[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{bv|vF
} OI"g-+~
int i1=l; -$:*!55:j
int i2=mid+1; Skr0WQ
for(int cur=l;cur<=r;cur++){ _KkaseR
if(i1==mid+1) Fw{#4
data[cur]=temp[i2++]; "+Ys}t~2
else if(i2>r) 5#N<~
data[cur]=temp[i1++]; @ <2y+_e
else if(temp[i1] data[cur]=temp[i1++]; 9L3P'!Z
else -u<F>C
data[cur]=temp[i2++]; &z5?]`ALu
} m ie~. "
} Tp{jR<
MN5}}@
} $'_Q@ZBq
rtQ{
改进后的归并排序: aXQAm$/ >
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package org.rut.util.algorithm.support; |6DJ5VFzD
UF6U5],`u
import org.rut.util.algorithm.SortUtil; Y3FFi M[s~
qC"`i}7
/** T,uF^%$@AQ
* @author treeroot 5pDE!6gQ
* @since 2006-2-2 6SE^+@jR
* @version 1.0 RMpiwO^
*/ s-'~t#h
public class ImprovedMergeSort implements SortUtil.Sort { <T)0I1S
Qt{V&Z7
private static final int THRESHOLD = 10; $6J22m!S4n
htL1aQ.
/* z;e@m2.IM
* (non-Javadoc) s5+;8u9K
* eFS$;3FP1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :E|Jqi\
*/ ,X:3w3nr^
public void sort(int[] data) { I3r")}P
int[] temp=new int[data.length]; ~,KrL(jC
mergeSort(data,temp,0,data.length-1); l59 N0G
} Vj1V;dHv
5{+2#-
private void mergeSort(int[] data, int[] temp, int l, int r) { L'`Au/%S}
int i, j, k; S#oBO%!
int mid = (l + r) / 2; _unoDoB
if (l == r) \nWbGS(
return; WHOy\j},V
if ((mid - l) >= THRESHOLD) NvTK7? v
mergeSort(data, temp, l, mid); *q,nALs
else 1BW9,Xr
insertSort(data, l, mid - l + 1); C@]D*k
if ((r - mid) > THRESHOLD) 40`Qsv0#
mergeSort(data, temp, mid + 1, r); +e*C`uP!
else J?dz>3Rhx9
insertSort(data, mid + 1, r - mid); FW;}S9u3
-:'%YHxX
for (i = l; i <= mid; i++) { NT5##XOB
temp = data; )F&.0 '
} |@1(^GX
for (j = 1; j <= r - mid; j++) { 0g=vMLi
temp[r - j + 1] = data[j + mid]; 3WwCo.q;m
} us1$
int a = temp[l]; <"`f!k#[
int b = temp[r]; S *J{
for (i = l, j = r, k = l; k <= r; k++) { Wtk|}>Pf
if (a < b) { 5%QYe]D
data[k] = temp[i++]; 2^Im~p~ByE
a = temp; aZ{l6
} else { eFf9T@
data[k] = temp[j--]; 5izpQ'>
b = temp[j]; m*jE\+)=^
} o$%KbfXO]
} TNN@G~@cm
} AX6:*aZB
ecH7")
/** Kf(Px%G6K
* @param data E>*Wu<<
* @param l G,P k3>I'
* @param i *\}$,/m['
*/ 6|n3Q$p
private void insertSort(int[] data, int start, int len) { sGNHA(;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vRW;{,d
} QQ{*j7i)
} _99 +Vjy
} h:C:opa-=
} |x&4vHXR0
MNTVG&h
堆排序： 33eOM(`D[
a;U)#*(5|v
package org.rut.util.algorithm.support; JgP%4)]LV
A/}[Z\C
import org.rut.util.algorithm.SortUtil; }2*qv4},!
!blGc$kC
/** WL'!M&h
* @author treeroot dQ_'8 )
* @since 2006-2-2 NM),2%<
* @version 1.0 hSAI G
*/ HfP<hQmN'
public class HeapSort implements SortUtil.Sort{ FqnD"]A
Ge?DD,ac
/* (non-Javadoc) )g $T%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8dt=@pwx&
*/ PGxv4(%
public void sort(int[] data) { y0O e)oP
MaxHeap h=new MaxHeap(); %G6x\[,
h.init(data); %RF$Y=c'C
for(int i=0;i h.remove(); 0;=]MEk?
System.arraycopy(h.queue,1,data,0,data.length); )>Z@')Uk:
} Mg8ciV}\xY
~p{YuW[e
private static class MaxHeap{ ]{{%d4
.}+3A~
void init(int[] data){ MZA%ET,l,<
this.queue=new int[data.length+1]; S{]3e-?
for(int i=0;i queue[++size]=data; =x(k)RTDu
fixUp(size); ^c.pvC"4j
} rP"Y.;s
} y/_=
}7{(o-
private int size=0; glM42s
S;8=+I,
private int[] queue; <~v4BiQ3l^
6MU;9|&
public int get() { +:70vZc:V@
return queue[1]; A>S7Ap4z>
} 7oUo[
Rw[!Jq
public void remove() { 8(q8}s$>
SortUtil.swap(queue,1,size--); 48J{Y3F
fixDown(1); Zg4wd/y?
} 4z~;4
file://fixdown [rAi9LSO"
private void fixDown(int k) { :*|So5fs
int j; 6fBA#Kb
while ((j = k << 1) <= size) { g%m-*v*
if (j < size %26amp;%26amp; queue[j] j++; XPt>klf
if (queue[k]>queue[j]) file://不用交换 (o{x*';i4
break; k6@
SortUtil.swap(queue,j,k); C deV3
k = j; efHCPj
} >k=@YLj
} |)O;+e\
private void fixUp(int k) { oHSDi
while (k > 1) { "~6&rt
int j = k >> 1; gr.G']9lNq
if (queue[j]>queue[k]) sMJa4P>O@
break; #%OS=.V
SortUtil.swap(queue,j,k); v!<FeLW
k = j; -{d(~XIo
} f1o^:}5x
} SjJ$Oinc
*(i%\
} r<P?F
#Ak9f-pf
} 9nlj{(
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SortUtil： ]:?hU^H]<
?=kH}'igq
package org.rut.util.algorithm; 7Ot&]M
?G&J_L=@Y
import org.rut.util.algorithm.support.BubbleSort; Dp^=%F{t
import org.rut.util.algorithm.support.HeapSort; ~:_10g]r
import org.rut.util.algorithm.support.ImprovedMergeSort; `r\/5|M
import org.rut.util.algorithm.support.ImprovedQuickSort; E J6|y'
import org.rut.util.algorithm.support.InsertSort; SwrzW'%A
import org.rut.util.algorithm.support.MergeSort; B*QLKO:)i
import org.rut.util.algorithm.support.QuickSort; o(3OChH
import org.rut.util.algorithm.support.SelectionSort; LT,zk)5
import org.rut.util.algorithm.support.ShellSort; { M[iYFg=
B4m34)EOE
/** =PjdL32
* @author treeroot 2U+Fat@
* @since 2006-2-2 'q8:1i9\[
* @version 1.0 %/s+-j@s:
*/ 0.(7R,-
public class SortUtil { _R ;$tG,
public final static int INSERT = 1; '=K~M
public final static int BUBBLE = 2; `VglE?M
public final static int SELECTION = 3; ?$/W3Xn0%
public final static int SHELL = 4; w0<1=;_%
public final static int QUICK = 5; =1O;,8`
public final static int IMPROVED_QUICK = 6; !g~u'r'1
public final static int MERGE = 7; #Wv8+&n
public final static int IMPROVED_MERGE = 8; uBM%E OE
public final static int HEAP = 9; poqNiOm4%
HGj[\kU~
public static void sort(int[] data) { '^2bC
sort(data, IMPROVED_QUICK); "Vwk&~B%
} [>QzT"=
private static String[] name={ V`feUFw3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a'my0m
}; Q b5vyV `
v:9Vp{)
private static Sort[] impl=new Sort[]{ MP Q?Q]'
new InsertSort(), LN'})CI8m
new BubbleSort(), WO+>W+|N
new SelectionSort(), o1&Oug
new ShellSort(), c^,8eb7c
new QuickSort(), :pP l|"
new ImprovedQuickSort(), $f6wmI;<y
new MergeSort(), ~}K$z
new ImprovedMergeSort(), >lO]/3j1
new HeapSort() P2U[PO
}; ?V)M!
dda*gq/p
public static String toString(int algorithm){ yfAh=
return name[algorithm-1]; h61BIc@>
} U owbk:
GM@0$
public static void sort(int[] data, int algorithm) { (xBWxeL~
impl[algorithm-1].sort(data); k]A$?C0Q<%
} {r?Ly15
M_;hfpJZ
public static interface Sort { N#X(gEV
public void sort(int[] data); >>h0(G|
} XO/JnJ^B
Iw</X}#\
public static void swap(int[] data, int i, int j) { Qu|<1CrZj]
int temp = data; CX>QP&Gj
data = data[j]; >#xIqxV,
data[j] = temp; 0VI[6t@
} E-$N!KY
} ~_4$|WKl