[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; O7&6]/`
} ;3~+M:{2
int i1=l; QLr.5Wcg>
int i2=mid+1; ~!bA<q
for(int cur=l;cur<=r;cur++){ s/' ]* n
if(i1==mid+1) 1?6zsA%N
data[cur]=temp[i2++]; 'JA<q-Gn
else if(i2>r) V4~`yT?*"
data[cur]=temp[i1++]; Ft} h&aYP
else if(temp[i1] data[cur]=temp[i1++]; X,+M?
else %3ieR}:/e&
data[cur]=temp[i2++]; >m66j2(H*Z
} ~hx__^]d
} >)V1aLu=
Ze?(N~
} 2D`_!OG=
?+^vU5b1u
改进后的归并排序: `dp]N0nz
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package org.rut.util.algorithm.support; bUcq LV
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import org.rut.util.algorithm.SortUtil; h_xHQf&#
{Z~5#<t
/** i.~*G8!DM
* @author treeroot },tN{()
* @since 2006-2-2 GxFmw:
* @version 1.0 Py}] {?
*/ R:[IH2F s
public class ImprovedMergeSort implements SortUtil.Sort { e#R'_}\yj
&@dMIJK"(
private static final int THRESHOLD = 10; -D?-ctFYj^
ysHmi{V~
/* ?WD JWp%
* (non-Javadoc) K |Z]
* o?T01t=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cz{5-;$9Z
*/ ZvSWIQ6
public void sort(int[] data) { il403Ae0
int[] temp=new int[data.length]; n"Gow/-;
mergeSort(data,temp,0,data.length-1); *F_ dP
} q3SYlL'a
!}+rg2
private void mergeSort(int[] data, int[] temp, int l, int r) { K0YUN^St
int i, j, k; XFS"~{
int mid = (l + r) / 2; _--kK+rU
if (l == r) Pl9Ky(Q`V
return; ^y1P~4w?
if ((mid - l) >= THRESHOLD) OS.oknzZZ
mergeSort(data, temp, l, mid); ?J1x'/G
else Q*GJREC
insertSort(data, l, mid - l + 1); qRX:eo
if ((r - mid) > THRESHOLD) $@R[$/
mergeSort(data, temp, mid + 1, r); l7p*::(9
else b+6%Mu}o
insertSort(data, mid + 1, r - mid); --t5jSS44
Gv$}>YJ
for (i = l; i <= mid; i++) { E+tV7xa~
temp = data; ;DG&HO
} VvS ^f
for (j = 1; j <= r - mid; j++) { Qgel^"t]i
temp[r - j + 1] = data[j + mid]; YtWO=+rX
} D{Rk9MKkE
int a = temp[l]; #xlT,:_:)
int b = temp[r]; 'u)zQAaw.
for (i = l, j = r, k = l; k <= r; k++) { X / {;
if (a < b) { :VB{@ED
data[k] = temp[i++]; 8}A+{xVp8
a = temp; EAE\'9T&g
} else { QL{^
data[k] = temp[j--]; <"SOH;w
b = temp[j]; >E:V7Fa
} 2y"|l
} Vw P+tM
} 8rXQK|A
P%nN#Qm
/** \A ?B{*
* @param data #+<"`}]N
* @param l jJB+UF=
* @param i iFi6,V*PRt
*/ [*jvvkAp
private void insertSort(int[] data, int start, int len) { 7/:C[J4GTN
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C@$!'^ 61
} Te:4z@?
} Z_tK3kQa@&
} q!sazVaDp
} 2VY.#9vl
T]#S=]G
堆排序： 7H~J?_
C@7<0w
package org.rut.util.algorithm.support; /%P|<[< [
tzKIi_2
import org.rut.util.algorithm.SortUtil; ?f{--|V
jEkO#xI
/** aJmSagr69C
* @author treeroot lebwGW,!
* @since 2006-2-2 Pm Zb!|
* @version 1.0 [J`%iU
*/ $}*bZ~
public class HeapSort implements SortUtil.Sort{ RF,[1O-\O
2c Pd$j
/* (non-Javadoc) C(Bh<c0@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vo@gxC,
*/ _$oN"pj
public void sort(int[] data) { fC\Cx;q-
MaxHeap h=new MaxHeap(); A5A4*.C
h.init(data); oXQzCjX_
for(int i=0;i h.remove(); 4=T.rVS[
System.arraycopy(h.queue,1,data,0,data.length); ;nDCyn4i]
} GO|1O|?
zFn!>Tqe
private static class MaxHeap{ sX :)g>b
YoT<]'
void init(int[] data){ gYtv`O
this.queue=new int[data.length+1]; ,?OWwm&J
for(int i=0;i queue[++size]=data; Bc^%1
fixUp(size); l[_y|W5
} ./iC
} I 19 /
;g:!WXd
private int size=0; ++HHUM
323zR*\m
private int[] queue; 08+cNT
-_p+4tV
public int get() { b%TS37`^[
return queue[1]; whA
} ;VLv2J*
Q7~9~
public void remove() { Y%i=u:}fm
SortUtil.swap(queue,1,size--); rmzM}T\20
fixDown(1); &{x%"Aq/
} xYgG
file://fixdown {D6E@a
private void fixDown(int k) { s%{8$>8V.
int j; sM4Qu./
while ((j = k << 1) <= size) { 6c?;-5.
if (j < size %26amp;%26amp; queue[j] j++; em@bxyMm
if (queue[k]>queue[j]) file://不用交换 ZSBa+3;z
break; JB_<Haj
SortUtil.swap(queue,j,k); 7eM:YqT/#
k = j; *b$8O
} 2i~tzo
} :3uCW1
private void fixUp(int k) { XMR$I&;G8
while (k > 1) { t7t?xk!2
int j = k >> 1; tR!!Q
if (queue[j]>queue[k]) $RFy9(>
break; *tWZ.I<<
SortUtil.swap(queue,j,k); TpHvZ]c
k = j; )r9lT*z
} L7gZ4Hu=`
} p}b:(QN~m
J$]-)`[G&
} @y|ZXPC#
sULCYiT|Hn
} 2/T4.[`t
\~LwlOo%R
SortUtil： 8RA]h?$$J
n]15 ~GO.
package org.rut.util.algorithm; :c*_W /
B8f BX!u/
import org.rut.util.algorithm.support.BubbleSort; 5-=&4R\k
import org.rut.util.algorithm.support.HeapSort; '=M4(h
import org.rut.util.algorithm.support.ImprovedMergeSort; lj U|9|v
import org.rut.util.algorithm.support.ImprovedQuickSort; h()Ok9]
import org.rut.util.algorithm.support.InsertSort; ![>j`i
import org.rut.util.algorithm.support.MergeSort; c}QWa"\2n
import org.rut.util.algorithm.support.QuickSort; 6>fQe8Y
import org.rut.util.algorithm.support.SelectionSort; "vH>xBR[%
import org.rut.util.algorithm.support.ShellSort; $N}nO:`t
DX*eN"z[
/** ! H^,p$`[i
* @author treeroot <hJ%]]
* @since 2006-2-2 2 SJN;A~}
* @version 1.0 D~(f7~c%
*/ SZ;Is,VgU4
public class SortUtil { l{2Y[&%
public final static int INSERT = 1; 2!}:h5
public final static int BUBBLE = 2; C:?mOM#_
public final static int SELECTION = 3; <$V!y dO
public final static int SHELL = 4; -MCDX^>P
public final static int QUICK = 5; .# Jusd
public final static int IMPROVED_QUICK = 6; |5;:3K+
public final static int MERGE = 7; =vpXYj
public final static int IMPROVED_MERGE = 8; >" z$p@7
public final static int HEAP = 9; THOXs; k0
/^2&@P7
public static void sort(int[] data) { -;i vBR
sort(data, IMPROVED_QUICK); )6t=Bel
} w[/_o,R
private static String[] name={ &4dh$w]q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2i4&*&A
}; 5LkpfmR
.!B>pp(9
private static Sort[] impl=new Sort[]{ 8+?|4'\`
new InsertSort(), L]syDn
new BubbleSort(), Z ZMz0^V
new SelectionSort(), BJL*Dihm[
new ShellSort(), 8iIz!l%O
new QuickSort(), m?@0Pf}xa
new ImprovedQuickSort(), QMI6l'"s
new MergeSort(), #guq/g$
new ImprovedMergeSort(), (H_YYZ3ZX
new HeapSort() @ uF$m/g
}; )[Bl3+'
K,$Ro@!
public static String toString(int algorithm){ =8p *Ijs
return name[algorithm-1]; 6]mFw{6qn1
} ,~TV/l<
f\zu7,GU
public static void sort(int[] data, int algorithm) { Y~fa=R{W
impl[algorithm-1].sort(data); T``O!>J
} G(*7hs
"A>/m"c]*
public static interface Sort { jx?"m=`s:
public void sort(int[] data); KJLC2,
} < 9 vS
|#Q4e51H
public static void swap(int[] data, int i, int j) { +J+[fbqX
int temp = data; *.2[bQL@v
data = data[j]; 1%^d<%,]
data[j] = temp; !ot$Q
} =a]B#uUn
} |nu)=Ag