[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; )g0lI
} Dyov}y
int i1=l; RLmOg{L
int i2=mid+1; WE<?y_0y&
for(int cur=l;cur<=r;cur++){ y+k_&ss
if(i1==mid+1) !#tVQ2O
data[cur]=temp[i2++]; &`"DG$N(
else if(i2>r) IC`3%^
data[cur]=temp[i1++]; diq}\'f
else if(temp[i1] data[cur]=temp[i1++]; DXFu9RE\{
else 51#*8u+L
data[cur]=temp[i2++]; RJrz ~,}
} SK<Rk
} 3[YG BM(
v, $r.g;
} t un}rdb
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改进后的归并排序: zC?'Qiuh*
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package org.rut.util.algorithm.support; Wv;0PhF
sZ.<:mu[
import org.rut.util.algorithm.SortUtil; zA,vp^
CWj_K2=d
/** Av X1*
* @author treeroot N'Gq9A
* @since 2006-2-2 ~f/|bcep
* @version 1.0 <Vat@e
*/ Wh[QR-7Ew
public class ImprovedMergeSort implements SortUtil.Sort { `zd,^.i5~
7+O)AU{
private static final int THRESHOLD = 10; )`u17 {
KII{GDR]
/* j{@O%fv=
* (non-Javadoc) 4ot<Uw5
* $%<{zWQm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #8$?# dT
*/ :ym?]EL4o
public void sort(int[] data) { SeX]|?D
int[] temp=new int[data.length]; #EzBB*kP
mergeSort(data,temp,0,data.length-1); Dd3f@b[WX
} -;""l{
o3J#hQrl
private void mergeSort(int[] data, int[] temp, int l, int r) { =7Ln&tZ
int i, j, k; }0'=}BE
int mid = (l + r) / 2; 3]Z1kB
if (l == r) N5 ME_)
return; &5CRXf
if ((mid - l) >= THRESHOLD) m4:c$5
mergeSort(data, temp, l, mid); ~?ab_CY
else ^7gGtz2
insertSort(data, l, mid - l + 1); zj 6I:Qr
if ((r - mid) > THRESHOLD) AjzTszByu
mergeSort(data, temp, mid + 1, r); -<W?it?D
else |23F@s1
insertSort(data, mid + 1, r - mid); j-<]OOD
j3j?2#vR
for (i = l; i <= mid; i++) { ]l,BUf-O
temp = data; vygzL U^
} ' \JE>#
for (j = 1; j <= r - mid; j++) { _^NX`<&
temp[r - j + 1] = data[j + mid]; > p`,
} mH o#"tc
int a = temp[l]; ,7{|90'V<
int b = temp[r]; ~q$]iwwqT
for (i = l, j = r, k = l; k <= r; k++) { [FFr}\}bY
if (a < b) { M4^G3c<
data[k] = temp[i++]; q<3nAE$?=
a = temp; CM6% g f3
} else { !fh (k
data[k] = temp[j--]; Q!X?P
b = temp[j]; OO:S2-]Y>e
} uLhGp@Dx
} Od1\$\4Z
} q_MN
\PrJy6&
/** iw@rW5%'~
* @param data Q(|@&83].
* @param l A8{jEJ=)P
* @param i ZmA}i`
*/ 1w,_D.1'
private void insertSort(int[] data, int start, int len) { c<lp<{;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); RS5<] dy
} f:o.[4p2
} ~_THvx1
} M2$/x`\-~
} c%&,(NJ]K
19 5_1?'<
堆排序： 0'^M}&zCi
Y}~sTuWU
package org.rut.util.algorithm.support; >xWS>
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import org.rut.util.algorithm.SortUtil; iZGbNN
u 3WU0Z`
/** {X!vb
* @author treeroot )CGQ}
* @since 2006-2-2 =RoE=)1&-
* @version 1.0 `<XS5h h=
*/ '+Dsmoy
public class HeapSort implements SortUtil.Sort{ tXE/aY*I
dOjly,!
/* (non-Javadoc) pF;.nt)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qe]D4K8`Q3
*/ I?T !
public void sort(int[] data) { {^]qaQ[5N
MaxHeap h=new MaxHeap(); HQ-[k$d W4
h.init(data); wL;OQhI
for(int i=0;i h.remove(); lrrTeE*
System.arraycopy(h.queue,1,data,0,data.length); *G"hjc$L
} X3:1KDVsV
}7PJr/IuF
private static class MaxHeap{ ;,y_^-h;
,Ag{-&
void init(int[] data){ hY)zKX_r
this.queue=new int[data.length+1]; 0'sZ7f<e7
for(int i=0;i queue[++size]=data; dXyMRGRUq
fixUp(size); 2&hv6Y1
} kZ9Gl!g
} x{H+fq,M
5ibr1zs
private int size=0; Yy~x`P'g!
e$LC
private int[] queue; 9Po>laT 5
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public int get() { 3.Fko<D4jD
return queue[1]; KOixFn1
} 7%h;To-<6
2> a&m>
public void remove() { ,xwiJfG; ]
SortUtil.swap(queue,1,size--); #X(2
fixDown(1); 1P)K@j
} 175e:\Tw
file://fixdown %1&X+s3
private void fixDown(int k) { G^'We6<
int j; g;l K34{
while ((j = k << 1) <= size) { (Mv~0ShakO
if (j < size %26amp;%26amp; queue[j] j++; 6(rm%c
if (queue[k]>queue[j]) file://不用交换 8\J$\Edv
break; l;-2hZ
SortUtil.swap(queue,j,k); ZayJllaq^
k = j; |Iy;_8c
} {$S"Sj
} !(*&P
private void fixUp(int k) { m"L^tSD~
while (k > 1) { [REH*_
int j = k >> 1; B:>:$LIL
if (queue[j]>queue[k]) QPuc{NcB>
break; =svFw&q"
SortUtil.swap(queue,j,k); JMAdsg/
k = j; R0t!y3r&N
} =CzGI|pb
} :k9T`Aa]
<?41-p-;
} +G;<D@gSa0
m%9Yo%l~
} J;sQvPHV8
7[e-3
SortUtil： NSVE3
A6z2KVk
package org.rut.util.algorithm; S{llpp{E
1 -Z&/3T]
import org.rut.util.algorithm.support.BubbleSort; O0}uY:B
import org.rut.util.algorithm.support.HeapSort; 7\@c1e*e
import org.rut.util.algorithm.support.ImprovedMergeSort; p3_ Qx
import org.rut.util.algorithm.support.ImprovedQuickSort; SX,$$43
import org.rut.util.algorithm.support.InsertSort; X#1WzWk'
import org.rut.util.algorithm.support.MergeSort; 8kKL=
import org.rut.util.algorithm.support.QuickSort; k;qS1[a
import org.rut.util.algorithm.support.SelectionSort; CG uuadNI
import org.rut.util.algorithm.support.ShellSort; #x 6/"Y2
Up Z 9g"
/** hUpour |b
* @author treeroot (~Z&U
* @since 2006-2-2 [l=@b4Og
* @version 1.0 OX,em Ti
*/ 5$i(f8*
public class SortUtil { r?KRK?I
public final static int INSERT = 1; F=5+JjrX
public final static int BUBBLE = 2; )]n>.ZmLCB
public final static int SELECTION = 3; g Cp`J(2v:
public final static int SHELL = 4; kNP-+o
public final static int QUICK = 5; KXZG42w
public final static int IMPROVED_QUICK = 6; LYAGpcG
public final static int MERGE = 7; <hzHrx'o{
public final static int IMPROVED_MERGE = 8; Cuylozj$&
public final static int HEAP = 9; Dx\~#$S!=
"d}']M?-h
public static void sort(int[] data) { ,t_&tbf3
sort(data, IMPROVED_QUICK); tOXyle~C
} Ew4D';&;
private static String[] name={ 9z?c0W5x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rvx2{1}I
}; `;Ui6{|
'!$QI@@
private static Sort[] impl=new Sort[]{ uj;iE 9
new InsertSort(), rHk(@T.]
new BubbleSort(), ~LI}
new SelectionSort(), A}! A*z<9
new ShellSort(), L@RnLaoQ
new QuickSort(), &%v*%{|j
new ImprovedQuickSort(), sct3|H#
new MergeSort(), WiZkIZ
new ImprovedMergeSort(), 46M=R-7=
new HeapSort() em7L`,
}; <e&v[
_W@sFv%sj
public static String toString(int algorithm){ xTk6q*NvT^
return name[algorithm-1]; ]G&[P8hzB
} 3N]ushMO
b+Sj\3fX
public static void sort(int[] data, int algorithm) { ql%K+4@
impl[algorithm-1].sort(data); i=5!taxu}E
} krGIE}5
O-0 5.
public static interface Sort { 'RwfW|~6
public void sort(int[] data); Qraq{'3
} yl*%P3m|
;=2JbA+"G
public static void swap(int[] data, int i, int j) { zM8 jjB
int temp = data; k %{q q v
data = data[j]; 37n2#E
data[j] = temp; AW;xlY= g
} Q@p'nE,
} pv4#`.m