[JAVA]用Java实现的各种排序

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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; P10p<@?
} E]H
int i1=l; tC?Aso
int i2=mid+1; 1(?CNW[
for(int cur=l;cur<=r;cur++){ }^pQbFku
if(i1==mid+1) n-y^7'v
data[cur]=temp[i2++]; iijd$Tv
else if(i2>r) -?aw^du
data[cur]=temp[i1++]; "zedbJ0
else if(temp[i1] data[cur]=temp[i1++]; k>:/D
else nI*(a:
data[cur]=temp[i2++]; t?9;cS4
} i_0,BVC
} %on9C`/
9xK4!~5V
} qX p,d
1akD]Z
改进后的归并排序: YMj7
S:p.W=TAB
package org.rut.util.algorithm.support; q: Bt]2x
//X e*0
import org.rut.util.algorithm.SortUtil; E+m]aYu"
9B+ zJ Vte
/** Ej+]^t$\
* @author treeroot h\=p=M
* @since 2006-2-2 h/1nm U]
* @version 1.0 hsHVX[<5`
*/ D%jD8p
public class ImprovedMergeSort implements SortUtil.Sort { hi {2h04
_H4$$
private static final int THRESHOLD = 10; 9{O2B5u1
KH2F#[ !Lw
/* Y8J;+h9
* (non-Javadoc) HzD>-f
* QN5yBa!Wz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1H&?UP4=(
*/ `z-H]fU
public void sort(int[] data) { P~Te+ -jX}
int[] temp=new int[data.length]; *xX(!t'
mergeSort(data,temp,0,data.length-1); [+;FV!M6
} [GR]!\!%~
jh 7p62R
private void mergeSort(int[] data, int[] temp, int l, int r) { W(uP`M%][0
int i, j, k; QJM-`(
int mid = (l + r) / 2; Z:_m}Ya|
if (l == r) r/CEYEJ&X
return; U`bC>sCp
if ((mid - l) >= THRESHOLD) _W@,@hOH
mergeSort(data, temp, l, mid); fa!3/X+
else lFp!XZ!
insertSort(data, l, mid - l + 1); 1u"R=D9p,=
if ((r - mid) > THRESHOLD) c&7Do}
mergeSort(data, temp, mid + 1, r); >a&?AP #
else Y )u_nn'[
insertSort(data, mid + 1, r - mid); ?%\mQmjas
5i!V}hE
for (i = l; i <= mid; i++) { _`bS[%CJ
temp = data; QL)>/%yU
} 1DEO3p
for (j = 1; j <= r - mid; j++) { <a8#0ojm
temp[r - j + 1] = data[j + mid]; [2GXAvXsT
} M1AZ}bc0]
int a = temp[l]; :DZLjC
int b = temp[r]; ,}9f(`
for (i = l, j = r, k = l; k <= r; k++) { js:C mnI
if (a < b) { do:QH.q8)
data[k] = temp[i++]; hAV2F#
a = temp; ./"mn3U
} else { *Rz{44LP&
data[k] = temp[j--]; ,U6*kvHS6
b = temp[j]; +(;8@"u
} jd ["eI
} o"'iXUJ
} %B#hb<7}
OJMvn'y
/** R&6n?g6@/V
* @param data N4I^.k<-A
* @param l <A#5v\{.;~
* @param i G_V.H\w
*/ 9 '2=
private void insertSort(int[] data, int start, int len) { M*d-z
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -'80>[}q/
} 7<h.KZPc
} /a@ kS
} Y.DwtfE
} +VSZhg,Np8
wENzlXeOP
堆排序： \Os:6U=X-
%z(9lAe
package org.rut.util.algorithm.support; WwW"fkv
NNwc!x)*
import org.rut.util.algorithm.SortUtil; (N,nux(0k
)r ULT$;i@
/** $GQphXb$
* @author treeroot .W!tveX8-
* @since 2006-2-2 E;9Z\?P
* @version 1.0 8ou e-:/a
*/ tY{; U#9
public class HeapSort implements SortUtil.Sort{ M6# \na
'b8R#R\P
/* (non-Javadoc) KuA>"X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6dF$?I&
*/ D~Z=0yD
public void sort(int[] data) { [!^cd%l
MaxHeap h=new MaxHeap(); ows^W8-w
h.init(data); '4$lL6ly>
for(int i=0;i h.remove(); R"NGJu9
System.arraycopy(h.queue,1,data,0,data.length); >OT\~C
} LRWOBD
5!<o-{J[(=
private static class MaxHeap{ #-,g&)`]
%>i@F=O2<
void init(int[] data){ zCBplb
this.queue=new int[data.length+1]; >W'j9+Va
for(int i=0;i queue[++size]=data; rxQ<4
fixUp(size); ICk(z~D~
} WS5A Y @(~
} -<6v:Z
]K7`-p~T
private int size=0; x7f:F.
!;i*\ a
private int[] queue; 5!~!j "q
S0F@#mSQ?
public int get() { fVYiwE=F
return queue[1]; LaDY`u0G%
} 9J?W '8s5
PCtkjd
public void remove() { 3:UA<&=s
SortUtil.swap(queue,1,size--); NW)M?f+6
fixDown(1); rw&y,%2
} 5lO^;.cS,
file://fixdown %8 qSv%_
private void fixDown(int k) { t')h{2&&!2
int j; `Z:3`7c
while ((j = k << 1) <= size) { ;J'OakeVO
if (j < size %26amp;%26amp; queue[j] j++; c)03Ms4 D
if (queue[k]>queue[j]) file://不用交换 _D-5}a"
break; 3g;T?E
SortUtil.swap(queue,j,k); YX_vv!-]
k = j; A]j}'
} u)7*Rj^
} Hr6wgYPi
private void fixUp(int k) { prUHjS
while (k > 1) { 85} ii{S
int j = k >> 1; Bq *[c=(2
if (queue[j]>queue[k]) Q? qjWZY
break; xo(k?+P>.
SortUtil.swap(queue,j,k); l2(.>-#
k = j; dN<5JQql
} wk@yTTnb
} ^T{8uJ'kn
?NlSeh
} :Dayv6g
Ih()/(
} ;,dkJ7M
iOll WkF
SortUtil： [%jxf\9jJ_
FOSbe]
package org.rut.util.algorithm; ) oxIzF
QNb>rLj52
import org.rut.util.algorithm.support.BubbleSort; dhW<p5
import org.rut.util.algorithm.support.HeapSort; !_dR'
import org.rut.util.algorithm.support.ImprovedMergeSort; \dTQQ
import org.rut.util.algorithm.support.ImprovedQuickSort; OTE<x"=h
import org.rut.util.algorithm.support.InsertSort; YN^T$,*
import org.rut.util.algorithm.support.MergeSort; {S*!B
import org.rut.util.algorithm.support.QuickSort; 6Hwxx5>r
import org.rut.util.algorithm.support.SelectionSort; D M}s0O$0
import org.rut.util.algorithm.support.ShellSort; 0Z,{s158L
x<s|vgl|
/** Y9tV%
* @author treeroot XCm\z9F
* @since 2006-2-2 =-qf;5[|
* @version 1.0 q`[K3p
*/ {y b D
public class SortUtil { sQtf,e|p
public final static int INSERT = 1; 5DOE3T`^Oc
public final static int BUBBLE = 2; oIR.|=Hk{
public final static int SELECTION = 3; <BPRV> 0X
public final static int SHELL = 4; 4>YU8/Rw
public final static int QUICK = 5; ]~8v^A7u
public final static int IMPROVED_QUICK = 6; U*qNix
public final static int MERGE = 7; sMm/4AY]
public final static int IMPROVED_MERGE = 8; 7@IFp~6<qK
public final static int HEAP = 9; EE]=f=3
Q&PB]D{
public static void sort(int[] data) { MRs,l'
sort(data, IMPROVED_QUICK); sPy2/7Wqd
} xs%LRF#u
private static String[] name={ U` hfvTi
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8R}K?+]
}; qg4fR' i
72,"Cj
private static Sort[] impl=new Sort[]{ +T2HE\
new InsertSort(), Qci$YTwl>
new BubbleSort(), jTfi@5aPY
new SelectionSort(), o%`npi1y
new ShellSort(), ik5|,#}m&
new QuickSort(), LwOJ|jA(,
new ImprovedQuickSort(), > :Ze4}(
new MergeSort(), i3PKqlp.
new ImprovedMergeSort(), 2tf6GX:
new HeapSort() xnbsg!`;7W
}; N_G4_12(
QrC/ssf}
public static String toString(int algorithm){ k_?~<vTM
return name[algorithm-1]; Hbk&6kS
} FJT1i@N
_]=9#Fg7{
public static void sort(int[] data, int algorithm) { CZ3].DA|z
impl[algorithm-1].sort(data); .45^=2NGmQ
} +j[`,5oS
:Q-oV8t{
public static interface Sort { d0 -~|`5
public void sort(int[] data); HH8;J66I&
} etyCrQ ?U
c@(1:,R
public static void swap(int[] data, int i, int j) { hH`Jb77L
int temp = data; @o#+5P
data = data[j]; gvyT-XI
data[j] = temp; >'`Sf ?+|
} j[XYj6*d
} %8w9E=