[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; -DL"Yw}
} dd:vQOF;
int i1=l; >h{)7Hv
int i2=mid+1; }}gtz-w
for(int cur=l;cur<=r;cur++){ J)._&O$
if(i1==mid+1) 0Q!/A5z
data[cur]=temp[i2++]; !YENJJ
else if(i2>r) cN%@ nW0i
data[cur]=temp[i1++]; KK, t!a
else if(temp[i1] data[cur]=temp[i1++]; -xL^UcG0
else |wGmu&fY
data[cur]=temp[i2++]; ^:Fj+d
} F-%Hw
} -SUK[<=X
\t?rHB3"
} h8hyQd$!
*1g3,NMA
改进后的归并排序: k]9+/$
tx,q=.(
package org.rut.util.algorithm.support; rBZ0Fx$/[
W}'l8z]
import org.rut.util.algorithm.SortUtil; Mew,g:m:
U%rq(`;
/** H_FT%`iM
* @author treeroot ;C,t`(
* @since 2006-2-2 JiFB<Q\
* @version 1.0 c;.jo?RR2
*/ 4n6t(/]b<
public class ImprovedMergeSort implements SortUtil.Sort { ,C0D|q4/!.
7[ZoUWx
private static final int THRESHOLD = 10; vE&K!k`
t_w2J=2
/* Y@ X>ejk"
* (non-Javadoc) )LTX.Kg
* N^f_hL|:9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r-$VPW
*/ q0L\{
public void sort(int[] data) { *>E_lWW.
int[] temp=new int[data.length]; W:JR\KKU
mergeSort(data,temp,0,data.length-1); o'K= X E
} ([dJ'OPx$
O'h f8w
private void mergeSort(int[] data, int[] temp, int l, int r) { dF$&fo%
int i, j, k; ;e0-FF+
int mid = (l + r) / 2; &X#6jTh+
if (l == r) (Rh$0^)A
return; 2hsRYh
if ((mid - l) >= THRESHOLD) y 'Ah*h
mergeSort(data, temp, l, mid); A$70!5*
else bMB*9<c~
insertSort(data, l, mid - l + 1); <RuLIu
if ((r - mid) > THRESHOLD) {'sp8:$a
mergeSort(data, temp, mid + 1, r); %\T#Ik~3
else m\G45%m
insertSort(data, mid + 1, r - mid); #@L5yy2
1|:'jK#gE
for (i = l; i <= mid; i++) { /<1zzeHRSD
temp = data; +h@ZnFp3
} oc;4;A-;`c
for (j = 1; j <= r - mid; j++) { DdqE6qE
temp[r - j + 1] = data[j + mid]; xM=?ES
} Jk;dtLL}4
int a = temp[l]; QXEz[R
int b = temp[r]; ~rlPS#]o
for (i = l, j = r, k = l; k <= r; k++) { !GnwE
if (a < b) { g[N3jt@
data[k] = temp[i++]; TjicltQi4
a = temp; QYc/f"9
} else { W:hTRq
data[k] = temp[j--]; 2`J#)f|
b = temp[j]; lUd4`r"
} [*1:?mD$
} M)3'\x:
} )v\ A8)[
'm0_pM1:D
/** y+h/jEbM</
* @param data Yf_/c*t\5
* @param l Cd|rDa
* @param i 80K"u[
*/ |k#EYf#Y
private void insertSort(int[] data, int start, int len) { pgPm0+N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E+cx8(
} :9f 9Z7M
} hISYtNWjd"
} +2>, -V
} Cz6bD$5
.>1vN+
堆排序： ?(M$r\\
baGV]=j
package org.rut.util.algorithm.support; e5(c,,/
.|0$?w
import org.rut.util.algorithm.SortUtil; ^%O$7*
<Ok7-:OxA
/** }U?:al/m
* @author treeroot o1thGttVDg
* @since 2006-2-2 [9yd29pQ]
* @version 1.0 ; W$.>*O
*/ .E;}.X
public class HeapSort implements SortUtil.Sort{ Ld 0j!II(
`4wy *!]
/* (non-Javadoc) 0-p %.}GE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5t|$Yt[
*/ LI>Bl
public void sort(int[] data) { h{ZK;(u$
MaxHeap h=new MaxHeap(); r,q.RWuII
h.init(data); !LCy:>i!d
for(int i=0;i h.remove(); A4/gVi|
System.arraycopy(h.queue,1,data,0,data.length); >:h&5@^j$
} lQxEiDIL
bnN&E?{hF1
private static class MaxHeap{ W9]0X
*0m|`- T
void init(int[] data){ iD/+#UTY
this.queue=new int[data.length+1]; O"1HO[
for(int i=0;i queue[++size]=data; !Wj`U$];
fixUp(size); jOZ>^5}
} =&PO_t5)z
} hqV_MeHv'
@u`m6``T
private int size=0; yq!peFu
Y=,9M
private int[] queue; Gn4XVzB`O
b>]UNf"-
public int get() { r@PVSH/
return queue[1]; ?;A\>sP
} GK1P7Qy?V
=i6k[rg
public void remove() { %vbov}R
SortUtil.swap(queue,1,size--); _+Z5qUmQ
fixDown(1); !wC( ]Y
} /T2 v`Li
file://fixdown J!">L+Zcx
private void fixDown(int k) { &'Xgf!x
int j; ?v`24p3PC
while ((j = k << 1) <= size) { ilZQ/hOBH
if (j < size %26amp;%26amp; queue[j] j++; {asq[;]
if (queue[k]>queue[j]) file://不用交换 PKd'lo
break; X{:3UTBR
SortUtil.swap(queue,j,k); >h.HW
k = j; rr>6;
} K5z<n0X ~
} OTNI@jQ)
private void fixUp(int k) { @'y8* _
while (k > 1) { +pQ3bX
int j = k >> 1; A)&CI6(
if (queue[j]>queue[k]) w|NId,#f
break; 0QyL}y2
SortUtil.swap(queue,j,k); (EH}lh}%
k = j; @z:E]O}
} L uW""P/
} B~b ='jN
uMRzUK`QK
} 40z1Qkmaey
,W;|K 5
} Bn.5ivF3
\jZ)r>US"
SortUtil： ]@~%i=.7
U }I#;*F
package org.rut.util.algorithm; "p+JME(
&he:_p$x
import org.rut.util.algorithm.support.BubbleSort; xNa66A-8
import org.rut.util.algorithm.support.HeapSort; qnqS^K,':
import org.rut.util.algorithm.support.ImprovedMergeSort; Z$%!H7w
import org.rut.util.algorithm.support.ImprovedQuickSort; (W}DMcuSd
import org.rut.util.algorithm.support.InsertSort; /SyAjZ
import org.rut.util.algorithm.support.MergeSort; G<]@nP{P
import org.rut.util.algorithm.support.QuickSort; f8G<5_!K_
import org.rut.util.algorithm.support.SelectionSort; -9Ygn_M
import org.rut.util.algorithm.support.ShellSort; aj=-^iGG
/1uGsE+[
/** L(9AcP
* @author treeroot [)il_3t
* @since 2006-2-2 {s8g;yU5
* @version 1.0 s#8T46?
*/ 9<kMxtk$
public class SortUtil { ?mN!9/DIc
public final static int INSERT = 1; yo%Nz"
public final static int BUBBLE = 2; `?f<hIJoz
public final static int SELECTION = 3; M1T.
public final static int SHELL = 4; m"6K_4r]
public final static int QUICK = 5; 'I:_}q
public final static int IMPROVED_QUICK = 6; Bwu?DK
public final static int MERGE = 7; IkxoW:L
public final static int IMPROVED_MERGE = 8; `$FB[Z} &
public final static int HEAP = 9; qEVpkvEq
P+C5 s
public static void sort(int[] data) { Zv*uUe
sort(data, IMPROVED_QUICK); AYfe_Dj
} s,l*=<
private static String[] name={ BuUM~k&SY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vNdW.V}
}; P>^$X
"z=~7g
private static Sort[] impl=new Sort[]{ t:xTmK&vt
new InsertSort(), 8 qZbsZi4
new BubbleSort(), =k;X}/
new SelectionSort(), OMd:#cWsQ
new ShellSort(), (+<66 TO
new QuickSort(), 5=}CZYWB
new ImprovedQuickSort(), /LtbmV
new MergeSort(), Sz]1`%_H/
new ImprovedMergeSort(), #r1y|)m`
new HeapSort() }5}>B *
}; [Z&<# -
Zq H-]?)
public static String toString(int algorithm){ y,@yaM}-/K
return name[algorithm-1]; . ~a~(|
} h cu\c+ A
<q Q@OUI
public static void sort(int[] data, int algorithm) { E>O@Bv
impl[algorithm-1].sort(data); de[NIDA;`
} `LKf$cx(A
;%cW[*Dw
public static interface Sort { 25r3[gX9`
public void sort(int[] data); '@IReMl
} B__e*d:)!m
.9Dncsnf,`
public static void swap(int[] data, int i, int j) { N9M",(WTt}
int temp = data; Vup|*d2r0E
data = data[j]; -KfMKN~
data[j] = temp; {xTh!ih2-
} UPPlm\wb*
} WP=uHg