[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; T!)(Dv8@F
} _g"<UV*H
int i1=l; i2SR{e8:GF
int i2=mid+1; H9Q&tl9
for(int cur=l;cur<=r;cur++){ O5T{eBo\
if(i1==mid+1) *_\_'@1|J)
data[cur]=temp[i2++]; oV78Hq6
else if(i2>r) >e5qv(y]
data[cur]=temp[i1++]; a~y'RyA
else if(temp[i1] data[cur]=temp[i1++]; V/9!K%y
else G mA< g
data[cur]=temp[i2++]; uiR8,H9*M
} DT&@^$?
} U-tTW*[1]
,UF_`|
} kVLS
0*{%=M
改进后的归并排序: )|#sfHv7
b,1ePS
package org.rut.util.algorithm.support; ,/|T-Ka
m#\dSl}
import org.rut.util.algorithm.SortUtil; QD]6C2j*
]Gq !`O1
/** ml }{|Yz
* @author treeroot -r]W
* @since 2006-2-2 [FR`Z=%
* @version 1.0 /R wjCUf
*/ q9s=~d7
public class ImprovedMergeSort implements SortUtil.Sort { ;vjOUn[E
V1B5w_^>h'
private static final int THRESHOLD = 10; p9{mS7R9T
>(t6.=
/* ds[|
* (non-Javadoc) g}(L;fy>7
* j*r{2f4Rt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !'*-$e
*/ c(s.5p ^
public void sort(int[] data) { i?^L/b`H
int[] temp=new int[data.length]; =U?dbSf1*
mergeSort(data,temp,0,data.length-1); j/?kL{B
} ]>Es4 s
<frutU16\
private void mergeSort(int[] data, int[] temp, int l, int r) { >}6%#CAf
int i, j, k; 4 "'~NvO
int mid = (l + r) / 2; &6nWzF
if (l == r) ~oY^;/ j
return; \z(gqkc 6
if ((mid - l) >= THRESHOLD) \(2sW^fY
mergeSort(data, temp, l, mid); sD#.Oq4&]y
else oW6XF-yM
insertSort(data, l, mid - l + 1); 40m-ch6Q
if ((r - mid) > THRESHOLD) P71Lqy)5}A
mergeSort(data, temp, mid + 1, r); -PR N:'T
else WNrk}LFof
insertSort(data, mid + 1, r - mid); C!bUI8x z
TAW/zpps$
for (i = l; i <= mid; i++) { kMN~Y
temp = data; <h *4Q
} k@W1-D?
for (j = 1; j <= r - mid; j++) { Lt>IX")
temp[r - j + 1] = data[j + mid]; O6^]=/wd
} P@c5pc#|
int a = temp[l]; 61'XgkacDS
int b = temp[r]; 8FY?!C
for (i = l, j = r, k = l; k <= r; k++) { 7J<5f)
if (a < b) { -e:`|(Mo
data[k] = temp[i++]; 8v%o,"
a = temp; &^Q/,H~S
} else { c\AfaK^KF
data[k] = temp[j--]; C]A.i2o8
b = temp[j]; l!u_"I8j5
} g]0_5?i
} P-"y3 ZE=
} 7zG_(83)K
1p=]hC
/** xU`p|(SS-
* @param data HN|%9{VeB
* @param l & >fQp(f
* @param i _.8S&
*/ #AQV(;r7@
private void insertSort(int[] data, int start, int len) { /IMFO:c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0n{=%Q
} h~zT ydnH
} o?\?@H
} /%io+94
} C;^X[x%h7$
~Z'?LV<t
堆排序： c{w2Gt!
i=2N;sAl
package org.rut.util.algorithm.support; R4:b{)=O
f) L
import org.rut.util.algorithm.SortUtil; f4|rVP|x
qUb&
/** t"oeQ*d%
* @author treeroot }@d@3
* @since 2006-2-2 hp|YE'uYT
* @version 1.0 I%KYtv~`
*/ e+fN6v5pU
public class HeapSort implements SortUtil.Sort{ IW] rb/H
CRy|kkT
/* (non-Javadoc) $ $mV d+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5`p.#
*/ uoh7Sz5!^
public void sort(int[] data) { ]:J$w]\
MaxHeap h=new MaxHeap(); 4^o^F-k'
h.init(data); @cXMG6:{
for(int i=0;i h.remove(); uQKT
System.arraycopy(h.queue,1,data,0,data.length); 63IM]J
} a9Zq{Ysj
[(7S.5I
private static class MaxHeap{ b@hqz!)l`
'!B&:X)
void init(int[] data){ 5\VWCI
this.queue=new int[data.length+1]; 7s^'d,P
for(int i=0;i queue[++size]=data; X 0+vXz{~g
fixUp(size); {]4LULq
} sK?twg;D*|
} HJ.-Dg5U
$6R-5oQ
private int size=0; 5]:U9ts#
j^RmrOg,
private int[] queue; JNnDts*w
&mS^ZyG
public int get() { (KZ{^X?a
return queue[1]; a/xn'"eli
} $VOFOc
kb!%-k
public void remove() { 5wU]!bxr
SortUtil.swap(queue,1,size--); SQ+Gvq%Q]
fixDown(1); ) ;Y;Q
} j8:\%|
file://fixdown Dk51z@
private void fixDown(int k) { kvu)y`
int j; ((%?`y
while ((j = k << 1) <= size) { ,f?*{Q2
if (j < size %26amp;%26amp; queue[j] j++; {(Es(Sb}c
if (queue[k]>queue[j]) file://不用交换 k)TpnH! "
break; XfIJ4ZM5
SortUtil.swap(queue,j,k); LCV(,lu
k = j; Xne1gms
} dft!lBN
} BDQsP$'6QT
private void fixUp(int k) { ":N9(}9
while (k > 1) { 9QJyZ
int j = k >> 1; N!tX<u~2
if (queue[j]>queue[k]) R[+<^s}p/
break; SOaoo^,O
SortUtil.swap(queue,j,k); AbW6x
k = j; +R75v)
} gf\oC> N
} FW DNpr
}"%N4(Kd
} * kh tJ]=
_ jlRlt
} (S Yln>o
goWuw}?
SortUtil： 2y1Sne=<Kb
lr&a;aZp
package org.rut.util.algorithm; V>rU.Mp QU
VuZr:-K/
import org.rut.util.algorithm.support.BubbleSort; -yNlyHv9
import org.rut.util.algorithm.support.HeapSort; Z0r'S]fe
import org.rut.util.algorithm.support.ImprovedMergeSort; Zx>=tx}
import org.rut.util.algorithm.support.ImprovedQuickSort; \o3gKoL%
import org.rut.util.algorithm.support.InsertSort; S$-7SEkO+
import org.rut.util.algorithm.support.MergeSort; ba9?(+i$h
import org.rut.util.algorithm.support.QuickSort; ?:9"X$XR
import org.rut.util.algorithm.support.SelectionSort; 8zq=N#x
import org.rut.util.algorithm.support.ShellSort; sNFlKQ8)Q
A^SgI-y|
/** <IW$m!{VG
* @author treeroot @IZnFHN
* @since 2006-2-2 ~pky@O#b
* @version 1.0 %A0/1{(
*/ >^{yF~(
public class SortUtil { j_j]"ew)
public final static int INSERT = 1; 7_[L o4_
public final static int BUBBLE = 2; -$Ih@2"6
public final static int SELECTION = 3; ~)M~EX&pK
public final static int SHELL = 4; %\:Wi#w>
public final static int QUICK = 5; dqcL]e
public final static int IMPROVED_QUICK = 6; MLp9y#
public final static int MERGE = 7; 8H`[*|{'
public final static int IMPROVED_MERGE = 8; ]hV*r@d
public final static int HEAP = 9; <%mRSv
9;If&uM
public static void sort(int[] data) { uhq8
sort(data, IMPROVED_QUICK); ,<X9Y2B
} 9:lFo=
private static String[] name={ -trkA'ewZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F((4U"
}; _)iCa3z
tX~w{|k
private static Sort[] impl=new Sort[]{ /dIzY0<aO
new InsertSort(), dDGQ`+H9
new BubbleSort(), ]eV8b*d6
new SelectionSort(), K:WDl;8(d
new ShellSort(), 62NsJ<#>
new QuickSort(), b#o|6HkW
new ImprovedQuickSort(), I]_5}[I
new MergeSort(), :rP=t ,
new ImprovedMergeSort(), \GU<43J2uo
new HeapSort() b\5F]r
}; !bP@n
{K!)Ss
public static String toString(int algorithm){ TkF[x%o
return name[algorithm-1]; bW:!5"_{H
} o}{5iTg=
!dT4
public static void sort(int[] data, int algorithm) { 5~S5F3
impl[algorithm-1].sort(data); -tU'yKhn
} ?&uu[y
=i3n42M#
public static interface Sort { NX&_p!_V
public void sort(int[] data); dQG=G%W
} 2 ? 4!K.
\}G^\p6?M
public static void swap(int[] data, int i, int j) { gI`m.EH}}N
int temp = data; >.D4co>
data = data[j]; u]G\H!WkQ
data[j] = temp; 3iU=c&P
} Qv ?"b
} JsS-n'gF'