[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; Y:O%xtGi
} g94NU X
int i1=l; Y`%:hvy~
int i2=mid+1; L49`=p<
for(int cur=l;cur<=r;cur++){ _95V"h
if(i1==mid+1) /IODRso/!
data[cur]=temp[i2++]; ^XV$J-
else if(i2>r) {C [7V{4(%
data[cur]=temp[i1++]; [!"u&iu`
else if(temp[i1] data[cur]=temp[i1++]; CZ|R-ky6p
else l78zS'
data[cur]=temp[i2++]; vNP,c]:%
} Zx@{nVoYe~
} EI'(
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} 2|+**BxHD
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改进后的归并排序: L0}"H .
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package org.rut.util.algorithm.support; ~Os~pTo
ip~PF5
import org.rut.util.algorithm.SortUtil; ^b'[81%
1Nv_;p.{
/** m8.sHw
* @author treeroot 99vm7"5hQ
* @since 2006-2-2 =F6J%$
* @version 1.0 d+$a5 [^9
*/ bX8Bn0#a+
public class ImprovedMergeSort implements SortUtil.Sort { +`zM^'^$
Ie4}F|#=
private static final int THRESHOLD = 10; &{99Owqg
U)2\=%8
/* jvA]EN6$;~
* (non-Javadoc) HKV]Rn
* .7" f~%&oP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (h%!Kun
*/ T0i_X(_
public void sort(int[] data) { ]oj 2
int[] temp=new int[data.length]; zgV{S Qo
mergeSort(data,temp,0,data.length-1); Drz#D1-2
} Z':}ZXy]
4Y[tx]<
private void mergeSort(int[] data, int[] temp, int l, int r) { :beBiO
int i, j, k; #7GbG\
int mid = (l + r) / 2; |,|b~>
if (l == r) 3DbS\jja
return; l:%4@t`
if ((mid - l) >= THRESHOLD) ?Jio9Zr
mergeSort(data, temp, l, mid); YvRMUT
else Gz@'W%6yaV
insertSort(data, l, mid - l + 1); $3k5hDA0e
if ((r - mid) > THRESHOLD) "*a^_tsT?i
mergeSort(data, temp, mid + 1, r); _Uc le
else 7EO/T,{a
insertSort(data, mid + 1, r - mid); s%GhjWZS
?"\X46Gz;
for (i = l; i <= mid; i++) { BNL Q]
temp = data; {fmSmD
} q,A;d^g
for (j = 1; j <= r - mid; j++) { blEs!/A`
temp[r - j + 1] = data[j + mid]; {dTtYL$'"
} :A.dlesv6
int a = temp[l]; /Ii a>XY
int b = temp[r]; 4vQ]7`I.f
for (i = l, j = r, k = l; k <= r; k++) { sz9C':`W
if (a < b) { Z7lv|m&
data[k] = temp[i++]; T_i]y4dg
a = temp; fo@2@
} else { 0 fX
data[k] = temp[j--]; 0j@gC0xu)|
b = temp[j]; <KlG#7M>
} eX;C.[&7;8
} CvS}U%
} Z(k7&^d
)OpB\k
/** NBU[>P
* @param data \$LrL
* @param l E]/` JI'%
* @param i &==X.2XW
*/ bxLeQWr6
private void insertSort(int[] data, int start, int len) { d2Pqi* K
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ( E;!.=%
} !Nua
} KeFEUHU
} .Lbu[
} ?VaWOwWI
lky{<jZ%
堆排序： K=nW|^
mWN9/+!
package org.rut.util.algorithm.support; 4EQ-48h17
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import org.rut.util.algorithm.SortUtil; V/"P};n
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/** %iMRJ}8(7
* @author treeroot ]rU$0)VN
* @since 2006-2-2 [Vzp D 4
* @version 1.0 FtHR.S=u
*/ IY jt*p5
public class HeapSort implements SortUtil.Sort{ rXgU*3RG
w eu3c`-a
/* (non-Javadoc) 9=D09@A%e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X} <p|P+
*/ >,;, 6|S
public void sort(int[] data) { |:Q`9;
MaxHeap h=new MaxHeap(); zI1-l9 o
h.init(data); Qv4g#jX{
for(int i=0;i h.remove(); D_VAtz
System.arraycopy(h.queue,1,data,0,data.length); Twl>Pn>
} cG{>[Lf
walQo^<
private static class MaxHeap{ ]N<:6+
BUhLAO
void init(int[] data){ Y;n;7M<F
this.queue=new int[data.length+1]; P4H%pm{-
for(int i=0;i queue[++size]=data; 2g?O+'JD
fixUp(size); 8y:c3jzP_
} E3%:7MB
} SY&)?~C
,-({m'
private int size=0; :70n%3a
bUJ5jkZ)
private int[] queue; 5^:N]Mp"
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public int get() { z;fi
return queue[1]; /8](M5X]f
} 5BWO7F0v"
vuP.V#
public void remove() { {6E&\
SortUtil.swap(queue,1,size--); 'a1%`rzm
fixDown(1); 3"9'MDKH
} p:g`K#[F
file://fixdown $;@LPE
private void fixDown(int k) { +T\c<lJ9
int j; B{`4"uEb$G
while ((j = k << 1) <= size) { ea7l:(C
if (j < size %26amp;%26amp; queue[j] j++; <S/`-/=2
if (queue[k]>queue[j]) file://不用交换 e(t,~(
break; ~ 8hAmM
SortUtil.swap(queue,j,k); ;ndsq[k>
k = j; <Vu/6"DP
} {Ftz4y)6
} +=Xgi$
private void fixUp(int k) { 02|f@bP.
while (k > 1) { Gn+3OI"
int j = k >> 1; F?>rWP
if (queue[j]>queue[k]) ~QVN^8WPg
break; I)9un|+,y
SortUtil.swap(queue,j,k); !+Ia#(
k = j; \:`'!X1*U
} "'M>%m u
} /d<"{\o
8`edskWrU
} "w0[l"3V
DH@})TN*O
} RfM uWo:
8V]oR3'
SortUtil： ?$:;hGO.<~
` #!~+
package org.rut.util.algorithm; Ujw J}j
x^s2bb
import org.rut.util.algorithm.support.BubbleSort; Cq-d,
import org.rut.util.algorithm.support.HeapSort; -5v2E-
import org.rut.util.algorithm.support.ImprovedMergeSort; HW0EPJ
import org.rut.util.algorithm.support.ImprovedQuickSort; Ai99:J2k
import org.rut.util.algorithm.support.InsertSort; '%k<? *
import org.rut.util.algorithm.support.MergeSort; c_oI?D9
import org.rut.util.algorithm.support.QuickSort; DBUhqRfl
import org.rut.util.algorithm.support.SelectionSort; <M//zXa
import org.rut.util.algorithm.support.ShellSort; EqY e.dF,
+}MV$X
/** SHM ?32'
* @author treeroot !`S`%\"
* @since 2006-2-2 BPFd'-O)
* @version 1.0 UD0via
*/ [#}A]1N
public class SortUtil { }4 p3m]
public final static int INSERT = 1; .Vy*p")"
public final static int BUBBLE = 2; Y;JPr
public final static int SELECTION = 3; }YPW@g
public final static int SHELL = 4; 1Tn0$+$.4
public final static int QUICK = 5; S}0W<H P
public final static int IMPROVED_QUICK = 6; Yn0l}=, n
public final static int MERGE = 7; ?52{s"N0>
public final static int IMPROVED_MERGE = 8; %j '_I\
public final static int HEAP = 9; >,ThIwRN
$-Ud&sjn
public static void sort(int[] data) { LdSBNg#3
sort(data, IMPROVED_QUICK); .iDxq8l
} vSu|!Xb]
private static String[] name={ pt`^4}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" iti~RV,
}; QH_0U`3
o_!=-AWV
private static Sort[] impl=new Sort[]{ m-{t%[Y
new InsertSort(), s`:>"1\|
new BubbleSort(), j\,HquTR
new SelectionSort(), 37#|X*L
new ShellSort(), KK}?x6wV0,
new QuickSort(), 7N@4c
new ImprovedQuickSort(), ~j1.;WId[
new MergeSort(), $]&0`F
new ImprovedMergeSort(), }Pu|%\
new HeapSort() l~f>ve|
}; yQ^k%hHa
mPl2y3m%
public static String toString(int algorithm){ t#kPEiD
return name[algorithm-1]; i\4Qv"%
} ?A!Lh,
Xp(e/QB
public static void sort(int[] data, int algorithm) { ;(]O*{F7k
impl[algorithm-1].sort(data); RoL5uha,l
} M"q]jeaM
=44hI86
public static interface Sort { HwE1cOT
public void sort(int[] data); w|~d3]BqT
} [G(}`u8w"
_`Ojh0@00
public static void swap(int[] data, int i, int j) { c&A;0**K,
int temp = data; U#o5(mK
data = data[j]; 0SoU\/kUi
data[j] = temp; 5if4eitS
} ]6W;~w%
} F vJJpPS