[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; C"]^Q)aJN
} sUm'
int i1=l; W+1^4::+
int i2=mid+1; B,fo(kG
for(int cur=l;cur<=r;cur++){ & "B=/-(
if(i1==mid+1) Nl1Do:PY
data[cur]=temp[i2++]; D7qOZlX16
else if(i2>r) .XhrCiZ
data[cur]=temp[i1++]; 4I5Y,g{6+
else if(temp[i1] data[cur]=temp[i1++]; Ld-_,-n
else IdxzE_@
data[cur]=temp[i2++]; w)jISu;RG
} G<;*SYAb
} c_l"I9M#r
;IM}|2zuN
} RY*U"G0#w
qb` \)X]9
改进后的归并排序: EDs\,f}
,3 u}x,
package org.rut.util.algorithm.support; B48={
,wdD8ZT'Ip
import org.rut.util.algorithm.SortUtil; 8SS|a
h3@v+Z<}
/** HiJE}V;Vq
* @author treeroot $7A8/#
* @since 2006-2-2 7i1q wRv
* @version 1.0 J!7MZLb
*/ 8kDp_si
public class ImprovedMergeSort implements SortUtil.Sort { U|j`e5)
r-/`"j{O!
private static final int THRESHOLD = 10; 5.J.RE"M
]:/Q]n^
/* 01(AK%e
* (non-Javadoc) *siFj CN<
* -+-_I*(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ges J/I
*/ &XUiKnNW
public void sort(int[] data) { tIS<U(N;
int[] temp=new int[data.length]; >~+ELVB&
mergeSort(data,temp,0,data.length-1); L\z~uo3:
} &Z|P2dI
TrR8?-
private void mergeSort(int[] data, int[] temp, int l, int r) { _/<x
int i, j, k; j^2j&Ta
int mid = (l + r) / 2; v1,oilL
if (l == r) gr-OHeid
return; @49S`
if ((mid - l) >= THRESHOLD) I[X772K
mergeSort(data, temp, l, mid); &~U ]~;@
else B@ KQ]4-
insertSort(data, l, mid - l + 1); ('p5:d
if ((r - mid) > THRESHOLD) P J[`|
mergeSort(data, temp, mid + 1, r); ^\,E&=/}M
else 0NX,QD
insertSort(data, mid + 1, r - mid); ?p8_AL'RS
?=fyc1
for (i = l; i <= mid; i++) { F`]2O:[
temp = data; WQO) =n
} G9<X_
for (j = 1; j <= r - mid; j++) { /fV;^=:8c
temp[r - j + 1] = data[j + mid]; ?#UO./"
} OprkR
int a = temp[l]; )p%E%6p
int b = temp[r]; w$-6-rE]d
for (i = l, j = r, k = l; k <= r; k++) { S#} KIy
if (a < b) { )q3p-)@kQ
data[k] = temp[i++]; 6<(.4a?
a = temp; Z0r?|G0
} else { i&GH/y
data[k] = temp[j--]; Xh;#
b = temp[j]; %sQ^.` 2
} e6RPIg
} C8i^P}y
} G+\GaY[
0'?L#K
/** UByv?KZi
* @param data cDH^\-z
* @param l qPfQy
* @param i lQkQ9##*
*/ 2x0<&Xy#P
private void insertSort(int[] data, int start, int len) { hODWB&b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /J6rv((
} 0}quG^%_
} aPbE;" f
} Q^txVUL
} dL )<% o
l8#EM1g-
堆排序： 0F><P?5
\.#>=!Ie
package org.rut.util.algorithm.support; )U{Qj5W+F
_~iw[*#u
import org.rut.util.algorithm.SortUtil; K~uq,~
-5QZJF2~
/** A '];`
* @author treeroot {fn!'
* @since 2006-2-2 e(=w(;84
* @version 1.0 I83<r9
*/ 6ar
public class HeapSort implements SortUtil.Sort{ x39<6_?G
c.F6~IHu7
/* (non-Javadoc) j^rIH#V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s(q_ o
*/ x0w4)Ic5
public void sort(int[] data) { j9+w#G]hV
MaxHeap h=new MaxHeap(); 161xAig
h.init(data); >]5P 3\AQV
for(int i=0;i h.remove(); W#WVfr
System.arraycopy(h.queue,1,data,0,data.length); Whf.fK
} _X"N1,0
**gXvTqI
private static class MaxHeap{ o"R7,N0rB
LW_f
void init(int[] data){ MfQ?W`Kop
this.queue=new int[data.length+1]; )iK6:s#
for(int i=0;i queue[++size]=data; pOG1jI5<{8
fixUp(size); 2'MZ s]??w
} Ffta](Z;
} Is?La
9ahWIO%
private int size=0; ^V Zk+'4
a\YV3NJ/A
private int[] queue; PQ$%H>{
m:o<XK[>
public int get() { ;)^`3`
return queue[1]; N7 $I^?<
} :^3LvPM
g0ly
public void remove() { i3'9>"`
SortUtil.swap(queue,1,size--); @xYlS5{
fixDown(1); k4y'b
} 5>N2:9We
file://fixdown D#JL!A%O
private void fixDown(int k) { >{J(>B\
int j; s'J:f$flS
while ((j = k << 1) <= size) { AvV|(K"
if (j < size %26amp;%26amp; queue[j] j++; 'AEE[
if (queue[k]>queue[j]) file://不用交换 56-dD5{hxR
break; xCl1g4N
SortUtil.swap(queue,j,k); =uYYsC\T
k = j; 2/=l|!JKLz
} cI?8RF(;
} +jnJ|h({
private void fixUp(int k) { JKmIvZ)8
while (k > 1) { r{I% \R!@
int j = k >> 1; |kV*Jc k
if (queue[j]>queue[k]) H{?vbqQ
break; ktBj|-'>
SortUtil.swap(queue,j,k); ZO$m["|
k = j; 91-o}|3v
} 7f!YoW;1
} ^mO~W!"
V"G*N<q
} WQL\y3f5
S<@7_I
} %Ax3;g#
E3gh?6
SortUtil： Tl[!=S
v4c[(&
package org.rut.util.algorithm; P?B;_W+~A.
LKOwxF#TKT
import org.rut.util.algorithm.support.BubbleSort; Rww{:R
import org.rut.util.algorithm.support.HeapSort; w\i\Wp,FP
import org.rut.util.algorithm.support.ImprovedMergeSort; (w/T-*
import org.rut.util.algorithm.support.ImprovedQuickSort; Xe:jAkDp
import org.rut.util.algorithm.support.InsertSort; Df<xWd2
import org.rut.util.algorithm.support.MergeSort; (I{rLS!o,L
import org.rut.util.algorithm.support.QuickSort; K<ft2anY5
import org.rut.util.algorithm.support.SelectionSort; +kO!Xc%P&
import org.rut.util.algorithm.support.ShellSort; (UvM@]B
q[W 0 N>
/** Q&=w_Wc
* @author treeroot 4Vi`* !
* @since 2006-2-2 1A G<$d5U|
* @version 1.0 $ig0j`
*/ D"rK(
public class SortUtil { J1sv[$9
public final static int INSERT = 1; hp7|m0.JW
public final static int BUBBLE = 2; $r8 ^0ZRr
public final static int SELECTION = 3; QoIT*!
public final static int SHELL = 4; wFsyD3
public final static int QUICK = 5; ';jYOVe
public final static int IMPROVED_QUICK = 6; >TnTnFWX
public final static int MERGE = 7; Be=u&T:~
public final static int IMPROVED_MERGE = 8; 3|4|*6
public final static int HEAP = 9; VE{3}S
EGzzHIZ`!
public static void sort(int[] data) { (b~T]3Es
sort(data, IMPROVED_QUICK); 6ZG+ZHUC&
} !1DKLQ
private static String[] name={ _'>oXQJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fW3(&@
}; B!_mC<*4`X
(#Gw1
private static Sort[] impl=new Sort[]{ ?DQsc9y
new InsertSort(), J|kR5'?x
new BubbleSort(), ()Y4v
new SelectionSort(), TKY*`?ct
new ShellSort(), ,t9^j3Ixg
new QuickSort(), y4I6
new ImprovedQuickSort(), :'3XAntZA
new MergeSort(), X=!^] 3zH
new ImprovedMergeSort(), G{ sOR
new HeapSort() gVv>9W('
}; SmdjyK1~8
Q<'nE
public static String toString(int algorithm){ dzsmIV+
return name[algorithm-1]; v7jq@#-
} gL[yA?GoM
!GLz)#SBl
public static void sort(int[] data, int algorithm) { ,)Ju[
impl[algorithm-1].sort(data); 9N<<{rQ,F
} 6)-X
57zSu3v4Y
public static interface Sort { [los dnH^?
public void sort(int[] data); -o[x2u~n\
} =;3Sx::=
wrbLDod /
public static void swap(int[] data, int i, int j) { Z&4&-RCi
int temp = data; WDc+6/<
data = data[j]; EQ`(yj
data[j] = temp; {G}.b)9FG
} 0Lc9M-Lg
} qY<'<T4\