[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; ~xS@]3n=
} jCzGus!rM
int i1=l; ZA0i)(j*Mn
int i2=mid+1; aH%ZetLNJ
for(int cur=l;cur<=r;cur++){ E;6~RM:
if(i1==mid+1) uie~'K\y
data[cur]=temp[i2++]; [UMLx
else if(i2>r) ?VB#GJ0M9
data[cur]=temp[i1++]; eGLO!DdxZ
else if(temp[i1] data[cur]=temp[i1++]; rO0ZtC{K
else 'WK;$XQ
data[cur]=temp[i2++]; Bc@30KiQ^
} =H[\%O~?b
} #(6) ^ (
Z<;U:aH?}
} [-\({<t3x
25d\!3#E
改进后的归并排序: *B1x`=
"K,bH
package org.rut.util.algorithm.support; UP\C"\
YMT8p\#rp
import org.rut.util.algorithm.SortUtil; 0<g<GQ(E
& g:%*>7P
/** U^[<
* @author treeroot %y>+1hakkX
* @since 2006-2-2 =_[2n?9y
* @version 1.0 ~LbS~_\C=
*/ O#Z/+\U
public class ImprovedMergeSort implements SortUtil.Sort { -I ?z-?<D
Y]N~vD
private static final int THRESHOLD = 10; +0J@y1
|xh&p(
/* Z==!C=SBv
* (non-Javadoc) .U9R>#
* M#xQW`-`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )u;JwFstX
*/ .d~\Ysve
public void sort(int[] data) { )GVBE%!WEd
int[] temp=new int[data.length]; uFZ~
mergeSort(data,temp,0,data.length-1); 4qt+uNe!
} IZ*}idlkn/
@lS==O-`f
private void mergeSort(int[] data, int[] temp, int l, int r) { # :#M{1I
int i, j, k; 7R,qDp S
int mid = (l + r) / 2; OUzR@$
if (l == r) R:~(Z?
return; thuRNYv<
if ((mid - l) >= THRESHOLD) &|b4\uj9
mergeSort(data, temp, l, mid); Q&xjF@I
else zsDocR
insertSort(data, l, mid - l + 1); daslaa_A
if ((r - mid) > THRESHOLD) ca(U!T68
mergeSort(data, temp, mid + 1, r); `?|Rc
else l-}KmZ]
insertSort(data, mid + 1, r - mid); #--olEj!
O|I+],
for (i = l; i <= mid; i++) { $Jp~\_X
temp = data; "(,2L,Zh
} f2yq8/J8.
for (j = 1; j <= r - mid; j++) { 9_ZBV{
temp[r - j + 1] = data[j + mid]; yHNuU)Ft
} ,}0$Tv\1
int a = temp[l]; ]]TqP{H
int b = temp[r]; xvmt.>f
for (i = l, j = r, k = l; k <= r; k++) { R,Fgl2
if (a < b) { Vr/Bu4V"
data[k] = temp[i++]; gO='A(Y
a = temp; WULAty
} else { =A@>I0(7
data[k] = temp[j--]; qZ*f%L(
b = temp[j]; ~U$":~H[
} )JhT1j Qc
} -#.< 12M
} d yh<pX/$
o5swH6Y.)J
/** 7?J3ci\
* @param data byGn,m
* @param l qsI^oBD"
* @param i QXVC\@
*/ nBz`q+V
private void insertSort(int[] data, int start, int len) { +j{Y,t{4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); eY,O@'"8`
} |0sPka/u16
} FI"HJwAs
} L0Y0&;y|R
} =gjDCx$|
53Yxz3v
堆排序： I[0!SIqY
M:|8]y@
package org.rut.util.algorithm.support; ez\eOH6
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import org.rut.util.algorithm.SortUtil; ~y /!fnv
A]o4Mf0>I
/** Bz /@c)
* @author treeroot 1%~[rnQ
* @since 2006-2-2 j6S"UwJjp
* @version 1.0 q0&$7GH4
*/ G:IP? z]
public class HeapSort implements SortUtil.Sort{ j1*f]va
BT,b-= ;J-
/* (non-Javadoc) \X|sU:g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yNCEz/4
*/ Eectxyr?;N
public void sort(int[] data) { vXv;1T
MaxHeap h=new MaxHeap(); PFrfd_s{>\
h.init(data); ]$A(9Pn"
for(int i=0;i h.remove(); ~#PLAP3-
System.arraycopy(h.queue,1,data,0,data.length); kn"q:aD
} !'G~k+
"Sridh?
private static class MaxHeap{ $,fy$ Qk,S
Xg7|JS!
void init(int[] data){ 6N~q`;p0
this.queue=new int[data.length+1]; AjkW0FB:1
for(int i=0;i queue[++size]=data; V'DA[{\*
fixUp(size); UZ2TqR
} MHi8E9_O
} )Si2u5
YKZa$@fA?
private int size=0; @1-F^G%p8
z6*<V5<7
private int[] queue; 3jZ6kfj
Y32 "N[yw
public int get() { R=]d%L8
return queue[1]; xQ4%e[/
} Kibr ]w
Hfym30
public void remove() { N&,]^>^u
SortUtil.swap(queue,1,size--); fv!?Ga(
fixDown(1); -/P\"c
} pH@]Y+W
file://fixdown SaOYu &>
private void fixDown(int k) { \%0n}.A
int j; Gl}Qxv#$
while ((j = k << 1) <= size) { j%IF2p2
if (j < size %26amp;%26amp; queue[j] j++; Oy57$
if (queue[k]>queue[j]) file://不用交换 CGbwmPx
break; L|hx arJ
SortUtil.swap(queue,j,k); wkUlrL/~
k = j; LR(-<"
} 4_/?:$KO
} #V,R >0"
private void fixUp(int k) { K/=|8+IDL
while (k > 1) { k8AW6oO/i
int j = k >> 1; n'1'!J;Q
if (queue[j]>queue[k]) PcT?<HU
break; %]2,&
SortUtil.swap(queue,j,k); fHRMu:q
k = j; {)8>jxQN
} d5`3wd]]'v
} lQ'GX9hN@
'' O7=\
} dG7OqA:9
g%[c<l9
} p5r]J+1
06q(aI^Ch@
SortUtil： -G7TEq)
2-N 'ya
package org.rut.util.algorithm; 4JGtI*%5lq
/U&Opo {aO
import org.rut.util.algorithm.support.BubbleSort; Z;/$niY
import org.rut.util.algorithm.support.HeapSort; "pP^*9FrA
import org.rut.util.algorithm.support.ImprovedMergeSort; ~`M\Ir
import org.rut.util.algorithm.support.ImprovedQuickSort; 0'YG6(h
import org.rut.util.algorithm.support.InsertSort; kE9esC3
import org.rut.util.algorithm.support.MergeSort; !K f#@0E..
import org.rut.util.algorithm.support.QuickSort; aFz5leD
import org.rut.util.algorithm.support.SelectionSort; Gs+3e8
import org.rut.util.algorithm.support.ShellSort; Eow_&#WW;P
l vMlL5t
/** hCjR&ZA
* @author treeroot ^.dsW0"0
* @since 2006-2-2 &|3 $!S
* @version 1.0 uN([*'0Cg
*/ ZOCDA2e(j
public class SortUtil { }XO K,Hw
public final static int INSERT = 1; 0Z[oKXm1p
public final static int BUBBLE = 2; ]vWKR."4
public final static int SELECTION = 3; (8.Z..PH
public final static int SHELL = 4; ?=m?jNa;nC
public final static int QUICK = 5; tg]x0#@s
public final static int IMPROVED_QUICK = 6; 26&'X+n&
public final static int MERGE = 7; &0 >Loja`^
public final static int IMPROVED_MERGE = 8; ;s`sn$@
public final static int HEAP = 9; ks$JP6
u/cg|]x&T
public static void sort(int[] data) { a,2'+Tlo
sort(data, IMPROVED_QUICK); 8V^oP]Y
} =6"2UC&
private static String[] name={ X/iT)R]b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" EQ'V{PIfj
}; ?7<JQh)"e
=R*qP;#
private static Sort[] impl=new Sort[]{ 79`AM X[b
new InsertSort(), \b%kf99
new BubbleSort(), ^6_e=jIN
new SelectionSort(), UfN&v >8f
new ShellSort(), KMI_zhyB
new QuickSort(), 0"CG7Vg,zh
new ImprovedQuickSort(), LaQ-=;(`
new MergeSort(), yKYTi3_(
new ImprovedMergeSort(), Hemq+]6^
new HeapSort() -FU}pz/
}; f7m%|v!
B!vmQR*1
public static String toString(int algorithm){ IiY/(N+J
return name[algorithm-1]; dZi"$ g
} 0TQ$C-%
(M*FIX
public static void sort(int[] data, int algorithm) { U}[I
impl[algorithm-1].sort(data); >}+/{(K"E|
} MyT q
ZosP(Tdq
public static interface Sort { j#cYS*^H
public void sort(int[] data); N[s}qmPha
} -$\+' \
b )B? F
public static void swap(int[] data, int i, int j) { {q"OM*L(
int temp = data; zT!drq:x
data = data[j]; W[Ls|<Q
data[j] = temp; {phNds%
} &*+'>UEe5
} `DV.+>O-1