[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; :wCC^Y]
} $y4M#yv
int i1=l; JOHp?3"4
int i2=mid+1; Bcm=G""
for(int cur=l;cur<=r;cur++){ %#Q #N,fw
if(i1==mid+1) nP)-Y#`~7
data[cur]=temp[i2++]; QQ|9>QP
else if(i2>r) Q2R>lzB
data[cur]=temp[i1++]; |Kn^w4mN
else if(temp[i1] data[cur]=temp[i1++]; ^ N_`^m
else ZArf;&8
data[cur]=temp[i2++]; n(# c`t*
} @f'AWeJ2
} c$.T<r)Z
%w%zv2d
} JgZdS-~
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改进后的归并排序: qZc)Sa.S
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package org.rut.util.algorithm.support; 8Nv-/VQ/b
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import org.rut.util.algorithm.SortUtil; {&b-}f"m
)xbqQW7%0+
/** 7dx4~dF
* @author treeroot ^f"&}%"M
* @since 2006-2-2 6P6Jx;
* @version 1.0 k dUc&
*/ /3;=xZq
public class ImprovedMergeSort implements SortUtil.Sort { 'jwTGT5x
F6h/0i
private static final int THRESHOLD = 10; -y<rM0"NE
J2x$uO{Bn
/* q .)^B@}_
* (non-Javadoc) -hm9sNox
* t"FRLC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }8X:?S %
*/ C(ZcR_+r$,
public void sort(int[] data) { F.&*D~f
int[] temp=new int[data.length]; Kjvs@~6t
mergeSort(data,temp,0,data.length-1); 9Z}S]-u/
} 0c{Gr 0[>
13]y)(
private void mergeSort(int[] data, int[] temp, int l, int r) { m./*LXU
int i, j, k; %k~C-+
int mid = (l + r) / 2; lK 9s0t'
if (l == r) csm?oUniz
return; Zr~"\llk
if ((mid - l) >= THRESHOLD) fG^7@Jw:G
mergeSort(data, temp, l, mid); I[vME"
else 7jD@Gp`" 3
insertSort(data, l, mid - l + 1); F\l!A'Q+t
if ((r - mid) > THRESHOLD) ZlUFJ*pk
mergeSort(data, temp, mid + 1, r); I\)N\move
else +# A|Zp<
insertSort(data, mid + 1, r - mid); jh-kCF
mRNHq3
for (i = l; i <= mid; i++) { X@G[=Rs
temp = data; ZO]E@?Oav
} | H5Ync[s
for (j = 1; j <= r - mid; j++) { sVNo\
temp[r - j + 1] = data[j + mid]; $4&8U~Zs
} ggzAU6J
int a = temp[l]; P'KY.TjWb
int b = temp[r]; vsxvHot=
for (i = l, j = r, k = l; k <= r; k++) { "1E?3PFJ
if (a < b) { 3" 8t)s
data[k] = temp[i++]; F5Cqv0HV
a = temp; vQE` c@^{
} else { GWVEIZ
data[k] = temp[j--]; qsQ]M^@>
b = temp[j]; F\I5fNs@
} $XtV8
} |2tSUOZ
} kvY} yw7
:ga 9Db9P
/** 9iiU,}M`j
* @param data 8Fyc#Xo8
* @param l |v,}%UN2
* @param i $v2S;UB v*
*/ %!1@aL]pQ
private void insertSort(int[] data, int start, int len) { ]M02>=1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z0FR33-
} L2do2_
} %l0_PhAB
} Z%(Df3~gmm
} jTGS6{E
!:R^}pMhIk
堆排序： U]1>?,Nk'3
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package org.rut.util.algorithm.support; i&? 78+:
q>wa#1X)
import org.rut.util.algorithm.SortUtil; AqTR.}H
pRb+'v&_k
/** YLr%vnO*NS
* @author treeroot HQjxJd5P
* @since 2006-2-2 _CYmG"mY
* @version 1.0 Ej9/_0lt
*/ UeIqAG8
public class HeapSort implements SortUtil.Sort{ c9>8IW
Zi15wE
/* (non-Javadoc) 1D#T+t`[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2\kC_o97
*/ VhJyWH%(
public void sort(int[] data) { 6Vu}kK)
MaxHeap h=new MaxHeap(); hv_pb#1Ks
h.init(data); g%KGF)+H
for(int i=0;i h.remove(); IDL^0:eg<.
System.arraycopy(h.queue,1,data,0,data.length); y'i:%n}I
} bF8xQ<i~Y
t(LlWd
private static class MaxHeap{ 6=aBD_2@
.F=<r-0
void init(int[] data){ MC[`<W)u
this.queue=new int[data.length+1]; H-PW(
for(int i=0;i queue[++size]=data; 3tx0y
fixUp(size); !kjr>:)x
} v>yGsJnV'
} kfG65aa>_
[7ek;d;'t
private int size=0; h|Teh-@A5
_ cHV3cz
private int[] queue; +)''l
~Iu21Q(*
public int get() { 9|?(GG
return queue[1]; ;Fwm1ezx0
} 0|*UeM
519:yt
public void remove() { l%Fse&4\
SortUtil.swap(queue,1,size--); D+@/x{wX2
fixDown(1); 7o 83|s.Bm
} W6!4Qyn
file://fixdown U- UV<}
private void fixDown(int k) { 2rE~V.)%
int j; H8Z Z@@ qm
while ((j = k << 1) <= size) { !EyGJa[i
if (j < size %26amp;%26amp; queue[j] j++; 8M(|{~~3:
if (queue[k]>queue[j]) file://不用交换 .,BD DPFB
break; $ M[}(m
SortUtil.swap(queue,j,k); A(!ZZ9Wc
k = j; nP3;<*T P0
} /d]V{I~6
} 0ga1Yr]
private void fixUp(int k) { DFZ:.6p
while (k > 1) { S &lTKYP
int j = k >> 1; %I2xK.8=
if (queue[j]>queue[k]) Z ^9{Qq
break; AcfkY m~
SortUtil.swap(queue,j,k); X?k V1
k = j; 4q2=:"z4
} M}KM]<
} ")[Q4H;V
8bKWIN g_n
} Bafz&#;Q'
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} =-s20mdj
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SortUtil： M b /X@51
$'mB8 S
package org.rut.util.algorithm; Ubos#hP
Xxsnpb>
import org.rut.util.algorithm.support.BubbleSort; +e3WwUx
import org.rut.util.algorithm.support.HeapSort; o-e,
import org.rut.util.algorithm.support.ImprovedMergeSort; [C~)&2wh>
import org.rut.util.algorithm.support.ImprovedQuickSort; ^Hhw(@`qf
import org.rut.util.algorithm.support.InsertSort; %JA&O
import org.rut.util.algorithm.support.MergeSort; >[P7Zlwv4
import org.rut.util.algorithm.support.QuickSort; ws=9u-
import org.rut.util.algorithm.support.SelectionSort; GVHfN5bTqn
import org.rut.util.algorithm.support.ShellSort; 2ZzD^:V[}
+hvIJv ?
/** "!_ 4%z-
* @author treeroot 94k)a8-!
* @since 2006-2-2 {-7yZ]OO$
* @version 1.0 EX_sJc
*/ ; K 6Fe)
public class SortUtil { Z!=Pc$?
public final static int INSERT = 1; D A)0Y_
public final static int BUBBLE = 2; bCx1g/
public final static int SELECTION = 3; cTIwA:)D
public final static int SHELL = 4; UC LjR<}
public final static int QUICK = 5; H* L2gw
public final static int IMPROVED_QUICK = 6; +K?N:w
public final static int MERGE = 7; H6 f; BS
public final static int IMPROVED_MERGE = 8; #* /W!UOu
public final static int HEAP = 9; 5`{;hFl
j?KB8oY`TP
public static void sort(int[] data) { $?JLCa
sort(data, IMPROVED_QUICK); [+cnx21{
} 'LLQ[JJ=O
private static String[] name={ -$MC
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "i<3}6/*
}; -O>mY)
mP .&fS
private static Sort[] impl=new Sort[]{ dK(%u9v
new InsertSort(), j{w,<Wt>
new BubbleSort(), zhm!sMlO
new SelectionSort(), MfpWow-#{
new ShellSort(), C.e|VzQa
new QuickSort(), %LZM5Z^
new ImprovedQuickSort(), VOK$;s'9}
new MergeSort(), f;XsShxr
new ImprovedMergeSort(), \t(r@qq
new HeapSort() a=T7w;\h
}; [W|7r n,q
7te!>gUW
public static String toString(int algorithm){ ~Z/`W`
return name[algorithm-1]; ~JRuMP
} 8sjHQ)<
6l]?%0[*
public static void sort(int[] data, int algorithm) { Jz3<yQ-
impl[algorithm-1].sort(data); x^#{2}4u
} PdN\0B`
.dLX'84fY
public static interface Sort { e2o9)=y
public void sort(int[] data); DW%K'+@M
} ?9okjLp1n
D}/.;]w<[&
public static void swap(int[] data, int i, int j) { gx9sBkoq5D
int temp = data; *]| JX&
data = data[j]; T2PFE4+Dp
data[j] = temp; a1sLRqo8
} 7<'i#E~
} :-@P3F[0