[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; ru/zLj:
} ;D"P9b]9$
int i1=l; Da8$Is;n
int i2=mid+1; R%N#G<^R
for(int cur=l;cur<=r;cur++){ Ag#5.,B-
if(i1==mid+1) CDW(qq-zD
data[cur]=temp[i2++]; 'RV\}gqZ
else if(i2>r) ).+xcv
data[cur]=temp[i1++]; k]$E8[.t
else if(temp[i1] data[cur]=temp[i1++]; "UoCT7X
else r,.95@
data[cur]=temp[i2++]; a&s"#j
} }8V;s-1
} x-V' 0-#U>
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} fteyG$-s
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改进后的归并排序: _N,KHxsG8B
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package org.rut.util.algorithm.support; &Qq/Xi,bZ
;sL6#Go?V
import org.rut.util.algorithm.SortUtil; Sa[EnC
"`jZ(+
/** N t>HztXd
* @author treeroot G{:af:5Fo
* @since 2006-2-2 v;bM.OL
* @version 1.0 1RI#kti-"
*/ \9>g;qPg}
public class ImprovedMergeSort implements SortUtil.Sort { o^_W$4Fc
XgiI6-B~
private static final int THRESHOLD = 10; 3d#9Wyxs
"lU]tIpCu
/* OP|.I._I
* (non-Javadoc) iC\rhHKQ
* KM_)7?`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Gh$y#0qr
*/ L_ Xn,
public void sort(int[] data) { ]s*[Lib
int[] temp=new int[data.length]; ~51kiQW
mergeSort(data,temp,0,data.length-1); A{i][1N
} Imh2~rw;
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private void mergeSort(int[] data, int[] temp, int l, int r) { Io,/ +#|
int i, j, k; =e-a&Ep-z
int mid = (l + r) / 2; H#kAm!H
if (l == r) u:AfHZ
return; HC9vc,Fp
if ((mid - l) >= THRESHOLD) x%IXwP0
mergeSort(data, temp, l, mid); k Z+q
else @wYQLZ
insertSort(data, l, mid - l + 1); _ bXVg3oDt
if ((r - mid) > THRESHOLD) +?"HTDBE||
mergeSort(data, temp, mid + 1, r); ~>N`<S
else .*RB~c t
insertSort(data, mid + 1, r - mid); nJldz;
j{Yt70Wv
for (i = l; i <= mid; i++) { r+[#%%}ea
temp = data; DU/9/ I?~
} c]s(u+i
for (j = 1; j <= r - mid; j++) { 5(iSOsb
temp[r - j + 1] = data[j + mid]; f"ZqA'KB#
} K)Df}fVOc
int a = temp[l]; *tTP8ZCQ[
int b = temp[r]; r!=]Q}`F
for (i = l, j = r, k = l; k <= r; k++) { p~Yy"Ec;p
if (a < b) { Vr&el
data[k] = temp[i++]; 3JlC/v#0
a = temp; P;)2*:--)
} else { G zJ9N`
data[k] = temp[j--]; }"%!(rx
b = temp[j]; /32Ta
} Kf:2%_DB
} L<f-Ed9|
} yM(_P0
D:YN_J"kV
/** Ap F*a$),
* @param data \b_-mnN"
* @param l 7%:??*"~
* @param i jHkyF`<+
*/ SKB@
private void insertSort(int[] data, int start, int len) { v?Z'[l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x\Nhix}1D
} g)=V#Bglv
} &q," !:L]
} 0=N4O!X9
} HO266M
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堆排序： J>f /u:.
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package org.rut.util.algorithm.support; ]}nu9z<
4ggVj*{v
import org.rut.util.algorithm.SortUtil; S[-.tvI;Q
2.StG(Y!
/** ggrI>vaw
* @author treeroot C$KaT3I
* @since 2006-2-2 )v${&H
* @version 1.0 euRCBzc
*/ Tx y]"_
public class HeapSort implements SortUtil.Sort{ \1=T sU&^
D"`%|`O
/* (non-Javadoc) .[edln
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5|yZEwq
*/ LTg?5GwD\j
public void sort(int[] data) { <2n'}&F
MaxHeap h=new MaxHeap(); &(lMm)
h.init(data); Q<z)q<e
for(int i=0;i h.remove(); ^bF}_CSE
System.arraycopy(h.queue,1,data,0,data.length); 08`f7[JQo]
} ]MC/t5vCu
=ft9T&ciD
private static class MaxHeap{ }phz7N9
BfX%|CWh
void init(int[] data){ YavfjS:2
this.queue=new int[data.length+1]; ^/G?QR
for(int i=0;i queue[++size]=data; gs$3)t
fixUp(size); jjxIS
} eT;AAGql
} [fd~nD#.
*hV4[=
private int size=0; OMl8 a B9
fwRGT|":B
private int[] queue; LOe4c0C6Ca
#g,H("Qy({
public int get() { $Xf~# uH
return queue[1]; SO7(K5H,
} P<8LAc$T
O2C6V>Q;
public void remove() { L+_8QK<
SortUtil.swap(queue,1,size--); bC6X?m=
fixDown(1); g .3f2w
} aWdUuid
file://fixdown Pv#KmSA9
private void fixDown(int k) { eDuX"/kHA
int j; P1$f}K}
while ((j = k << 1) <= size) { JL@F~U9
if (j < size %26amp;%26amp; queue[j] j++; "@(58nk
if (queue[k]>queue[j]) file://不用交换 ~'(9?81d
break; 0xv\D0
SortUtil.swap(queue,j,k); (WJV.GcP1
k = j; 5qGGu.$Ihi
} {K+.A 9!
} !TGr.R
private void fixUp(int k) { \{lE0j7}h
while (k > 1) { %z=`JhE"Q
int j = k >> 1; <8$Md4r
if (queue[j]>queue[k]) Kf|0*c
break; 5H~@^!7t
SortUtil.swap(queue,j,k); hUBF/4s\
k = j; $khrWiX
} |l$ u<3
} QJQJR/g
#o~[1K+Yq
} A^8x1ydZ
JXL'\De ;
} nVNs][
,|A{!j`
SortUtil： c+H)ed>
G<|:605
package org.rut.util.algorithm; Q~8y4=|#CY
_OLI%o
import org.rut.util.algorithm.support.BubbleSort; f P+QxOz
import org.rut.util.algorithm.support.HeapSort; Y^yG/F
import org.rut.util.algorithm.support.ImprovedMergeSort; ),yH=6
import org.rut.util.algorithm.support.ImprovedQuickSort; 5 1"8Py
import org.rut.util.algorithm.support.InsertSort; l`*( f9Q
import org.rut.util.algorithm.support.MergeSort; b1H7
import org.rut.util.algorithm.support.QuickSort; !KAsvF,j
import org.rut.util.algorithm.support.SelectionSort; UPR/XQ
import org.rut.util.algorithm.support.ShellSort; Ep<YCSQy$i
.5]{M\aA
/** A=0@UqM
* @author treeroot {-J:4*`
* @since 2006-2-2 fwy"w
* @version 1.0 *CzCUu:%t
*/ U[bgu#P;
public class SortUtil { g[AA,@p+
public final static int INSERT = 1; Rh[Ibm56
public final static int BUBBLE = 2; /e .D/;]
public final static int SELECTION = 3; QTfu:m{
public final static int SHELL = 4; =E!x~S;N
public final static int QUICK = 5; ETe-
public final static int IMPROVED_QUICK = 6; k},>^qE
public final static int MERGE = 7; .x>HA^4
public final static int IMPROVED_MERGE = 8; !:dL~n
public final static int HEAP = 9; Ajg\aof0{
IyOpju)?
public static void sort(int[] data) { rtus`A5p
sort(data, IMPROVED_QUICK); yZ5x88>
} |UYED%dC
private static String[] name={ oE6|Zw
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VjY<\WqbS
}; 8ZW?|-i
"9%qbMB
private static Sort[] impl=new Sort[]{ "Tv:*L5
new InsertSort(), o(zTNk5d
new BubbleSort(), 8?kP*tmcZ
new SelectionSort(), b[yE~EQxr
new ShellSort(), jFG5)t<D
new QuickSort(), l=xt;c!
new ImprovedQuickSort(), X>{p}vtvf>
new MergeSort(), R3Ee%0QK
new ImprovedMergeSort(), K?[)E3
new HeapSort() G0pBR]_5z$
}; -,|ha>r
gvGi%gq
public static String toString(int algorithm){ -~\f2'Q
return name[algorithm-1]; M!#AfIyB
} <XvYa{t]{
yhwy>12,K
public static void sort(int[] data, int algorithm) { /p 5=i
impl[algorithm-1].sort(data); ;:T9IL
} K#wK1 Sv
/BT1oWi1y
public static interface Sort { rnH}#u+
public void sort(int[] data); `36N n+A
} R^6Zafp
2f^-~dz
public static void swap(int[] data, int i, int j) { *i@T!O(1)M
int temp = data; 1}nm2h1 I
data = data[j]; \lW_f{X)
data[j] = temp; :~D];m
} 8%-%AWF]
} ;_N"Fdl