[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; Z# :Ww
} @!Pq"/
int i1=l; &A`QPk8n
int i2=mid+1; UOwj"#
for(int cur=l;cur<=r;cur++){ Y8N&[L[z&
if(i1==mid+1) Z<wg`
data[cur]=temp[i2++]; Zs4N0N{
else if(i2>r) yf$7<gwX
data[cur]=temp[i1++]; +uH1rF_&@
else if(temp[i1] data[cur]=temp[i1++]; 4ASc`w*0
else t EN%mK
data[cur]=temp[i2++]; Gh< r_O~L3
} 3sL#_@+yz
} ~vt8|OOo0
h?SUDk:2^
} -@QLE}~k[
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改进后的归并排序: `zvYuKQ.}
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package org.rut.util.algorithm.support; *L!R4;ubE
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import org.rut.util.algorithm.SortUtil; yK{~
P--#5W;^oB
/** /f2*J
* @author treeroot t4Z.b 5g
* @since 2006-2-2 cBAA32wf
* @version 1.0 m3,v&Z
*/ Rk'pymap
public class ImprovedMergeSort implements SortUtil.Sort { Xh{EItk~oO
c-3? D;
private static final int THRESHOLD = 10; 'tdjPdw
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/* BEY}mR]
* (non-Javadoc) )S5Q5"j&=f
* U2h?l `nP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LsmC/+7r$1
*/ YS/DIH{9e
public void sort(int[] data) { <?I~ +
int[] temp=new int[data.length]; 1M+mH#?
mergeSort(data,temp,0,data.length-1); ^,rbA>/L
} L-Hl.UV
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private void mergeSort(int[] data, int[] temp, int l, int r) { S |B7HS5
int i, j, k; >Rr]e`3wG
int mid = (l + r) / 2; LsLsSV
if (l == r) jKtbGVZ7r
return; ^y??pp<1J
if ((mid - l) >= THRESHOLD) 5ecqJ
mergeSort(data, temp, l, mid); uh GL1{
else kmuF*0Bjk
insertSort(data, l, mid - l + 1); f6z[k_lLN
if ((r - mid) > THRESHOLD) O/FQ'o1F
mergeSort(data, temp, mid + 1, r); KI#hII[Q.
else .-o$IQsS
insertSort(data, mid + 1, r - mid); :_vf1>[
g{i(4DHm(
for (i = l; i <= mid; i++) { [WB8X,
temp = data; }96^OQPE
} Q2+e`
for (j = 1; j <= r - mid; j++) { ,H|V\\
temp[r - j + 1] = data[j + mid]; Iz ,C!c
} P>)qN,a
int a = temp[l]; p{88v3b6
int b = temp[r]; }3QEclZr
for (i = l, j = r, k = l; k <= r; k++) { 0uj3kr?cv
if (a < b) { yJ?4B?p(
data[k] = temp[i++]; |{Oe&j3|
a = temp; VkUMMq{
} else { 6 s*#y[$
data[k] = temp[j--]; =i `o+H
b = temp[j]; oo/#]a
} i5rAb<q`
} g4U%(3,>D
} zHyM@*Gf(
O>}aK.H
/** QV" |
* @param data p6sXftk
* @param l k3u3X~u
* @param i /9i2@#J}W1
*/ 38rC; 6
private void insertSort(int[] data, int start, int len) { ?*Jv&f#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g#:?Ay-m
} ':J[KWuV
} V+DN<F-
} $My%7S/3
} sN;xHTY
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堆排序： N5o jXX!l%
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package org.rut.util.algorithm.support; `vUilh ^c
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import org.rut.util.algorithm.SortUtil; EdLbVrN,
Z+E@B>D7A^
/** YQ;?N66
* @author treeroot p'!cGJL
* @since 2006-2-2 qWy(f|:hYi
* @version 1.0 (Y:5u}*Y
*/ cbNrto9
public class HeapSort implements SortUtil.Sort{ 6 fL=2a
)%gigQZ+
/* (non-Javadoc) H71LJfH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Koo%mr
*/ `cCsJm$V"
public void sort(int[] data) { }c^`!9
MaxHeap h=new MaxHeap(); R9^Vk*`gFU
h.init(data); RYy_Ppn96f
for(int i=0;i h.remove(); +AO(e
System.arraycopy(h.queue,1,data,0,data.length); A-qdTJP
} 6gNsh
3N[t2Y1r
private static class MaxHeap{ FG:(H0
pFx7URZA
void init(int[] data){ 5v6*.e'p
this.queue=new int[data.length+1]; 1d"g$i4e
for(int i=0;i queue[++size]=data; &KmVtj
fixUp(size); }[\l$sS
} xZwG@+U=X
} o^}K]ML!t
:!n_a*.{
private int size=0; 1=}+NK!
I ze+](
private int[] queue; ]-&A)M6
V+(1U|@~
public int get() { wL\OAM6R
return queue[1]; "@#^/m)
} Rq|7$O5
>;LXy
public void remove() { M2l0x @|
SortUtil.swap(queue,1,size--); i]Njn k
fixDown(1); scT,yNV
} $qV, z
file://fixdown V9mqJRFJ:
private void fixDown(int k) { (p>?0h9[
int j; TgoaEufS<
while ((j = k << 1) <= size) { ]ri5mnB
if (j < size %26amp;%26amp; queue[j] j++; )[oegfnn-
if (queue[k]>queue[j]) file://不用交换 N2#Wyt8MC
break; '1'De^%6W
SortUtil.swap(queue,j,k); Y23- Im
k = j; oc7&iL
} AY<(`J{
} HRn Q*
private void fixUp(int k) { %-1-y]R|
while (k > 1) { m:SG1m_6
int j = k >> 1; zk#"n&u0
if (queue[j]>queue[k]) #ueWU
break; oR}cE Sr
SortUtil.swap(queue,j,k); i&=I5$
k = j; <Nwqt[.
} > mk>VM
} (E[c-1s
]Dec/Nnj
} y(^t&tgjS
<n? cRk'.
} '{*{
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SortUtil： j*Uz.q?
69N/_V
package org.rut.util.algorithm; >xsbXQ>.
h}0}g]IUx
import org.rut.util.algorithm.support.BubbleSort; o^+2%S`]
import org.rut.util.algorithm.support.HeapSort; ]ie38tX$
import org.rut.util.algorithm.support.ImprovedMergeSort; =S+*=jA
import org.rut.util.algorithm.support.ImprovedQuickSort; Z(F['Zf
import org.rut.util.algorithm.support.InsertSort; sE:~+C6o:
import org.rut.util.algorithm.support.MergeSort; Is&0h|
import org.rut.util.algorithm.support.QuickSort; 8z1#Q#5
import org.rut.util.algorithm.support.SelectionSort; WVZ](D8Gc]
import org.rut.util.algorithm.support.ShellSort; 8L1vtYz
Ec'Hlsgh&T
/** 2S,N9(7
* @author treeroot RRRF/Z;))
* @since 2006-2-2 C-h9_<AwJQ
* @version 1.0 ;YN`E
*/ X(Z~oGyg
public class SortUtil { b'r</ncZ
public final static int INSERT = 1; LY:%k|L9
public final static int BUBBLE = 2; #z6[8B
public final static int SELECTION = 3; G`D rY;
public final static int SHELL = 4; UlP2VKM1&
public final static int QUICK = 5; yM}~]aQ y
public final static int IMPROVED_QUICK = 6; X<8?>#
public final static int MERGE = 7; `)~]3zmG
public final static int IMPROVED_MERGE = 8; 8FT]B/^&m
public final static int HEAP = 9; {&dbxj-'
{=I:K|&
public static void sort(int[] data) { }uR[H2D`L
sort(data, IMPROVED_QUICK); B_Ul&V
} H2kib4^i
private static String[] name={ WwUhwY1o!L
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" PaD6||1F
}; Ah2*7@U
qPQ6`rD\
private static Sort[] impl=new Sort[]{ Nwwn #+
new InsertSort(), )fy-]Ky *
new BubbleSort(), r{>`"
new SelectionSort(), 2x5^kN7
new ShellSort(), q]scKWYI
new QuickSort(), !\< [}2}
new ImprovedQuickSort(), ^/~ZP?%]
new MergeSort(), r=Tz++!
new ImprovedMergeSort(), #Mw 6>5}<
new HeapSort() JtvZ~s
}; #7Fdmnu`
R?t_tmKXC!
public static String toString(int algorithm){ <uYrYqN
return name[algorithm-1]; =fRC$
} ObPXVqG"?
%g_)_ ~
public static void sort(int[] data, int algorithm) { 8KyRD1 (-R
impl[algorithm-1].sort(data); TUBpRABH
} {=%,NwPs
`- HI)-A97
public static interface Sort { TTa$wiW7'
public void sort(int[] data); CM%Rz-c
} !F:ANoaS
5^ck$af
public static void swap(int[] data, int i, int j) { 38GkV.e}$
int temp = data; O=[Q>\p
data = data[j]; N_^PoX935O
data[j] = temp; ["fUSQ
} tVv/G~(
} ))%f"=:wt