[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; zJ8T.+qJ
} dT7fyn
int i1=l; Wkk(6gS,
int i2=mid+1; 3)=ix. wW
for(int cur=l;cur<=r;cur++){ |-/@3gPO
if(i1==mid+1) L6nsVL&
data[cur]=temp[i2++]; F^Jz
else if(i2>r) k^K76mB
data[cur]=temp[i1++]; {*hFG:u
else if(temp[i1] data[cur]=temp[i1++]; 7)#JrpTj%
else #| gh
data[cur]=temp[i2++]; _8 K|2$X
} }eZ\~2
} Jg'#IM
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改进后的归并排序: Sb2_&5
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package org.rut.util.algorithm.support; /[>_Ry,
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import org.rut.util.algorithm.SortUtil; &I'J4gk[
K9&Q@3V
/** {GCp5
* @author treeroot hTv*4J&@|
* @since 2006-2-2 ;DZj.|Sj+
* @version 1.0 rf+}J_
*/ S\I+UeFkf
public class ImprovedMergeSort implements SortUtil.Sort { 4PS|
p</t##]3ks
private static final int THRESHOLD = 10; 8kU(>' ^_:
l> H'PP~
/* i}>EGmv m
* (non-Javadoc) NqKeQezX
* 8|i<4>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Y~^R^J
*/ $;ny`^8
public void sort(int[] data) { |p*cI @
int[] temp=new int[data.length]; X_Lt{mf
mergeSort(data,temp,0,data.length-1); d<OdQvW.
} qu$FpOJ
zD8$DG8
private void mergeSort(int[] data, int[] temp, int l, int r) { o\it]B
int i, j, k; #H Jlm1d
int mid = (l + r) / 2; Z&H_+u3j
if (l == r) }8"i~>>a
return; 17l?li
if ((mid - l) >= THRESHOLD) pg,JYn
mergeSort(data, temp, l, mid); .sj/Lw}
else 3''Kg<k,I
insertSort(data, l, mid - l + 1); d?YSVmG
if ((r - mid) > THRESHOLD) sLTQm*jL
mergeSort(data, temp, mid + 1, r); qycf;Kl:6
else HXdo:#xEO
insertSort(data, mid + 1, r - mid); /u]#dX5
=$^}"}$
for (i = l; i <= mid; i++) { M54czo=l
temp = data; ZK2&l8
} HtE^7i*_
for (j = 1; j <= r - mid; j++) { 438r]f?0|{
temp[r - j + 1] = data[j + mid]; DrBkR`a?
} jc>B^mqx
int a = temp[l]; Jk|DWZ
int b = temp[r]; o(v7&m;
for (i = l, j = r, k = l; k <= r; k++) { dKDCJt]t
if (a < b) { W>{&" 5
data[k] = temp[i++]; >N`, 3;Z
a = temp; 0%\fm W j
} else { }4c$_
data[k] = temp[j--]; 0?I
b = temp[j]; cyjgi /Z
} i[.7 8K-s
} 1v3
} EXW?)_pg
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/** Z!'kN\z
* @param data g?j^d:
* @param l "<&o;x<
* @param i #sv}%oV,F
*/ ib]<;t
private void insertSort(int[] data, int start, int len) { rfgsas{F
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i6;rh-M?.
} /K+;HAUTn
} XCn;<$3w
} 7:$dl#
} 4RQ38%> >j
3|3ad'
堆排序： B<@a&QBTg
MScUrW!TA
package org.rut.util.algorithm.support; v33[Rk'
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import org.rut.util.algorithm.SortUtil; _ qQ
#^-'q`)
/** ~xPetkl@
* @author treeroot Qd?S~3XT
* @since 2006-2-2 fR2,NKM@
* @version 1.0 oc-o>H
*/ j~;y~Cx?
public class HeapSort implements SortUtil.Sort{ [P)](8nR[
5*B'e{C
/* (non-Javadoc) ^ 6t"A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Cf<TDjU`|
*/ xw1,Wbu]
public void sort(int[] data) { EW)r/Av:,
MaxHeap h=new MaxHeap(); kAxJ#RG
h.init(data); OWYY2&.h
for(int i=0;i h.remove(); B(-F|q\
System.arraycopy(h.queue,1,data,0,data.length); ~g~`,:Qc
} 0r&FH$
q7rX4-G$
private static class MaxHeap{ -/7@ A
\IR$~
void init(int[] data){ fv>Jn`
this.queue=new int[data.length+1]; * _,yK-et
for(int i=0;i queue[++size]=data; $K|2k7
fixUp(size); A>:31C
} zFwO(
} eo"XHP7ja
')fIa2dO/
private int size=0; }4Gn$'e
8h|~>v
private int[] queue; ]HG>Og
^#7&R"
public int get() { ~~ty9;KYL
return queue[1]; ^M1O)
} T?-K}PUcQ
7tY~8gQel
public void remove() { fX&g. fH
SortUtil.swap(queue,1,size--); Hu!<GB~
fixDown(1); B=%YD"FAv
} N,cj[6;T%
file://fixdown n2(\pQKm
private void fixDown(int k) { =G rg
int j; h{E9rc1,
while ((j = k << 1) <= size) { lg jY\?
if (j < size %26amp;%26amp; queue[j] j++; Lg6>\Z4
if (queue[k]>queue[j]) file://不用交换 7H[.o~\
break; 6SSrkj}U
SortUtil.swap(queue,j,k); ?Y$3R"p@3`
k = j; 23zR0z(L
} -]Oi/i,{
} wS:`c J
private void fixUp(int k) { F2=#\U$
while (k > 1) { QVN@B[9
int j = k >> 1; $)(Zt^
if (queue[j]>queue[k]) @Z~0!VY
break; Ti5"a<R4m6
SortUtil.swap(queue,j,k); YdAC<,e&A
k = j; ".fnx8v,
} C2 !F
} `[f IK,
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} 7q^a@5f BG
xSjs+Y;Mu
} sQY0Xys<4
Bq\WG=Fd
SortUtil： /9C>{29x!
jATN):8W
package org.rut.util.algorithm; 4+0:(=>[%
tpKQ$)ed
import org.rut.util.algorithm.support.BubbleSort; \88IFE
import org.rut.util.algorithm.support.HeapSort; @,q<][q
import org.rut.util.algorithm.support.ImprovedMergeSort; T:udw
import org.rut.util.algorithm.support.ImprovedQuickSort; N8]d0
import org.rut.util.algorithm.support.InsertSort; k%cT38V*
import org.rut.util.algorithm.support.MergeSort; FBI^}^#_
import org.rut.util.algorithm.support.QuickSort; a^9}ceu?
import org.rut.util.algorithm.support.SelectionSort; &R}2/Mt
import org.rut.util.algorithm.support.ShellSort; /vFdhh
`ve5>aw0_Y
/** 4*+)D8
* @author treeroot T(eNK c2
* @since 2006-2-2 }nNCgH
* @version 1.0 3ry0.
*/ [UaM}-eR
public class SortUtil { Pexg"328
public final static int INSERT = 1; )G9,5[
public final static int BUBBLE = 2; Ob7F39):N
public final static int SELECTION = 3; 7ZpU -':
public final static int SHELL = 4; *s"{JrG`O
public final static int QUICK = 5; "V7&@3
public final static int IMPROVED_QUICK = 6; 0-A@X>6bs
public final static int MERGE = 7; ).>O6A4:C
public final static int IMPROVED_MERGE = 8; ,N5-(W
public final static int HEAP = 9; +t;j5\HS
?-PW$p
public static void sort(int[] data) { |Ns[{/
sort(data, IMPROVED_QUICK); >c8EgSZJ
} >1d`G%KfG
private static String[] name={ ,7|2K&C5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r;&rc:?A
}; ;(9q, )
kA<58,!
private static Sort[] impl=new Sort[]{ Y-c_ 2 )
new InsertSort(), C+c;UzbD
new BubbleSort(), t[^68]
new SelectionSort(), @{UtS2L
new ShellSort(), 9.$k^|~
new QuickSort(), XhJbBVS|
new ImprovedQuickSort(), /*{s1Zcb
new MergeSort(), |<1
new ImprovedMergeSort(), WJ$!W
new HeapSort() ukRbSJ5a5
}; "EC,#$e%ev
rQPV@J]:
public static String toString(int algorithm){ L(eLxw e%
return name[algorithm-1]; 4o*wLCo7^
} !BW6l)=L
cYp]zn+6
public static void sort(int[] data, int algorithm) { '0>w_ge4
impl[algorithm-1].sort(data); 2q.J1:lW
} &8uq5uKg
*J] }bX
public static interface Sort { '\.fG\xD
public void sort(int[] data); c2<JS:!*
} D>Dch0{H,:
1-60gI1)
public static void swap(int[] data, int i, int j) { 8!{F6DG
int temp = data; $17utJ58
data = data[j]; MHkTN
data[j] = temp; Kr'5iFK7
} oefhJM!y
} jO#5ZhG