[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; ^x4gUT-Wy
} %7{6>6%
int i1=l; L5>>gG,
int i2=mid+1; 2\7]EW
for(int cur=l;cur<=r;cur++){ F<I-^BY)
if(i1==mid+1) 7igrRU#1%
data[cur]=temp[i2++]; {yJ{DU?%Y
else if(i2>r) \Oc3rJ(
data[cur]=temp[i1++]; 7%0PsF _
else if(temp[i1] data[cur]=temp[i1++]; > sUk6Z~
else al^ yCoB
data[cur]=temp[i2++]; _)p%
} f'}23\>
} jdhhvoQ
~#gVs*K
} r<"1$K~Ka
Kyv$yf9
改进后的归并排序: $H5Xa[
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package org.rut.util.algorithm.support; LNr2YRpyz
nc`[fy|}
import org.rut.util.algorithm.SortUtil; `OBDx ^6F
$#0%gs/x
/** 6-<r@{m$
* @author treeroot '&UX'Dd~Q
* @since 2006-2-2 6~}=? sX4
* @version 1.0 yvVs9"|0
*/ 9<xe%V=ki
public class ImprovedMergeSort implements SortUtil.Sort { |vGz 1jLV
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private static final int THRESHOLD = 10; d/|@"z^?
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/* hmks\eb~
* (non-Javadoc) \l#=p+x5
* M34*$>bk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z EG
*/ u<):gI
public void sort(int[] data) { k8w8I$QEM
int[] temp=new int[data.length]; (/Nw
mergeSort(data,temp,0,data.length-1); z<)?8tAgq
} sYeZ.MacU
qG~O]($
private void mergeSort(int[] data, int[] temp, int l, int r) { -N9U lW2S
int i, j, k; 1z*]MYU
int mid = (l + r) / 2; 1z{AzpMZ
if (l == r) u0N1+-6kr+
return; 6n<:ph,h;
if ((mid - l) >= THRESHOLD) zaX30e:R
mergeSort(data, temp, l, mid); >\MV/!W
else ;o#dmG
insertSort(data, l, mid - l + 1); /\C9FGS
if ((r - mid) > THRESHOLD) vk{dL'
mergeSort(data, temp, mid + 1, r); $S6AqUk$
else ?-*_v//g
insertSort(data, mid + 1, r - mid); )=8X[<^i
_4.fT
for (i = l; i <= mid; i++) { j#o0y5S
temp = data; Y]ZOvA5W
} tR*JM$T
for (j = 1; j <= r - mid; j++) { Z~$fTW6g
temp[r - j + 1] = data[j + mid]; zX|CW;
} VNaa(Q
int a = temp[l]; tZ4W]od
int b = temp[r]; )PR{ia64;<
for (i = l, j = r, k = l; k <= r; k++) { Z1*y$=D?3[
if (a < b) { E5.)ro=$
data[k] = temp[i++]; qksN {t
a = temp; *"4 OXyV
} else { ;Q-(tGd
data[k] = temp[j--]; (%\N-[yZ
b = temp[j]; hCc I >[H5
} 2v yB[(
} iv\?TAZC
} *h$Dh5%P
.~C*7_
/** |VTm5.23
* @param data nB"q
* @param l "o%N`Xlx
* @param i 7@MVInV9
*/ oO!@s`
private void insertSort(int[] data, int start, int len) { YP+0uZ[g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vlx wt~
} OY/QA
} _! \X>rfz
} !PJ;d)\T
} 7*uG9iX
)}vQ?n[:'
堆排序： ZA+$ZU^
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package org.rut.util.algorithm.support; <#LHL
5"k_Ms7R,
import org.rut.util.algorithm.SortUtil; vY6eg IO
mI"`.
/** ]#TL~u[
* @author treeroot ~cQP4 kBD]
* @since 2006-2-2 Pa%XLn'5
* @version 1.0 ,)u}8ty3j
*/ <HI5xB_
public class HeapSort implements SortUtil.Sort{ NZmmO )p4
,NPU0IDG>
/* (non-Javadoc) " #_NA`$i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1KAA(W;nq
*/ &KX|gB'
public void sort(int[] data) { vD^^0-Pk6
MaxHeap h=new MaxHeap(); 5fSDdaO
h.init(data); yUqvF6+26
for(int i=0;i h.remove(); 0X~Dxs
System.arraycopy(h.queue,1,data,0,data.length); ':kBHCR7
} q^>$YY>F
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private static class MaxHeap{ kfM}j
n-}.Yc
void init(int[] data){ 9T`xW]Zf
this.queue=new int[data.length+1]; ) ^!oM
for(int i=0;i queue[++size]=data; &}wKC:LSP
fixUp(size); V!a|rTU6
} F;}?O==H;
} `{<2{}2M
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private int size=0; _)ZAf%f?
;9/6X#;$
private int[] queue; .9S
s=u0M;A0Q
public int get() { S\MD]>4
return queue[1]; O"nY4
} LX!16a@SxA
-;_NdL@
public void remove() { +TfMj1Zx
SortUtil.swap(queue,1,size--); UdT~h
fixDown(1); E_/v$
} hnmFhJ !g
file://fixdown Fu(e4E
private void fixDown(int k) { &l-g3l[
int j; = r_&R#~GT
while ((j = k << 1) <= size) { :~{XL>:S
if (j < size %26amp;%26amp; queue[j] j++; &W)ks
if (queue[k]>queue[j]) file://不用交换 J<V}g v
break; 76 #
SortUtil.swap(queue,j,k); yAi#Y3!::
k = j; p$0;~1vH
} 6WzE'0Nyr
} qL,QsRwN
private void fixUp(int k) { #}^ZxEU
while (k > 1) { gh['T,
int j = k >> 1; QSmE:Y
if (queue[j]>queue[k]) *B#<5<T
break; 5MO:hE5sm
SortUtil.swap(queue,j,k); [="moh2*f
k = j; GL.& g{$#+
} fI t:eKHr
} pzCD' !*
uZW ?0W
} U]@t\T3W
4Q,HhqV'
} nZ$,Bjb
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SortUtil： 8n,i5>!d
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package org.rut.util.algorithm; h,\^Sb5AP
7=6p
import org.rut.util.algorithm.support.BubbleSort; VQ$=F8ivG
import org.rut.util.algorithm.support.HeapSort; mdoy1a
import org.rut.util.algorithm.support.ImprovedMergeSort; D-8%lGS
import org.rut.util.algorithm.support.ImprovedQuickSort; ouPwhB,bg
import org.rut.util.algorithm.support.InsertSort; ?k<wI)JR
import org.rut.util.algorithm.support.MergeSort; GmcxN<
import org.rut.util.algorithm.support.QuickSort; N_=7
import org.rut.util.algorithm.support.SelectionSort; F C2oP,
import org.rut.util.algorithm.support.ShellSort; J<H$B +;qR
m Wsegq4
/** 1x V~EX
* @author treeroot B@63=a*kG
* @since 2006-2-2 EN+WEMro
* @version 1.0 ;#G>qo
*/ rM2?"
public class SortUtil { Go^W\y
public final static int INSERT = 1; !-|&
public final static int BUBBLE = 2; d9R0P2
public final static int SELECTION = 3; yaa+j8s]
public final static int SHELL = 4; =9LC"eI&|
public final static int QUICK = 5; \V7Hi\)
public final static int IMPROVED_QUICK = 6; 3`5?Zgp
public final static int MERGE = 7; 6T;C+Y$
public final static int IMPROVED_MERGE = 8; *$1*\oCtz
public final static int HEAP = 9; 2Qc&6-;`
K}1>n2P
public static void sort(int[] data) { st:[|`
sort(data, IMPROVED_QUICK); XaR(q2s
} S2*-UluG
private static String[] name={ H*A)U'`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ) Z0
}; XqyfeY5t
VCX})sp
private static Sort[] impl=new Sort[]{ 0d9rJv}~
new InsertSort(), \@*cj8e
new BubbleSort(), RIC'JLWQ
new SelectionSort(), &dbX>u q
new ShellSort(), 6(ju!pE`
new QuickSort(), H \.EKZ
new ImprovedQuickSort(), 0;!aO.l]K
new MergeSort(), tZk@ RX
new ImprovedMergeSort(), (=)+as"u9*
new HeapSort() >M[rOu (d
}; U@BVVH?,o
IgLP=mqcWK
public static String toString(int algorithm){ gA`/t e
return name[algorithm-1]; ?F(t`0=
} MP w@O0QS
>Cb% `pe
public static void sort(int[] data, int algorithm) { $_S^Aw?
impl[algorithm-1].sort(data); 4Qz
} bO9F rEz5
%UV_ 3
public static interface Sort { f]J?-ks
public void sort(int[] data); c)rI[P7Q
} deda=%w0
z=?ainnKx
public static void swap(int[] data, int i, int j) { l!~8
int temp = data; ^X)U^Qd
data = data[j]; x*}(l%[
data[j] = temp; OC7:Dp4
} jO3Q@N0_
} E-E+/.A