[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; BL Q&VI4
} YMEI J}
int i1=l; ,H+LE$=
int i2=mid+1; &}/h[v_#'
for(int cur=l;cur<=r;cur++){ ^&-H"jF
if(i1==mid+1) ZFsJeF'"
data[cur]=temp[i2++]; Q0cr^24/
else if(i2>r) u]%>=N(^2
data[cur]=temp[i1++]; 'ffOFIz|=I
else if(temp[i1] data[cur]=temp[i1++]; !NfN16
else Rf.b_Y@O
data[cur]=temp[i2++]; L_4ZxsIv
} m&X6a C'[
} oI6o$C
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} FTfejk!
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改进后的归并排序: _2C[F~ +l
2AZ)|dM'`
package org.rut.util.algorithm.support; V*U*_Y
:*wjC.Z
import org.rut.util.algorithm.SortUtil; _hb@O2f
;uazQyo6
/** YN@4.&RP
* @author treeroot %95'oW)lo
* @since 2006-2-2 U'tfsf/V
* @version 1.0 ;Pi-H,1b
*/ Sn lKPd
public class ImprovedMergeSort implements SortUtil.Sort { 4[]/
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private static final int THRESHOLD = 10; HRY?[+
CL-mt5Kx#7
/* L9=D,C~
* (non-Javadoc) /\_wDi+#
* xE4iey@\}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *4tJ|m6"Y6
*/ ~yvOR`2Gg
public void sort(int[] data) { i@C$O.m(
int[] temp=new int[data.length]; '~ {xn
mergeSort(data,temp,0,data.length-1); < <vE.
} lV0\UySH
h^D]@H
private void mergeSort(int[] data, int[] temp, int l, int r) { -^sbf.
int i, j, k; 9(/ ;Wutj"
int mid = (l + r) / 2; M9/c8zZ
if (l == r) YIQm;EEG
return; 8,,$C7"EP
if ((mid - l) >= THRESHOLD) :2KLziO2
mergeSort(data, temp, l, mid); >_4Ck{^d#
else ?T(>!m
insertSort(data, l, mid - l + 1); z$>_c"D
if ((r - mid) > THRESHOLD) fb8t9sAI
mergeSort(data, temp, mid + 1, r); (IXe555
else Q/,bEDc&
insertSort(data, mid + 1, r - mid); =k1 ,jn+
Q6G-`&5
for (i = l; i <= mid; i++) { 2h6<'2'o1
temp = data; @L-3&~=
} O,kzU,zOs
for (j = 1; j <= r - mid; j++) { ho7L@NR
temp[r - j + 1] = data[j + mid]; 9N[PZD
} hK,e<?N^
int a = temp[l]; m"<Sb,"x!
int b = temp[r]; ORV~F0d<
for (i = l, j = r, k = l; k <= r; k++) { SJtQK-%wK>
if (a < b) { Qv%"iSe~J
data[k] = temp[i++]; 0 7CufoI
a = temp; |-HV@c]
} else { {1Z`'.FU
data[k] = temp[j--]; YFVNkBO%
b = temp[j]; k(oHmw
} !c+Nf2I7S
} Z. ))=w6G
} DB'd9<
TRl,L5wd-?
/** e `!PQMLU
* @param data 1N_Gk&
* @param l 1jJ>(S
* @param i nl)!)t=n
*/ XA~Cc<v
private void insertSort(int[] data, int start, int len) { 3Ms` ajJ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |=^p`CT
} P9)E1]Dc$
} iINd*eXb^
} Ny@CP}
} G`B e~NU
;/ iBP2
堆排序： lw4#xH-?
fWx %?J
package org.rut.util.algorithm.support; CfguL@tR.
:esHtkyML
import org.rut.util.algorithm.SortUtil; SO#NWa<0|
i+$G=Z#3E
/** BitP?6KX
* @author treeroot B&~#.<23:
* @since 2006-2-2 R\%&Q|
* @version 1.0 2nW:|*:/p6
*/ 3[g%T2&[
public class HeapSort implements SortUtil.Sort{ S <C'#vj
p&SxR}h
/* (non-Javadoc) j~(s3pSCo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d%:B,bck
*/ ,9I %t%sb
public void sort(int[] data) { uXX3IE[
MaxHeap h=new MaxHeap(); o5UM)g
h.init(data); +>#SB"'
for(int i=0;i h.remove(); v=A]#O%
System.arraycopy(h.queue,1,data,0,data.length); zI5#'<n
} Zl69d4vG
?MT V!i0
private static class MaxHeap{ O,`#h*{N
9E/{HNkf
void init(int[] data){ 2D;,'
this.queue=new int[data.length+1]; w-%V9]J1
for(int i=0;i queue[++size]=data; $4^cbk
fixUp(size); =IQ+9Fl2
} q6h'=By
} "@1e0`n Q
P|> fO'
private int size=0; Yv?nw-HM
!}Sf?nP#
private int[] queue; >wz&{9ni
Gkz\By
public int get() { >h^CC*&'pw
return queue[1]; u^DfRd&P0
} LUGyc( h
hk =nXv2M
public void remove() { D#ZzhHHP
SortUtil.swap(queue,1,size--); ;GW[Yw>Rz
fixDown(1); O)y|G%O
} J<g$hk
file://fixdown !^{0vFWE
private void fixDown(int k) { D00I!D16
int j; B?BB
while ((j = k << 1) <= size) { m0}Pq{g
if (j < size %26amp;%26amp; queue[j] j++; 00Tm]mMQX
if (queue[k]>queue[j]) file://不用交换 >WfkWUb
break; OAoTsqj6
SortUtil.swap(queue,j,k); ~*OQRl6F
k = j; \J*~AT~5q
} (twwDI
} p"A2N+
private void fixUp(int k) { 5K_KZL-
while (k > 1) { N/wUP
int j = k >> 1; X$aN:!1
if (queue[j]>queue[k]) F't4Q
break; x=1Iuc;&3
SortUtil.swap(queue,j,k); [$PW {d8|
k = j; @>>8CU^~
} :@BAiKa[wa
} G(g`>' m
dQX<X}
} 5*M3sN
>?-etl
} x$:>W3?T=^
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SortUtil： `w&Y[8+E
uw!w}1Y]}2
package org.rut.util.algorithm; J7Z`wjX1
:<t%Sf
import org.rut.util.algorithm.support.BubbleSort; cK()_RB#
import org.rut.util.algorithm.support.HeapSort; sGg=4(D
import org.rut.util.algorithm.support.ImprovedMergeSort; 5c(mgEvq
import org.rut.util.algorithm.support.ImprovedQuickSort; Un[olp
import org.rut.util.algorithm.support.InsertSort; s"hSn_m
import org.rut.util.algorithm.support.MergeSort; \"L ;Ct 8
import org.rut.util.algorithm.support.QuickSort; e70#"~gt[
import org.rut.util.algorithm.support.SelectionSort; _ELuQ>zM]+
import org.rut.util.algorithm.support.ShellSort; MIV<"A
L="ipM:Z
/** !V<c:6"
* @author treeroot ORVFp]gG
* @since 2006-2-2 >XTDN
* @version 1.0 $KSdNFtM)A
*/ GyirE`
public class SortUtil { MHl ffj
public final static int INSERT = 1; U +c?x2\
public final static int BUBBLE = 2; UE:';(t
public final static int SELECTION = 3; |6]2XW
public final static int SHELL = 4; bl8zcpdL
public final static int QUICK = 5; +JyD W%a:L
public final static int IMPROVED_QUICK = 6; OoW,mmthj>
public final static int MERGE = 7; XH^X4W
public final static int IMPROVED_MERGE = 8; 54X=58Q
public final static int HEAP = 9; |hx"yy'ux
ld*W\
public static void sort(int[] data) { h/'b(9fS
sort(data, IMPROVED_QUICK); CcGE4BB
} sBN"eHg
private static String[] name={ QcW6o,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" , %8keGhl
}; LS"_-4I}
_wp>AJ r
private static Sort[] impl=new Sort[]{ @ Sq =q=S
new InsertSort(), prIPPeMdz
new BubbleSort(), a ~
new SelectionSort(), !?AgAsSmc
new ShellSort(), V-1H(wRu
new QuickSort(), 5|nT5oS
new ImprovedQuickSort(), 4q9+a7@
new MergeSort(), Yz%AKp
new ImprovedMergeSort(), |:H 9#=
new HeapSort() L=7Y~aL=
}; p`+=) n
[8kufMY|
public static String toString(int algorithm){ `;`fA|F^
return name[algorithm-1]; VVd9VGvh
} [6ycs[{!
4Nb&(p
public static void sort(int[] data, int algorithm) { *KMW6dg;
impl[algorithm-1].sort(data); =,MX%-2
} 8;%F-?
1<9=J`(H
public static interface Sort { b0(bL_,
public void sort(int[] data); sKg IKYG}T
} Oax6_kmOj
pr=f6~Z-y
public static void swap(int[] data, int i, int j) { A$JL"~R
int temp = data; .RazjXAY
data = data[j]; j7(S=
data[j] = temp; EPd9'9S
} rtjUHhF
} ZwFVtR