[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&:RSO
} + :iNoDz
int i1=l; :HMnU37m W
int i2=mid+1; A5!f#
for(int cur=l;cur<=r;cur++){ t}_qtO7>
if(i1==mid+1) [KVBT;q6
data[cur]=temp[i2++]; i7cMe8
else if(i2>r) RUYwDtC
data[cur]=temp[i1++]; .OX.z~":y
else if(temp[i1] data[cur]=temp[i1++]; B~caHG1b
else |DwI%%0(F
data[cur]=temp[i2++]; oBifESJ
} NU I|4X
} [=S@lURzm@
^3*/x%A,g
} |a3)U%rUEQ
vZhN% DfY
改进后的归并排序: nFX8:fZ$>
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package org.rut.util.algorithm.support; ]\sBl
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import org.rut.util.algorithm.SortUtil; `fY~Lv{4d_
psgXJe$
/** 6@ToPbj4
* @author treeroot 1i$9x$4~E
* @since 2006-2-2 na(@`(j[
* @version 1.0 bn~=d@'
*/ v&xk?F?WU,
public class ImprovedMergeSort implements SortUtil.Sort { X<#Q~"
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private static final int THRESHOLD = 10; 2Z\6xb|u
aOyAP-m,
/* -81usu&NH
* (non-Javadoc) O292JA
* V78QV3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O}Fp\"
*/ &r/a\t,8n
public void sort(int[] data) { a^,6[
int[] temp=new int[data.length]; m9wV#Ldu
mergeSort(data,temp,0,data.length-1); mI@E>VCV[
} st+X~;PX*
Gv?'R0s
private void mergeSort(int[] data, int[] temp, int l, int r) { 2oGl"3/p
int i, j, k; _F;(#D
int mid = (l + r) / 2; &owBmpz
if (l == r) _udH(NC
return; !3kyPoq+
if ((mid - l) >= THRESHOLD) fS w00F{T
mergeSort(data, temp, l, mid); Q<;f-9q@
else f+Put
insertSort(data, l, mid - l + 1); Y\& 4`v'
if ((r - mid) > THRESHOLD) Uj(,6K8W
mergeSort(data, temp, mid + 1, r); R`:Y&)c_$
else ]uWx<aDB
insertSort(data, mid + 1, r - mid); #J\ 2/~
++5W_Ooep
for (i = l; i <= mid; i++) { %a{cJ6P
temp = data; *G.6\
} }ytc oIuLf
for (j = 1; j <= r - mid; j++) { m!$"-nh9
temp[r - j + 1] = data[j + mid]; ]9l=geZd%;
} c03A_2%
int a = temp[l]; 4 "@BbVYR
int b = temp[r]; .%M=dL>
for (i = l, j = r, k = l; k <= r; k++) { %)i?\(/
if (a < b) { p*-o33Ve
data[k] = temp[i++]; T,TKt%
a = temp; 8N'`kd~6[
} else { q/6d^&
data[k] = temp[j--]; hE/gul?|_
b = temp[j]; >(<OhS(
} B&0-~o3WP
} =L 7scv%i
} |GA4fFE=
gX{V>T(<
/** ]$EKowi
* @param data 15)=>=1mR.
* @param l c_yf=
* @param i :05>~bn>pC
*/ k10dkBoEX
private void insertSort(int[] data, int start, int len) { B=(m;A#G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lw\OsB$
} ;E,%\<
} H/|Mq#K
} ${8 1~
} QDzFl1\P
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堆排序： w5bD
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package org.rut.util.algorithm.support; Q6`oo/
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import org.rut.util.algorithm.SortUtil; QNLkj`PL/
vh"zYl`
/** >Yl?i&3n
* @author treeroot '%. lY9D
* @since 2006-2-2 u%Hegqn
* @version 1.0 6w0/;8(_m
*/ HH&`f3
public class HeapSort implements SortUtil.Sort{ $Dxz21|P7
h:Q*T*py
/* (non-Javadoc) 1Yo9Wf;vP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c]P`U(q9TV
*/ p,* rVz[Y
public void sort(int[] data) { xm6=l".%z
MaxHeap h=new MaxHeap(); |dsd5Vdr
h.init(data); 5sao+dZ"|
for(int i=0;i h.remove(); m;>HUTj
System.arraycopy(h.queue,1,data,0,data.length); N32!*TsWs
} ?i>.<IPOq
)|~pocXt<
private static class MaxHeap{ ~]*P/'-{#
j,K]TJ
void init(int[] data){ u%Bk"noCa
this.queue=new int[data.length+1]; *T$`5|
for(int i=0;i queue[++size]=data; *8CI'UX
fixUp(size); G +o)s
} <Qe30_<K
} u.ffZ]\7l
X|{TwmHd
private int size=0; uCB7(<
s(w6Ldi
private int[] queue; vj]-p=
1mz;4xb
public int get() { VC:.ya|Z
return queue[1]; u7=`u/
} QeuIAs*_
w^s|YF=c
public void remove() { _n,Ye&m
SortUtil.swap(queue,1,size--); gI~Ru8
fixDown(1); (|(#~o]40t
} _Jn-#du
file://fixdown T\eOrWt/
private void fixDown(int k) { >V2Tr$m j
int j; +/'3=!oyd
while ((j = k << 1) <= size) { UiqHUrx
if (j < size %26amp;%26amp; queue[j] j++; oyZ}JTl(Q
if (queue[k]>queue[j]) file://不用交换 OGw =e{
break; IP~*_R"bM
SortUtil.swap(queue,j,k); ]x8^s
k = j; AifnC4
} I'{-T=R-q
} \Bg;}\8X
private void fixUp(int k) { cs `T7?>
while (k > 1) { NRe{0U}nO
int j = k >> 1; )mT{w9u
if (queue[j]>queue[k]) eGwrSF#a)
break; v)mO"\
SortUtil.swap(queue,j,k); ~4S@kYe{3K
k = j; v_3r8My-
} GD<xmuo
} &k*sxW'
wWB-P6
} yANk(
~Wp>tnl
} ;N6Euiz
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SortUtil： Nb~.6bsL
oswS<t{Z
package org.rut.util.algorithm; E96FwA5
JE9SPFQx9M
import org.rut.util.algorithm.support.BubbleSort; {hr>m,O%
import org.rut.util.algorithm.support.HeapSort; 5TqB&GP0
import org.rut.util.algorithm.support.ImprovedMergeSort; :QT0[P5O
import org.rut.util.algorithm.support.ImprovedQuickSort; H,bYzWsrPo
import org.rut.util.algorithm.support.InsertSort; } QVREj
import org.rut.util.algorithm.support.MergeSort; G9J+D?'hH
import org.rut.util.algorithm.support.QuickSort; Sz|;wsF{
import org.rut.util.algorithm.support.SelectionSort; P~/Glak
import org.rut.util.algorithm.support.ShellSort; MA0}BJoW
o,dO.isgh>
/** Bj5_=oo+d
* @author treeroot Y -%g5
* @since 2006-2-2 V+j58Wuf
* @version 1.0 s{\USD6
*/ lArYlR}
public class SortUtil { FGY4u4y
public final static int INSERT = 1; = s^KZV
public final static int BUBBLE = 2; [+<lm 5t
public final static int SELECTION = 3; f mu `o-
public final static int SHELL = 4; FMMQO,BU
public final static int QUICK = 5; .G8+D%%.
public final static int IMPROVED_QUICK = 6; ANh7`AUuO
public final static int MERGE = 7; wPdp!h7B~N
public final static int IMPROVED_MERGE = 8; I/:M~ b
public final static int HEAP = 9; 0IO#h{t
OP>rEUtj
public static void sort(int[] data) { Gxx:<`[ON
sort(data, IMPROVED_QUICK); ^GMM%
} `IL''eJug_
private static String[] name={ \@8j&],dl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8D7=]
}; ',`GdfAsH
I,J*\)-%J
private static Sort[] impl=new Sort[]{ X/Umfci
new InsertSort(), l'TM^B)`c
new BubbleSort(), <d!_.f}v
new SelectionSort(), qXC>DGy
new ShellSort(), Dg(882#_
new QuickSort(), =w&JDj
new ImprovedQuickSort(), J;"66ue(d
new MergeSort(), aF2vw{wT}
new ImprovedMergeSort(), Tv2d?y
new HeapSort() &cy@Be}|T
}; 0RmQfD>
t:|knZq
public static String toString(int algorithm){ 8Ac5K!
return name[algorithm-1]; uXD?s3Wv
} X;`XkOjk
7L68voC@U
public static void sort(int[] data, int algorithm) { rik-C7
impl[algorithm-1].sort(data); zE$KU$
} VE3,k'^v
:rr;9nMR[
public static interface Sort { )"SP >2}
public void sort(int[] data); _4H 9rPhf
} Reci:T(_
a?&{eMEe}
public static void swap(int[] data, int i, int j) { rq=D[vX\N(
int temp = data; ?U3X,uv5J
data = data[j]; ["]r=l
data[j] = temp; rm}OVL
} Wc]L43u
} lxsBXXZg