[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; \>9^(N
} l_;6xkv4
int i1=l; 3{qB<*!p"G
int i2=mid+1; "C3J[) qC
for(int cur=l;cur<=r;cur++){ X!{K`~DRX
if(i1==mid+1) Y9-F\t=~
data[cur]=temp[i2++]; e1b?TF@lz
else if(i2>r) Q e/XEW
data[cur]=temp[i1++]; +P9eE,WR
else if(temp[i1] data[cur]=temp[i1++]; {\k }:)
else B&7:=t,m(
data[cur]=temp[i2++]; !Mgo~h"]#
} eU)QoVt
} G]$EIf'
6pb~+=3n
} R@uA4Al
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改进后的归并排序: <l!:#u
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package org.rut.util.algorithm.support; /V cbT >=
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import org.rut.util.algorithm.SortUtil; *qYw
)n<p_vz
/** o&M.9V?~~
* @author treeroot _PGd\>Ve
* @since 2006-2-2 W!"QtEJ,
* @version 1.0 V$FZVG/@#
*/ NB44GP1-@
public class ImprovedMergeSort implements SortUtil.Sort { [zq2h3r
T#6g5Jnsp
private static final int THRESHOLD = 10; Kwm_Y5`A
CY.92I@S
/* S~H>MtX(<
* (non-Javadoc) SXe1Q8;
* __+8wC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <_kA+&T
*/ QrFKjmD<
public void sort(int[] data) { Y^DGnx("m
int[] temp=new int[data.length]; 3.P7GbN
mergeSort(data,temp,0,data.length-1); Xf"< >M
} 1he5Zevm}
"1XTgCu\
private void mergeSort(int[] data, int[] temp, int l, int r) { )/[L)-~y~
int i, j, k; XM"Qs.E
int mid = (l + r) / 2; j[mII5e7g
if (l == r) |c2sJyj*
return; x)Zm5&"Gg
if ((mid - l) >= THRESHOLD) p{v*/<.;
mergeSort(data, temp, l, mid); Zl'/Mxg
else Dk$<fMS,7c
insertSort(data, l, mid - l + 1); @vib54G
if ((r - mid) > THRESHOLD) R i,_x
mergeSort(data, temp, mid + 1, r); (GGosXU-v
else *_J{_7pwe
insertSort(data, mid + 1, r - mid); _<F;&(o
N^wHO<IO1
for (i = l; i <= mid; i++) { =j~:u.hc'
temp = data; o%`=+-K
} 'Q7^bF^
for (j = 1; j <= r - mid; j++) { 8sBT&A6&j
temp[r - j + 1] = data[j + mid]; ,uNJz-B8
} dIh+h|:
int a = temp[l]; g]N'6La
int b = temp[r]; 4^YE*6z
for (i = l, j = r, k = l; k <= r; k++) { cX4]ViXSr
if (a < b) { K1R?Qt,qDF
data[k] = temp[i++]; 9c*B%A8J
a = temp; ")txFe
} else { 9LBZMQ
data[k] = temp[j--]; Dm}M8`|X
b = temp[j]; zkqn>
} F#)bGi
} ~#P]NWW%.
} fI<d&5&g
]91QZ~4a
/** UU[z\^w| E
* @param data .p o,.}
* @param l &Ruq8n<
* @param i mvTp,^1
*/ Jd v;+HN[
private void insertSort(int[] data, int start, int len) { '3sySsD&O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $%'3w~h`
} vGPsjxk&
} #639N9a~
} dS <*DP
} d+5~^\lV
8HZ+r/j
堆排序： x H=15JY1W
d:^B2~j
package org.rut.util.algorithm.support; H[OgnnM
IoK/2Gp
import org.rut.util.algorithm.SortUtil; <-N2<sl
uifVSf*
/** xYW&Mfka
* @author treeroot zA.0Sm
* @since 2006-2-2 53a^9
* @version 1.0 j!%^6Io4
*/ U1lqg?KO
public class HeapSort implements SortUtil.Sort{ h9}*_qc&kV
mW{>
/* (non-Javadoc) W\w#}kY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4*E5@{D
*/ fn5-Tnsq*
public void sort(int[] data) { nP*%N|0
MaxHeap h=new MaxHeap(); N#-pl:J(
h.init(data); 1 JIU5u)
for(int i=0;i h.remove(); ?YS 3)
System.arraycopy(h.queue,1,data,0,data.length); >}O}~$o
} v*dw'i
:Y1;= W
private static class MaxHeap{ '6>*J
esx/{j;<u
void init(int[] data){ SZ$WC8AX
this.queue=new int[data.length+1]; v3XM-+Z4
for(int i=0;i queue[++size]=data; z,^~H
fixUp(size); ) < U9
} )78T+7Kq
} ]cmX f
uZJfIC<>
private int size=0; iI7ocyUv
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private int[] queue; 3/Z>W|w#w
ez*QP|F*9
public int get() { /T(9:1/G
return queue[1]; > l0H)W
} #qDm)zCM
!d!u{1Y&
public void remove() { pPo xx"y
SortUtil.swap(queue,1,size--); yzzJKucVU:
fixDown(1); YC56]Zp
} 4G&dBH
file://fixdown iT,7jd?6#
private void fixDown(int k) { $YcB=l
int j; w( XZSE
while ((j = k << 1) <= size) { SUUN_w~
if (j < size %26amp;%26amp; queue[j] j++; 3z2 OW@zL$
if (queue[k]>queue[j]) file://不用交换 6(4d3}F
break; *x;4::'Jn
SortUtil.swap(queue,j,k); :N$-SV
k = j; r-.@MbBm
} nM b@ B
} l$EN7^%w
private void fixUp(int k) { "opMS/a"7
while (k > 1) { dpNERc5
int j = k >> 1; S5y.H
if (queue[j]>queue[k]) zhFm2
break; fbOqxF"?we
SortUtil.swap(queue,j,k); )=29Hm"
k = j; 2@GizT*mA
} ^rP]B-)
} Km%L1Cd]
MsP6C)dz
} wB \`3u4
}$L63;/H
} }(ORh2Ri
"z3rH~q72
SortUtil： NId.TaXh
5h6o}
package org.rut.util.algorithm; )rG4Nga5}
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import org.rut.util.algorithm.support.BubbleSort; G--X)h-
import org.rut.util.algorithm.support.HeapSort; 15<? [`:6
import org.rut.util.algorithm.support.ImprovedMergeSort; Y-YuY
import org.rut.util.algorithm.support.ImprovedQuickSort; [p`5$\e
import org.rut.util.algorithm.support.InsertSort; \'*M }G
import org.rut.util.algorithm.support.MergeSort; K SOD(
import org.rut.util.algorithm.support.QuickSort; x6s|al
import org.rut.util.algorithm.support.SelectionSort; l&qCgw
import org.rut.util.algorithm.support.ShellSort; _"yA1D0d_
e}d(.H%l0
/** uij^tN%
* @author treeroot Cg]),S
* @since 2006-2-2 Im/tU6ybV
* @version 1.0 uu,F5<y[
*/ ZqVbNIY
public class SortUtil { 'OziP
public final static int INSERT = 1; =huV(THU
public final static int BUBBLE = 2; .)!QsBU
public final static int SELECTION = 3; *$NZi*z3
public final static int SHELL = 4; xV5UaD<
public final static int QUICK = 5; y3s+.5;
public final static int IMPROVED_QUICK = 6; IyyBW2
public final static int MERGE = 7; p,$N-22a
public final static int IMPROVED_MERGE = 8; tMiIlf!>p
public final static int HEAP = 9; bP9ly9FH
#T^2=7 w
public static void sort(int[] data) { y-1e(:GF
sort(data, IMPROVED_QUICK); *<($.c
} ^1bslCe
private static String[] name={ Kx]SiejJ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >{IPt]PCn
}; r%ES#\L6+|
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private static Sort[] impl=new Sort[]{ "/i$_vl
new InsertSort(), - Fbp!*. u
new BubbleSort(), TD}<U8I8_
new SelectionSort(), 'YNdrvz
new ShellSort(), 1" cv5U
new QuickSort(), 1w^wa_qx
new ImprovedQuickSort(), fj5g\m
new MergeSort(), qM(}|fMbN
new ImprovedMergeSort(), k*hl"oL"X
new HeapSort() lZcNio
}; UPfO;Z`hJ
s.}K?)mH
public static String toString(int algorithm){ 2(xC|
return name[algorithm-1]; E s5:S#
} 'Be'!9K*d
`)n4I:)2
public static void sort(int[] data, int algorithm) { Pj-INc96
impl[algorithm-1].sort(data); :/;/mHG]
} EE!}$qOR
[!A[oK9i C
public static interface Sort { :-k|jt
public void sort(int[] data); `R[ZY!=+
} &&X,1/
,JV0ib,
public static void swap(int[] data, int i, int j) { RU:Rt'
int temp = data; e /JQ #A
data = data[j]; %x$U(I}
data[j] = temp; y~ =H`PAE
} `um,S
} ^hC'\09=c