[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; L*,h=#x(
} S1Od&v[R
int i1=l; /^k%sG@?
int i2=mid+1; _E'}8.#{
for(int cur=l;cur<=r;cur++){ V]+y*b.60
if(i1==mid+1) Y~{<Hs
data[cur]=temp[i2++]; %g@\SR.
else if(i2>r) +PADy8
data[cur]=temp[i1++]; %Y=r5'6l
else if(temp[i1] data[cur]=temp[i1++]; |?Edk7`
else 8OV=;aM?{
data[cur]=temp[i2++]; G6W|l2P!
} bfZt<-
} ~]d9 J
JA9NTu(
} jXALL8[c
(hZNWQ0
改进后的归并排序: :):vB
3F!)7
package org.rut.util.algorithm.support; *c/V('D/
=p=/@FN
import org.rut.util.algorithm.SortUtil; :A @f[Y'9
)[ZXPD
/** T$R#d&t
* @author treeroot VV}"zc^
* @since 2006-2-2 f+s)A(?3
* @version 1.0 _D?/$D7u#%
*/ fjy\Q
public class ImprovedMergeSort implements SortUtil.Sort { ]u$tKC
W'"?5} (
private static final int THRESHOLD = 10; h4 9q(085V
eWex/ m
/* fiA8W
* (non-Javadoc) x4wTQ$*1
* wEX<[#a-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o -)[{o\
*/ d-e/0F!
public void sort(int[] data) { G!I5Er0pdy
int[] temp=new int[data.length]; G7+{O7
mergeSort(data,temp,0,data.length-1); w+*rbJ
} G/},lUzLg
O-W[^r2e
private void mergeSort(int[] data, int[] temp, int l, int r) { !^98o:"x
int i, j, k; uM\\(g}
int mid = (l + r) / 2; tx9%.)M:n
if (l == r) tKLeq(
return; HpIi-Es7C
if ((mid - l) >= THRESHOLD) ILH[q>
mergeSort(data, temp, l, mid); 5EI"5&`*
else id : ^|
insertSort(data, l, mid - l + 1); 4~$U#$u_
if ((r - mid) > THRESHOLD) ~J+ qIZge
mergeSort(data, temp, mid + 1, r); e],(d7Jo
else RfD#/G3|
insertSort(data, mid + 1, r - mid); t g-(e=S4P
DBcR1c&<H
for (i = l; i <= mid; i++) { +4T.3Njjn
temp = data; F}meKc?a
} hrzxc4,W
for (j = 1; j <= r - mid; j++) { ^OIo
temp[r - j + 1] = data[j + mid]; ^q/^.Gf
} ,P`GIGvkA
int a = temp[l]; ^b|? ?9&
int b = temp[r]; SIR2 Kc0
for (i = l, j = r, k = l; k <= r; k++) { ~p n$'1Q
if (a < b) { MoEh25U.
data[k] = temp[i++]; Hmhsb2`\
a = temp; Y:m8UnT
} else { z2,NWmP|w
data[k] = temp[j--]; mrG?5.7W
b = temp[j]; w~crj$UM
} 8?kB+}@6X
} 1pDU}rPJ.
} :R:@V#Y
U"Bge\6x=
/** 8,vP']4r%
* @param data fSVM[
* @param l hslT49m>
* @param i lV4TFt,
*/ r1RM7y
private void insertSort(int[] data, int start, int len) { 2h*aWBLk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )T gfd5B
} 7p':a)
} . a @7
} \vc&V8
} ~~k0&mK|Q
s}` |!Vyl
堆排序： cyHbAtl
%Y'/_ esH2
package org.rut.util.algorithm.support; U*sQ5uq
S\t!7Xs%*U
import org.rut.util.algorithm.SortUtil; ebCS4&c
#EE<MKka
/** PlA#xnq#
* @author treeroot 8L/XZ)
* @since 2006-2-2 eS ?9}TG|
* @version 1.0 upk_;ae
*/ z~p!7q&g
public class HeapSort implements SortUtil.Sort{ 7^! zT
yW7>5r
/* (non-Javadoc) *,O3@,+>H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9lGa*f)
*/ tlvZy+Blv
public void sort(int[] data) { E2cZk6~m{
MaxHeap h=new MaxHeap(); ZK'WKC
h.init(data); 4s_5>r4
for(int i=0;i h.remove(); 0~WXA=XG
System.arraycopy(h.queue,1,data,0,data.length); ;WYzU`<g
} #sjGju"#_
$kmY[FWu?
private static class MaxHeap{ Rb:?%\=
knV*,
void init(int[] data){ c>/7E-T
this.queue=new int[data.length+1]; '3Fb[md54
for(int i=0;i queue[++size]=data; N:+EGmp
fixUp(size); T5T[$%]6
} T<Zi67QC@
} N z=P1&G'
v<l]K$5J&
private int size=0; AFYdBK]
]S9Z5l0
private int[] queue; :-hVbS0I
f61vE
public int get() { /.A"HGAk
return queue[1]; ZXiJ5BZ
} ' \>k7?@
*tR'K#:&g!
public void remove() { ?/sn"~"
SortUtil.swap(queue,1,size--); UEYJd&n0CB
fixDown(1); C;U4`0=8
} awz.~c++
file://fixdown 7)RvBcM
private void fixDown(int k) { OuWRLcJ!
int j; k_?OEkgUh
while ((j = k << 1) <= size) { |lzcyz
if (j < size %26amp;%26amp; queue[j] j++; a[}?!G-Wt|
if (queue[k]>queue[j]) file://不用交换 +`B^D
break; !a!4^zqp
SortUtil.swap(queue,j,k); {dE(.Z?]!#
k = j; PGYx]r
} +tg${3ti_
} Rm$(X5x>o
private void fixUp(int k) { {o*$|4q4
while (k > 1) { >MRuoJ
int j = k >> 1; r_tt~|s,>
if (queue[j]>queue[k]) 4sH?85=j
break; <KCyXU*
SortUtil.swap(queue,j,k); ubVZEsoW?
k = j; M5_t#[ [
} i 2uSPV!Tf
} P;'ZdZ(SLu
u:l<NWF^
} RwrRN+&s\
(./Iq#@S
} 8+Gwv SDU
SsfC m C
SortUtil： CMv8n@ry
DZH2U+K
package org.rut.util.algorithm; Hm|N{
P39oHW
import org.rut.util.algorithm.support.BubbleSort; "<)Jso|
import org.rut.util.algorithm.support.HeapSort; o^owv(
import org.rut.util.algorithm.support.ImprovedMergeSort; m&(qr5>b
import org.rut.util.algorithm.support.ImprovedQuickSort; pbWjTI$
import org.rut.util.algorithm.support.InsertSort; jt*B0'Sa
import org.rut.util.algorithm.support.MergeSort; q3K}2g
import org.rut.util.algorithm.support.QuickSort; mC(YO y
import org.rut.util.algorithm.support.SelectionSort; ]\}MSo3
import org.rut.util.algorithm.support.ShellSort; A =&`TfXu
(q}LirR
/** }:J-o
* @author treeroot "K+EZ%~<
* @since 2006-2-2 q68m*1?y
* @version 1.0 7<B-2g
*/ d:_;
public class SortUtil { d1 kE)R
public final static int INSERT = 1; ;/+U.I%z
public final static int BUBBLE = 2; f3>DmH#
public final static int SELECTION = 3; U.$Th_
public final static int SHELL = 4; Y5"HKW^
public final static int QUICK = 5; # M!1W5#
public final static int IMPROVED_QUICK = 6; 7+X~i@#rU
public final static int MERGE = 7; 6P,uy;PJ
public final static int IMPROVED_MERGE = 8; N:+d=G`x
public final static int HEAP = 9; `YMd0*
SdnO#J}{
public static void sort(int[] data) { BD^1V( I/
sort(data, IMPROVED_QUICK); 2vsV:LS.
} m"'`$/_
private static String[] name={ +~y>22Zfg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,LmP >Q.
}; ~0?B
6mIK[Qnp
private static Sort[] impl=new Sort[]{ PqF&[M<)
new InsertSort(), /J&DYxl":
new BubbleSort(), [9MbNJt 8~
new SelectionSort(), w $`w
new ShellSort(), ^7=7V0>,:
new QuickSort(), H5:f&m
new ImprovedQuickSort(), P46Q3EE
new MergeSort(), M1*bT@6
new ImprovedMergeSort(), %9S0!h\
new HeapSort() 2\T\p<_20
}; @tD (<*f+
m_`%#$s}
public static String toString(int algorithm){ 'lu3BQvfh
return name[algorithm-1]; )Z['=+s%
} _G25$%/LU
E7aG&K
public static void sort(int[] data, int algorithm) { n"Bc2}{
impl[algorithm-1].sort(data); :rjfAe=s
} apfr>L3
HTvUt*U1
public static interface Sort { _)~VKA]""
public void sort(int[] data); ?~yJ7~3TS<
} 5wl;fL~e
#5'& |<
public static void swap(int[] data, int i, int j) { ``6-
int temp = data; Nv6"c<(L=
data = data[j]; <dr2 bz
data[j] = temp; D&~%w!
} Vry_X2
} IvI..#EzG