[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; Kgv T"s.
} %$I;{-LD
int i1=l; 0erNc'e
int i2=mid+1; U(Zq= M
for(int cur=l;cur<=r;cur++){ 9z0p5)]n>
if(i1==mid+1) >0gW4!7Y
data[cur]=temp[i2++]; ;*N5Y}?j'
else if(i2>r) ),)lzN%!
data[cur]=temp[i1++]; >7FHo-H/T
else if(temp[i1] data[cur]=temp[i1++]; N;d] 14|
else u y+pP!<
data[cur]=temp[i2++]; /{[o~:'p
} 2/f}S?@
} ; KA~Z5x;
*#2h/Q.
} j+!v}*I![
T+$[eWk"a
改进后的归并排序: B[}6-2<>?C
H.;Q+A,8^
package org.rut.util.algorithm.support; pw#-_
ZC?Xqp
import org.rut.util.algorithm.SortUtil; n|hNM?v
9$Y=orpWxr
/** 0%B/,/PxD
* @author treeroot CAlCDfKW}
* @since 2006-2-2 3 {V>S,O3]
* @version 1.0 /efUjkP
*/ vIvIfE
public class ImprovedMergeSort implements SortUtil.Sort { "N;EL0=
=*Lfl'sr_
private static final int THRESHOLD = 10; *hrvYil2b
H+#FSdy#
/* t7pFW^&
* (non-Javadoc) C^){.UGmJ
* r^ XVB`v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jCY%|
*/ :]"V-1#}
public void sort(int[] data) { gIfh3D=yX
int[] temp=new int[data.length]; uO**E-`
mergeSort(data,temp,0,data.length-1); <%^&2UMg
} FwK]$4*
*Ly6`HZ9
private void mergeSort(int[] data, int[] temp, int l, int r) { 5(2;|I,T
int i, j, k; F{wzB
int mid = (l + r) / 2; y} '@R$
if (l == r) l}h!B_P'
return; JC"z&ka
if ((mid - l) >= THRESHOLD) eEKf|I
mergeSort(data, temp, l, mid); K:M8h{Ua
else =D(j)<9$A
insertSort(data, l, mid - l + 1); m~|40)
if ((r - mid) > THRESHOLD) 0J|3kY-n>
mergeSort(data, temp, mid + 1, r); cK@wsA^4
else <v2;p}A
insertSort(data, mid + 1, r - mid); )+^+sd
~Ei<Z`3}7"
for (i = l; i <= mid; i++) { +3gp%`c4
temp = data; =wJX0A|
} @WhHUd4s
for (j = 1; j <= r - mid; j++) { <aw[XFg
temp[r - j + 1] = data[j + mid]; !Cs_F&l"j
} qK+5NF|
int a = temp[l]; Sdo-nt
int b = temp[r]; UG^q9 :t
for (i = l, j = r, k = l; k <= r; k++) { mDWG7Asp
if (a < b) { i%/+5gq
data[k] = temp[i++]; x;S @bY
a = temp; S/ *E,))m
} else { gUlo]!$
data[k] = temp[j--]; +|v90ed
b = temp[j]; ~o(
} wkq 66?
} .}t e>]A*
} 9$t(&z=
GdwVtqbX
/** e.C)jv6qr
* @param data x2EUr,7
* @param l F [M,]?
* @param i }k0_5S
*/ siaG'%@*r
private void insertSort(int[] data, int start, int len) { Gt1U!dP
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); PCvWS.{
} !if
} <%d>v-=B
} b}f~il
} SBpL6~NW
\zY!qpX<
堆排序： O^.#d
~&T~1xsFJ
package org.rut.util.algorithm.support; \m,PA'nd/
LLo;\WGZ
import org.rut.util.algorithm.SortUtil; dG{A~Z z
g-A-kqo9
/** |>Vb9:q9Po
* @author treeroot pRqx`5 }
* @since 2006-2-2 <} .$l
* @version 1.0 m*pJBZxd
*/ w(/S?d
public class HeapSort implements SortUtil.Sort{ AdEMa}u6
2iOV/=+
/* (non-Javadoc) YVU7wW,1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \G[$:nS
*/ -@s#uA h
public void sort(int[] data) { 7r!x1
MaxHeap h=new MaxHeap(); Ey2^?
h.init(data); 'V{W-W<
for(int i=0;i h.remove(); I0-MRU~[K
System.arraycopy(h.queue,1,data,0,data.length); %{|pj +
} \<' ?8ri#
L#J1b!D&<6
private static class MaxHeap{ +R&gqja
uph(V
void init(int[] data){ *T/']t
this.queue=new int[data.length+1]; #4PN"o@
for(int i=0;i queue[++size]=data; w}KkvP^
fixUp(size); wz%-%39q%
} qna8|3eP
} Nc`L;CP
L_T5nD^D
private int size=0; )2.Si#
DI>s-7
private int[] queue; e= AKD#
yAt^;
public int get() { +whDU2 "
return queue[1]; q1,~
} fu5=k:/c
A&VG~r$
public void remove() { KPF1cJ2N
SortUtil.swap(queue,1,size--); SU0 hma8
fixDown(1); xpt:BBo
} Sc0w.5m6
file://fixdown (HVGlw'`
private void fixDown(int k) { X8|,
int j; DVA:Cmh\
while ((j = k << 1) <= size) { :> '+"M2r
if (j < size %26amp;%26amp; queue[j] j++; pP_LR ks}
if (queue[k]>queue[j]) file://不用交换 uFE)17E
break; C]6O!Pb0
SortUtil.swap(queue,j,k); )e{aN+
k = j; d6O[ @CyP
} 5O%{{J
} (>Em^(&
private void fixUp(int k) { I,tud!p`
while (k > 1) { {FkF
int j = k >> 1; kmW4:EA%
if (queue[j]>queue[k]) Y4-t7UlS;
break; vaLSH xi
SortUtil.swap(queue,j,k); *w&e\i|7
k = j; ;uJMG
} 7! Nsm
} It(_v
&yg|t5o
} V!Uc(
TOt dUO
} K1KreYlF
]kSGR
SortUtil： L0,'mS
2G7Wi!J
package org.rut.util.algorithm; COlqcq'qAu
*@5@,=d
import org.rut.util.algorithm.support.BubbleSort; ll^#JpT[S
import org.rut.util.algorithm.support.HeapSort; <I?Zk80
import org.rut.util.algorithm.support.ImprovedMergeSort; -RwE%cr
import org.rut.util.algorithm.support.ImprovedQuickSort; 1zv'.uu.,
import org.rut.util.algorithm.support.InsertSort; :;}P*T*PU
import org.rut.util.algorithm.support.MergeSort; ?}oFg#m-<L
import org.rut.util.algorithm.support.QuickSort; `?]k{ l1R
import org.rut.util.algorithm.support.SelectionSort; 9{l}bu/u
import org.rut.util.algorithm.support.ShellSort; dPlV>IM$z
T)/eeZ$
/** FPz9N@M%Q
* @author treeroot FrS]|=LJhX
* @since 2006-2-2 Ui~>SN>s
* @version 1.0 1}x%%RD_
*/ K?;DMUSY\
public class SortUtil { afVT~Sf{
public final static int INSERT = 1; +(Ae4{z"1+
public final static int BUBBLE = 2; +7Gwg
public final static int SELECTION = 3; u`W2+S
public final static int SHELL = 4; SUiOJ[5,
public final static int QUICK = 5; [txE .7p
public final static int IMPROVED_QUICK = 6; j#|ZP-=1_
public final static int MERGE = 7; -@'FW*b
public final static int IMPROVED_MERGE = 8; Lbgi7|&
public final static int HEAP = 9; .v K-LHs
pK*TE5]
public static void sort(int[] data) { 1EK*g;H
sort(data, IMPROVED_QUICK); c 9Mz]1@f
} ?uu*L6
private static String[] name={ aE8VZ8tvq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Dt@SqX:~Ee
}; Nn6%9PX_)
kiEa<-]
private static Sort[] impl=new Sort[]{ {7[Ox<Ho
new InsertSort(), N2G{<>=
new BubbleSort(), $'vU2L
new SelectionSort(), F9PxSk_\9
new ShellSort(), V~GDPJ+
new QuickSort(), /~1+i'7V.,
new ImprovedQuickSort(), llq<egZpm
new MergeSort(), dysS9a,
new ImprovedMergeSort(), %9"H
new HeapSort() [Xkx_B
}; _a, s )
,1`z"7\W
public static String toString(int algorithm){ \fOEqe*5SM
return name[algorithm-1]; vx =&QavL
} #!=tDc &
VbYdZCC
public static void sort(int[] data, int algorithm) { )%TmAaj9d
impl[algorithm-1].sort(data); F,kZU$
} 8*X4\3:*N
zLQx%Yg!
public static interface Sort { }MySaL>
public void sort(int[] data); w0. u\
} +{]j]OP
k$VlfQ'+
public static void swap(int[] data, int i, int j) { ]Ljf?tk
int temp = data; %d@z39-;
data = data[j]; [),ige
data[j] = temp; C!gZN9-
} F|8&
} Py<}S-: