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改进后的归并排序: ,&$Y2+
*SZ<ori
package org.rut.util.algorithm.support; ORO~(%-(e
Yp8$0KK
import org.rut.util.algorithm.SortUtil; (~~=<0S
//(c 1/s
/** .6*A~%-=[d
* @author treeroot BeRn9[
* @since 2006-2-2 )Z#7%,o
* @version 1.0 ,3K?=e2
*/ AWzpk}\
public class ImprovedMergeSort implements SortUtil.Sort { :c>,=FUT
M:~#"lfK
private static final int THRESHOLD = 10; K(?7E6\vO
20qT1!ju
/* PSE![whK
* (non-Javadoc) 7?4>'
* nz(OHh!}u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `'/8ifKz
*/ Z-p_hNb
public void sort(int[] data) { \Z$*8z=
int[] temp=new int[data.length]; Z7Kc`9.0|
mergeSort(data,temp,0,data.length-1); 5R4 dN=L*1
} 9M6&+1XE
g!8-yri
private void mergeSort(int[] data, int[] temp, int l, int r) { 9}=Fdt
int i, j, k; {_Y\Y&#
int mid = (l + r) / 2; :2?du
if (l == r) c~V\,lcI
return; ??F{Gli"C`
if ((mid - l) >= THRESHOLD) #KIHq2:.4
mergeSort(data, temp, l, mid); `c icjA@~
else b#b#r
insertSort(data, l, mid - l + 1); b% F|VG
if ((r - mid) > THRESHOLD) !@Ox%vK
mergeSort(data, temp, mid + 1, r); ojaZC,}
else B\Uj
insertSort(data, mid + 1, r - mid); gP}M\3-O
@M1U)JoQ
for (i = l; i <= mid; i++) { f-Sb:O!V
temp = data; 5b&'gd^d
} 30<^0J.1
for (j = 1; j <= r - mid; j++) { \Tc$P#
temp[r - j + 1] = data[j + mid]; S&a44i
} g {00i
int a = temp[l]; ;y"DEFs,u
int b = temp[r]; M*x_1h5n
for (i = l, j = r, k = l; k <= r; k++) { 'F@'4[uda
if (a < b) { Mqq7;w@(J
data[k] = temp[i++]; OlP#|x*
a = temp; }} IvZG&
} else { Nz m 7E]
data[k] = temp[j--]; %bAv.'C
b = temp[j]; \t}!Dr+yN
} bNXT*HOZb3
} `18G 5R
} /h_BF\VBs
n@*NQ`(_
/** [P^ .=F
* @param data aJub("
* @param l xHf l>C'
* @param i BUtXHD
*/ {9z EnVfg
private void insertSort(int[] data, int start, int len) { 4u<oe_n
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E]68IuP@'
} s>kzt1,x
} v8LKv`I's
} )0NA*<Q+.
} +;vfn>^!b
/V,:gLpQ
堆排序： 8 }-"&-X
WKN\*N<
package org.rut.util.algorithm.support; spJB6n(
;lP)
import org.rut.util.algorithm.SortUtil; 1:8ZS
"]sr4Jg=
/** zgLm~
* @author treeroot P5[.2y_qM
* @since 2006-2-2 :Bl $c,J
* @version 1.0 xC|7"N^/
*/ *r%=p/oQ}B
public class HeapSort implements SortUtil.Sort{ |W?x6]~.R
I&4|T<j
/* (non-Javadoc) mp}ZHufG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "BK&C6]
*/ t/HE@xPxI5
public void sort(int[] data) { [~x Ql
MaxHeap h=new MaxHeap(); Oq[tgmf
h.init(data); CYz]tv}g:
for(int i=0;i h.remove(); 4/$]wK`
System.arraycopy(h.queue,1,data,0,data.length); 9=:!XkT.
} v-OaH81&R
`a] /e
private static class MaxHeap{ Zd042 %
MwiT1sB~
void init(int[] data){ #*5A]"k
this.queue=new int[data.length+1]; _Nw-|N.
for(int i=0;i queue[++size]=data; 2nk}'HBe
fixUp(size); pm^[ve
} NKO5c?ds
} k5|h8%h8
h"j{B
private int size=0; 1SQ&mH/
U)N;=gr\
private int[] queue; rNdap*.
QH;1*
public int get() { o: qB#8X
return queue[1]; \T>f+0=4
} :h"Y>1P
`*N2x\+X
public void remove() { B|#"dhT
SortUtil.swap(queue,1,size--); ;l"z4>kt7
fixDown(1); 7u0!Q\
} evq*&.6\
file://fixdown j`(o\Fd )
private void fixDown(int k) { Nn+leM
int j; {R\"x|
while ((j = k << 1) <= size) { aabnlOVw
if (j < size %26amp;%26amp; queue[j] j++; bq]af.o*
if (queue[k]>queue[j]) file://不用交换 R:-^,/1
break; 0Bb amU
SortUtil.swap(queue,j,k); jrG@ +" }
k = j; 't2"CPZ
} /&a[D2
} m%ak]rv([
private void fixUp(int k) { ]QRhTz
while (k > 1) { qpFFvZ W
int j = k >> 1; >tYptRP
if (queue[j]>queue[k]) A6= Um%T
break; q8`JRmt)H
SortUtil.swap(queue,j,k); PO1sVP.S
k = j; 8nW#Q<s
} 1Sr@$+VGO
} LsoP >vJG
^I@43Jy/
} [{L4~(uU8
%3|0_
} (Jy7
/(5SJ(a
SortUtil： ?tSFM:9PU
Kb#py6
package org.rut.util.algorithm; *ix&"|h
@ITJ}e4
import org.rut.util.algorithm.support.BubbleSort; S!0<aFh
import org.rut.util.algorithm.support.HeapSort; ==~X8k|{E
import org.rut.util.algorithm.support.ImprovedMergeSort; 9H`Q |7g(5
import org.rut.util.algorithm.support.ImprovedQuickSort; gM '_1zs U
import org.rut.util.algorithm.support.InsertSort; }]'Z~5T
import org.rut.util.algorithm.support.MergeSort; Quqts(Q)+
import org.rut.util.algorithm.support.QuickSort; C5$1K'X@
import org.rut.util.algorithm.support.SelectionSort; i.C+{QH
import org.rut.util.algorithm.support.ShellSort; ULNU'6
^/U-(4O05*
/** UzWf_r
* @author treeroot Tm 6<^5t
* @since 2006-2-2 S)T~vK(n
* @version 1.0 )\8l6Gw
*/ /z.Y<xOc
public class SortUtil { bODCC5yL
public final static int INSERT = 1; [8v v[n/
public final static int BUBBLE = 2; sFsp`kf
public final static int SELECTION = 3; =]K;"
public final static int SHELL = 4; @Xts}(L
public final static int QUICK = 5; P{h;2b{
public final static int IMPROVED_QUICK = 6; Mpzt9*7R
public final static int MERGE = 7; YAYPof~A$l
public final static int IMPROVED_MERGE = 8; z1{kZk
public final static int HEAP = 9; xrs?"]M[
:<r.n "
public static void sort(int[] data) { IQAV`~_G
sort(data, IMPROVED_QUICK); ,6uON@
} |#^wYZO1U
private static String[] name={ iimTr_TEt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C4Z}WBS(
}; 9nN$%(EO5;
_0Qp[l-
private static Sort[] impl=new Sort[]{ 2v\,sHw+-
new InsertSort(), `q@5d&d`j
new BubbleSort(), 0z1m!tr
new SelectionSort(), ~oWCTj-
new ShellSort(), }6*+>?
new QuickSort(), o$)pJ#";F
new ImprovedQuickSort(), G:7HL5u
new MergeSort(), ?Z9C}t]
new ImprovedMergeSort(), N_Q)AXr)
new HeapSort() P:,'
}; ^cs:S-s
bFD vCF
public static String toString(int algorithm){ @ qy n[C
return name[algorithm-1]; SaceIV%(
} V3r1|{Z(
lI~T>Lel2
public static void sort(int[] data, int algorithm) { ZfsM($|a
impl[algorithm-1].sort(data); z~fZg6
} +GqK$B(x7
'Z5l'Ac
public static interface Sort { 7)SG#|v[$
public void sort(int[] data); ]/g&y5RG
} O<[h
K9O%SfshF
public static void swap(int[] data, int i, int j) { xVw9_il2a
int temp = data; 5#|D1A
data = data[j]; X$Eg(^La
data[j] = temp; cLhHGwX=x
} u5zL;C3O
} {BPNb{dBKr