[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; =G<S!qW
} aw0xi,Jz
int i1=l; akA C^:F
int i2=mid+1; *:,7 A9LY
for(int cur=l;cur<=r;cur++){ s|8_R;
if(i1==mid+1) x"PMi[4
data[cur]=temp[i2++]; &nF7CCF
else if(i2>r) C F<
data[cur]=temp[i1++]; d4-cZw}+
else if(temp[i1] data[cur]=temp[i1++]; .aR$ou,7
else <H!;/p/S
data[cur]=temp[i2++]; B3Esfk
} P1QGfp0-J
} UBy:W^\g
8c'E
} SbpO<8}8
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改进后的归并排序: '^M3g-C[Jg
b*qC
package org.rut.util.algorithm.support; K<tkNWasQ
V0 OT_F
import org.rut.util.algorithm.SortUtil; jvos)$;L-
C0Ti9
/** ldm=uW
* @author treeroot l.i&.;f
* @since 2006-2-2 !.k
* @version 1.0 y3C$%yv0
*/ [mk!]r
public class ImprovedMergeSort implements SortUtil.Sort { 0IjQqI
"Mmvf'N
private static final int THRESHOLD = 10; /!0{9F<
jCbxI^3A
/* :j,e0#+sA
* (non-Javadoc) |"a%S,I'
* o%tvwv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <El6?ml@
*/ +hS}msu'
public void sort(int[] data) { :ITz\m
int[] temp=new int[data.length]; Kth^WHL
mergeSort(data,temp,0,data.length-1); /ZKO\q
} ojd/%@+u+Y
P/FO,S-V
private void mergeSort(int[] data, int[] temp, int l, int r) { #fYz367>
int i, j, k; bKH8/*Yk
int mid = (l + r) / 2; F/w!4,'<?5
if (l == r) cB7=4:U
return; GP/3r[MH
if ((mid - l) >= THRESHOLD) 7nHlDPps)
mergeSort(data, temp, l, mid); "VcG3.
else t1 .6+
insertSort(data, l, mid - l + 1); E8Wgm 8
if ((r - mid) > THRESHOLD) )f0t"lk
mergeSort(data, temp, mid + 1, r); !Hr +|HKQ?
else v 1O* Q
insertSort(data, mid + 1, r - mid); b9([)8
S\jN:o#b
for (i = l; i <= mid; i++) { scUWI"
temp = data; =X2EF
} "U&
for (j = 1; j <= r - mid; j++) { UvOB`Vj
temp[r - j + 1] = data[j + mid]; u]ZCYJ>
} @[S\ FjI
int a = temp[l]; c;bp[Y3R
int b = temp[r]; dDy9yw%f?
for (i = l, j = r, k = l; k <= r; k++) { _,;c2
if (a < b) { E$rn^keM
data[k] = temp[i++]; >g6:{-b^a
a = temp; @4b"0ne}h
} else { #sEbu^
data[k] = temp[j--]; LE!3'^Zq
b = temp[j]; p]#%e0
} /\_ s
} #f@sq5pTO
} z>hG'
?ei7jM",
/** QSy=JC9
* @param data /cDla5eej
* @param l ` oYrW0Vm
* @param i ' 7>V4\"
*/ PhM3?$
private void insertSort(int[] data, int start, int len) { nK6{_Y>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nQvv'%v0
} %c(':vI#
} hun/H4f|
} l23#"gGb
} K$\]\qG6
/'}O-h
堆排序： )fR'1_
o%!a
package org.rut.util.algorithm.support; c0jC84*v
=8fp4#]7
import org.rut.util.algorithm.SortUtil; mg*[,_3q33
z.pP~he
/** W04-D
* @author treeroot bY;ah;<
* @since 2006-2-2 oO>mGl36H
* @version 1.0 `hL16S
*/ 5>JrTO5
public class HeapSort implements SortUtil.Sort{ dHzo_VV
>t O(S
/* (non-Javadoc) p}}o#a~V),
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) icHc!m?
*/ 4RNB\D
public void sort(int[] data) { Hc4]2pf
MaxHeap h=new MaxHeap(); cyG3le& +G
h.init(data); {v56k8uZ
for(int i=0;i h.remove(); N/mTG2'<
System.arraycopy(h.queue,1,data,0,data.length); Cjsy1gA
} O%y.
$ T.c>13
private static class MaxHeap{ 9#.nNv*z3
a%sr*`
void init(int[] data){ ED @9,W0
this.queue=new int[data.length+1]; Dw?nf
for(int i=0;i queue[++size]=data; 7 rOziKZ"
fixUp(size); <`b)56v:+
} U*=ebZno
} 9=~"^dp54%
Y_)!U`>N?
private int size=0; ,Rk;*MEMJ
u:3~Ius
private int[] queue; zVYX#- nv
0S;H`w_S
public int get() { INE8@}e
return queue[1]; -Yy,L%E]F:
} ;+`t[ go
{d(@o!;Fi
public void remove() { =h\,-8
SortUtil.swap(queue,1,size--); @]t}bF]
fixDown(1); ;zIAh[z
} u)MdFz
file://fixdown B3]q*ERAo
private void fixDown(int k) { ^N _kiSr
int j; 6+e@)[l.zc
while ((j = k << 1) <= size) { dmW0SK
if (j < size %26amp;%26amp; queue[j] j++; )VID ;l;4
if (queue[k]>queue[j]) file://不用交换 B_anO{3$4
break; 9^<t0oY
SortUtil.swap(queue,j,k); S v$%-x^t
k = j; *f=H#
} znzh$9tH
} @S yGj#
private void fixUp(int k) { mTT1,|
while (k > 1) { 3G dWq*
int j = k >> 1; )Y+n4UL3NK
if (queue[j]>queue[k]) X<m#:0iD
break; [*Nuw_l
SortUtil.swap(queue,j,k); VChNDHiH
k = j; )"2)r{7:
} vX;WxA<
} #TM+Vd$
Lf{9=;
} /mX/ "~
_$]3&P
} ] hGU.C"(
u;GS[E4
SortUtil： i<l_z&
[O>}%
package org.rut.util.algorithm; j{U?kW{o
9^,MC&eb
import org.rut.util.algorithm.support.BubbleSort; R$IxR=hMx
import org.rut.util.algorithm.support.HeapSort; '.r_6X$7Jt
import org.rut.util.algorithm.support.ImprovedMergeSort; <spVUp
import org.rut.util.algorithm.support.ImprovedQuickSort; A'HFpsa
import org.rut.util.algorithm.support.InsertSort; L}pMjyM
import org.rut.util.algorithm.support.MergeSort; K>hQls+
import org.rut.util.algorithm.support.QuickSort; //n$#c_}u
import org.rut.util.algorithm.support.SelectionSort; {b6| wQ\
import org.rut.util.algorithm.support.ShellSort; s4/4o_[W
:a @_GIC
/** > L_kSC?
* @author treeroot sa$CCQ
* @since 2006-2-2 8i/5L=a"`
* @version 1.0 '/%]B@!
*/ zgXg-cr
public class SortUtil { (`\ DDJ[
public final static int INSERT = 1; }lt5!u~}
public final static int BUBBLE = 2; GKTt!MK
public final static int SELECTION = 3; gQMcQV]C$
public final static int SHELL = 4; ^<49NUB>
public final static int QUICK = 5; FD:3;nUY7
public final static int IMPROVED_QUICK = 6; GX?R# cf
public final static int MERGE = 7; z{Z4{&M
public final static int IMPROVED_MERGE = 8; \ :To\6\Ri
public final static int HEAP = 9; .R'<v^H
vVQwuV
public static void sort(int[] data) { \!M6-kmi
sort(data, IMPROVED_QUICK); r#rL~Rsd}
} A[:0?Ez=
private static String[] name={ P0VXHE1p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $`,10uw
}; *;cvG?V
:}'5'oVG
private static Sort[] impl=new Sort[]{ vqO d`_)
new InsertSort(), vy&'A$ H
new BubbleSort(), sG{fxha
new SelectionSort(), '/8{Mx+
new ShellSort(), C{(&Yy"
new QuickSort(), pURtk-Fr2
new ImprovedQuickSort(), WxLbf+0o
new MergeSort(), M3 MB{cA2
new ImprovedMergeSort(), {\zTE1X9
new HeapSort() 3/_rbPr
}; pGz 5!d
Rp.42v#ck
public static String toString(int algorithm){ czNi)4x
return name[algorithm-1]; \#Md3!MG
} T_iX1blrgh
kNq>{dNRx
public static void sort(int[] data, int algorithm) { |H-%F?<{
impl[algorithm-1].sort(data); a',6WugIP
} OlRtVp1
!r\u,l^
public static interface Sort { >TI/W~M
public void sort(int[] data); @^P<(%p
} |wbXu:
|5il5UP
public static void swap(int[] data, int i, int j) { Qa`+-Wu8
int temp = data; U{1%ldOJ%
data = data[j]; +_E^E
data[j] = temp; `qoRnG
} F8xz^UQO
} ^mH:8_=(.