[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; mtJI#P
} \Dr@n^hk@[
int i1=l; lfWxdi
int i2=mid+1; *[_?4*F
for(int cur=l;cur<=r;cur++){ i<&2Ffvq
if(i1==mid+1) v( (fRX.`
data[cur]=temp[i2++]; *4+;Ey
else if(i2>r) BU])@~$
data[cur]=temp[i1++]; YFsEuaV
else if(temp[i1] data[cur]=temp[i1++]; m: w/[|_
else :Fm+X[n
data[cur]=temp[i2++]; Pm;"Y!S<
} #ljfcQm
} Y+WOU._46I
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} +hKQha!*
xt40hZ$
改进后的归并排序: #msk'MVt
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package org.rut.util.algorithm.support; |QxDjL<&t4
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import org.rut.util.algorithm.SortUtil; # {!Qf\1M
SRj|XCd
/** [\. ho9
* @author treeroot )S>~h;
* @since 2006-2-2 B4&x?-0ZC
* @version 1.0 _RjM .
*/ '<8ewU
public class ImprovedMergeSort implements SortUtil.Sort { 9I9J}&4
/t ,ujTK
private static final int THRESHOLD = 10; ly6?jVJ
:^?ZVi59j
/* ,R*ru*
* (non-Javadoc) .qF@ }dO
* ]y!|x_5c3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _X;5ORH"
*/ W^al`lg+y
public void sort(int[] data) { 1kTJMtZG~
int[] temp=new int[data.length]; e 0!a &w
mergeSort(data,temp,0,data.length-1); tQ] R@i
} 0$* z
Fc42TH p
private void mergeSort(int[] data, int[] temp, int l, int r) { `<+D<x)(3
int i, j, k; hwkol W
int mid = (l + r) / 2; UGr7,+N&w
if (l == r) voV=}.(p
return; ;>|:I(l;
if ((mid - l) >= THRESHOLD) ILTd*f
mergeSort(data, temp, l, mid); I)DLnnQQ
else j3z&0sc2(0
insertSort(data, l, mid - l + 1); Z\O ,9
if ((r - mid) > THRESHOLD) 4z[Z3|_V
mergeSort(data, temp, mid + 1, r); r"J1C
else USe"1(|E
insertSort(data, mid + 1, r - mid); K3'`!Ka*
PX(Gx%s|
for (i = l; i <= mid; i++) { {"'W!WTb
temp = data; RH>b,
} H9nZ%n
for (j = 1; j <= r - mid; j++) { 9 `J`(
temp[r - j + 1] = data[j + mid]; s`GSc)AI
} *F~"4g
int a = temp[l]; nM)]
int b = temp[r]; ){R_o5
for (i = l, j = r, k = l; k <= r; k++) { ?$F:S%eH
if (a < b) { 0XL x@FYn
data[k] = temp[i++]; PS(9?rX#+
a = temp; :uhvDYp(-
} else { j[) i>Qw
data[k] = temp[j--]; z`5+BL,|ND
b = temp[j]; I+8m1*
} QTK\"
} >RE&>T^8
} <k}>eGn
D OPOzh
/** kw|bEL9!u
* @param data <hQ@]2w$
* @param l \L6U}ZQ2V
* @param i uZ%b6+(
*/ 6"eGd"
private void insertSort(int[] data, int start, int len) { B>#zrCD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >x&$lT{OY
} x\;`x$3t
} d<(1^Rto
} @wZ`;J%
} \f0I:%-
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堆排序： ~>xn9vb=
7Dom[f
package org.rut.util.algorithm.support; C6CX{IA]
@QVAsNW:O
import org.rut.util.algorithm.SortUtil; :#I8Cf
cd*y{Wt
/** $*8c0.{U
* @author treeroot F)5QpDmqb
* @since 2006-2-2 1H-R-NNJ:
* @version 1.0 RYS]b[-xZz
*/ JB''Ujyi
public class HeapSort implements SortUtil.Sort{ 9v0.]
=5I1[p;
/* (non-Javadoc) 6DR@$fpt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |PDuvv!.f
*/ hFj.d]S
public void sort(int[] data) { j$&k;S
MaxHeap h=new MaxHeap(); 9BNAj-Xa
h.init(data); [WX+/pm7>
for(int i=0;i h.remove(); X1#D}
System.arraycopy(h.queue,1,data,0,data.length); {3`#? q^o'
} B;hc|v{(
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private static class MaxHeap{ f9&D0x?
Mwp#.du(
void init(int[] data){ xgsD<3
this.queue=new int[data.length+1]; bq<QUw=]q&
for(int i=0;i queue[++size]=data; "p2 $R*ie
fixUp(size); v#YO3nD
} +*!oZKm.
} H&3VPag
_Vj O [hx
private int size=0; :[|`&_D9J
^?&Jq_oU
private int[] queue; :]=Y1*L\)
-md2Z0^ Kc
public int get() { Wq F(
return queue[1]; g4RkkoZ>)
} |3Oe2qb
?ti7iBz?
public void remove() { }9<aX Y,
SortUtil.swap(queue,1,size--); |@Q(~[It
fixDown(1); .;iXe
} 4xe:+sA.N
file://fixdown `H+ 7Hj
private void fixDown(int k) { <s]K~ Vo
int j; ,^:Zf|V
while ((j = k << 1) <= size) { V{ra,a*
if (j < size %26amp;%26amp; queue[j] j++; H<X4R
if (queue[k]>queue[j]) file://不用交换 P}DrUND
break; L1P]T4a@)
SortUtil.swap(queue,j,k); =h5&\4r=
k = j; $-M1<?5
} J U}XSb
} W4|1wd}.t
private void fixUp(int k) { WI[6l6
while (k > 1) { 92+({ fgW
int j = k >> 1; %jqBYn0q'
if (queue[j]>queue[k]) E Jq=MP
break; H6bomp"
SortUtil.swap(queue,j,k); V1xpJ
k = j; \ $X3n\
} `:i|y
} K)l{3\9l|
"*kWM
} Vy16Co
P,CJy|[L
} p Ic;9
*G'zES0x
SortUtil： @T?:[nPf&F
C.%iQx`
package org.rut.util.algorithm; ;# {XNq<1
]$y"|xqR
import org.rut.util.algorithm.support.BubbleSort; JjyQ
import org.rut.util.algorithm.support.HeapSort; { tim{nV
import org.rut.util.algorithm.support.ImprovedMergeSort; XMa(XOnX
import org.rut.util.algorithm.support.ImprovedQuickSort; gigDrf}
import org.rut.util.algorithm.support.InsertSort; >(`|oD`,Y
import org.rut.util.algorithm.support.MergeSort; #wx0xQ~,J
import org.rut.util.algorithm.support.QuickSort; 9]1-J5iO
import org.rut.util.algorithm.support.SelectionSort; uhQ3
import org.rut.util.algorithm.support.ShellSort; e`<=&w
vyN=X]p
/** f^:9gRt
* @author treeroot .fUqsq
* @since 2006-2-2 W-7yi`5
* @version 1.0 *ZKfyn$+~
*/ &p=|z2 J
public class SortUtil { F!c%&Z
public final static int INSERT = 1; _d A-{
public final static int BUBBLE = 2; =WJ*$j(
public final static int SELECTION = 3; azF"tke
public final static int SHELL = 4; oopTo51,a
public final static int QUICK = 5; $T1 D ?X
public final static int IMPROVED_QUICK = 6; $-5iwZ
public final static int MERGE = 7; 8^c|9ow
public final static int IMPROVED_MERGE = 8; \1aj!)
public final static int HEAP = 9; VskyRxfdW3
pc^(@eD
public static void sort(int[] data) { Rj^bZ%t
sort(data, IMPROVED_QUICK); ,yAvLY5P
} Ga N4In[d
private static String[] name={ |+x;18
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" HTf7r-
}; vRn^n
,5t.0XqS
private static Sort[] impl=new Sort[]{ i\},
new InsertSort(), H.O7Y
new BubbleSort(), 7 82NiVed
new SelectionSort(), 7{."Y@
new ShellSort(), Z;7f D
new QuickSort(), .IYOtS
new ImprovedQuickSort(), P[#V{%f*5
new MergeSort(), SZ1+h TY7d
new ImprovedMergeSort(), :g+R}TR[i
new HeapSort() p,]Hs{R
}; /_o1b_1U
z=n"cE[KtB
public static String toString(int algorithm){ )-2OraUm<
return name[algorithm-1]; xI}]q%V
} n&FN?"I/]
&P[eA u
public static void sort(int[] data, int algorithm) { AM'-(x|
impl[algorithm-1].sort(data); -Ww'wH'2
} 3$(1LN
E-.M+[
public static interface Sort { 'S@h._q
public void sort(int[] data); QmbD%kW`3
} b==<7[8
7!Ym~M=
public static void swap(int[] data, int i, int j) { q:J,xC_sF(
int temp = data; j9x}D;?n
data = data[j]; }"Hf/{E$_"
data[j] = temp; pYceMZ$
} bYgrKz@uK
} 'JKFEUzM