[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; ' S%?&4
} %M"rc4Xd
int i1=l; bgD4;)?5b
int i2=mid+1; [(Z{5gK
for(int cur=l;cur<=r;cur++){ T,z7U2O
if(i1==mid+1) cXM4+pa=%
data[cur]=temp[i2++]; .Jk[thyU
else if(i2>r) nf#;]FijB
data[cur]=temp[i1++]; 8nzDLFxp_
else if(temp[i1] data[cur]=temp[i1++]; m-V_J`9"
else >bQ'*!
data[cur]=temp[i2++]; a,<l_#'
} l":\@rm`
} M<h2+0(il
fmqHWu*wG
} z%ZAN-
TmI~P+5w
改进后的归并排序: \F`%vZrKR
VK>ZH^-
package org.rut.util.algorithm.support; QD6<sw@]P
*F:f\9
import org.rut.util.algorithm.SortUtil; #0OW0:Q
-U&k%X
/** p6)Jzh_/
* @author treeroot ]70V
* @since 2006-2-2 )4h4ql W
* @version 1.0 Jz"Yb
*/ Rr>nka)U
public class ImprovedMergeSort implements SortUtil.Sort { < cNJrer
L\)GPTo!x
private static final int THRESHOLD = 10; }Xa1K;KM{
h=<x%sie
/* ,x(?7ZW>
* (non-Javadoc) W(~7e?fO
* C/34K(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bU$4"_eA B
*/ eK8y'VY
public void sort(int[] data) { pZeJ$3@vk
int[] temp=new int[data.length]; 7T[Kjn^{Oj
mergeSort(data,temp,0,data.length-1); 2c)Ez?
} {=3&_/9s){
_x+)Tv
private void mergeSort(int[] data, int[] temp, int l, int r) { z89!\Q
int i, j, k; xWC*DKV
int mid = (l + r) / 2; `MD%VHQ9U
if (l == r) +!"GYPUXy
return; 0oT~6BGm
if ((mid - l) >= THRESHOLD) a!?JVhD&
mergeSort(data, temp, l, mid); 0Y|"Bo9k
else },eV?eGj
insertSort(data, l, mid - l + 1); t,D7X1W
if ((r - mid) > THRESHOLD) f2*e&+LjTP
mergeSort(data, temp, mid + 1, r); WdtZ{H
else $"e$#<g
insertSort(data, mid + 1, r - mid); 5t=7-
msf%i!
for (i = l; i <= mid; i++) { @$G{t^&os
temp = data; Ms>CO7Nvy
} 3UR'*5|'
for (j = 1; j <= r - mid; j++) { Bp:PAy
temp[r - j + 1] = data[j + mid]; $kAal26z
} ]LbFh5;s
int a = temp[l]; zG^|W8um_
int b = temp[r]; b8FSVV 7@
for (i = l, j = r, k = l; k <= r; k++) { }0okyGg>q
if (a < b) { lf`" (:./
data[k] = temp[i++]; obzdH:S
a = temp; 7)-uYi] dA
} else { IjaFNZZC!
data[k] = temp[j--]; |BA&ixHe~C
b = temp[j]; 5MX7V4ist
} x->H~/
} $^K12Wcp-
} `f)X!S2l
xR~9|H9a
/** _keI0ML-#
* @param data ^55q~DP}>
* @param l 9*Z!=Y#4,
* @param i f%[0}.wp
*/ 8T523VI
private void insertSort(int[] data, int start, int len) { Q8h0:Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q1Sr#h|
} /mK."5-cm
} .ri?p:a}w
} o;[cApiQ,2
} e'dx Y(
]H-5
堆排序： (F+]h]KSi
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package org.rut.util.algorithm.support; s=8$h:^9>
PP{s&(
import org.rut.util.algorithm.SortUtil; n_9Wrx328
5>\Lk>rI
/** !Bu=?gf
* @author treeroot O-uf^S4
* @since 2006-2-2 #&sw%CD
* @version 1.0 =Sjf-o1V
*/ -/ YY.F-
public class HeapSort implements SortUtil.Sort{ M`D`-vv
E0t%]?1
/* (non-Javadoc) UA3!28Y&E3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qZ<|A%WQ
*/ a/Ik^:>m
public void sort(int[] data) { Nm{J=`
MaxHeap h=new MaxHeap(); -Pp =)_O
h.init(data); :"Gd;~p.
for(int i=0;i h.remove(); Sp-M:,H3H
System.arraycopy(h.queue,1,data,0,data.length); *r/o \pyH
} .22}=z
'GF<_3I2l
private static class MaxHeap{ BK 9+fO
dF+R q|n{
void init(int[] data){ undH{w=
this.queue=new int[data.length+1]; YgLHp/
for(int i=0;i queue[++size]=data; =`+c}i?
fixUp(size); p?,T%G+gqO
} N"Cd{3
} WqRaD=R->;
LTZ~Id-)P
private int size=0; 0?w4
@$7l
private int[] queue; O_P8OA#|
fX/k;0l
public int get() { Ksb55cp`
return queue[1]; ;\54(x}|K
} z)fg>?AGr
[&5%$ T
public void remove() { {(5M)|>
SortUtil.swap(queue,1,size--); RD6`b_]o
fixDown(1); 83pXj=k<
} |IZFWZd
file://fixdown um=qT)/D
private void fixDown(int k) { |>dqZ_)v
int j; H|8i|vbi
while ((j = k << 1) <= size) { GmdS~Fhp
if (j < size %26amp;%26amp; queue[j] j++; ia*Bcx_RW+
if (queue[k]>queue[j]) file://不用交换 +i(;@% kv
break; +kM*BCPYE
SortUtil.swap(queue,j,k); OE(!^"5?[
k = j; ."h>I @MH
} `{+aJ0<S
} >U62vX"
private void fixUp(int k) { qlg?'l$03)
while (k > 1) { ,3bAlc8D7
int j = k >> 1; qwvch^?>FQ
if (queue[j]>queue[k]) t@+z r3
break; 4>Y\Y$3
SortUtil.swap(queue,j,k); (;2]`D [x
k = j; +`+r\*C5
} 87OX:6
} `y*o-St3
ZJ'FZ8Sx
} _8s1Wh G
$@eFSA5k,7
} 6B&ERdoX
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SortUtil： FQO>%=&4
p77
package org.rut.util.algorithm; q/3 )yG6s
- %`iLu
import org.rut.util.algorithm.support.BubbleSort; *:,y`!F=y
import org.rut.util.algorithm.support.HeapSort; _Bq[c
import org.rut.util.algorithm.support.ImprovedMergeSort; D`@*udn=
import org.rut.util.algorithm.support.ImprovedQuickSort; lk%W2N5
import org.rut.util.algorithm.support.InsertSort; /F_(&H!m
import org.rut.util.algorithm.support.MergeSort; 1J[|Ow
import org.rut.util.algorithm.support.QuickSort; TUO*w
import org.rut.util.algorithm.support.SelectionSort; ]oE:p
import org.rut.util.algorithm.support.ShellSort; B+n(K+
:=2l1Y[-G
/** T]y^PT<8?
* @author treeroot `t Zw(Z=h
* @since 2006-2-2 }Oe9Zq
* @version 1.0 !~a1xI~s
*/ {f[X)
public class SortUtil { `dm}|$X|
public final static int INSERT = 1; $?dutbE
public final static int BUBBLE = 2; KO&oT#S
public final static int SELECTION = 3; ]V.0%Ccw;.
public final static int SHELL = 4; xYD.j~
public final static int QUICK = 5; vj+ S
public final static int IMPROVED_QUICK = 6; Qh!h "]
public final static int MERGE = 7; (7?jjH^4
public final static int IMPROVED_MERGE = 8; I>%@[h,+
public final static int HEAP = 9; |emZZj
]?n~?dD{]
public static void sort(int[] data) { j[&C6l+wH
sort(data, IMPROVED_QUICK); yUlYf#`H
} {+x;J4
private static String[] name={ tjt#2i8/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" UkgiSv+
}; '`/w%OEVC5
U Y')|2y 5
private static Sort[] impl=new Sort[]{ 3`>nQ4zC
new InsertSort(), WG(%Pkowv
new BubbleSort(), 8~eYN-#W&
new SelectionSort(), I+FQ2\J*H
new ShellSort(), <:Z-zQp)?
new QuickSort(), 93fClF|@
new ImprovedQuickSort(), V8IEfU
new MergeSort(), Q0-}!5`E1$
new ImprovedMergeSort(), [y1 x`WOk9
new HeapSort() [cvtF(,
}; &+-]!^2o
@DK;i_i
public static String toString(int algorithm){ 0OPpALl
return name[algorithm-1]; [XDr-5Dm
} #`b5kqQm
k5TPzm=y{
public static void sort(int[] data, int algorithm) { X7{ h/^
impl[algorithm-1].sort(data); E|5lm
} drEND`,@6|
Yn1CU
public static interface Sort { Fc.1)yh.
public void sort(int[] data); V.12
} u<a =TPAU
sN9 SuQ
public static void swap(int[] data, int i, int j) { .qG*$W2f
int temp = data; )1 =|\
data = data[j]; #vBS7ba
data[j] = temp; .m \y6
} 3FpSo+
} q+}Er*r