[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; Dcq\1V.e`W
} <D4.kM
int i1=l; ik77i?Hg
int i2=mid+1; !ec\8Tj
for(int cur=l;cur<=r;cur++){ jYet!l
if(i1==mid+1) &%`IPhbT
data[cur]=temp[i2++]; d{@X-4k:
else if(i2>r) Rx*T7*xg{
data[cur]=temp[i1++]; L=Q-r[
else if(temp[i1] data[cur]=temp[i1++]; z]> 0A
else ,ijgqEN
data[cur]=temp[i2++]; W$@q ~/E
} *usfJ-
} _JA.~edqM
\Nu(+G?e
} gM20n^
2As 4}
改进后的归并排序: W|3XD-v@
qtTys gv
package org.rut.util.algorithm.support; '8~7Ru\KyX
NjVuwIm+
import org.rut.util.algorithm.SortUtil; 3uCC_Am
ZGa>^k[:
/** -<a~kVv
* @author treeroot YMwMaU)K,
* @since 2006-2-2 eMVfv=&L<3
* @version 1.0 b&A+`d
*/ Xvm.Un<N
public class ImprovedMergeSort implements SortUtil.Sort { K IiVz<
OB8fFd
private static final int THRESHOLD = 10; 'MPt K
8zGe5Dn9
/* HFBGM\R02
* (non-Javadoc) "/6(
* X%xX3e'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ; )O)\__"-
*/ B=#rp*vwL
public void sort(int[] data) { X3I\O,"I
int[] temp=new int[data.length]; T5&jpP`M
mergeSort(data,temp,0,data.length-1); Eu\&}n`i
} @#1k+tSA,
|cJyP9}n
private void mergeSort(int[] data, int[] temp, int l, int r) { [[QrGJr
int i, j, k; _wKFT>
int mid = (l + r) / 2; [kgT"?w=
if (l == r) Q <EFd
return; +O}6 8N
if ((mid - l) >= THRESHOLD) w`,[w,t
mergeSort(data, temp, l, mid); FZz\zp
else )MLOYX
insertSort(data, l, mid - l + 1); D,dmlv
if ((r - mid) > THRESHOLD) s d>&6R^
mergeSort(data, temp, mid + 1, r); kg7oH.0E
else g/W<;o<v(I
insertSort(data, mid + 1, r - mid); KP[ax2!x
m;lwMrY\7>
for (i = l; i <= mid; i++) { U;:>vi3p
temp = data; 07Yh
} |]HU$GtS
for (j = 1; j <= r - mid; j++) { V{@<Z8sW#
temp[r - j + 1] = data[j + mid]; j/{F#auI
} {LbNKjn
int a = temp[l]; fzRzkn:=
int b = temp[r]; tQbDP!,A*=
for (i = l, j = r, k = l; k <= r; k++) { ?C//UN;
if (a < b) { MftW^7W-
data[k] = temp[i++]; {bl&r?[y
a = temp; ^6mlE+WY
} else { Xdsd5 UUM
data[k] = temp[j--]; |dpOE<f[
b = temp[j]; VjSb>k
} K0yTHX?(.
} rv1kIc5Za<
} 2J^6(vk
U5z^R>k
/** y. @7aT5
* @param data (EIdw\
* @param l o8BbSZVu
* @param i "2)<'4q5)
*/ RtGETiA\b
private void insertSort(int[] data, int start, int len) { 'N)&;ADx-G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cfMj^*I
} uI@:\Rss
} FEw51a+V
} 5Jd&3pO
} FAJ\9
4\x'$G
堆排序： :Sk0?WU
rJ]iJ0[I
package org.rut.util.algorithm.support; R8F[ 7&(
Y2!OJuyGc
import org.rut.util.algorithm.SortUtil; 5Az=)q4Q
uJA8PfbD
/** `MlQPLH
* @author treeroot kB_GL>fc
* @since 2006-2-2 (]^9>3{|
* @version 1.0 $)vljM<<
*/ FF6[qSV
public class HeapSort implements SortUtil.Sort{ |8c3%jve
wo$9$~(
/* (non-Javadoc) +'2Mj|d@p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gpVZZ:~
*/ Yvs)H'n=
public void sort(int[] data) { *oL?R2#7
MaxHeap h=new MaxHeap(); vXLiYWo
h.init(data); 63QMv[`,
for(int i=0;i h.remove(); v#@"Evh7
System.arraycopy(h.queue,1,data,0,data.length); [!,&A{.!
} c<wsWs 4V
r#JE7uneT
private static class MaxHeap{ )9 5&-Hs
{'E%SIRZ)
void init(int[] data){ 1T!b#x4
this.queue=new int[data.length+1]; 2HoTj|
for(int i=0;i queue[++size]=data; tm@&f
fixUp(size); L TZ3r/
} [0El z@.C
} WW\u}z.QJ
=LDzZ:' X
private int size=0; @ U'g}K
G`9Ud
private int[] queue; *?Nrx=O*
MzL^u8
public int get() { |)* K#%j
return queue[1]; f)l:^/WP+
} w&hgJ
Q4Zuz)r*
public void remove() { @AaM]?=P{
SortUtil.swap(queue,1,size--); bdZ[`uMD
fixDown(1); >A|(mc
} YD H!Nl
file://fixdown *9y)B|P^
private void fixDown(int k) { #wK {G)J
int j; vP`Sz}FU
while ((j = k << 1) <= size) { a$yAF4HR<
if (j < size %26amp;%26amp; queue[j] j++; aTuD|s
if (queue[k]>queue[j]) file://不用交换 9u^PM
break; ~m8".Z"
SortUtil.swap(queue,j,k); ? [l[y$9
k = j; 6X~.J4
} z85%2Apd
} juG?kL.
private void fixUp(int k) { }pdn-#
while (k > 1) { H<#M)8
int j = k >> 1; bGOOC?[UX
if (queue[j]>queue[k]) /W1!mih
break; t6m3lq{
SortUtil.swap(queue,j,k); Bha#=>4FU
k = j; '#!nK O2<
} K'%2'd
} zsFzF`[k
xHq"1Vs=
} U(P^-J<n1
FkY}6
} X]8(_[Y
"s]r"(MX
SortUtil： T\I}s"d
z`$jxSLm
package org.rut.util.algorithm; v_mk{
`)%zk W
import org.rut.util.algorithm.support.BubbleSort; fqrQ1{%UH
import org.rut.util.algorithm.support.HeapSort; -}Zck1
import org.rut.util.algorithm.support.ImprovedMergeSort; )UbPG`x8
import org.rut.util.algorithm.support.ImprovedQuickSort; O42`Z9oK
import org.rut.util.algorithm.support.InsertSort; JJ_b{ao<
import org.rut.util.algorithm.support.MergeSort; G%^jgr)
import org.rut.util.algorithm.support.QuickSort; 94VtGg=b}
import org.rut.util.algorithm.support.SelectionSort; J{;XNf =
import org.rut.util.algorithm.support.ShellSort; KBE3q)
.2"-N5Z
/** ?lq
* @author treeroot B|pO2de
* @since 2006-2-2 5;'(^z-bL
* @version 1.0 VzfaUAIZl
*/ h ` qlI1]
public class SortUtil { fh_+M"Y0`
public final static int INSERT = 1; 'yxN1JF
public final static int BUBBLE = 2; O+x"c3@Z)D
public final static int SELECTION = 3; -]el_:H
public final static int SHELL = 4; jq%%|J.x
public final static int QUICK = 5; '&hz*yk
public final static int IMPROVED_QUICK = 6; Ak3cE_*Y/
public final static int MERGE = 7; %O6r
public final static int IMPROVED_MERGE = 8; LNp{lC
public final static int HEAP = 9; g)$/'RB
\]C_ul'
public static void sort(int[] data) { "uCO?hv0
sort(data, IMPROVED_QUICK); -Vg(aD
} [wU e"{
private static String[] name={ ,ZGU\t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Hb}O/G$a*
}; fF6bEJl3
/]j^a:#"6t
private static Sort[] impl=new Sort[]{ Ov8^6O
new InsertSort(), QN47+)cVt"
new BubbleSort(), Vu.VH([b]Q
new SelectionSort(), &O +?#3
new ShellSort(), OQW%nF9~
new QuickSort(), Kzwbr?&z
new ImprovedQuickSort(), a+'k#m
new MergeSort(), n*A?>NV
new ImprovedMergeSort(), 37apOK4+
new HeapSort() #($~e|
}; r{>Q{$Q
UE9RrfdN
public static String toString(int algorithm){ E{;F4wT_@
return name[algorithm-1]; v[;R(pt?
} ) >;7"v
I~T
public static void sort(int[] data, int algorithm) { IiU\}<O
impl[algorithm-1].sort(data); EfX\"y
} e!W U
"C0?s7Y
public static interface Sort { wZ4w`|'
public void sort(int[] data); 9|D*}OY>
} e5RF6roxO
I(<9e"1O
public static void swap(int[] data, int i, int j) { Az7 ]qb
int temp = data; :@uIEvD?
data = data[j]; {W+IUvn
data[j] = temp; vf&_ N
} RW{y.WhB
} U$yy7}g