[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; ep5`&g]3
} ^(T~Qp
int i1=l; #:Q\
int i2=mid+1; QS4~":D/C
for(int cur=l;cur<=r;cur++){ S~m8j|3K
if(i1==mid+1) nRX'J5Q m<
data[cur]=temp[i2++]; 7zN7PHT=$t
else if(i2>r) k`'*niz
data[cur]=temp[i1++]; 2Kr8#_) 0
else if(temp[i1] data[cur]=temp[i1++]; C %j%>X`
else g 6?y{(1
data[cur]=temp[i2++]; W%&s$b(
} lOb(XH9
} X<W${L$G
b ~]v'|5[
} V4Qy^nn1
PD^ 6Ywn>s
改进后的归并排序: /={N^8^=x
u^'X>n)oL#
package org.rut.util.algorithm.support; 8ZjRMr}
`{IL.9M!f
import org.rut.util.algorithm.SortUtil; icVB?M,m
>bmdu\j5R
/** b,jo94.G
* @author treeroot ]M"U 'Z
* @since 2006-2-2 ^HuB40
* @version 1.0 KT(v'KE 1
*/ w4Hq|N1-Y
public class ImprovedMergeSort implements SortUtil.Sort { C*RPSk
)Xt#coagS
private static final int THRESHOLD = 10; N3KI6p6\
hhU\$'0B-
/* %ib7)8Ki0
* (non-Javadoc) z wwJyy%/
* nu|,wE!i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f4 +P2j
*/ XXwo(trs~=
public void sort(int[] data) { muK.x7zyl
int[] temp=new int[data.length]; &Wdi 5T8
mergeSort(data,temp,0,data.length-1); B=r+ m;(
} |{,c2Ck:N
9@Cu5U]
private void mergeSort(int[] data, int[] temp, int l, int r) { eQ[}ALIq
int i, j, k; T.%yeJiE
int mid = (l + r) / 2; y^Q);siSy
if (l == r) sUiO~<Ozpk
return; aehB,l0
if ((mid - l) >= THRESHOLD) _T805<aUW\
mergeSort(data, temp, l, mid); K,PN:
else oRg,oy
insertSort(data, l, mid - l + 1); p7izy$Wc
if ((r - mid) > THRESHOLD) s`v$r,N0
mergeSort(data, temp, mid + 1, r); y La E]
else Be\@n xV[
insertSort(data, mid + 1, r - mid); Jko=E
Bw+?MdS
for (i = l; i <= mid; i++) { :7Uv)@iUk
temp = data; '<e$ c
} 4}*.0'Hz
for (j = 1; j <= r - mid; j++) { Bk5 ELf8pL
temp[r - j + 1] = data[j + mid]; W|sU[dxZ
} &?xtmg<d
int a = temp[l]; sS4V(:3s
int b = temp[r]; t-}IKrbv
for (i = l, j = r, k = l; k <= r; k++) { z7P~SM
if (a < b) { Qk|+Gj
data[k] = temp[i++]; J5<16}*
a = temp; KCp9P2kv.
} else { x",ktE>9
data[k] = temp[j--]; +T,A^(&t
b = temp[j]; b53s@7/mq
} Vvfd?G"
} zyP/'X_~:
} 7.)_H
3'0Jn6(
/** tef>Py
* @param data D=.Ob<m`Z
* @param l RHbbj}B
* @param i ;v.J D7
*/ r%$\Na''
private void insertSort(int[] data, int start, int len) { #3RElI
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (WY9EJ<s,
} v:w^$]4
} NMC0y|G
} '0o^T 7C
} t0/Ol'kgs
cBOt=vg,5
堆排序： 4? rEO(SZ
1M55!b
package org.rut.util.algorithm.support; :v$)Z~
,iZKw8]f
import org.rut.util.algorithm.SortUtil; d{B0a1P
bcxR7<T,"9
/** ,I]]52+?4
* @author treeroot tqpi{e
* @since 2006-2-2 S<i.O
* @version 1.0 2#/sIu-L
*/ X(8LhsP
public class HeapSort implements SortUtil.Sort{ iO18FfM_
-r~9'aEs
/* (non-Javadoc) <*/Z>Z_c2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b=Ektq
*/ @LS%uqs
public void sort(int[] data) { J*6B~)Sp@
MaxHeap h=new MaxHeap(); XgeUS;qtta
h.init(data); 7Xh @%[
for(int i=0;i h.remove(); )"2eN3H/
System.arraycopy(h.queue,1,data,0,data.length); ,4-],~T
} x'6i9]+r
Q]RE,ZZ
private static class MaxHeap{ DFRgn
id`RscV]
void init(int[] data){ WYcZD_
this.queue=new int[data.length+1]; (hKjr1s
for(int i=0;i queue[++size]=data; jzWgyI1b
fixUp(size); #~qzaETv,
} fwUF5Y
} $DnR[V}rR!
`/i/AZ{
private int size=0; ^AXH}g
_c:th{*
private int[] queue; ,KPrUM}
Yg2P(
public int get() { K_.|FEV
return queue[1]; X_Pbbx_j
} D+q z`
\-[ >bsg
public void remove() { t.bM]QU!1
SortUtil.swap(queue,1,size--); ?hURNlR_Q
fixDown(1); ^6Yt2Bhs
} VrhHcvnZ
file://fixdown /,$V/q+
private void fixDown(int k) { %*gg6Q
int j; |'x"+x
while ((j = k << 1) <= size) { muFWFq&yP
if (j < size %26amp;%26amp; queue[j] j++; 0Xn,q]@Z
if (queue[k]>queue[j]) file://不用交换 ^bdXzjf
break; N{M25ucAHl
SortUtil.swap(queue,j,k); |}X[Yg=FG
k = j; ;.R) uCd{=
} ?T|0"|\"'
} EyBTja(4
private void fixUp(int k) { E4_,EeC#
while (k > 1) { cw0uLMqr`
int j = k >> 1; DC_k0VBn
if (queue[j]>queue[k]) 45jImCm
break; :n%&
SortUtil.swap(queue,j,k); !>kg:xV
k = j; ]<Q&
} wMCgLh\wi
} QWC C
A2P.5EN
} }"kF<gG1
D& &71X '
} q$K}Fm1C
qHd7C3
SortUtil： taO(\FOm
lJx5scN[
package org.rut.util.algorithm; giesof
)vuIO(8F#
import org.rut.util.algorithm.support.BubbleSort; $) qL=kR
import org.rut.util.algorithm.support.HeapSort; =OTu8_ d0t
import org.rut.util.algorithm.support.ImprovedMergeSort; MvaX>n!o
import org.rut.util.algorithm.support.ImprovedQuickSort; >m%7dU
import org.rut.util.algorithm.support.InsertSort; 8~Pdr]5
import org.rut.util.algorithm.support.MergeSort; D$TpT X\
import org.rut.util.algorithm.support.QuickSort; Q`-Xx
import org.rut.util.algorithm.support.SelectionSort; :C={Z}t/F
import org.rut.util.algorithm.support.ShellSort; B9c gVTLj
~JS@$#
/** qc';<
* @author treeroot HTm`_}G9
* @since 2006-2-2 >8$Lqj^i
* @version 1.0 1/?K/gL
*/ rcH{"\F_/
public class SortUtil { 3`NSSS
public final static int INSERT = 1; Tv~Ho&LS
public final static int BUBBLE = 2; ^D ;EbR
public final static int SELECTION = 3; 9}a&:QTHR
public final static int SHELL = 4; M+lr [,c
public final static int QUICK = 5; j;-2)ZLm
public final static int IMPROVED_QUICK = 6; ]U}B~Y
public final static int MERGE = 7; KUHkjA_
public final static int IMPROVED_MERGE = 8; Dg}EI^ d
public final static int HEAP = 9; $IdU
eIhfhz?Q;#
public static void sort(int[] data) { "/3YV%to-#
sort(data, IMPROVED_QUICK); {)Shc;Qh
} um2}XI
private static String[] name={ Wq}W )E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U% ?+N
}; 3l$D%y
lW4 6S
private static Sort[] impl=new Sort[]{ i4M%{]G3Y
new InsertSort(), Ies` !W^
new BubbleSort(), ^7=h%{>=
new SelectionSort(), s;sr(34
new ShellSort(), +NeoGnj
new QuickSort(), $)6M@S
new ImprovedQuickSort(), Wo,93]
new MergeSort(), 0;4 YU%u
new ImprovedMergeSort(), nu2m5RYx
new HeapSort() >q ,Z*s>?
}; "x 3C3Zu.;
9j5-/
public static String toString(int algorithm){ 6(ER$
return name[algorithm-1]; ^nDa-J$
} OgHqF,0MN
8~|v:qk
public static void sort(int[] data, int algorithm) { ]8<`&~a
impl[algorithm-1].sort(data); <KI>:@|Sc
} >T{TE"XyO|
:X}Ie P
public static interface Sort { DV)NY!
public void sort(int[] data); 5Z=GFKf|
} J-5kvQi8
%:OX^^i;
public static void swap(int[] data, int i, int j) { SQMtR2
int temp = data; Rh)%;
data = data[j]; RRl`;w?
data[j] = temp; XQtV$Lw
} 6:?mz;oP
} j*d+WZm8-g