[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; m(]IxI
} \,t<{p_Q
int i1=l; SXF_)1QO\W
int i2=mid+1; !}48;Pl
for(int cur=l;cur<=r;cur++){ L#bQ`t
if(i1==mid+1) ay[*b_f
data[cur]=temp[i2++]; M&-/&>n!
else if(i2>r) "A3xX&9-q
data[cur]=temp[i1++]; bUL9*{>G
else if(temp[i1] data[cur]=temp[i1++]; Ux]@prAq
else 1yc@q8
data[cur]=temp[i2++]; >ON.ftZi
} &$im^0`r_
} :N:8O^D^<
DlO;EH
} (LPD
5nb6k,+E
改进后的归并排序: 6[7k}9`alz
IQv>{h}
package org.rut.util.algorithm.support; o)WSMV(&f
pSUp"wch
import org.rut.util.algorithm.SortUtil; ZK*aVYnu
n/D]r
/** 4tTJE<y
* @author treeroot z|H>jit+
* @since 2006-2-2 h]9^bX__Z
* @version 1.0 &|] ^ u/
*/ ^q2zqC
public class ImprovedMergeSort implements SortUtil.Sort { ywte\}
A[a+,TN{
private static final int THRESHOLD = 10; P://Zi6>
??Ac=K\
/* 1^dWmxUZH
* (non-Javadoc) ;O>fy:$'
* lNAHn<ht
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WQ`T'k#ESW
*/ i(rY'o2 BN
public void sort(int[] data) { KR0 x[#.*
int[] temp=new int[data.length]; %Ski5q
mergeSort(data,temp,0,data.length-1); L\DaZ(Y
} < Ifnf6~
" z{w^k
private void mergeSort(int[] data, int[] temp, int l, int r) { _r'M^=yx[
int i, j, k; 3J<,2
int mid = (l + r) / 2; ,iUx'U
if (l == r) 4pv:u:Z
return; &.B6P|N'
if ((mid - l) >= THRESHOLD) q5PYc.E([
mergeSort(data, temp, l, mid); 8?XZF[D
else X.<R['U&\
insertSort(data, l, mid - l + 1); l[k$O$jo
if ((r - mid) > THRESHOLD) :B~c>:
mergeSort(data, temp, mid + 1, r); '"^JNb^I
else Jmx}r,j
insertSort(data, mid + 1, r - mid); lX3h'h
pM3BBF%
for (i = l; i <= mid; i++) { 2oLa`33c1
temp = data; |&7,g
} Ea?.HRxl
for (j = 1; j <= r - mid; j++) { Ags`%(
temp[r - j + 1] = data[j + mid]; <&iBR
} (z7#KJ1+Aw
int a = temp[l]; *_wBV M=2
int b = temp[r]; :_*Q IyW
for (i = l, j = r, k = l; k <= r; k++) { 4fswx@l
if (a < b) { Pa<X^&
data[k] = temp[i++]; lH.2H
a = temp; _(foJRr
} else { flqTx)xE
data[k] = temp[j--]; 5@ug1F&
b = temp[j]; X$f%Ss
} %3j5Q
} )VC) }
} PQ>JoRs
$'q(Z@
/** nCU4a1rZ
* @param data L_,U*Jyo
* @param l jLSZ#H
* @param i hLRQ)
*/ Z]<_a)>
private void insertSort(int[] data, int start, int len) { <h({+N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L%FL{G
} #ZA YP
} 30@ GFaab
} ^dqEOW
} 9&cZIP
[@6iStRg7
堆排序： }^muAr
e^yB9b
package org.rut.util.algorithm.support; jxvVp*-=<j
nP^$p C
import org.rut.util.algorithm.SortUtil; HdM;c*K
%:*HzYf
/** 32yNEP{
* @author treeroot eORt qX8*
* @since 2006-2-2 _q 8m$4
* @version 1.0 K@m^QioMj
*/ N"TD$NrK\
public class HeapSort implements SortUtil.Sort{ '#PT C,0UJ
uZ+<
/* (non-Javadoc) zlfm})+G
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1*fA>v
*/ 2olim1
public void sort(int[] data) { 9[`6f8S_$
MaxHeap h=new MaxHeap(); N!AFsWV
h.init(data); ;Peyo1
for(int i=0;i h.remove(); '&d4xc
System.arraycopy(h.queue,1,data,0,data.length); Y~Rwsx
} =>G A_
PO&`rr
private static class MaxHeap{ f@0`,
c,@6MeKHq
void init(int[] data){ v,;?+Ck
this.queue=new int[data.length+1]; duI8^&|
for(int i=0;i queue[++size]=data; \cG'3\GI
fixUp(size); \1ZfSc
} qb Q> z+c
} )n.peZ
k;sUDmrO
private int size=0; =u(fP" |{
>KE(%9y~
private int[] queue; 7u zN/LAF
xk/(|f{L
public int get() { >L%%B-
return queue[1]; DxlX-
} {)mlXo(On
,O}zgf*H;
public void remove() { b7-a0zaN
SortUtil.swap(queue,1,size--); )l=j,4nn
fixDown(1); -8IiQRS
} v,jU9D\
file://fixdown J?&9ofj&
private void fixDown(int k) { r$KDNa$/a
int j; xInWcQ
while ((j = k << 1) <= size) { mWh:,[o
if (j < size %26amp;%26amp; queue[j] j++; `JRdOe
if (queue[k]>queue[j]) file://不用交换 CVm*Q[5s"
break; R:Lu)d>=
SortUtil.swap(queue,j,k); Yr+&|;DB
k = j; n#*cVB81
} f =Nm2(e
} MYjCxy-;A
private void fixUp(int k) { O%Mh g\#B
while (k > 1) { n3(HA
int j = k >> 1; fc91D]c
if (queue[j]>queue[k]) 6vDgMfw
break; E~B LY{3:
SortUtil.swap(queue,j,k); KnuqU2< {
k = j; SC#
} Vh&uSi1V
} 99`xY$
c0@v`-9
} 344- ~i*
Px<;-H`
} %\A~w3E
?1YK-T@
SortUtil： Q8_d]V=X:
Q-\: u~
package org.rut.util.algorithm; #u~8Txt
'>Z Ou3>
import org.rut.util.algorithm.support.BubbleSort; Q]8r72uSk
import org.rut.util.algorithm.support.HeapSort; OA_ %%A;o
import org.rut.util.algorithm.support.ImprovedMergeSort; 8W{R&Z7aL
import org.rut.util.algorithm.support.ImprovedQuickSort; &:rf80`z.
import org.rut.util.algorithm.support.InsertSort; EB\\ F
import org.rut.util.algorithm.support.MergeSort; F J)la9
import org.rut.util.algorithm.support.QuickSort; O?@AnkOhn
import org.rut.util.algorithm.support.SelectionSort; s^cHR1^
import org.rut.util.algorithm.support.ShellSort; [8ih-k
o.,hCg)X
/** 8O]$)E
* @author treeroot |q?A8@\u
* @since 2006-2-2 ^W^%PJD|
* @version 1.0 >B==*,|
*/ b<%6aRC\
public class SortUtil { #}.db?[Rv
public final static int INSERT = 1; dP82bk/e
public final static int BUBBLE = 2; C[75!F
public final static int SELECTION = 3; 1'ZBtX~A
public final static int SHELL = 4; &a V`u?'e
public final static int QUICK = 5; TV}H
public final static int IMPROVED_QUICK = 6; bFcI\Q{4
public final static int MERGE = 7; !(/dbHB
public final static int IMPROVED_MERGE = 8; \Q]7Hw<
public final static int HEAP = 9; N*eZ4s'
p &A3l
public static void sort(int[] data) { [L:,A{rve
sort(data, IMPROVED_QUICK); ,+WDa%R
} oYW:ptJ
private static String[] name={ HJDM\j*5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )gZ yW
}; WHL@]^E@m
qTG/7tn "
private static Sort[] impl=new Sort[]{ \j4TDCs_[
new InsertSort(), &U:;jlST9
new BubbleSort(), $aEL>,X
new SelectionSort(), \]zHM.E1
new ShellSort(), u-D%: lz85
new QuickSort(), 8< R#}
new ImprovedQuickSort(), W_%Dg]l
new MergeSort(), 6:H@=fEv
new ImprovedMergeSort(), %5'6^bT
new HeapSort() tks1*I$S<
}; &4LrV+`$V
yTv#T(of
public static String toString(int algorithm){ Bx)4BPaN
return name[algorithm-1]; opd^|xx0
} ?e0ljx;
F&^u1RYz
public static void sort(int[] data, int algorithm) { vLq_l4l
impl[algorithm-1].sort(data); (<|,LagTuc
} 3:s!0ty"
G22u+ua
public static interface Sort { 'vBuQinn
public void sort(int[] data); o^mW`g8[
} #>}cuC@
t~3!| @3i
public static void swap(int[] data, int i, int j) { k*J0K=U|
int temp = data; d-y8c
data = data[j]; V!uW\i/
data[j] = temp; nGq{+ G
} O|d"0P
} ;tlvf?0!