[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; B@YyQ'
} R<ND=[}s
int i1=l; WG71k8af
int i2=mid+1; Ter:sge7
for(int cur=l;cur<=r;cur++){ "6ECgyD+E!
if(i1==mid+1) qml2XJ>
data[cur]=temp[i2++]; T'-FV
else if(i2>r) 1nknSw#
data[cur]=temp[i1++]; :G w~7v_
else if(temp[i1] data[cur]=temp[i1++]; d5 Edu44
else 5+Mdh`
data[cur]=temp[i2++]; E\8
} BKa- k!
} LA3<=R]
smY$-v)@
} qm*}U3K
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改进后的归并排序: s?Uh|BfB
S{Hx]\
package org.rut.util.algorithm.support; M]v=-
s pLZ2]A
import org.rut.util.algorithm.SortUtil; HS>f1!
f;SC{2f
/** X6+qpp
* @author treeroot M@1r:4CoKH
* @since 2006-2-2 k^ F@X
* @version 1.0 sd#|3
*/ [L$9p@I
public class ImprovedMergeSort implements SortUtil.Sort { "&Dx=Yf
KfCoe[Vv
private static final int THRESHOLD = 10; $2DuB
FSuAjBl0-
/* )QagS.L{z
* (non-Javadoc) m4E)qCvy
* gnp~OVDqfL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8;Fn7k_Uf
*/ %Pqk63QF
public void sort(int[] data) { l%z<(L5
int[] temp=new int[data.length]; juF{}J2
mergeSort(data,temp,0,data.length-1); 4F>Urh+
} Z|9u]xL
am_gH
private void mergeSort(int[] data, int[] temp, int l, int r) { y %$O-q
int i, j, k; X2mREt9
int mid = (l + r) / 2; }0`nvAf
if (l == r) wfvU0]wk}
return; [ao U5;7
if ((mid - l) >= THRESHOLD) O|A_PyW
mergeSort(data, temp, l, mid); ;R=.iOn
else +(D$9{y
insertSort(data, l, mid - l + 1); "1q>At
if ((r - mid) > THRESHOLD) $P7iRM]
mergeSort(data, temp, mid + 1, r); j6~nE'sQ
else X7UuwIIP
insertSort(data, mid + 1, r - mid); ;g_> ;tR/
G!8Z~CPF
for (i = l; i <= mid; i++) { v1k)hFjPK
temp = data; 5m=I*.qE
} MC((M,3L
for (j = 1; j <= r - mid; j++) { K'iIJA*Sn
temp[r - j + 1] = data[j + mid]; #eU.p&Zc
} uV-'~8
int a = temp[l]; jJ4qR:]
int b = temp[r]; g>d;|sK
for (i = l, j = r, k = l; k <= r; k++) { I]Tsz'T!9
if (a < b) { ?.c;oS|
data[k] = temp[i++]; ^[Ua46/"m
a = temp; )yY6rI;:
} else { b5IA"w
data[k] = temp[j--]; =&0wr6
b = temp[j]; Bx"7%[
} t#nn@Yf
} LNl#h
} i`/+,<
b5m=7;u*h
/** MC0TaP
* @param data #zrTY9m7
* @param l e}@)z3Q<l
* @param i @cRZk`|1n
*/ wi8Yl1p]!z
private void insertSort(int[] data, int start, int len) { }~h'FHCC+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); IvpcSam'
} ;Zj]~|
} +9O5KI?P
} { 74mf'IW
} 3ZTE<zRQ
%dErnc$
堆排序： Iu~\L0R427
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package org.rut.util.algorithm.support; Gc.P,K/hr
2#X4G~>#h
import org.rut.util.algorithm.SortUtil; (3[z%@I
>vrxP8_
/** /2{5;
* @author treeroot % |q0-x
* @since 2006-2-2 %8aC1x
* @version 1.0 s{ V*1$e~
*/ VN4yn| f/
public class HeapSort implements SortUtil.Sort{ C=uZ1xg*,
&Gm$:T'~
/* (non-Javadoc) (nW67YTr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D2YZ9e
*/ B:"THN^
public void sort(int[] data) { jUj<~:Q}3o
MaxHeap h=new MaxHeap(); ~,D@8tv
h.init(data); uUE9g
for(int i=0;i h.remove(); wn Y$fT9
System.arraycopy(h.queue,1,data,0,data.length); 6#}93Dgv4
} RjJU4q
yix'rA-T
private static class MaxHeap{ JO&JP3N1
a/~aFmu6b
void init(int[] data){ nqR?l4 DX
this.queue=new int[data.length+1]; >}~#>Ru
for(int i=0;i queue[++size]=data; ]DFXPV
fixUp(size); %I!:ITa
} z sQo$p
} h:XzUxL\
sDqe(x}a
private int size=0; _FbC{yI8;
E{=2\Wkcp
private int[] queue; _ 7oV<
fsO9EEn7X
public int get() { *fO3]+)d+
return queue[1]; 3>zN/f
} |( (zTf
,~ ?'Ef80
public void remove() { u{&B^s)k.
SortUtil.swap(queue,1,size--); AJt!!crs
fixDown(1); LL!.c
} M_B:{%4
file://fixdown HQ!Xj.y
private void fixDown(int k) { ->-*]-fv[L
int j; M|T4~Q U&
while ((j = k << 1) <= size) { LiDvaF:@L!
if (j < size %26amp;%26amp; queue[j] j++; ArLvz5WV
if (queue[k]>queue[j]) file://不用交换 K*K1(_x=
break; >,C4rC+:XN
SortUtil.swap(queue,j,k); hovGQHg
k = j; *, Ld/O;s
} .=9s1~]
} 2.}R
private void fixUp(int k) { y;" n9
while (k > 1) { O|kKwadC
int j = k >> 1; 3HG;!D~m;
if (queue[j]>queue[k]) fLN!EDq
break; >: 0tA{bV
SortUtil.swap(queue,j,k); 4kp im
k = j; ,zcQS-e2
} KYJ1}5n
} nR \'[~+
Tm+;0
} ;SwC&.I
E ?2O(
} rt]S\
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SortUtil： ,reJ(s
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package org.rut.util.algorithm; :L?_Y/K
FD7H@L5
import org.rut.util.algorithm.support.BubbleSort; }pNX@C#De
import org.rut.util.algorithm.support.HeapSort; HgBJf~q~U
import org.rut.util.algorithm.support.ImprovedMergeSort; n[xkSF^)
import org.rut.util.algorithm.support.ImprovedQuickSort; $BN15x0/:~
import org.rut.util.algorithm.support.InsertSort; +\`vq"e
import org.rut.util.algorithm.support.MergeSort; W@L3+4
import org.rut.util.algorithm.support.QuickSort; [um&X=1V8
import org.rut.util.algorithm.support.SelectionSort; }m]q}r
import org.rut.util.algorithm.support.ShellSort; T*2C_oW
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/** /z."l!u6
* @author treeroot 7D"%%|: h
* @since 2006-2-2 ul7o%Hs
* @version 1.0 3EFD%9n
*/ 0V,Nv9!S
public class SortUtil { khd5 Cf[
public final static int INSERT = 1; 6y+b5-{'
public final static int BUBBLE = 2; GrJ#.
public final static int SELECTION = 3; UgHf*m
public final static int SHELL = 4; Gu(lI ~
public final static int QUICK = 5; O0l^*nZ46t
public final static int IMPROVED_QUICK = 6; e&Y0}oY
public final static int MERGE = 7; 'E;W
public final static int IMPROVED_MERGE = 8; s}x>J8hK
public final static int HEAP = 9; l4'~}nn(Y
>}+Q:iNQ)2
public static void sort(int[] data) { a^nAZ
sort(data, IMPROVED_QUICK); uq7T{7~<
} (ClhbfzD
private static String[] name={ V*n==Nb5L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5vp|?-\h>
}; A;K(J4y*
g9tu%cIkR
private static Sort[] impl=new Sort[]{ Eyh|a.)-
new InsertSort(), 8m=Z|"H@
new BubbleSort(), u4'z$>B
new SelectionSort(), O??vm?eo
new ShellSort(), 3*S[eqMJc
new QuickSort(), @Z(rgF{{
new ImprovedQuickSort(), =iz,S:[
new MergeSort(), .:1qK<vz
new ImprovedMergeSort(), uZjI?Z.A
new HeapSort() a_T,t'6
}; vS;'}N
VC&c)X
public static String toString(int algorithm){ Rc$h{0K8
return name[algorithm-1]; {XY3Xo
} )na&"bJ
gy_$#e
public static void sort(int[] data, int algorithm) { _+QwREP
impl[algorithm-1].sort(data); 97~K!'/^+y
} Rq)BssdF
*_hLD5K!
public static interface Sort { J%v5d*$.
public void sort(int[] data); GG-[`!>.pw
} O&?.&h
W|c.l{A5Q
public static void swap(int[] data, int i, int j) { M-9gD[m
int temp = data; 6vz1*\:H~
data = data[j]; Q|hm1q
data[j] = temp; -e>|kPfv!
} Agy <j
} )^;DGzG