[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; K}@:>;*9
} pcG q
int i1=l; `.XU|J*z,
int i2=mid+1; Ab)7hCUW
for(int cur=l;cur<=r;cur++){ xg&vZzcl
if(i1==mid+1) P{ o/F
data[cur]=temp[i2++]; $+j)
else if(i2>r) a{=~#u8
data[cur]=temp[i1++]; 6]*qx5m`<l
else if(temp[i1] data[cur]=temp[i1++]; ^S@b*
else fQh!1R
data[cur]=temp[i2++]; ,#{aAx|]
} <o O_wS@:
} vbU{Et\^
)1ciO+_
} ~Gza$ K
*np|PyLP:
改进后的归并排序: 'u~use"
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package org.rut.util.algorithm.support; W:G*t4i
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import org.rut.util.algorithm.SortUtil; 4k8 @u
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/** |BR&p)7)
* @author treeroot ~yV0SpL
* @since 2006-2-2 [LK 9^/V
* @version 1.0 3yDvr*8-@
*/ j<u`W|vl
public class ImprovedMergeSort implements SortUtil.Sort { _'Z@ < ,L
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private static final int THRESHOLD = 10; ]2+(i
O #"O.GX<
/* z!tHn#
* (non-Javadoc) OB:G5B`
* 0FBifK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Pt$7U[N
*/ hO8B]4=&*
public void sort(int[] data) { }j x{Cw
int[] temp=new int[data.length]; ESAh(A)8
mergeSort(data,temp,0,data.length-1); xfilxd
} \BA_PyS?W+
H4U;~)i
private void mergeSort(int[] data, int[] temp, int l, int r) { rHznXME$wZ
int i, j, k; /C"E*a
int mid = (l + r) / 2; *KNR",.
if (l == r) /@K?W=w4
return; G7u7x?E:B`
if ((mid - l) >= THRESHOLD) 0X;Dr-3<
mergeSort(data, temp, l, mid); xM(
else G8@%)$A
insertSort(data, l, mid - l + 1); F-m1GG0s
if ((r - mid) > THRESHOLD) e2>gQ p/
mergeSort(data, temp, mid + 1, r); 6xwC1V?:0t
else }0I! n@
insertSort(data, mid + 1, r - mid); 5we1q7
q?wBh^
for (i = l; i <= mid; i++) { \|kU{d0
temp = data; ry:tL0;;e#
} 2ma.zI@^u9
for (j = 1; j <= r - mid; j++) { /dIiFr"e}G
temp[r - j + 1] = data[j + mid]; "qF8'58
} GCrMrZ6
int a = temp[l]; ,+XQ!y%
int b = temp[r]; vjWS35i
for (i = l, j = r, k = l; k <= r; k++) { XS>4efCJ
if (a < b) { J?{uG8)
data[k] = temp[i++]; ?U&onGy
a = temp; mY-r:
} else { l`d=sOB^
data[k] = temp[j--]; umc!KOkL
b = temp[j]; 4JucNGv
} /%~`B[4F
} FYzl-7!Y
} Q-AN~k8+)[
7kO 1d{u6b
/** K-K+%U
* @param data F$.M2*9
* @param l I3$v-OiL
* @param i 7l?-2I'c
*/ &iTsuA/7
private void insertSort(int[] data, int start, int len) { rkVZP!7!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); F4*f_lP
} 9K)2OX;$w
} MYu-[Hg
} f"/NY6
} w$1.h'2
8YCtU9D
堆排序： 7:]I@Gc'
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package org.rut.util.algorithm.support; -)w/nq
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import org.rut.util.algorithm.SortUtil; @>da%cX
k(et b#
/** *M&~R(TMn
* @author treeroot XBBsdldZ
* @since 2006-2-2 R5Ti|k.~Y"
* @version 1.0 KY@k4S+
*/ o4d>c{p
public class HeapSort implements SortUtil.Sort{ )x]/b=m
WFTTBUoH
/* (non-Javadoc) <[(xGrEZV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )U5AnL
*/ Dp>/lkk.
public void sort(int[] data) { V<1dA\I"
MaxHeap h=new MaxHeap(); LqW~QEU(
h.init(data); \SyfEcSf2v
for(int i=0;i h.remove(); nlh%O@,
System.arraycopy(h.queue,1,data,0,data.length); ?'^xO:
} 7&2xUcsz)
Dzb@H$BQ7
private static class MaxHeap{ ="MG>4j3.F
zvE]4}VL?
void init(int[] data){ n{|~x":9V
this.queue=new int[data.length+1]; :[!rj
for(int i=0;i queue[++size]=data; Yf|+p65g
fixUp(size); iX}EJD{f
} Nq-qks.&
} >[NNu Y~
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private int size=0; s+,JwV?b
NU81 V0:jG
private int[] queue; 5s8k^n"A
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public int get() { g+U6E6}1
return queue[1]; $5(co)C
} .a?GC(
%vgn>A?]1
public void remove() { iWO16=
SortUtil.swap(queue,1,size--); k]w;(<
fixDown(1); 8H;yrNL
} rqSeh/<iD
file://fixdown E<Efxb'p
private void fixDown(int k) { PU[] Nw
int j; 3(jI
while ((j = k << 1) <= size) { cJGU~\
if (j < size %26amp;%26amp; queue[j] j++; 4;y*y tY*
if (queue[k]>queue[j]) file://不用交换 J&2cf#
break; @}qMI
SortUtil.swap(queue,j,k); rMUn ~
k = j; #Mrof9
} L`3x0u2
} 0;KjP?5
private void fixUp(int k) { 1)w^.8f
while (k > 1) { `|+!H.3
int j = k >> 1; Zg_ fec~6q
if (queue[j]>queue[k]) m>DBO|`
break; DOyYy~Q
SortUtil.swap(queue,j,k); v:|_!+g:
k = j; i1}Y;mj
} 274F+X
} ?31#:Mg6g+
Gu-6~^Km9
} W:'H&`0
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} ^,*!Qk<c
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SortUtil： tP^2NTs%]
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package org.rut.util.algorithm; /'O? 8X<
nF`_3U8e
import org.rut.util.algorithm.support.BubbleSort; =~15q=XY0
import org.rut.util.algorithm.support.HeapSort; c<fl6o)
import org.rut.util.algorithm.support.ImprovedMergeSort; \AQ*T`Dq
import org.rut.util.algorithm.support.ImprovedQuickSort; B _k+Oa2!
import org.rut.util.algorithm.support.InsertSort; ,=jwQG4wq
import org.rut.util.algorithm.support.MergeSort; bdbTK8-
import org.rut.util.algorithm.support.QuickSort; i_Ol vuy~
import org.rut.util.algorithm.support.SelectionSort; ~U}0=lRVS
import org.rut.util.algorithm.support.ShellSort; a'r8J~:jy
usc"m huQ
/** x5jd2wSDx
* @author treeroot g:8k,1y5
* @since 2006-2-2 v)1@Ew=Y%
* @version 1.0 ;auT!a~a#
*/ fAYp\k
public class SortUtil { wkc)2z
public final static int INSERT = 1; }xJ ).D
public final static int BUBBLE = 2; )&Af[mS
public final static int SELECTION = 3; zO)Bf(
public final static int SHELL = 4; )jm!bR`
public final static int QUICK = 5; N.(wR
public final static int IMPROVED_QUICK = 6; -Ph"#R&
public final static int MERGE = 7; bS7%%8C
public final static int IMPROVED_MERGE = 8; @?e+;Sx
public final static int HEAP = 9; k}18 ~cWM
ld
public static void sort(int[] data) { ^Q,-4\ec
sort(data, IMPROVED_QUICK); V96:+r
} [`(W(0U%
private static String[] name={ 3'2>3Y/7Bb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a!guZUg6
}; jJbS{1z
D6N32q@
private static Sort[] impl=new Sort[]{ P.#@1_:gC
new InsertSort(), djmd @{Djt
new BubbleSort(), jEu-CU#:
new SelectionSort(), o&-D[|E|
new ShellSort(), <!;NJLe`
new QuickSort(), r?7tI0
new ImprovedQuickSort(), SJ*qgI?}T
new MergeSort(), \l-JU
new ImprovedMergeSort(), `?=Y^+*!-
new HeapSort() *{<460`!q
}; wDp5HZ>
rUn1*KWbE
public static String toString(int algorithm){ $-AG$1
return name[algorithm-1]; ,)?!p_*@:
} 4m1@lnjp
\uG^w(*)
public static void sort(int[] data, int algorithm) { ,B2p\
impl[algorithm-1].sort(data); L NS O]\
} lq}m0}9<
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public static interface Sort { OjWg>v\v
public void sort(int[] data); :6TLT-B
} [[s^rC<d
,eSII2,r4
public static void swap(int[] data, int i, int j) { %1\~OnT
int temp = data; #kQ1,P6,(
data = data[j]; >lkjoEVQ
data[j] = temp; /JjSx/
} '+&!;Jj,
} xcE2hK/+