[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; .xo_}Vw
} QA!#s\
int i1=l; ~}9Bn)@
int i2=mid+1; c-`37. J
for(int cur=l;cur<=r;cur++){ D2Vv\f
if(i1==mid+1) Seg#s.
data[cur]=temp[i2++]; k!9=
else if(i2>r) "Ac~2<V
data[cur]=temp[i1++]; ;9vIa7L&
else if(temp[i1] data[cur]=temp[i1++]; qkiJHT
else k_BSY=$e*D
data[cur]=temp[i2++]; XUf7yD
} _ Q{T';
} IY03"
!6{Jq]
} q$|0)}
'#KA+?@
改进后的归并排序: 7\f{'KL
gINwvzW{
package org.rut.util.algorithm.support; "B~WcC
_Ws#UL+Nq
import org.rut.util.algorithm.SortUtil; 4*H(sq
tr5'dX4]
/** K:uQ#W.&
* @author treeroot f%L:<4
* @since 2006-2-2 c,.0d
* @version 1.0 l$=Gvb
*/ prqT(1
public class ImprovedMergeSort implements SortUtil.Sort { u*U_7Uw$
'Z59<Ya&x
private static final int THRESHOLD = 10; f>O54T .L.
<3)|44.o&
/* k+f1sV[4}
* (non-Javadoc) t[/\KG8
* y~x#pC*w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |1lf(\T_
*/ 87+.pM|t%
public void sort(int[] data) { F:M/z#:~
int[] temp=new int[data.length]; n$IWoIdbGN
mergeSort(data,temp,0,data.length-1); *&h6*zP?
} nrI"k2oA@
cl@kRX<7'
private void mergeSort(int[] data, int[] temp, int l, int r) { FoQ?U=er
int i, j, k; 4v0dd p
int mid = (l + r) / 2; KUlB2Fqi
if (l == r) Ko4)0&
return; {qY3L8b
if ((mid - l) >= THRESHOLD) ?<Z)*CF)
mergeSort(data, temp, l, mid); A\Lr<{Jh
else H]VsOr
insertSort(data, l, mid - l + 1); ,n^TN{#
if ((r - mid) > THRESHOLD) YfV"_G.ad|
mergeSort(data, temp, mid + 1, r); =jsx(3V
else ZUv ZNf
insertSort(data, mid + 1, r - mid); =kwb` Z/a
7Y%!,ff
for (i = l; i <= mid; i++) { !NILpimi
temp = data; .mC~Ry+t
} CQj/e+eE4
for (j = 1; j <= r - mid; j++) { x`Vy<h 33
temp[r - j + 1] = data[j + mid]; 4u@yJ?U
} (6e!09P&
int a = temp[l]; 9qnuR'BDu
int b = temp[r]; Tavtr9L0XY
for (i = l, j = r, k = l; k <= r; k++) { +GRxHuW,
if (a < b) { K3a>^g
data[k] = temp[i++]; L-`(!j
a = temp; Q-M rH
} else { 7ytm.lU
data[k] = temp[j--]; .L~fFns/
b = temp[j]; n'! -Pv
} O)Xd3w'
} d]^\w'w$
} !1D%-=dWX
FAH[5VDr%
/** "ugX /r$_
* @param data un.G6|S
* @param l =%Q\*xaR.W
* @param i zNNzsT8na
*/ eL>K2Jxq
private void insertSort(int[] data, int start, int len) { Z'voCWCd
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); We[<BJo4
} |3s.;wK
} *K]>}
} eUX@9eML
} C}x4#bNK
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堆排序： 2q2p=H>&
ju8',ZC
package org.rut.util.algorithm.support; &gY;`*<
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import org.rut.util.algorithm.SortUtil; (k7;
=4YbVA+(
/** j:3A;r\
* @author treeroot ]$*$0
* @since 2006-2-2 HY*l4QK
* @version 1.0 *=($r%)
*/ ~5-~q0Ge
public class HeapSort implements SortUtil.Sort{ ##SLwrg
$xKg }cO
/* (non-Javadoc) i n[n Aa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (1QdZD|
*/ 'e+-,CGdY\
public void sort(int[] data) { {LR#(q$1
MaxHeap h=new MaxHeap(); 6|Ba
h.init(data); >qSO,$
for(int i=0;i h.remove(); z'5;f;
System.arraycopy(h.queue,1,data,0,data.length); ^4n2 -DvG
} .F{}~K]
9OrA9r
private static class MaxHeap{ FE$M[^1_
9$B)hrJo
void init(int[] data){ -~QlHp&SY
this.queue=new int[data.length+1]; H}u)%qY+~
for(int i=0;i queue[++size]=data; F?yh23&_4
fixUp(size); e["Z!D_H
} GE/IaLo
} jUV#HT
$bF`PGR_
private int size=0; YHwVj?6W
BDv|~NHs
private int[] queue; o+)m}'T8
VZ9e~){xA
public int get() { (E2lv#[
return queue[1]; }w|=c>'_}
} m? \#vw$
G#_(7X&
public void remove() { :epitpJ
SortUtil.swap(queue,1,size--); e8WPV
fixDown(1); +lY\r +;
} I1eb31<
file://fixdown hr/xpQW
private void fixDown(int k) { mI_ 6f~
int j; ;ph+ZV
while ((j = k << 1) <= size) { DYy@t^sC
if (j < size %26amp;%26amp; queue[j] j++; LaAgoarN
if (queue[k]>queue[j]) file://不用交换 ,d/CU
break; 8EW`*+%=
SortUtil.swap(queue,j,k); B=o#LL
k = j; MSxU>FX0
} $=;bccIob
} "9MX,}X*
private void fixUp(int k) { 7;$L&X
while (k > 1) { bUipp\[aV
int j = k >> 1; VC_3ll]vr
if (queue[j]>queue[k]) ;&7qw69k
break; .{-iq(3
SortUtil.swap(queue,j,k); +#i,87
k = j; JsAb q
} YQfZiz}Fv
} LiHXWi{s
y$;zTH_6j
} 3V8j>&
]8q%bsl+
} _S%OX_UMn^
\k$]GK-
SortUtil： .PA?N{z
-Y!=Iw 4
package org.rut.util.algorithm; t&p:vXF2
$yR{ZFo
import org.rut.util.algorithm.support.BubbleSort; @eG#%6">
import org.rut.util.algorithm.support.HeapSort; ^YB\\a9
import org.rut.util.algorithm.support.ImprovedMergeSort; T^f&58{ 7
import org.rut.util.algorithm.support.ImprovedQuickSort; .n^O)|Z
import org.rut.util.algorithm.support.InsertSort; [8om9 Z3
import org.rut.util.algorithm.support.MergeSort; BhhK|U/
import org.rut.util.algorithm.support.QuickSort; xr1I8 5kM
import org.rut.util.algorithm.support.SelectionSort; 0lJBtk9wn
import org.rut.util.algorithm.support.ShellSort; N|^!"/
5u=U--
/** st1M.}
* @author treeroot r(/P||`l
* @since 2006-2-2 :u|UVp5
* @version 1.0 QVA!z##
*/ HjETinm"
public class SortUtil { J[_?>YJ
public final static int INSERT = 1; 4=#QN
public final static int BUBBLE = 2; w-q=.RSTn=
public final static int SELECTION = 3; CsQ}P)
public final static int SHELL = 4; _#\5]D~""
public final static int QUICK = 5; z;@S_0M,Z
public final static int IMPROVED_QUICK = 6; @?($j)9}
public final static int MERGE = 7; 3`C3+
public final static int IMPROVED_MERGE = 8; ~jrU#<'G9
public final static int HEAP = 9; y|2g"J
iR4,$Nn>
public static void sort(int[] data) { R.n`R|NOd
sort(data, IMPROVED_QUICK); mSvTnd8
} "}azC|:5
private static String[] name={ U]R|ej
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~A{[=v
}; K`AW?p^$Y
^,\se9=(
private static Sort[] impl=new Sort[]{ H"Em|LX^
new InsertSort(), :fMM-?s]
new BubbleSort(), 9DocId.
new SelectionSort(), h?O%XnD
new ShellSort(), %%-Tjw o
new QuickSort(), 9"l%tq_
new ImprovedQuickSort(), 9ixnf=$Jp
new MergeSort(), G#=b6DB
new ImprovedMergeSort(), S3[oA&
new HeapSort() L:];[xa%
}; sjgxx7
Q0oDl8~
public static String toString(int algorithm){ ZBh@%A
return name[algorithm-1]; 'XjHB!!hU
} J1wGK|F~
%>QSeX
public static void sort(int[] data, int algorithm) { e[Ul"pMvS`
impl[algorithm-1].sort(data); r|sy_Sk/{
} s!zr>N"
(>/Dw|,m
public static interface Sort { _KlPbyLU
public void sort(int[] data); )Z`viT
} .~/;v~bL
}N=zn7W
public static void swap(int[] data, int i, int j) { I5AjEp
int temp = data; jq]\oY8y
data = data[j]; ]{l O
data[j] = temp; 4?6'~G$k
} \}_7^)S;
} L``mF(R^