[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; laRKt"A
} (NWN&
int i1=l; e4_aKuA
int i2=mid+1; W3-Rs&se
for(int cur=l;cur<=r;cur++){ &oEq&
if(i1==mid+1) i:Ct6[
data[cur]=temp[i2++]; B7jlJqV
else if(i2>r) $Q7E#
data[cur]=temp[i1++]; E*b[.vUp
else if(temp[i1] data[cur]=temp[i1++]; D;8V{Hs
else _ JJ0pc9t
data[cur]=temp[i2++]; fkUH]CdaB
} Q Fqv,B\<
} YQ`#C#Wb
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} h.+&=s!Nsy
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改进后的归并排序: T_B.p*\BM
vi.AzO
package org.rut.util.algorithm.support; D]`B;aE>A*
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import org.rut.util.algorithm.SortUtil; *B~:L"N
t>`LO
/** g~sNY|%
* @author treeroot ImY*cW=M
* @since 2006-2-2 TF3q?0
* @version 1.0 }8]uZ)[p=
*/ .A[.?7g
public class ImprovedMergeSort implements SortUtil.Sort { JfINAaboi
4J$f @6
private static final int THRESHOLD = 10; >-o:> 5
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/* %v)'`|i
* (non-Javadoc) M&T/vByTn_
* d/zX%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uR@Wv^
*/ Zdg{{|mm
public void sort(int[] data) { : MmXH&yR
int[] temp=new int[data.length]; A;nmua-Fv
mergeSort(data,temp,0,data.length-1); =5_F9nk-
} P FFw$\j
BRLU&@G`1
private void mergeSort(int[] data, int[] temp, int l, int r) { [hj'Yg8{
int i, j, k; !Jp.3,\?~
int mid = (l + r) / 2; d_qVk4h\
if (l == r) aC]l({-0
return; `i^1U O
if ((mid - l) >= THRESHOLD) Q+M3Pqy
mergeSort(data, temp, l, mid); M!DoR6
else Y9ce"*b
insertSort(data, l, mid - l + 1); s;f u
if ((r - mid) > THRESHOLD) %,q#f#
mergeSort(data, temp, mid + 1, r); ;-Dd\\)p
else E4ee_`p
insertSort(data, mid + 1, r - mid); C:EoUu
F5q1VEe
for (i = l; i <= mid; i++) { Vta;ibdeqW
temp = data; `7n,(
} ({b/J0<@D
for (j = 1; j <= r - mid; j++) { =gyK*F(RK
temp[r - j + 1] = data[j + mid]; Wfw9cxGkf
} Rp9iX~A`e
int a = temp[l]; Bq8<FZr#!
int b = temp[r]; <W^~Y31:0
for (i = l, j = r, k = l; k <= r; k++) { 2`eu3vA
if (a < b) { EwZt/r
data[k] = temp[i++]; Kg67cmj)f
a = temp; IT33E%G
} else { NU*6iLIq|F
data[k] = temp[j--]; ]g!<5w
b = temp[j]; V1qHl5"
} <v^.FxId
} -e\kIK %
} ~WLsqP5Y~a
U]3JCZ{]0E
/** Bv*h?`Q
* @param data []^>QsS(X
* @param l B ~GyS"
* @param i 4D$E
*/ ']Y:gmM"
private void insertSort(int[] data, int start, int len) { UG$i5PV%i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xGPv3TLH^
} Wd<}|?R
} 9V!K._Cb
} T^SOq:m&
} gE(03SX
K)Ka"H
堆排序： %LmB`DqZ
AkC\CdmA
package org.rut.util.algorithm.support; pDfF'jt9
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import org.rut.util.algorithm.SortUtil; =T6\kz9)`
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/** c+VUk*c3
* @author treeroot qQryv_QP
* @since 2006-2-2 Jy$-)
* @version 1.0 b5C #xxIO
*/ ibL;99#
public class HeapSort implements SortUtil.Sort{ T]k@g_
r|8..Ll
/* (non-Javadoc) lPP7w`[PA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ok\UIi~
*/ GM~jR-FZ
public void sort(int[] data) { ::w%rv
MaxHeap h=new MaxHeap(); kY&j~R[C
h.init(data); wDzS<mm
for(int i=0;i h.remove(); E2cmT$6
System.arraycopy(h.queue,1,data,0,data.length); I.x>mN-0
} %/p5C
\!Pm^FD .
private static class MaxHeap{ yR-.OF,c
I(|{/{P,
void init(int[] data){ (>'d`^kjk
this.queue=new int[data.length+1]; 6zSN?0c
for(int i=0;i queue[++size]=data; .v'8G)6g
fixUp(size); PeZ=ONY5
} >EG;2]M&
} $TiAJ}:
IFe[3mB5
private int size=0; gUlZcb
E.brQx#}
private int[] queue; Z~<V>b
ektFk"W3A\
public int get() { r\?*?sL
return queue[1]; EhoR.
} +`xp+Q
DzMkeX
public void remove() { Zf! 7pM
SortUtil.swap(queue,1,size--); H>?@nYP
fixDown(1); 5sRNqTIr
} ;+\;^nS3d
file://fixdown /V~(!S>
private void fixDown(int k) { Fej$`2mRH
int j; z Ey&%Ok
while ((j = k << 1) <= size) { 9i@*\Ada
if (j < size %26amp;%26amp; queue[j] j++; |tkmO:
if (queue[k]>queue[j]) file://不用交换 ,;g:qe3D$
break; a?dM8zAnc
SortUtil.swap(queue,j,k); TM9>r :j'
k = j; G1BVI:A&S
} dBkB9nz
} Z2r\aZ-d`
private void fixUp(int k) { `1dr$U
while (k > 1) { gKnAw+u\
int j = k >> 1; l"64w>,
if (queue[j]>queue[k]) #i?TCO
break; p O.8>C%
SortUtil.swap(queue,j,k); ;6Z?O_zp4
k = j; !&kOqc5:t<
} >ObpOFb%
} S<44{ oH
x<"e
} vv3?ewr y
G.;<?W
} 6_7d1.wv9
Ek:u[Uw\
SortUtil： /V^S)5r
*)Y;`Yg$
package org.rut.util.algorithm; }[|"db
BdSTB"
import org.rut.util.algorithm.support.BubbleSort; p<YO3@B+
import org.rut.util.algorithm.support.HeapSort; ck;owGlT
import org.rut.util.algorithm.support.ImprovedMergeSort; 3N-(`[m{E
import org.rut.util.algorithm.support.ImprovedQuickSort; 6 J#C
import org.rut.util.algorithm.support.InsertSort; yq2Bz7P
import org.rut.util.algorithm.support.MergeSort; Nt)9-\T
import org.rut.util.algorithm.support.QuickSort; a2zo_h2R
import org.rut.util.algorithm.support.SelectionSort; %(i(ZW "
import org.rut.util.algorithm.support.ShellSort; AdhCC13B
IkupW|}rc
/** x&sF_<[
* @author treeroot ({)_[dJ'
* @since 2006-2-2 q /#O :Q
* @version 1.0 $O[ut.
*/ (%bfNs|
public class SortUtil { RZ -w,~
public final static int INSERT = 1; 6eb5q/
public final static int BUBBLE = 2; S5;q)qz2J
public final static int SELECTION = 3; db`<E <
public final static int SHELL = 4; K_xn>
public final static int QUICK = 5; CZ@M~Si_
public final static int IMPROVED_QUICK = 6; oR~+s&c
public final static int MERGE = 7; 8.@yD^'
public final static int IMPROVED_MERGE = 8; :geXplTx
public final static int HEAP = 9; `g#\ Ws
E:7vm@+
public static void sort(int[] data) { g wk\[I`;
sort(data, IMPROVED_QUICK); GYj`-t
} gpPktp2
private static String[] name={ hPl;2r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dK=BH=S2?X
}; pz(clTOD:
?C_%"!GR
private static Sort[] impl=new Sort[]{ 6rk/74gI,a
new InsertSort(), KxvT}"k
new BubbleSort(), +_+_`q>]
new SelectionSort(), ]M_)f
new ShellSort(), Vi]D](^!
new QuickSort(), RD~QNj9,T
new ImprovedQuickSort(), z*FlZLHY
new MergeSort(), Ih{~?(V$
new ImprovedMergeSort(), 2)G ZU
new HeapSort() X;-,3dy
}; a].Bn#AH!C
]UMwpL&rY
public static String toString(int algorithm){ ;$Wa=wHb
return name[algorithm-1]; "~GudK &
} pt=[XhxC(>
H`fkds
public static void sort(int[] data, int algorithm) { X,~8) W
impl[algorithm-1].sort(data); luV%_[F
} `toSU>:
kG%<5QH
public static interface Sort { 7"M7N^
public void sort(int[] data); 4((Z8@iX/
} 9~N7hLT
%e_WO,R
public static void swap(int[] data, int i, int j) { U9Y'eP.2
int temp = data; u+{5c5_
data = data[j]; n6oVx5/
data[j] = temp; |ek*wo
} e&E*$G@.7
} h1,J<B@