[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; uFaT~ 4
} %@%~<U)W
int i1=l; #*G}v%Ow/u
int i2=mid+1; =E&1e;_xlE
for(int cur=l;cur<=r;cur++){ (R!.=95@
if(i1==mid+1) s2K8|q=
data[cur]=temp[i2++]; 8,:lw3x1
else if(i2>r) j0S[JpoF
data[cur]=temp[i1++]; f1t?<=3Ek<
else if(temp[i1] data[cur]=temp[i1++]; w^S]HzMd
else ' &Nv|v\V
data[cur]=temp[i2++]; 4rD&Lg'
} s_6Iz^]I
} (KR.dxzjf
MA v-#
} dkZ[~hEQG-
pFEU^]V3*
改进后的归并排序: qwo{34
l{. XhB
package org.rut.util.algorithm.support; g]._J
d^`n/"Ice
import org.rut.util.algorithm.SortUtil; I5g!c|#y
ts=+k/Z
/** AUR{O
* @author treeroot Ft8ii|-
* @since 2006-2-2 $"Nqto~
* @version 1.0 |l,0bkY@&
*/ SuA`F|7?P
public class ImprovedMergeSort implements SortUtil.Sort { q)]S:$?BT
Y IVN;:B.
private static final int THRESHOLD = 10; =7zvp,B
do@BJWo
/* nAyyjd3!S
* (non-Javadoc) )(`,!s,8)
* =UFmN"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HuajdC~
*/ :UDe\zcd"
public void sort(int[] data) { PL*kjrLu7
int[] temp=new int[data.length]; G88g@Exk
mergeSort(data,temp,0,data.length-1); |z.Ov&d4)(
} 5~xv"S(E}
],Y+|uX->
private void mergeSort(int[] data, int[] temp, int l, int r) { }I#,o!)Vd
int i, j, k; q]z%<`.9*
int mid = (l + r) / 2; 9X87"
if (l == r) >^d+;~Q;
return; {i:Ayhq~&
if ((mid - l) >= THRESHOLD) !T26#>mV
mergeSort(data, temp, l, mid); bOdyrynh
else `xu/|})KI
insertSort(data, l, mid - l + 1); {b26DKkQS
if ((r - mid) > THRESHOLD) Rs1JCP=d8
mergeSort(data, temp, mid + 1, r); Xq.GvZS`
else 7a'@NgiGg
insertSort(data, mid + 1, r - mid); Ck^jgB.7
~(d#T|ez
for (i = l; i <= mid; i++) { T\$r|
temp = data; H%`|yUE(
} >tVD[wVF0
for (j = 1; j <= r - mid; j++) { |>AHc_:$$
temp[r - j + 1] = data[j + mid]; ='GY:.N
} &io*pmUm6
int a = temp[l]; 7%Ii:5Bp
int b = temp[r]; uOnyU+fZV
for (i = l, j = r, k = l; k <= r; k++) { 'Lv>!s 7
if (a < b) { WG.J-2#3
data[k] = temp[i++]; "ku ?A^f
a = temp; ixIfJ
} else { 5K %
data[k] = temp[j--]; fW.)!EPO
b = temp[j]; XveG#oyiU
} G[!Y6c3
} Zp*0%x!e
} h"5!puN+
YkbZ 2J*-
/** Fl&Z}&5p
* @param data ti^msC8e
* @param l "<I*ViZ
* @param i [EU\-
*/ #9)D.d|5
private void insertSort(int[] data, int start, int len) { p-;I"uKv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o{wXq)b
} X[up$<
} rq>OmMQ67
} ^%r>f@h!L
} }c~o3t(7`b
X6g{qzHg_
堆排序： !K$qh{n
k+FiW3-
package org.rut.util.algorithm.support; 5L8)w5
$"G=r(MW
import org.rut.util.algorithm.SortUtil; &;O)Dw
'-[~I>o%
/** dNMz(~A[Y
* @author treeroot O A9G] 8k
* @since 2006-2-2 XLNR%)l
* @version 1.0 nm597WeZp
*/ /Sag_[i
public class HeapSort implements SortUtil.Sort{ BCtm05
};=44E'7
/* (non-Javadoc) )Cm7v@B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P,@ :?6
*/ Yuo
public void sort(int[] data) { V!94I2%#x
MaxHeap h=new MaxHeap(); vtS[Tkk|A
h.init(data); C_JDQByfL
for(int i=0;i h.remove(); ucVn `
System.arraycopy(h.queue,1,data,0,data.length); qrtA'fU
} A!&hjV`
C3p/|{TP
private static class MaxHeap{ \-?@ &' :
v3vQfcxR
void init(int[] data){ mSu1/?PS
this.queue=new int[data.length+1]; XvIrO]F-
for(int i=0;i queue[++size]=data; eZ^-gk?
fixUp(size); {IlX@qWr
} >pV|c\
} oL2 a:\7
)j[rm
private int size=0; |rDv!m
#~SQujgB
private int[] queue; E4nj*Lp~+
Ew|VDD(.
public int get() { .Y"H{|]Mnh
return queue[1]; )Bq~1M 2
} Y^Olcz
uNV\_'9>Y
public void remove() { SbLx`]rI
SortUtil.swap(queue,1,size--); :$`"M#vMX
fixDown(1); 0m|$ vb
} '01ifA^
file://fixdown Q@in?};
private void fixDown(int k) { `zjEs8`'
int j; (>E70|T
while ((j = k << 1) <= size) { Zljj
if (j < size %26amp;%26amp; queue[j] j++; *[(}rpp M
if (queue[k]>queue[j]) file://不用交换 jo.Sg:7&
break; "Yo.]PU
SortUtil.swap(queue,j,k); :CQ-?mT^LA
k = j; AQ>8]`e`
} 3}@!TI
} MmjeFv
private void fixUp(int k) { z]NzLz9VfL
while (k > 1) { V0,%g+.^
int j = k >> 1; iY /N%T;
if (queue[j]>queue[k]) &gn^i!%Z)
break; }=':)?'-.
SortUtil.swap(queue,j,k); p/4\O
k = j; 0$-N
} z(AhO
} 0i[,`>-Av
>Jl(9)e
} Q1fJ`A=
rpk )i:k\
} \;z*j|;B
>AT{\W!N
SortUtil： ?h;Zdv>`xz
f\W1u#;u)
package org.rut.util.algorithm; B?qLXRv
mCa[?
import org.rut.util.algorithm.support.BubbleSort; LRqBP|bjCD
import org.rut.util.algorithm.support.HeapSort; <<zYF.9L]
import org.rut.util.algorithm.support.ImprovedMergeSort; CzF#feTA
import org.rut.util.algorithm.support.ImprovedQuickSort; .^<4]
import org.rut.util.algorithm.support.InsertSort; }n+#o!uEf
import org.rut.util.algorithm.support.MergeSort; vZHm'
import org.rut.util.algorithm.support.QuickSort; "v @h
import org.rut.util.algorithm.support.SelectionSort; Iv6(Z>pAB
import org.rut.util.algorithm.support.ShellSort; L'dR;T[;
!ejLqb
/** G+^Q _w
* @author treeroot GXV<fc"1
* @since 2006-2-2 N`FgjnQ`
* @version 1.0 1m*fkM#
*/ _5F8F4QY`
public class SortUtil { lx8@;9fLy
public final static int INSERT = 1; tta\.ic
public final static int BUBBLE = 2; S&y(A0M
public final static int SELECTION = 3; A.aUWh
public final static int SHELL = 4; t(-`==.R
public final static int QUICK = 5; o ]UG*2
public final static int IMPROVED_QUICK = 6; yQA6w%
public final static int MERGE = 7; eyq8wQT
public final static int IMPROVED_MERGE = 8; y\]~S2}G
public final static int HEAP = 9; K !&{k94
F]e]
public static void sort(int[] data) { 3jMHe~.E<
sort(data, IMPROVED_QUICK); *~~&*&+
} C?v_ig
private static String[] name={ {H FF|Dx
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V) #vvnq
}; ?!R Z~~d
>7yOu!l
private static Sort[] impl=new Sort[]{ D^+#RR'#,
new InsertSort(), v%_5!SR
new BubbleSort(), 6%/@b`vZ
new SelectionSort(), %A@Q%l6
new ShellSort(), ''+6qH-.|]
new QuickSort(), =YZyH4eI
new ImprovedQuickSort(), #/u%sX`#y
new MergeSort(), {ZiZ$itf
new ImprovedMergeSort(), 7Sc._G{[%
new HeapSort() `mN*"1p-
}; }pP<+U
@<$-*,
public static String toString(int algorithm){ qd@x#"qT
return name[algorithm-1]; O>YXvu
} 7M~w05tPh
?LP&VU1
public static void sort(int[] data, int algorithm) { >Qk4AMIO
impl[algorithm-1].sort(data); cVrses^yE
} U#=Q`
K OZHz`1!
public static interface Sort { }O+F#/6
public void sort(int[] data); 5v51:g>c
} oz!;sj{,D
EZ+_*_9
public static void swap(int[] data, int i, int j) { gwvy$H
int temp = data; %_*q'6K
data = data[j]; jOuz-1x,&
data[j] = temp; 7x *]
} giU6f!%
} 39s%CcI`k