[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; >0I\w$L
} :6W* ;<o
int i1=l; >{#QS"J#
int i2=mid+1; y-o54e$4Cq
for(int cur=l;cur<=r;cur++){ k Hh0&~(
if(i1==mid+1) ^Dys#^
data[cur]=temp[i2++]; ]gmkajCzD
else if(i2>r) xd^9R<
data[cur]=temp[i1++]; og|~:>FmJo
else if(temp[i1] data[cur]=temp[i1++]; o<!tNOH
else dA$qzQ
data[cur]=temp[i2++]; cB}6{c$_sW
} H`NT`BE
} Vn6]h|vm
!p(N DQm
} Ky)*6QOw
iTJE:[W"y
改进后的归并排序: vSGvv43G
S0tPnwco[~
package org.rut.util.algorithm.support; B q7Qbj
g UA_&_
import org.rut.util.algorithm.SortUtil; [u7i)fn5?
W.TdhJW9
/** "sUmke-#
* @author treeroot y\<\P8X
* @since 2006-2-2 Og(|bs!6
* @version 1.0 U$j?2|v-x
*/ B#[.c$
public class ImprovedMergeSort implements SortUtil.Sort { BS+=*3J
"ac$S9@~
private static final int THRESHOLD = 10; @fI2ZWN|
QP!0I01
/* >npFg@A
* (non-Javadoc) '))=y@M
* zN,2 (v"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SsQg8d
*/ `h$^=84
public void sort(int[] data) { l6< bV#_qe
int[] temp=new int[data.length]; h|[oQ8)
mergeSort(data,temp,0,data.length-1); @tPptB
} ] F2{:RW
yn.f?[G2
private void mergeSort(int[] data, int[] temp, int l, int r) { fi';Mb3B3
int i, j, k; 48n7<M;I
int mid = (l + r) / 2; BVv{:m{w
if (l == r) '"J``=
return; RV_+-m{]
if ((mid - l) >= THRESHOLD) i" >kF@]c8
mergeSort(data, temp, l, mid); j~k+d$a
else yIma7H@=L
insertSort(data, l, mid - l + 1); S3> <zGYk
if ((r - mid) > THRESHOLD) $;B0x
mergeSort(data, temp, mid + 1, r); !s(s^
else \Culf'iX
insertSort(data, mid + 1, r - mid); .@3bz
9AHxa
for (i = l; i <= mid; i++) { Ae>:i7.V
temp = data; x^/453Lk
} ?m dGMf)
for (j = 1; j <= r - mid; j++) { 5ii:93Hlj
temp[r - j + 1] = data[j + mid]; #iP5@:!Wm~
} KU (g Zy
int a = temp[l]; 5DnX8t+d
int b = temp[r]; poVtg}n
for (i = l, j = r, k = l; k <= r; k++) { ljJR7<
if (a < b) { JId|LHf*P
data[k] = temp[i++]; UGK,+FN
a = temp; oE'Flc.
} else { =x}p>#o,J
data[k] = temp[j--]; Qi\"b
b = temp[j]; )UAkg
} ZA'Qw2fF0
} )(l=_[1Z5
} ~?uch8H
m-XS_5x\
/** Vv3:x1S
* @param data =;y(b~
* @param l xaW9Sj0ZM
* @param i Qs;MEt1
*/ QLOcgU^
private void insertSort(int[] data, int start, int len) { Q'Vejz/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [.c'22R6
} AMc`qh
} XcM.<Dn3
} C^nTLw;K
} ($[)Tcq*~
s.XLC43Rs
堆排序： |oV_7%mlu
9O\N K:2
package org.rut.util.algorithm.support; )9z3T>QW
.|<+-Rsj
import org.rut.util.algorithm.SortUtil; _X]S`e1F
|ZJ<N\\h-
/** ?qR11A};tG
* @author treeroot 'uU{.bq
* @since 2006-2-2 _e94
* @version 1.0 41NVF_R6J
*/ %mMPALN]{
public class HeapSort implements SortUtil.Sort{ w}r~Wk^dLI
6;#Rd|
/* (non-Javadoc) x$=""?dd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m!_*Q
*/ A7=k9|
public void sort(int[] data) { <K GYwLk
MaxHeap h=new MaxHeap(); d{:0R9
h.init(data); &~#y-o"
for(int i=0;i h.remove(); o6A1;e
System.arraycopy(h.queue,1,data,0,data.length); -9~WtTaV.H
} EN{o3@ O'
lq}g*ih
private static class MaxHeap{ M*7:-Tb]C
HAc1w]{(
void init(int[] data){ Bd>a"3fA
this.queue=new int[data.length+1]; p5JRG2zt
for(int i=0;i queue[++size]=data; w^8i!jCy
fixUp(size); GLr7sack
} (V9 ;
} b?nORWjC
^2-t|E=
private int size=0; t$-!1jq
,8Q&X~$rY
private int[] queue; OGAC[s~V
B8.uzX'p
public int get() { 6uKS!\EY|
return queue[1]; ;cp,d~mrf
} $&jte_hv
p@iU9K\,
public void remove() { ^]ig*oS\`
SortUtil.swap(queue,1,size--); "]ZDs^7
fixDown(1); :FX|9h
} O7lFg;9c`
file://fixdown a+PVi
private void fixDown(int k) { K| '`w.
int j; W+u-M>Cj6
while ((j = k << 1) <= size) { Y[Eq;a132
if (j < size %26amp;%26amp; queue[j] j++; IHcR/\mz
if (queue[k]>queue[j]) file://不用交换 Ucd~-D
break; Qkb=KS%z
SortUtil.swap(queue,j,k); ^b^}6L'Z
k = j; ]1&}L^a
} 9N V.<&~
} p d(W(-`8!
private void fixUp(int k) { oxXCf%!
while (k > 1) { R(on[g_1
int j = k >> 1; ,f^ICM
if (queue[j]>queue[k]) rWNywxnT
break; osZ]R
SortUtil.swap(queue,j,k); 5Sx.'o$
k = j; l' 2C/#8F
} tzrvIVD
} V2LvE.Kj
}0idFotck
} |ZtNCB5{^j
rceX|i>9n
} ciGJtD&P
Js/QL=,
SortUtil： )>I-j$%=2
W.Z`kH *B
package org.rut.util.algorithm; U6F1QLSLz
Cxra(!&
import org.rut.util.algorithm.support.BubbleSort; "?ON0u9
import org.rut.util.algorithm.support.HeapSort; 5%RiM|+
import org.rut.util.algorithm.support.ImprovedMergeSort; tQ(4UHqa~
import org.rut.util.algorithm.support.ImprovedQuickSort; v:?l C<,
import org.rut.util.algorithm.support.InsertSort; ug^esB
import org.rut.util.algorithm.support.MergeSort; S<eB&qT$
import org.rut.util.algorithm.support.QuickSort; 1:22y:^j
import org.rut.util.algorithm.support.SelectionSort; 52t6_!y+V
import org.rut.util.algorithm.support.ShellSort; *cAI gO7
RZP7h>y6@
/** Kjt\A]R%
* @author treeroot +0g L!r
* @since 2006-2-2 tR(nD UHV5
* @version 1.0 ~Xz?H=}U+
*/ 9nSfFGu
public class SortUtil { bk:mk[
public final static int INSERT = 1; KvXFzx|A
public final static int BUBBLE = 2; -;*lcY*
public final static int SELECTION = 3; k8z1AP
public final static int SHELL = 4; -{A*`.[v
public final static int QUICK = 5; +aOQ'*g
public final static int IMPROVED_QUICK = 6; p} {H%L
public final static int MERGE = 7; f"SK3hI$p
public final static int IMPROVED_MERGE = 8; K/M2L&C
public final static int HEAP = 9; A\<W x/
|dhKeg_
public static void sort(int[] data) { Ui.S)\B
sort(data, IMPROVED_QUICK); sW@_' Lw
} n&3}F?
private static String[] name={ c3.;o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?OS0.
}; a'(B}B=h
Vrs?VA`v$
private static Sort[] impl=new Sort[]{ S?#6{rx
new InsertSort(), v1z d[jqk
new BubbleSort(), %rJ'DPs
new SelectionSort(), GA;h7
new ShellSort(), 7=gcdfW,;x
new QuickSort(), +`tk LvM
new ImprovedQuickSort(), Q)im2o@z
new MergeSort(), |enb5b78
new ImprovedMergeSort(), zPN:)
new HeapSort() VS@e[,
}; %~L"TK`?
yMXf&$C
public static String toString(int algorithm){ u9fJ:a
return name[algorithm-1]; y/+IPR
} qP]1}-
FG^lh
public static void sort(int[] data, int algorithm) { sE&1ZJ]7
impl[algorithm-1].sort(data); </2 aQn
} O L 9(~p
" =6kH,
public static interface Sort { nJ h)iQu
public void sort(int[] data); Xw3j(`w$,
} a|#TnSk
9{ #5~WP
public static void swap(int[] data, int i, int j) { N&^zXY
int temp = data; p<3<Zk 7~0
data = data[j]; aa"3 Io
data[j] = temp; A9;,y'm^8
} pQ>|dH+.
} OX%#8Lx