[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; oIdMDp^$
} +e. bO5Y
int i1=l; 7Co }4
int i2=mid+1; v4kk4}lE
for(int cur=l;cur<=r;cur++){ %,g6:Zc@
if(i1==mid+1) -)(HG)3
data[cur]=temp[i2++]; #>g]CRN
else if(i2>r) m*tmmP4R
data[cur]=temp[i1++]; )s4#)E1
else if(temp[i1] data[cur]=temp[i1++]; Lj6$?(x}
else m;)[gF
data[cur]=temp[i2++]; C s?kZ %
} tRZCOEo4
} ^CX=<
ABvB1[s#
} ]e@'9`G-'
MYFRrcu;
改进后的归并排序: N%'=el4L
s"#>Xc
package org.rut.util.algorithm.support; '\Z54$
lPFT)>(+@
import org.rut.util.algorithm.SortUtil; by,"Orpwq;
]fg?)z-Z
/** hVo]fD|W
* @author treeroot 4<CHwIRHY
* @since 2006-2-2 rwGY)9|
* @version 1.0 ^\Gaf5{
*/ \2~Cn c*O
public class ImprovedMergeSort implements SortUtil.Sort { M^DYzJ
a^t#kdT
private static final int THRESHOLD = 10; z)I.^
}DjW
/* PB*mD7"
* (non-Javadoc) NCbn<ojb
* nm2bBX,fh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZG+8kt!w
*/ $e1==@ R
public void sort(int[] data) { ohklLZoZ
int[] temp=new int[data.length]; |{udd~oE&
mergeSort(data,temp,0,data.length-1); =Bu>}$BD
} g0NtM%
:^]rjy/|+
private void mergeSort(int[] data, int[] temp, int l, int r) { ~fbFA?g3
int i, j, k; _0p8FhNt
int mid = (l + r) / 2; ' ^L|}e
if (l == r) /@-!JF#g
return; feSd%
if ((mid - l) >= THRESHOLD) Gv?3T Am8
mergeSort(data, temp, l, mid); PLlad\
else sw A^oU
insertSort(data, l, mid - l + 1); #InuN8sI
if ((r - mid) > THRESHOLD) g.$a]pZz
mergeSort(data, temp, mid + 1, r); 8i"v7}
else <WhdQKFf-
insertSort(data, mid + 1, r - mid); CR3<9=Lv>
ErmlM#u
for (i = l; i <= mid; i++) { ?T]3I.3 2^
temp = data; ;cKN5#7
} M,nX@8 _h
for (j = 1; j <= r - mid; j++) { L|O[u^
temp[r - j + 1] = data[j + mid]; %<c2jvn+k
} EY'kIVk
int a = temp[l]; L[;U Z)V@
int b = temp[r]; x-J.*X/aB
for (i = l, j = r, k = l; k <= r; k++) { l12Pj02w
if (a < b) { }o^VEJc`O
data[k] = temp[i++]; =GH>-*qp
a = temp; TKJs'%Q7F6
} else { W.u+R?a=
data[k] = temp[j--]; IkW8$>
b = temp[j]; ;\1/4;m
} uW4)DT9[5
} REqQJ7a/
} 8x":7 yV&
oN3DM;
/** !' ;1;k);
* @param data |7XPu
* @param l (@wgNA-P
* @param i *nZe|)m
*/ MPaF
private void insertSort(int[] data, int start, int len) { VS.~gHx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (.r9bl
} %0-fn'
} haTmfh_|
} ">zK1t5=
} s0EF{2<F
*GUQz
堆排序： al#BfcZW
MK1V1F`
package org.rut.util.algorithm.support; R*S9[fqC[
4\?z^^
import org.rut.util.algorithm.SortUtil; hD)'bd
{Sl#z}@s
/** ,$4f#)
* @author treeroot %X|fp{C
* @since 2006-2-2 2lb HUK
* @version 1.0 &7-ENg9 [
*/ Dt#( fuk#
public class HeapSort implements SortUtil.Sort{ 3rdrNc
^$>Q6.x?*)
/* (non-Javadoc) Qk5pRoL_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;*J_V/&?
*/ }Mv$Up
public void sort(int[] data) { s:O8dL /
MaxHeap h=new MaxHeap(); 0gevn
h.init(data); L<QjkFj
for(int i=0;i h.remove(); }F B]LLi
System.arraycopy(h.queue,1,data,0,data.length); ]?un'$%e
} )G+D6s23
J]AkWEiCJ
private static class MaxHeap{ V7S[rI<<r
f*%Y]XL;%
void init(int[] data){ +hZ{/
this.queue=new int[data.length+1]; Kb$6a'u7
for(int i=0;i queue[++size]=data; 6?`3zdOeO
fixUp(size); ,%^qzoZnT
} 7QXp\<7
} 8MZ:=
}+/F?_I= %
private int size=0; C#l9MxZE
\D5_g8m:
private int[] queue; #qcF2&a%
SB)Hz8<
public int get() { e~1$x`DH
return queue[1]; qX"m"ko
} ).i :C(|
gw^X-
public void remove() { m1#,B<6
SortUtil.swap(queue,1,size--); |h 3`z
fixDown(1); IKFNu9*"h
} [+3~wpU(p
file://fixdown 1,Uf-i
private void fixDown(int k) { $=ua$R4Z+
int j; &eIwlynm
while ((j = k << 1) <= size) { d-ML[^G
if (j < size %26amp;%26amp; queue[j] j++; $.Qu55=z<
if (queue[k]>queue[j]) file://不用交换 `]$H\gNI[8
break; btDPP k'
SortUtil.swap(queue,j,k); sOBuJx${m
k = j; KrqO7
} s g6e% 5
} eCy]ugsi%
private void fixUp(int k) { 15Vo_ wD<y
while (k > 1) { )%Lgo${[;
int j = k >> 1; K-6+fgeB
if (queue[j]>queue[k]) PESJ7/^E
break; "*oN~&flc
SortUtil.swap(queue,j,k); x)prI6YMv\
k = j; |W;EPQ+<
} Q^|aix~ K
} W't.e0L<6
QV*W#K\7q
} +l@+e_>
_Z3_I_lW
} 39Zs
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SortUtil： x5YHmvy/l
n,o;:c
package org.rut.util.algorithm; /GU%{nT
ghVxcK
import org.rut.util.algorithm.support.BubbleSort; 2\L}Ka|v
import org.rut.util.algorithm.support.HeapSort; V1>>]]PS
import org.rut.util.algorithm.support.ImprovedMergeSort; j.vBld
import org.rut.util.algorithm.support.ImprovedQuickSort; xyaU!E*
import org.rut.util.algorithm.support.InsertSort; }c;h:CE#
import org.rut.util.algorithm.support.MergeSort; OJ4-p&1
import org.rut.util.algorithm.support.QuickSort; ~glFB`?[
import org.rut.util.algorithm.support.SelectionSort; BGZvgMxLJ
import org.rut.util.algorithm.support.ShellSort; -"X} )N2
n 7m!
/** VsR`y]"g
* @author treeroot pTzfc`~xv
* @since 2006-2-2 -nKBSls
* @version 1.0 u9^R ?y
*/ K)n0?Q_>
public class SortUtil { #^;^_
public final static int INSERT = 1; hXM2B2[
public final static int BUBBLE = 2; :>GT<PPD;
public final static int SELECTION = 3; _=oNQ
public final static int SHELL = 4; {1j[RE
public final static int QUICK = 5; &m>txzo
public final static int IMPROVED_QUICK = 6; H=k`7YN
public final static int MERGE = 7; dL!K''24{
public final static int IMPROVED_MERGE = 8; 26\*x
public final static int HEAP = 9; DU: sQS4
Zjh9jvsW
public static void sort(int[] data) { DozC>
sort(data, IMPROVED_QUICK); L7&|
} BlvNBB1^
private static String[] name={ dk9nhS+faJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C},$(2>0+
}; J"dp?i
@5-+>\Hd^t
private static Sort[] impl=new Sort[]{ v__;oqN0
new InsertSort(), Q`X5W
new BubbleSort(), |;B 'C#
new SelectionSort(), tHo0q<.oX
new ShellSort(), _*w}"\4_
new QuickSort(), b1{XGK'
new ImprovedQuickSort(), lt&30nf=
new MergeSort(), f3]u-e'b
new ImprovedMergeSort(), k^PqB+P!
new HeapSort() vDAv/l9
}; SY}iU@xo
,As78^E{
public static String toString(int algorithm){ ]m(5>h#
return name[algorithm-1]; oFeflcSz
} e[@ ^UY
~-w
public static void sort(int[] data, int algorithm) { !OJSQB,
impl[algorithm-1].sort(data); K!9rH>`\
} Z0e+CEzq
*X^__PS]
public static interface Sort { %KmB>9
public void sort(int[] data); |k4ZTr]?
} zA/W+j$:
Q nqU!6k@
public static void swap(int[] data, int i, int j) { #dGg !D
int temp = data; r4xq%hy
data = data[j]; s `r tr
data[j] = temp; &xqe8!FeA
} #:68}f"$
} Vy:ER