[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; Y@:l!4DI
} cLp_\\
int i1=l; 5=8v\q?)c
int i2=mid+1; t\LE\[XM>
for(int cur=l;cur<=r;cur++){ 50dN~(;p
if(i1==mid+1) )b (+=
data[cur]=temp[i2++]; \BH?GMoP
else if(i2>r) W!T[ ^+
data[cur]=temp[i1++]; s-5#P,Lw
else if(temp[i1] data[cur]=temp[i1++]; r>! @Z2%s
else 9(qoME}>=
data[cur]=temp[i2++]; p>kny?AJ
} tV_3!7m0$
} s0]ZE\`H>
x0>N{ADXQ
} X.>~DT%0Lm
n$NM
改进后的归并排序: S"@6,
ygV_"=+|N
package org.rut.util.algorithm.support; pGD-K41O]
={v(me0ZPb
import org.rut.util.algorithm.SortUtil; U\,N
:R +BC2x
/** FWU>WHX
* @author treeroot -(e=S^36
* @since 2006-2-2 ,aD~7QX1:
* @version 1.0 J zFR9DEt
*/ *~4<CP+"0
public class ImprovedMergeSort implements SortUtil.Sort { o/ 51RH
l%('5oz@\
private static final int THRESHOLD = 10; KPDJ$,:
w8~R=k
/* r_+!3
* (non-Javadoc) olr#3te
* N.+A-[7,W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x^_c4,i)
*/ a!4p$pR
public void sort(int[] data) { = 03G~7B>
int[] temp=new int[data.length]; cUP1Uolvn
mergeSort(data,temp,0,data.length-1); o\ce|Dzt
} ?Fl O,|
Mv/ SU">F
private void mergeSort(int[] data, int[] temp, int l, int r) { ^tSwAanP\
int i, j, k; ?D7zty+}^
int mid = (l + r) / 2; q)o;iR
if (l == r) x4>"m(&%
return; -6WSYpHV
if ((mid - l) >= THRESHOLD) AxH`4=3<
mergeSort(data, temp, l, mid); BMQ4i&kF|
else J=8Y D"1
insertSort(data, l, mid - l + 1); 4,W,E4 7
if ((r - mid) > THRESHOLD) J!RRG~
mergeSort(data, temp, mid + 1, r); _1O .{O
else qhG2j;
insertSort(data, mid + 1, r - mid); mJd8?d
"[k>pzl6
for (i = l; i <= mid; i++) { yMM2us#*+q
temp = data; b@=H$"
} ]8OmYU%6V
for (j = 1; j <= r - mid; j++) { Ake l.&
temp[r - j + 1] = data[j + mid]; etX(~"gG_
} \p}GW
int a = temp[l]; k >.U!
int b = temp[r]; 6Y6t.j0vN.
for (i = l, j = r, k = l; k <= r; k++) { w;(=wN\
if (a < b) { q&3(yhx
data[k] = temp[i++]; _*g.U=u
a = temp; AqQ5L>:Gq
} else { 9bRUN<
data[k] = temp[j--]; GutiqVP:B
b = temp[j]; ;5$ GJu(
} nL[OwfPj
} vg3iT}
} hT_Q_1,
nO'C2)bBSG
/** *' es(]W
* @param data q9VBK(,X
* @param l :/6aBM?
* @param i v8'XchJ
*/ .}eM"Kv
private void insertSort(int[] data, int start, int len) { |{-?OOKj
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^x/D8M
} })kx#_o]'d
} 1ljcbD)T;
} _-#o[>2[
} x $[_Hix
;.xKVH/@
堆排序： {*g{9`
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package org.rut.util.algorithm.support; d:vc)]M>f{
xL<c/B`-:
import org.rut.util.algorithm.SortUtil; ^?\|2H
9An\uH)mL
/** ?li/mc.XG
* @author treeroot Sfc,F8$&N
* @since 2006-2-2 H/Ql
* @version 1.0 Y%y
*/ B<Cg_C
public class HeapSort implements SortUtil.Sort{ ^.g-}r8,
~,)D n
/* (non-Javadoc) 9mn~57`y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1 |)CQ
*/ l O*
public void sort(int[] data) { 2!CL8hG5:
MaxHeap h=new MaxHeap(); @}waZ?'
h.init(data); +>2.O2)%q
for(int i=0;i h.remove(); </5
System.arraycopy(h.queue,1,data,0,data.length); wL]#]DiE
} snu?+*6
,afO\oe>MG
private static class MaxHeap{ @ZJ}lED3
|=~mRqG
void init(int[] data){ lfd-!(tXD
this.queue=new int[data.length+1]; v$JW7CKA
for(int i=0;i queue[++size]=data; v+trHdSBYE
fixUp(size); cUd>ahv
} &w`Ho)P
} 5! +{JTXa
7B5b +
private int size=0; a+O?bO
73]t5=D:
private int[] queue; o$U{.#
m J$[X
public int get() { r| \""
return queue[1]; YSfJUB!I
} o@[o6.B<
#4"eQ*.*"
public void remove() { *:un+k
SortUtil.swap(queue,1,size--); *<[\|L:#]Z
fixDown(1); UQYHR+
} *V+,X
file://fixdown xC0y2+)|
private void fixDown(int k) { R-,L"Vv
int j; d( ru5*p
while ((j = k << 1) <= size) { m]Qs BK
if (j < size %26amp;%26amp; queue[j] j++; %BMlcm7Ec
if (queue[k]>queue[j]) file://不用交换 :f_oN3F p
break; #uC}IX2n
SortUtil.swap(queue,j,k); FzCXA=m
k = j; P\{s C6E
} ^'Rs`e
} 9jx>&MnWs
private void fixUp(int k) { M$>Nd6,@N
while (k > 1) { aZa1eE
int j = k >> 1; $[Nf?`f(t_
if (queue[j]>queue[k]) 7zU~X,
break; U,fPG/9
SortUtil.swap(queue,j,k); vo)W ziHh
k = j; (Nd)$Oq[4
} K)[\IJJM
} kVt/Hhd9
<HS{A$]
} MYz!zI
eAjR(\f>
} 63$`KG3
lZ2gCZ
SortUtil： ]-a/)8
[TqX"@4NS
package org.rut.util.algorithm; u}_x
C8)s6
import org.rut.util.algorithm.support.BubbleSort; usoyH0t!?
import org.rut.util.algorithm.support.HeapSort; qx*b\6Rt
import org.rut.util.algorithm.support.ImprovedMergeSort; [0kZyjCq@
import org.rut.util.algorithm.support.ImprovedQuickSort; QG L~??
import org.rut.util.algorithm.support.InsertSort; <m{#u4FC'
import org.rut.util.algorithm.support.MergeSort; 2\|sXC
import org.rut.util.algorithm.support.QuickSort; $$Ibr]$5
import org.rut.util.algorithm.support.SelectionSort; yzL9Ic
import org.rut.util.algorithm.support.ShellSort; t@+e#3P!
M_cm,|FF
/** 4@mJEi{
* @author treeroot IkA~+6UY
* @since 2006-2-2 W>&*.3{v
* @version 1.0 8NE[L#k
*/ H<g8u{ $
public class SortUtil { |DVFi2
public final static int INSERT = 1; o"P)(;
public final static int BUBBLE = 2; K)Z~ iBRM
public final static int SELECTION = 3; At[SkG}b
public final static int SHELL = 4; 9oP
public final static int QUICK = 5; a%6=sqxE
public final static int IMPROVED_QUICK = 6; X2,v'`U5&
public final static int MERGE = 7; Y-+Kf5_[
public final static int IMPROVED_MERGE = 8; VJCj=jX
public final static int HEAP = 9; 8 K)GH:a
6e5A8e8"]
public static void sort(int[] data) { w_~tY*IwB
sort(data, IMPROVED_QUICK); =1)9>=}
} oz|+{b}%
private static String[] name={ }"%mP 4]&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" < %<nh`D
}; ~% `hh9]
9ku|w#%I
private static Sort[] impl=new Sort[]{ vtK.7AF
new InsertSort(), V;)+v#4{
new BubbleSort(), L7xiq{t`Y
new SelectionSort(), 9j-;-`$S
new ShellSort(), M9~'dS'XI
new QuickSort(), f= }!c*l"
new ImprovedQuickSort(), **1=|aa:
new MergeSort(), A5%Now;.cf
new ImprovedMergeSort(), 6-5{7E}/b
new HeapSort() &H}Xk!q5b^
}; W&I:z-VH
GGZ9DC\{
public static String toString(int algorithm){ ]1h9:PF
return name[algorithm-1]; @q@I(%_`
} {S@, ,
!g|[A7<|
public static void sort(int[] data, int algorithm) { :qShP3^
impl[algorithm-1].sort(data); =t~]@?]1D
} N PqO b
|GPYbxzc
public static interface Sort { i`}9VaUG
public void sort(int[] data); r9D 68*H
} *`Ge8?qC
*lheF>^
public static void swap(int[] data, int i, int j) { NNJQDkO-I
int temp = data; {D,- Whi
data = data[j]; C9FAX$$^(Y
data[j] = temp; <5h}\5#<j
} &&"+\^3
} Y10