[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; $*)??uU
} Wxjv=#3
int i1=l; en\shc{R]`
int i2=mid+1; :00 #l]g0q
for(int cur=l;cur<=r;cur++){ ]RYk Y7>`
if(i1==mid+1) nya-Io.
data[cur]=temp[i2++]; -QH[gi{%`
else if(i2>r) dc#Db~v}k
data[cur]=temp[i1++]; (hywT)#+
else if(temp[i1] data[cur]=temp[i1++]; &P8 Run
else vIBVp
data[cur]=temp[i2++]; rEI]{?eoF
} YG2rJY+*
} L #'N
:,.g_@wvG
} M6n9>aW4
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改进后的归并排序: x;H#-^LxW=
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package org.rut.util.algorithm.support; }7k!>+eQ
g@WGd(o0)
import org.rut.util.algorithm.SortUtil; a`}b'X:
>FtW~J"X
/** C N9lK29F)
* @author treeroot m9*Lo[EXO
* @since 2006-2-2 -w41Bvz0
* @version 1.0 o`^GUY}
*/ RG(m:N
public class ImprovedMergeSort implements SortUtil.Sort { s3m]rC
BoZG^
private static final int THRESHOLD = 10; ]7WBoC8
?3:OPP`s
/* |&ISZFSv
* (non-Javadoc) F|._'i+B!
* GH%'YY3|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (W~jr-O^
*/ W#cr9"'Ta
public void sort(int[] data) { e'<pw^I\
int[] temp=new int[data.length]; 6T%5vg_};'
mergeSort(data,temp,0,data.length-1); bXcDsP$.
} bS 'a)
N*t91 X
private void mergeSort(int[] data, int[] temp, int l, int r) { r4Ygy/%
int i, j, k; ZdQm&?
int mid = (l + r) / 2; y^; =+Z
if (l == r) uA;3R\6?
return; ]+\@_1<ZI
if ((mid - l) >= THRESHOLD) /BWJ)6#H
mergeSort(data, temp, l, mid); MWSx8R)PN
else ?f+w:FO
insertSort(data, l, mid - l + 1); G?-27Jk8
if ((r - mid) > THRESHOLD) y<YVb@O.
mergeSort(data, temp, mid + 1, r); AYHfe#!
else fn|l9k~<O
insertSort(data, mid + 1, r - mid); #plwK-tPR
4-q7o]%5<
for (i = l; i <= mid; i++) { Uo{h. .7?
temp = data; V43pZ]YZ>
} # k+Ggw
for (j = 1; j <= r - mid; j++) { VQHJO I
temp[r - j + 1] = data[j + mid]; Vv(!Ki}
} s{q)m@
int a = temp[l]; Z<a6U 3
int b = temp[r]; 4)=LOGW
for (i = l, j = r, k = l; k <= r; k++) { TQ&%SMCn
if (a < b) { hq9b
data[k] = temp[i++]; yhr\eiJ@6
a = temp; 7 q<UJIf
} else { x&3!z[m@@
data[k] = temp[j--]; {]ZZ]
b = temp[j]; `n8) o%E9
} 8$avPD3jx
} sg12C
} _>HXQ6Hw
ZTG*|
/** 8VvoPlo
* @param data :oF\?e
* @param l yWIM,2x}
* @param i #bPio
*/ p$}iBk0B(z
private void insertSort(int[] data, int start, int len) { -@ #b<"1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <[xxCW(2
} GY4:9Lub7
} p7(xk6W
} Ty%4#9``0
} (]0$^!YK
R!xs;|]
堆排序： )!MeSWGq
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package org.rut.util.algorithm.support; IS7g{:}=p
DLE|ctzj[7
import org.rut.util.algorithm.SortUtil; Kp"mV=RG2T
zMX7 #,
/** !TY4C`/
* @author treeroot \s;]Tg
* @since 2006-2-2 y]=v+Q*+
* @version 1.0 ~az6n)
*/ (c(c MC'
public class HeapSort implements SortUtil.Sort{ ?PWD[mQE\
Ze~ a+%Sb
/* (non-Javadoc) 9QJ=?bIC#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GFvZdP`s4
*/ , j,[4^
public void sort(int[] data) { A<iF37.
MaxHeap h=new MaxHeap(); e =& abu
h.init(data); ld94ek
for(int i=0;i h.remove(); 7"=
System.arraycopy(h.queue,1,data,0,data.length); ,oDZ:";
} g'Ft5fQ"o/
j._9;HifZ
private static class MaxHeap{ +8[h&
@{.rDz
void init(int[] data){ yuswWc'
this.queue=new int[data.length+1]; TEB%y9
for(int i=0;i queue[++size]=data; sCaw"{5qc
fixUp(size); /exV6D r
} u7@|fND 7
} %'`Dd
'jcDfv(v<
private int size=0; iAf, :g
qsFA~{o.
private int[] queue; oypq3V=5
XPzwT2_E
public int get() { =,-80WNsX
return queue[1]; 6fPuTQ}fY>
} ,e>C)wq;
M#})
public void remove() { /'E+(Y&:J
SortUtil.swap(queue,1,size--); $${ebt
fixDown(1); %kNkDI
} *%ZfE,bu8<
file://fixdown j]J2,J
private void fixDown(int k) { qfppJ8L
int j; s;}';#
while ((j = k << 1) <= size) { Mim 9C]h(
if (j < size %26amp;%26amp; queue[j] j++; e@p` -;<
if (queue[k]>queue[j]) file://不用交换 hr@KWE`
break; A3&8@/6,
SortUtil.swap(queue,j,k); -+|0LXo
k = j; 4_PMl6qo
} 6,_CLM
} ekI1j%fO
private void fixUp(int k) { `]WU=Ss
while (k > 1) { wias]u|
int j = k >> 1; Pc? d@tm
if (queue[j]>queue[k]) |Uy hH^
break; (5-"5<-@R
SortUtil.swap(queue,j,k); zDa*n:S
k = j; w[PW-m^`
} h'UWf"d
} E(8!VY ^
FO3!tJ\L
} .IpwTke'
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} Ca+d ?IS
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SortUtil： bLu6|YB
JS&l h
package org.rut.util.algorithm; S?hM
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import org.rut.util.algorithm.support.BubbleSort; (U!WD`Ym
import org.rut.util.algorithm.support.HeapSort; E_WiQ?p
import org.rut.util.algorithm.support.ImprovedMergeSort; 0plRsZ}
import org.rut.util.algorithm.support.ImprovedQuickSort; k6[t$|lMy
import org.rut.util.algorithm.support.InsertSort; !bH-(K{S6
import org.rut.util.algorithm.support.MergeSort; .d8) *
import org.rut.util.algorithm.support.QuickSort; {+ [rJ_
import org.rut.util.algorithm.support.SelectionSort; 3dadeu^{A
import org.rut.util.algorithm.support.ShellSort; E'[pNU*"x-
28X)s!W'
/** }}grJh>tGg
* @author treeroot f(D?g
* @since 2006-2-2 U <4<8'
* @version 1.0 M/d!&Bk
*/ 9]NsWd^^
public class SortUtil { .j7|;Ag
public final static int INSERT = 1; LfOGq%&
public final static int BUBBLE = 2; 'r1&zw(
public final static int SELECTION = 3; |V!A!tB
public final static int SHELL = 4; ,dBtj8=
public final static int QUICK = 5; s.zH.q,
public final static int IMPROVED_QUICK = 6; F\-qXSA
public final static int MERGE = 7; ?3KI}'}EM
public final static int IMPROVED_MERGE = 8; jGI!}4_
public final static int HEAP = 9; Wf: AMxDm
L$@RSKYp
public static void sort(int[] data) { q#sMew\{
sort(data, IMPROVED_QUICK); UfcM2OmbK
} U0jq.]P
private static String[] name={ cty~dzX^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9Od Kh\F (
}; f=/S]o4/3
(nBJ,v)
private static Sort[] impl=new Sort[]{ IeN!nK-
new InsertSort(), ( Y/ DMQ
new BubbleSort(), ,iSs2&$m
new SelectionSort(), 'kW`62AX
new ShellSort(), 7 hnTHL
new QuickSort(), F;q I^{m2
new ImprovedQuickSort(), .^JID~<?#
new MergeSort(), ?0'bf y]
new ImprovedMergeSort(), |C>Yd*E,C
new HeapSort() H7qda'%>
}; VJ_E]}H
9Eg'=YJ
public static String toString(int algorithm){ Wt8;S$!=R
return name[algorithm-1]; LfgR[!
} dhm;
A FfgGO
public static void sort(int[] data, int algorithm) { ?1PY]KNaK
impl[algorithm-1].sort(data); &rw|fF|]
} C:4h
Zls4@/\Q
public static interface Sort { ?r'b Z~
public void sort(int[] data); : ] Y=
} lZn <v'y
qY14LdC}~
public static void swap(int[] data, int i, int j) { {R1jysGtD
int temp = data; Z8'uZ#=Yw
data = data[j]; m"U\;Mw?
data[j] = temp; z)|56 F7'
} r T*:1
} []LNNO],X