[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; rF}Q(<Y86
} U<F|A!Fg
int i1=l; 6.tA$#6HP
int i2=mid+1; gT=pO`a
for(int cur=l;cur<=r;cur++){ zqt%x?l
if(i1==mid+1) 3H<%\SYp
data[cur]=temp[i2++]; bLWY Tj
else if(i2>r) I%:?f{\
data[cur]=temp[i1++]; 4dN <B U
else if(temp[i1] data[cur]=temp[i1++]; T)<^S(57
else 96;5
data[cur]=temp[i2++]; sk07|9nU
} A[@koLCL
} 6d5J*y2
RX{} UmU<
} kWa5=BW2f
,K@[+ R!
改进后的归并排序: trjpq{,[U
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package org.rut.util.algorithm.support; z3 ^_C`(F
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import org.rut.util.algorithm.SortUtil; 5~UW=
^kC!a>&
/** .>r3ZwrE'
* @author treeroot V=&M\58
* @since 2006-2-2 _U LzA
* @version 1.0 8kcMgCO
*/ %MGt3)
public class ImprovedMergeSort implements SortUtil.Sort { 2[=3-1c
"~.4z,ha
private static final int THRESHOLD = 10; Yh^8 !
RiAMW|M"C
/* kf<c[su
* (non-Javadoc) CvZ\Z472.j
* N3lz-vP-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o(DG 3qk
*/ DC/Czkv9
public void sort(int[] data) { {U>N*&_`
int[] temp=new int[data.length]; qe(gKKA%q
mergeSort(data,temp,0,data.length-1); 7@g0>1Fz
} RhB)AUAj
QL7.QG
private void mergeSort(int[] data, int[] temp, int l, int r) { qs\Cwn!
int i, j, k; y]PuY\+
int mid = (l + r) / 2; ?+yM3As9_V
if (l == r) N<b2xT
return; IUEpE9_
if ((mid - l) >= THRESHOLD) mT-[I<
mergeSort(data, temp, l, mid); $aU.M3
else JvvN>bg
insertSort(data, l, mid - l + 1); j[R.UB3J
if ((r - mid) > THRESHOLD) L#'XN H"
mergeSort(data, temp, mid + 1, r); Gt?l 2s
else 32HF&P+0%
insertSort(data, mid + 1, r - mid); .`_iWfK
i5Sya]FN
for (i = l; i <= mid; i++) { : qK-Rku
temp = data; |cnps$fk~
} 9.xRDk
for (j = 1; j <= r - mid; j++) { #C.
temp[r - j + 1] = data[j + mid]; #Ff8_xhP2
} _x""-X~OL
int a = temp[l]; sG_/E-%5'
int b = temp[r]; EN[T3 Y
for (i = l, j = r, k = l; k <= r; k++) { } LC
if (a < b) { (K8Ob3zN_
data[k] = temp[i++]; ![Gn0X?]
a = temp; 4'`P+p"A
} else { i\^4EQ
data[k] = temp[j--]; 1|w@f&W"
b = temp[j]; k]$oir
} P%Vq#5
} ))Z>$\<:
} vR!g1gI23
Wq+GlB*
/** yZ[g2*1L
* @param data N>*+Wg$Ne
* @param l U/kQwrM
* @param i zdU46|!u
*/ 6@8t>"}
private void insertSort(int[] data, int start, int len) { O<V 4j,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %1jcY0zEQ
} pZ\7!rON
} -@_v@]:
} Q 318a0
} eBxm
rq!*unJ
堆排序： (&Lt&i _
1,;zX^
package org.rut.util.algorithm.support; _iq62[i3^
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import org.rut.util.algorithm.SortUtil; :8oJG8WH
~AYleM
/** ojlyW})$%
* @author treeroot 4P1}XYD-2
* @since 2006-2-2 A&Aj!#
* @version 1.0 0mUVa=)D
*/ g;p} -=
public class HeapSort implements SortUtil.Sort{ 6MY<6t0a
hchG\i
/* (non-Javadoc) @>VVB{1@,]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jy2gR1~
*/ pk.\IKlG]
public void sort(int[] data) { ^5Lk}<utw
MaxHeap h=new MaxHeap(); 51y"#\7
h.init(data); <nqv)g"u0
for(int i=0;i h.remove(); mrnPZf i
System.arraycopy(h.queue,1,data,0,data.length); 1F5KDWtE
} :zKMw=
4L8hn4F
private static class MaxHeap{ R^/SBrWve
0stc$~~v
void init(int[] data){ HBOyiIm Q
this.queue=new int[data.length+1]; D%yY&q;
for(int i=0;i queue[++size]=data; bz#]>RD
fixUp(size); =iKl<CqI$E
} Pb8@owG8
} "#o..?K
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private int size=0; 77)WNL/ x
RM `qC
private int[] queue; $+7uB-KsU
'-RacNY
public int get() { q{Z#}|km#
return queue[1]; m?<E >-bI
} ~o%igJ }.C
xH*X5?
public void remove() { HVHv,:bPo
SortUtil.swap(queue,1,size--); qJdlZW<
fixDown(1); \_8wU'7
} xxu
file://fixdown jO&*E'pk
private void fixDown(int k) { 9ET1Er{4
int j; 0(eaVi-%D
while ((j = k << 1) <= size) { vsj4?0=
if (j < size %26amp;%26amp; queue[j] j++; ^r&)@R$V
if (queue[k]>queue[j]) file://不用交换 mvZ#FF1,J
break; s<FBr,
SortUtil.swap(queue,j,k); l^Rb%?4Z
k = j; LQ# E+id&
} C{zp8 A(Dh
} \|S!g_30m
private void fixUp(int k) { _/I">/ivlM
while (k > 1) { P$z_A8}
int j = k >> 1; {k)gDJU
if (queue[j]>queue[k]) \\FT.e6
break; .N qXdari
SortUtil.swap(queue,j,k); DHWz,M
k = j; , [|aWT%9
} z6ObX
} Ck Nl;g l
a9.yuSzL
} _rwJ:r
aaFT
} ;Nj9,Va(t
aE`d[dSG
SortUtil： +GI906K
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package org.rut.util.algorithm; R{H[< s+n
e(?w h
import org.rut.util.algorithm.support.BubbleSort; K@O^\
import org.rut.util.algorithm.support.HeapSort; 7pyzPc#_
import org.rut.util.algorithm.support.ImprovedMergeSort; !=YKfzE
import org.rut.util.algorithm.support.ImprovedQuickSort; fu^W# "{
import org.rut.util.algorithm.support.InsertSort; BHUI1y5t
import org.rut.util.algorithm.support.MergeSort; A#=TR_@:
import org.rut.util.algorithm.support.QuickSort; <:}nd:l1
import org.rut.util.algorithm.support.SelectionSort; H3D<"4Q>
import org.rut.util.algorithm.support.ShellSort; XnQR(r)pR2
Ku75YFO,5
/** qcj {rG18
* @author treeroot -d\sKc
* @since 2006-2-2 CBEf;Ig
* @version 1.0 pUXoSnIq:
*/ \#_ymM0
public class SortUtil { gYB!KM *v
public final static int INSERT = 1; W[\6h Zv
public final static int BUBBLE = 2; G@k]rwub
public final static int SELECTION = 3; Dw%'u'HG
public final static int SHELL = 4; sE pI)9
public final static int QUICK = 5; !ajBZ>Q
public final static int IMPROVED_QUICK = 6; } a9Ah:.7/
public final static int MERGE = 7; &<PIm
public final static int IMPROVED_MERGE = 8; P]43FPb
public final static int HEAP = 9; V\;Xa0
_B0(1(M<2
public static void sort(int[] data) { \wK&wRn)
sort(data, IMPROVED_QUICK); f"ndLX:'}
} q!ZM Wg
private static String[] name={ |58HPW9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !ZYPz}&N_
}; `x[Is$
6O7s^d&K
private static Sort[] impl=new Sort[]{ Wo1xZZ
new InsertSort(), 4dX{an]Cz
new BubbleSort(), X7},|cmD_
new SelectionSort(), mM,HMrgLqK
new ShellSort(), q>$MqKWM
new QuickSort(), 51jgx,-|$
new ImprovedQuickSort(), KewW8H~tb
new MergeSort(), X4 Arn,
new ImprovedMergeSort(), AE0uBv
new HeapSort() ~L)~p%rbi
}; ~3F'X
uuC ["Z
public static String toString(int algorithm){ Jka>Er
return name[algorithm-1]; {zwH3)|Hn
} ngo> ^9/8
n)e2?
public static void sort(int[] data, int algorithm) { LhJUoX
impl[algorithm-1].sort(data); srGOIK.
} 0MWW( ;
!T{+s T
public static interface Sort { QyD0WC}i
public void sort(int[] data); 'hpOpIsHa
} +%JBr+1#\
5=pE*ETJ
public static void swap(int[] data, int i, int j) { Q^(CqQo!<
int temp = data; P.Z:`P)
data = data[j]; $w0TEO!
data[j] = temp; $DY#04Je\=
} Jo5Bmh0
} YM}a>o