[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; P$*Ngt
} u-mD"
int i1=l; vP? T
int i2=mid+1; ]H\tz@ &
for(int cur=l;cur<=r;cur++){ iJmzVR+
if(i1==mid+1) 5wl;fL~e
data[cur]=temp[i2++]; B##X94aTT
else if(i2>r) #V#!@@c;?
data[cur]=temp[i1++]; 've[Mx
else if(temp[i1] data[cur]=temp[i1++]; #reW)P>
else ?N!kYTR%}
data[cur]=temp[i2++]; LGX+_"
} OIjSH~a.
} zZ<*
Np ru
} X|ZAC!J5>
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改进后的归并排序: J1~E*t^
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package org.rut.util.algorithm.support; wEJzLFCn
BNI)y@E^X
import org.rut.util.algorithm.SortUtil; jiLJiYMg
CXyb8z4/+
/** 1KBGML-K3
* @author treeroot 7\R"RH-
* @since 2006-2-2 w1aoEo"S
* @version 1.0 {>~9?Xwh
*/ CgYX^h?Y9
public class ImprovedMergeSort implements SortUtil.Sort { /!MKijI
g-"GZi
private static final int THRESHOLD = 10; .uxM&|0H
['sNk[-C
/* }<l:~-y|
* (non-Javadoc) 0(:SEiz6s
* FoH1O+e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mZPvG
*/ IAq o(Qm
public void sort(int[] data) { M6Np!0G
int[] temp=new int[data.length]; nbf/WOCk
mergeSort(data,temp,0,data.length-1); iemp%~UZ
} /wt7KL-I
.Y^cs+-o
private void mergeSort(int[] data, int[] temp, int l, int r) { iR88L&U>
int i, j, k; .jk A'i@
int mid = (l + r) / 2; kw]?/s`
if (l == r) #d-zH:uq
return; HTGLFY(&
if ((mid - l) >= THRESHOLD) e6J^J&`|4
mergeSort(data, temp, l, mid); k,k>w#&
else P*~ vWYH9
insertSort(data, l, mid - l + 1); C1UU v=|
if ((r - mid) > THRESHOLD) $j<KXR
mergeSort(data, temp, mid + 1, r); yRXWd*9
else [Z#Sj=z
insertSort(data, mid + 1, r - mid); #9!7-!4pW
g<.Is V
for (i = l; i <= mid; i++) { pq&[cA_w
temp = data; c"Vp5lo0
} xz.Jmv
for (j = 1; j <= r - mid; j++) { -C3[:g
temp[r - j + 1] = data[j + mid]; HG?+b
} NlKVl~_ C
int a = temp[l]; PM#3N2?|E
int b = temp[r]; kROIVO1|`
for (i = l, j = r, k = l; k <= r; k++) { (tg9"C
if (a < b) { Ddpcov
data[k] = temp[i++]; 2b^Fz0 w4
a = temp; \U>&W
} else { 2Ki_d
data[k] = temp[j--]; S)j(%g
b = temp[j]; 09jE7g @X}
} Y<irNp9
} CW?Z\
} K.Y`/<
/(51\RYkir
/** ?Y,^Moc:
* @param data OoH-E.lp
* @param l H${LF.8
* @param i S_Wq`I@b
*/ p^<(.+P4
private void insertSort(int[] data, int start, int len) { $6pLsX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f'@ L|&w
} rVoV@,P
} v x/YWZ
} _avf%OS
} xn503,5G*7
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堆排序： ~h;
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package org.rut.util.algorithm.support; "IT7.!=@9
6Jb0MX"AVr
import org.rut.util.algorithm.SortUtil; ka\{?:r,8
N\g=9o|Q
/** rD SYR\cg
* @author treeroot *S:~U
* @since 2006-2-2 <a @7's
* @version 1.0 Dn 0L%?_
*/ Z}uY%]
public class HeapSort implements SortUtil.Sort{ 7`;sX?R
"N6HX*
/* (non-Javadoc) ge GhM>G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9AX}V6\+
*/ @GQfBV|3
public void sort(int[] data) { :1j8!R5
MaxHeap h=new MaxHeap(); zH}3J}
h.init(data); hDJG.,r
for(int i=0;i h.remove(); P7XZ|Td4*
System.arraycopy(h.queue,1,data,0,data.length); ra T9
} yT@Aj;X0v
JpC=ACF
private static class MaxHeap{ d,98W=7
{jB>]7
void init(int[] data){ nWIZ0Nde'
this.queue=new int[data.length+1]; /h+ W L
for(int i=0;i queue[++size]=data; |du%c`wl
fixUp(size); 3u/JcU-<
} $e7%>*?m
} _) x{TnK
P|$n
private int size=0; U`qC.s(L
g&xj(SMj-$
private int[] queue; Intuda7e1
%%s)D4sW
public int get() { h2Nt@
return queue[1]; y%i9 b&gDd
} rC^5Z
M0fN[!*z
public void remove() { qS/}aDk&
SortUtil.swap(queue,1,size--); ))|d~m
fixDown(1); SZ9Oz-?
} {kk%_q
file://fixdown N<rq}^qo
private void fixDown(int k) { -K=.A*}
int j; 9Q4{ cB
while ((j = k << 1) <= size) { K'Ywv@
if (j < size %26amp;%26amp; queue[j] j++; l2St)`K8
if (queue[k]>queue[j]) file://不用交换 -a)1L'R
break; )Ri!
SortUtil.swap(queue,j,k); ]{6/6jl
k = j; f%o[eW#
} 6U*CR=4
} D#&9zR86F
private void fixUp(int k) { U3a2wK
while (k > 1) { Xs052c|s
int j = k >> 1; K`Kv.4
if (queue[j]>queue[k]) aKriO
break; )hrsA&1w
SortUtil.swap(queue,j,k); M/p9 I gp
k = j; ,yGbMOV
} ~ps,U
} l|WFS
_,L_H[FN
} }( F:U#
p [C 9g
} *ai~!TR
u @Ze@N%
SortUtil： $vu*# .w
q* R}yt5
package org.rut.util.algorithm; ; R+>}6
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import org.rut.util.algorithm.support.BubbleSort; <(jk}wa<
import org.rut.util.algorithm.support.HeapSort; ck{S
import org.rut.util.algorithm.support.ImprovedMergeSort; v-z%3x.f
import org.rut.util.algorithm.support.ImprovedQuickSort; EN2t}rua
import org.rut.util.algorithm.support.InsertSort; Pjs=n7
import org.rut.util.algorithm.support.MergeSort; JI.=y5I
import org.rut.util.algorithm.support.QuickSort; b M1\z
import org.rut.util.algorithm.support.SelectionSort; F9o7=5WAb
import org.rut.util.algorithm.support.ShellSort; C~pas~
bIiuna\
/** Q[#}Oh6$
* @author treeroot \:J=tAC
* @since 2006-2-2 -rsbSt ?_
* @version 1.0 P$U"y/
*/ ;|vP|Xi
public class SortUtil { &'>m;W
public final static int INSERT = 1; @G2# Z
public final static int BUBBLE = 2; xZ`z+)
public final static int SELECTION = 3; b~vV++ou_
public final static int SHELL = 4; pZ>yBY?R8>
public final static int QUICK = 5; .3C::~:
public final static int IMPROVED_QUICK = 6; \+V"JIStUj
public final static int MERGE = 7; !vf:mMo
public final static int IMPROVED_MERGE = 8; CKn2ZL
public final static int HEAP = 9; eI$V2
0fewMS*
public static void sort(int[] data) { BjfVNF;hk:
sort(data, IMPROVED_QUICK); wU+r]SK@
} ~".@mubt1$
private static String[] name={ cRf F!EV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" CImp,k0
}; %FYhq:j
b$DiDm
private static Sort[] impl=new Sort[]{ o>8~rtl
new InsertSort(), CnB[ImMs(A
new BubbleSort(), eI:[o
new SelectionSort(), 1M&Lb.J6
new ShellSort(), -kk7y
new QuickSort(), l}/_(*
new ImprovedQuickSort(), L4Jm8sy{
new MergeSort(), \B4H0f
new ImprovedMergeSort(), "6'",
new HeapSort() @6G)(NGD
}; M v(Pp
tG$O[f@U6
public static String toString(int algorithm){ 7.Y;nem:(
return name[algorithm-1]; %8n<#0v-|4
} gttsxOgktH
+H3~Infr4f
public static void sort(int[] data, int algorithm) { Cw(e7K7&
impl[algorithm-1].sort(data); MOQ6&C`7q
} q?7''xk7
VF2,(f-*
public static interface Sort { .9vS4C
public void sort(int[] data); 67rY+u%
} "v:k5a(
U*a#{C7"
public static void swap(int[] data, int i, int j) { \]<R`YMV
int temp = data; <)TIj6
data = data[j]; +=J$:/&U
data[j] = temp; x4v:67_^
} twr{jdY9
} X&zGgP/