[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; U LS>v
} M_!]9#:K7
int i1=l; uNI&U7_"
int i2=mid+1; `]65&hWZL
for(int cur=l;cur<=r;cur++){ koT3~FK
if(i1==mid+1) T"P}`mT
data[cur]=temp[i2++]; vk|f"I
else if(i2>r) s 4rva G@a
data[cur]=temp[i1++]; O`CZwXD
else if(temp[i1] data[cur]=temp[i1++]; rL\}>VC)
else EPW4 h/I
data[cur]=temp[i2++]; J t.<Z&
} [GbrKq(
} GI{EP&C
~Q=;L>Qd
} 5$+7Q$Gw
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改进后的归并排序: (su7*$wV
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package org.rut.util.algorithm.support; 28v^j*=* \
W\j'8^kI9
import org.rut.util.algorithm.SortUtil; qy?$t:*pp
E[t[R<v,P!
/** .4ww5k>
* @author treeroot <`-sS]=d}
* @since 2006-2-2 }{+?>!qDt
* @version 1.0 #O_%!7M{4
*/ a 7v^o`
public class ImprovedMergeSort implements SortUtil.Sort { #<Y3*^~5d
;^s|n)F#c
private static final int THRESHOLD = 10; i<m) s$u
;fV"5H)U\
/* sh,4n{+
* (non-Javadoc) \6GNKeN
* kt`ln
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U}HSL5v
*/ fph+05.%
public void sort(int[] data) { 512p\x@
int[] temp=new int[data.length]; msw'n
mergeSort(data,temp,0,data.length-1); [,st: Y
} 5fs,UH
cl#XiyK>
private void mergeSort(int[] data, int[] temp, int l, int r) { ~:,}?9
int i, j, k; Uth+4Aq
int mid = (l + r) / 2; vC&0UNe$
if (l == r) XU<owk
return; 5o{U$
if ((mid - l) >= THRESHOLD) 3qGz(6w6E
mergeSort(data, temp, l, mid); IW@xT@
else >&>EjK4?
insertSort(data, l, mid - l + 1); r]}6iF.
if ((r - mid) > THRESHOLD) x]Nx,tt
mergeSort(data, temp, mid + 1, r); {8":cn j
else gs0jwI
insertSort(data, mid + 1, r - mid); hG`@#9|f
_)LXD,LA
for (i = l; i <= mid; i++) { M-;MwLx
temp = data; LIJ#nb
} D\ZH1C!d
for (j = 1; j <= r - mid; j++) { |61ns6i!
temp[r - j + 1] = data[j + mid]; l`6.(6
} 2N(Z^
int a = temp[l]; hX,RuI
int b = temp[r]; 08AD~^^
for (i = l, j = r, k = l; k <= r; k++) { Q6 o1^s
if (a < b) { ]ZR` 6|"VO
data[k] = temp[i++]; H#X*OJ
a = temp; VNz?e&>
} else { Y$,++wx
data[k] = temp[j--]; %c$|.TkX
b = temp[j]; s 7%iuP
} 9;n*u9<
} S,|ZCl>+
} F&CvqPI
L|D9+u L
/** (,mV6U%
* @param data g;q.vHvsc"
* @param l c|'$3dB*
* @param i "Ar|i8^G3
*/ 5D-as9k*
private void insertSort(int[] data, int start, int len) { x~m$(LT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dA2@PKK
} y_Gs_xg
} A#Ga!a
} mJ[_q>
} $t6t 6<M)
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堆排序： ]m&Ss
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package org.rut.util.algorithm.support; &_@M 6[-
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import org.rut.util.algorithm.SortUtil; } nIYNeP?D
kE+fdr\ T
/** ]A\qI>,
* @author treeroot 5yJ~ q
* @since 2006-2-2 cN2Pl%7
* @version 1.0 QYj 4D
*/ 'm<L}d
public class HeapSort implements SortUtil.Sort{ c/F!cW{z^
.W9 *-
/* (non-Javadoc) %k"hzjXAw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9N2.:<so
*/ c8_,S[W
public void sort(int[] data) { 3qV~C{S
MaxHeap h=new MaxHeap(); MCXt,`}[
h.init(data); c>r~pY~$
for(int i=0;i h.remove(); 3fE0cVG*
System.arraycopy(h.queue,1,data,0,data.length); 9Ns%<FRO@
} \O~WMN
hr&UD|E=
private static class MaxHeap{ p2O[r
ljg6uz1v%
void init(int[] data){ n(n7"+B
this.queue=new int[data.length+1]; !af;5F
for(int i=0;i queue[++size]=data; 8@6*d.+e
fixUp(size); ]g%HU%R-m
} wk=s3^
} A-^B?E
e-xT.RnQ
private int size=0; a@? Bv
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private int[] queue; R&'Mze fb
e9CvdR
public int get() { B>"-8#B[4
return queue[1]; nAsc^Yh
} p-z!i+
'1G0YfG}n
public void remove() { D [v225
SortUtil.swap(queue,1,size--); gaU^l73,C
fixDown(1); JmBMc}54
} CWD $\KG
file://fixdown D{+D.4\
private void fixDown(int k) { cvpZF5mL]U
int j; #m'+1 s L
while ((j = k << 1) <= size) { "/hLZl
if (j < size %26amp;%26amp; queue[j] j++; +~;#!I@Di
if (queue[k]>queue[j]) file://不用交换 n*~#]%4
break; mm |*
SortUtil.swap(queue,j,k); a^&RV5o
k = j; nF 'U*
} tU8aPiUl
} 6fT^t!<i
private void fixUp(int k) { "?Jf#
while (k > 1) { 2%pe.stQ
int j = k >> 1; En8L1$_
if (queue[j]>queue[k]) *m6*sIR
break; (g tOYEqx
SortUtil.swap(queue,j,k); 6x@]b>W
k = j; woU3WS0
} u/`x@u
} HDhG1B"NL
7. eiM!7g
} sgB|2cj;j
kChCo0Q>1
} z)*\njYe
DH4|lb}
SortUtil： A+hT2Ew@t}
9lX+?m~ ~
package org.rut.util.algorithm; 3cFvS[JG
w< |Lx#L}
import org.rut.util.algorithm.support.BubbleSort; i32S(3se
import org.rut.util.algorithm.support.HeapSort; NV3oJ0f&2
import org.rut.util.algorithm.support.ImprovedMergeSort; 2\[ Q{T=Qe
import org.rut.util.algorithm.support.ImprovedQuickSort; dQAo~]B
import org.rut.util.algorithm.support.InsertSort; pf_`{2.\uO
import org.rut.util.algorithm.support.MergeSort; z|N*Gs>,
import org.rut.util.algorithm.support.QuickSort; S^@#%>
import org.rut.util.algorithm.support.SelectionSort; \H/}|^+@
import org.rut.util.algorithm.support.ShellSort; l37l| xp~
bj+foNvu\
/** #U/L8
* @author treeroot zXeBUbVi
* @since 2006-2-2 Eqt>_n8
* @version 1.0 3;EBKGg|
*/ j(Tk6S
public class SortUtil { `AELe_
public final static int INSERT = 1; hmtDw,j
public final static int BUBBLE = 2; 1.z !u%2
public final static int SELECTION = 3; (FNX>2Mv
public final static int SHELL = 4; <D(|}5qR
public final static int QUICK = 5; O>arCr=H
public final static int IMPROVED_QUICK = 6; 8)&J oPN
public final static int MERGE = 7; E&|EokSyN
public final static int IMPROVED_MERGE = 8; unkA%x{W;
public final static int HEAP = 9; }719_DF
4ak} "Z
public static void sort(int[] data) { U,^jN|v
sort(data, IMPROVED_QUICK); HlX2:\\
} HAMps[D[
private static String[] name={ Wi!$bL`l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ' ui`EL%
}; ~DK=&hCd!
;5}y7#4C
private static Sort[] impl=new Sort[]{ m:5bb3
new InsertSort(), K|{&SU_m
new BubbleSort(), DBzF\-
new SelectionSort(), Ya,(J0l
new ShellSort(), [r=U-
new QuickSort(), F[U0TP@&*
new ImprovedQuickSort(), >U')ICD~
new MergeSort(), gd\b]L?>O
new ImprovedMergeSort(), 'd|E>8fejG
new HeapSort() Dlu]4n[LB
}; 3O'X;s2\d
|0aGX]Y
public static String toString(int algorithm){ !fG`xZ~
return name[algorithm-1]; B?<Z(d7
} sh8(+hg
=J&aN1Hgt
public static void sort(int[] data, int algorithm) { I'16-
impl[algorithm-1].sort(data); JB\BP$ap
} {Ng HH]]O
JQWW's}
public static interface Sort { p4{3H+y
public void sort(int[] data); I45\xP4i
} U})Z4>[bvt
cK+y3`.0
public static void swap(int[] data, int i, int j) { &T/}|3S
int temp = data; 834dsl+U
data = data[j]; Yo#F;s7
data[j] = temp; /w*;|4~Bf
} -)ag9{*
} k34!*(`q