[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; '&s:,o-p
} wCc:HfmjJ
int i1=l; kqv>rA3
int i2=mid+1; *crpM3fO>
for(int cur=l;cur<=r;cur++){ 30[?XVI&
if(i1==mid+1) H VG'v>s@
data[cur]=temp[i2++]; KqaeRs.u
else if(i2>r) 5/Swn9vwl
data[cur]=temp[i1++]; Z.VVY\
else if(temp[i1] data[cur]=temp[i1++]; %n!s{5:F
else 8M:;9a8fh
data[cur]=temp[i2++]; %VSST?aUvX
} Z/56JYt!~
} #!9aTp).AL
&87D.Yy^
} 1<fEz
J%D'Xlb
改进后的归并排序: d) G7U$z~
Px'%5TKN
package org.rut.util.algorithm.support; E%jOJA
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import org.rut.util.algorithm.SortUtil; UHweV:(|T
8pt;''
/** sDWX} NV
* @author treeroot _vvnxG!x&
* @since 2006-2-2 (zye Ch
* @version 1.0 Y.jg }oV
*/ jw#'f%*
public class ImprovedMergeSort implements SortUtil.Sort { 9 `J`(
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private static final int THRESHOLD = 10; l0[jepmpiT
u`K+0^)T`
/* &bnF{~<\
* (non-Javadoc) 7P!/jawxb
* `%F.]|Y0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qe]@`Vg
*/ I=Ws /+
public void sort(int[] data) { 1 dI
int[] temp=new int[data.length]; )#i]exZ
mergeSort(data,temp,0,data.length-1); #Rjm3#gc
} OFCkQEG=y>
nN/v7^^
private void mergeSort(int[] data, int[] temp, int l, int r) { |~rDEv3
int i, j, k; 3"!2C,3c#
int mid = (l + r) / 2; 4$d|}ajH
if (l == r) d/Fjs0pt
return; '-gk))u>)
if ((mid - l) >= THRESHOLD) :3{@LOil^
mergeSort(data, temp, l, mid); Xp._B4g
else $fuFx8`2W
insertSort(data, l, mid - l + 1); 6+m)
if ((r - mid) > THRESHOLD) %|oY8;0|A>
mergeSort(data, temp, mid + 1, r); )^g}'V=vIr
else O)&xT2'J
insertSort(data, mid + 1, r - mid); Yy>%dL
JL2IVENWc
for (i = l; i <= mid; i++) { @5Ril9J[b
temp = data; +;U}SR<
} pShSKRg
for (j = 1; j <= r - mid; j++) { Lm:O vVVB
temp[r - j + 1] = data[j + mid]; B,|M
} Yca9G?^\v
int a = temp[l]; 7Cp>iWV
int b = temp[r]; m'oVqA&
for (i = l, j = r, k = l; k <= r; k++) { Joq9.%7Q
if (a < b) { q.~.1 '`!
data[k] = temp[i++]; 26.iFt/:
a = temp; (!DH'2I[
} else { -:cS}I
data[k] = temp[j--]; fC]+C(*d
b = temp[j]; 6DR@$fpt
} _(J- MCY\
} Pw hs`YGMF
} j$&k;S
9BNAj-Xa
/** [WX+/pm7>
* @param data noh3mi
* @param l tNmH*"wR<
* @param i B;hc|v{(
*/ "`C|;\w
private void insertSort(int[] data, int start, int len) { 8Tv;,a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 76$19
} +J_A*B
} f+%J=Am
} $vlgiJ&f
} uSM4:!8
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堆排序： f![x7D$
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package org.rut.util.algorithm.support; z`>a,X
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import org.rut.util.algorithm.SortUtil; JR'Q Th:z
\TC&/'7}
/** ~e,
* @author treeroot (3{'GX2c
* @since 2006-2-2 =u${2=
* @version 1.0 ~=Er= 0
*/ .;iXe
public class HeapSort implements SortUtil.Sort{ 4xe:+sA.N
`H+ 7Hj
/* (non-Javadoc) Q*(]&qr"E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $ 7O[|:Yv
*/ !*?&V3!
public void sort(int[] data) { `k^ i#Nc>
MaxHeap h=new MaxHeap(); 3=T<c?[
h.init(data); N$p}rh#7{
for(int i=0;i h.remove(); i*W8_C:S
System.arraycopy(h.queue,1,data,0,data.length); w v9s{I{P
} e%(zjCA
( F0.lDZ
private static class MaxHeap{ sjWhtd[fgG
2"yzrwZ:
void init(int[] data){ |>jlY|
this.queue=new int[data.length+1]; D:8-f3
for(int i=0;i queue[++size]=data; j4ypXPY``!
fixUp(size); s2b!Nib
} ?n\~&n'C
} H6bomp"
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private int size=0; \ $X3n\
q6\z]8)
private int[] queue; '[`.&-;
+CX2W('
public int get() { F@"Xd9q?
return queue[1]; SO]x^+[
} IOvYvFUUJ
htMsS4^Kvd
public void remove() { y !47!Dn
SortUtil.swap(queue,1,size--); ;T-i+_
fixDown(1); R:0Fv9bwS
} "EWU:9\0
file://fixdown vb{&T<
private void fixDown(int k) { i,4
int j; JjyQ
while ((j = k << 1) <= size) { { tim{nV
if (j < size %26amp;%26amp; queue[j] j++; XMa(XOnX
if (queue[k]>queue[j]) file://不用交换 gigDrf}
break; rAn''X6H
SortUtil.swap(queue,j,k); <W|{zAyv
k = j; ]rZ"5y
} uhQ3
} e`<=&w
private void fixUp(int k) { vyN=X]p
while (k > 1) { }I;=IYrN
int j = k >> 1; aNv6 "
if (queue[j]>queue[k]) }Jjq]lW
break; K )KE0/n
SortUtil.swap(queue,j,k); x%vt$dy*8
k = j; b0m1O.&I_
} ',*I=JW;
} (^eE8j/K
vh KA8vr
} $T1 D ?X
$-5iwZ
} 8^c|9ow
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SortUtil： pc^(@eD
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package org.rut.util.algorithm; 75Jh(hd(
rM=Q.By+\
import org.rut.util.algorithm.support.BubbleSort; DK*2d_
import org.rut.util.algorithm.support.HeapSort; 9i,QCA
import org.rut.util.algorithm.support.ImprovedMergeSort; !@ai=p
import org.rut.util.algorithm.support.ImprovedQuickSort; YpL{c*M
import org.rut.util.algorithm.support.InsertSort; |+cyb<(V J
import org.rut.util.algorithm.support.MergeSort; <ynmA
import org.rut.util.algorithm.support.QuickSort; QIBv}hgcy
import org.rut.util.algorithm.support.SelectionSort; U/D\N0
import org.rut.util.algorithm.support.ShellSort; A~h.,<+"
+ 5sTGNG
/** yY`<t
* @author treeroot jVi''#F?f
* @since 2006-2-2 :*A6Ba
* @version 1.0 Zo-s_6uC
*/ I&Yu=v/_
public class SortUtil { 3::DURkjf
public final static int INSERT = 1; !_l W#feR
public final static int BUBBLE = 2; ]c[80F-
public final static int SELECTION = 3; 'ZTE"KT
public final static int SHELL = 4; g2:^Z==
public final static int QUICK = 5; hb_YdnG
public final static int IMPROVED_QUICK = 6; G80d!*7
public final static int MERGE = 7; Ax=Rb B"
public final static int IMPROVED_MERGE = 8; Ct$e`H!;
public final static int HEAP = 9; S7E:&E&
t+q:8HNh
public static void sort(int[] data) { Q4CxtY
sort(data, IMPROVED_QUICK); q:J,xC_sF(
} -UUPhGC
private static String[] name={ @xSS`&b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HWVWl~FA
}; k2k/v[60
*oZBv4Vh
private static Sort[] impl=new Sort[]{ _d %H;<_
new InsertSort(), lwQI 9U[O2
new BubbleSort(), =WFMqBh<`
new SelectionSort(), ,K3)f.ArYc
new ShellSort(), G/N'8Q)
new QuickSort(), 5s;HF |2x
new ImprovedQuickSort(), RUYwDtC
new MergeSort(), .OX.z~":y
new ImprovedMergeSort(), B~caHG1b
new HeapSort() >[O @u4
}; sW3-JA]
+\\,FO_
public static String toString(int algorithm){ [=S@lURzm@
return name[algorithm-1]; ~Q>97%
} N/qr}- 3z
!yG{`#NZZ
public static void sort(int[] data, int algorithm) { ?9 :{p
impl[algorithm-1].sort(data); \96?OCdr
} D0lgKQ
`:-{8Vo7
public static interface Sort { L*D-RYW
public void sort(int[] data); wrac\.
} UT==x<
I/pavh
public static void swap(int[] data, int i, int j) { PG&@.KY
int temp = data; y9pQ1H<F;
data = data[j]; /".+OpL
data[j] = temp; k8 ,.~HkU
} d]0fgwwGC
} R`!x<J