[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; vJ^~J2#5
} a{hc{
int i1=l; Hxgc9Fis
int i2=mid+1; BOG.[?yx
for(int cur=l;cur<=r;cur++){ _avf%OS
if(i1==mid+1) ~i>DF`w$
data[cur]=temp[i2++]; %\T,=9tD\
else if(i2>r) 8{2
data[cur]=temp[i1++]; o9"?z
else if(temp[i1] data[cur]=temp[i1++]; 3c3;8h$k
else 'kcR:5B
data[cur]=temp[i2++]; b&&l
} 72Y6gcg
} e7xBi!I)~
k)S1Zs~G
} 0 h!Du|?
L#byYB;E{
改进后的归并排序: v>B412l
__.MS6"N
package org.rut.util.algorithm.support; A`f"<W-m
8TeOh1\
import org.rut.util.algorithm.SortUtil; F!ztU8,
u*)/e9C
/** \j62"
* @author treeroot "N6HX*
* @since 2006-2-2 "j,vlG
* @version 1.0 C`g "Mk8
*/ ;6[6~L%K}
public class ImprovedMergeSort implements SortUtil.Sort { 8$\j| mN
wPjq B{!Q
private static final int THRESHOLD = 10; ZxwrlaA
/ta}12Z
/* '%[ Y
* (non-Javadoc) goIvm:?
* ~. vridH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S1U0sP@o
*/ ;98b SR/
public void sort(int[] data) { o&E8<e
int[] temp=new int[data.length]; 0HoHu*+FX
mergeSort(data,temp,0,data.length-1); [-_{3qq<e
} =IsmPQKi
?`Yu~a{
private void mergeSort(int[] data, int[] temp, int l, int r) { i3N{Dt
int i, j, k; (is',4^b
int mid = (l + r) / 2; $ItmYj.m
if (l == r) D0FX"BY7
return; m.m6.
if ((mid - l) >= THRESHOLD) :&vX0 Ce:
mergeSort(data, temp, l, mid); ?IHt T3'Rt
else uv/\1N;V3
insertSort(data, l, mid - l + 1); FDLo|aP/v
if ((r - mid) > THRESHOLD) 6-_g1vq
mergeSort(data, temp, mid + 1, r); zY_J7,0g
else *O~y6|U?
insertSort(data, mid + 1, r - mid); `5Kg[nB:
y%i9 b&gDd
for (i = l; i <= mid; i++) { Qq`S=:}~x
temp = data; rz%~=Ca2j
} :C} I6v=
for (j = 1; j <= r - mid; j++) { lK=Is v+
temp[r - j + 1] = data[j + mid]; u_^mN9h
} IRm}?hHf
int a = temp[l]; ,Zn6T"[$
int b = temp[r]; H%vfRl3rB
for (i = l, j = r, k = l; k <= r; k++) { >S7t
if (a < b) { k;+TN9
data[k] = temp[i++]; ;um)JCXz
a = temp; l&+O*=#Hh
} else { A[+)PkR
data[k] = temp[j--]; *HR pbe2
b = temp[j]; ?K[Y"*y2
} j9>[^t3U
} Unb2D4&'
} z1Ieva]
<!Cjq,Sk7
/** h$'6."I
* @param data 6U*CR=4
* @param l 6^LXctW.
* @param i ):G%o
*/ O3o^%0
private void insertSort(int[] data, int start, int len) { SPb+H19;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); kJ5z['4?
} ^^"zjl*^
} ~-A"j\gi"
} UF!qp
} $WIVCp
\nEMj,)
堆排序： $UH:r
i|1*bZ6'
package org.rut.util.algorithm.support; %Z_O\zRqy)
U_*,XLU
import org.rut.util.algorithm.SortUtil; n>,:*5"G
'M~`IN`
/** *ai~!TR
* @author treeroot $\NqD:fgb
* @since 2006-2-2 LsWD^JE.
* @version 1.0 W9%v#;2
*/ A,_O=hA2I
public class HeapSort implements SortUtil.Sort{ ; R+>}6
T-a>k.}y
/* (non-Javadoc) e n~m)r3&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Sxq@W8W
*/ ck{S
public void sort(int[] data) { }?,?2U,8:
MaxHeap h=new MaxHeap(); Q^f{H.
h.init(data); 4}m9,
for(int i=0;i h.remove(); N4+Cg t(
System.arraycopy(h.queue,1,data,0,data.length); IrL%0&*hS
} 2V)+ba|+
g9" wX?*
private static class MaxHeap{ F9o7=5WAb
Xb%Q%"?~
void init(int[] data){ vWoppt
this.queue=new int[data.length+1]; /*y5W-'d^
for(int i=0;i queue[++size]=data; fG'~@'P~
fixUp(size); ?0t^7HMP
} L=#NUNiXr
} rgVRF44X{
P$U"y/
private int size=0; H\QkU`b
W\zZ&*8$
private int[] queue; J~5V7B
@G2# Z
public int get() { zE/l
return queue[1]; wvq4 P
} +XsE
YYn8!FIe
public void remove() { 1jd{AqHl
SortUtil.swap(queue,1,size--); VH]}{i"`
fixDown(1); yIKpyyC9H
} _!o8s%9be
file://fixdown 'w=|uE {^
private void fixDown(int k) { !0@4*>n
int j; o9e8Oj&
while ((j = k << 1) <= size) { T9V=#+8#"
if (j < size %26amp;%26amp; queue[j] j++; )9`HO?
if (queue[k]>queue[j]) file://不用交换 Hnt*,C.0
break; jXeE]A"
SortUtil.swap(queue,j,k); Csuasi3]1d
k = j; vT EqT
} 4 -tC=>>wc
} S&}7XjY
private void fixUp(int k) { [bHm-X]
while (k > 1) { ~g=&wT11
int j = k >> 1; @\&j3A
if (queue[j]>queue[k]) $"vz>SuB
break; .+1I>L
SortUtil.swap(queue,j,k); #sc!H4
k = j; !*:g??[T
} c7r(&h
} 06]3+s{{
K2Abu?
} /7D5I\
INr1bAe$
} teS>t!d
"/6#Z>y
SortUtil： 1k6asz^T
5Qq/nUR
package org.rut.util.algorithm; {C5:as
eP]y\S*P
import org.rut.util.algorithm.support.BubbleSort; #1haq[Uv7
import org.rut.util.algorithm.support.HeapSort; /iO"4%v
import org.rut.util.algorithm.support.ImprovedMergeSort; o5s6$\"
import org.rut.util.algorithm.support.ImprovedQuickSort; vm|u~Yd,s
import org.rut.util.algorithm.support.InsertSort; 8S#$'2sT
import org.rut.util.algorithm.support.MergeSort; X "7CN Td
import org.rut.util.algorithm.support.QuickSort; B`-uZ9k
import org.rut.util.algorithm.support.SelectionSort; 8s6[-F5
import org.rut.util.algorithm.support.ShellSort; "?zWCH
zjr($?
/** eV*QUjS~
* @author treeroot qIuo8o}
* @since 2006-2-2 ,<L4tp+y0
* @version 1.0 r[!~~yu/o
*/ )58O9b
public class SortUtil { yb',nGl~
public final static int INSERT = 1; h7+"*fN
public final static int BUBBLE = 2; h&j2mv(
public final static int SELECTION = 3; +=J$:/&U
public final static int SHELL = 4; c]Epg)E
public final static int QUICK = 5; &)k=ccm
public final static int IMPROVED_QUICK = 6; Hy3J2p9.
public final static int MERGE = 7; i$] :Y`3h
public final static int IMPROVED_MERGE = 8; @HbRfD/!
public final static int HEAP = 9; )L9eLxI
Trs~KcsD
public static void sort(int[] data) { IaeO0\ 4E
sort(data, IMPROVED_QUICK); *}89.kCBF
} w0g@ <( 3
private static String[] name={ v>LK+|U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" YxM\qy{Vr
}; @FIL4sb
#[M^Q h
private static Sort[] impl=new Sort[]{ ?Vg~7Eu0
new InsertSort(), fSbLkd 9
new BubbleSort(), 7310'wc
new SelectionSort(), E9\"@wu[d
new ShellSort(), #-YbZ
new QuickSort(), ?-c|c_|$
new ImprovedQuickSort(), 01@WU1IN
new MergeSort(), p?$N[-W6-
new ImprovedMergeSort(), YWn""8p;P
new HeapSort() >!1]G"U
}; s;bGg
MPUyu(-%{
public static String toString(int algorithm){ N-2#-poDe
return name[algorithm-1]; 'df@4}9
} @\F7nhSfa
E}4{{{r
public static void sort(int[] data, int algorithm) { !f(A9V
impl[algorithm-1].sort(data); }K'A/]'
} oA5Qk3b:
5b rM..
public static interface Sort { B`QF;,3S
public void sort(int[] data); U=JK
} 9c]$d
vx?KenO}
public static void swap(int[] data, int i, int j) { AT I=&O`
int temp = data; UhW{KIW
data = data[j]; q}Po)IUT`5
data[j] = temp; {BlTLAKm
} s7yKxg+`{
} I7Kgi3