[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; HYYx*CJ)
} [#rdfN'?U
int i1=l; eKFc W5O
int i2=mid+1; (xSi6EZ6;
for(int cur=l;cur<=r;cur++){ 8qYGlew,
if(i1==mid+1) %b%<g%@i
data[cur]=temp[i2++]; i~s9Ot
else if(i2>r) mhkAI@)>
data[cur]=temp[i1++]; +xdFkc
else if(temp[i1] data[cur]=temp[i1++]; ,,#rv-*
else `::'UfHc
data[cur]=temp[i2++]; YM.IRj2/1
} /R$x-7t)^(
} sS2E8Z2
7(USp#"
} d8 Nh0!
O+Lb***b"
改进后的归并排序: 5b4V/d* '
. .je<
package org.rut.util.algorithm.support; H{Y=&#%d
#\S$$gP
import org.rut.util.algorithm.SortUtil; Q;,3W+(
70*iJ^|
/** U <$xp
* @author treeroot nV xMo_
* @since 2006-2-2 ^8*SCM_A
* @version 1.0 s!fY^3
*/ S9#N%{8P
public class ImprovedMergeSort implements SortUtil.Sort { [W;dguh
QOy&!6
private static final int THRESHOLD = 10; z.Kq}r^
wp GnS
/* Rf0\CEc
* (non-Javadoc) JEF7hJz~
* YM*6W?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '2J6%Gg
*/ QV7c9)<]'}
public void sort(int[] data) { o@`E.4
int[] temp=new int[data.length]; _@;3$eB
mergeSort(data,temp,0,data.length-1); XoiYtx53
} /F}\V ^
^PR,TR.
private void mergeSort(int[] data, int[] temp, int l, int r) { @ZPTf>J}
int i, j, k; k^\&.63(
int mid = (l + r) / 2; 3udIe$.Q
if (l == r) JG4*B|3
return; 8+cpNX
if ((mid - l) >= THRESHOLD) ` +UMZc
mergeSort(data, temp, l, mid); y-q?pqt
else o9d$ 4s@/
insertSort(data, l, mid - l + 1); ;Hp'x_xQ
if ((r - mid) > THRESHOLD) *vE C,)
mergeSort(data, temp, mid + 1, r); TY[d%rMm
else LU7)F,ok
insertSort(data, mid + 1, r - mid); A.x}%v,E
v]SE?xF{U
for (i = l; i <= mid; i++) { 6$<o^Ha*R
temp = data; ,fJ(.KI0
} WB[G!'
for (j = 1; j <= r - mid; j++) { YaT+BRh?
temp[r - j + 1] = data[j + mid]; 'wnY>hN
} O36r ,/X
int a = temp[l]; C|@k+^S
int b = temp[r]; Z?aR9OTP
for (i = l, j = r, k = l; k <= r; k++) { CF92AY
if (a < b) { `'.x*MNF
data[k] = temp[i++]; <n#V
a = temp; TZyQOjUu
} else { XJ/kB8
data[k] = temp[j--]; rw0lXs#K<E
b = temp[j]; d;:&3r|X
} lBZ*G
} nGgc~E$j
} A1}+j-D7!y
.FRF<_`^
/** Vzm+Ew _
* @param data h`rjDd
* @param l W&f Py%g
* @param i IX?%H!i
*/ <+,0G`
private void insertSort(int[] data, int start, int len) { VCRv(Ek
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); tsVhPo]e0
} cB=u;$k@*
} hdqls0 r
} wO)KQ~yX
} 8'Bl=C|0X
oySM?ZE
堆排序： ;rAW3
x i,wL0{
package org.rut.util.algorithm.support; ,O{ 5
2e@\6l,!^
import org.rut.util.algorithm.SortUtil; j|dzd<kE6
IqKXFORiNI
/** pv SFp-:_
* @author treeroot o`! :Q!+
* @since 2006-2-2 Fe< t@W
* @version 1.0 JlGD.!`
*/ 7]zZha4X
public class HeapSort implements SortUtil.Sort{ 5mVu]T`
F<Z=%M3e
/* (non-Javadoc) $KHDS:&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t3JPxg]0k'
*/ Y!$z7K
public void sort(int[] data) { y'/9KrV T
MaxHeap h=new MaxHeap(); )p9n|C
h.init(data); Jo+C!kc
for(int i=0;i h.remove(); 3h4"Rv=,
System.arraycopy(h.queue,1,data,0,data.length); 5D*V%v
} 1*b%C"C
*3Z#r
private static class MaxHeap{ 1V?)zp
PQ]N>'v-
void init(int[] data){ ITUl-L4xE
this.queue=new int[data.length+1]; &r!>2$B\
for(int i=0;i queue[++size]=data; Kp;o?5H
fixUp(size); jzMGRN/67
} JdEb_c3S
} =K8h)B_g
`"Pd$jW
private int size=0; z# B) b5
KrH;o)|
private int[] queue; CFxs`C^
j,jUg}b
public int get() { G[,VPC=
return queue[1]; S3cQC`^
} !iqz 4E
+?tNly`
public void remove() { CP^^ct-C
SortUtil.swap(queue,1,size--); v*v&f!Ym&s
fixDown(1); k{62UaL.
} omP7|
file://fixdown VZR6oia
private void fixDown(int k) { "&F/'';0}E
int j; Xw)+5+t"{
while ((j = k << 1) <= size) { rtz(Jt{<
if (j < size %26amp;%26amp; queue[j] j++; (@9}FHJzi
if (queue[k]>queue[j]) file://不用交换 GvY8O|a
break; [MG:Ym).2`
SortUtil.swap(queue,j,k); p9J(,}
k = j; 4esf&-gG
} %## bg<
} b-XBs7OAx
private void fixUp(int k) { H]\H'r"
while (k > 1) { uIBV1Qz
int j = k >> 1; S1JB]\
if (queue[j]>queue[k]) on|>"F`pb
break; de[_T%A
SortUtil.swap(queue,j,k); #=rI[KI
k = j; $ a7^3
} hQO~9mQ+!
} >n/QKFvV5
+H_Z!T.@
} nS#;<p$\
X8<ygci+.5
} '1aOdEZA*
0vEa]ljS
SortUtil： ;x"B ):?\
1Low[i
package org.rut.util.algorithm; z$A5p4=B'^
SBA;p7^"
import org.rut.util.algorithm.support.BubbleSort; E#OKeMK
import org.rut.util.algorithm.support.HeapSort; Z1zC@z4sUj
import org.rut.util.algorithm.support.ImprovedMergeSort; I|hG"i
import org.rut.util.algorithm.support.ImprovedQuickSort; =`")\?z}
import org.rut.util.algorithm.support.InsertSort; 42~;/4
import org.rut.util.algorithm.support.MergeSort; hLF@'ln
import org.rut.util.algorithm.support.QuickSort; LT!4pD:a
import org.rut.util.algorithm.support.SelectionSort; 'tc$#f^:
import org.rut.util.algorithm.support.ShellSort; $xqphhBg
F-t-d1w6
/** ~ lS3+H
* @author treeroot M II]sF
* @since 2006-2-2 &fWZ%C7|jC
* @version 1.0 71eD~fNdx
*/ azSS:=A
public class SortUtil { uG<+IT|x
public final static int INSERT = 1; g.'4uqU
public final static int BUBBLE = 2; #~Q0s)Ze
public final static int SELECTION = 3; KW)yTE<
public final static int SHELL = 4; VrDvd
public final static int QUICK = 5; ) Ez=#dIq
public final static int IMPROVED_QUICK = 6; zuOIos
public final static int MERGE = 7; %u#pl=k}
public final static int IMPROVED_MERGE = 8; ,}<v:!
public final static int HEAP = 9; /#HY-b
!&X}?NK
public static void sort(int[] data) { L/shF}<
sort(data, IMPROVED_QUICK); ,Tpds^
} $W)FpN;CW/
private static String[] name={ ?mMd6U&J
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7be?=c)+"
}; vwg\qKqSM
6Rso}hF}}
private static Sort[] impl=new Sort[]{ V%+KJ}S!Z
new InsertSort(), FD8aO?wvg
new BubbleSort(), E+_}8J .
new SelectionSort(), "8N]1q:$4
new ShellSort(), -?ip?[Z
new QuickSort(), 5p750`n
new ImprovedQuickSort(), dW91nTQ:
new MergeSort(), }=++Lr4*
new ImprovedMergeSort(), m{' q(w}
new HeapSort() Z#0z#M`
}; e3[N#ryt
'tOo0Zgc
public static String toString(int algorithm){ StE4n0V
return name[algorithm-1]; UJQ!~g.y]
} n1v%S"^
1m&(3%#{
public static void sort(int[] data, int algorithm) { UrgvG, Lt
impl[algorithm-1].sort(data); }/6jom9U?
} Tf+B<B:
&iuc4"'
public static interface Sort { ,Ti#g8j
public void sort(int[] data); .NabK
} U7Ps2~x3
^ c:(HUo#
public static void swap(int[] data, int i, int j) { \jC}>9
int temp = data; k38Ds_sW6d
data = data[j]; o rEo$e<
data[j] = temp; b afYjF< 3
} P /Js!e<\
} RS$e^_W