[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; 5^i.;>(b
} s, n^
int i1=l; EkJVFHfh
int i2=mid+1; nW|'l^&
for(int cur=l;cur<=r;cur++){ /"""z=q
if(i1==mid+1) ]}z'X!v_@
data[cur]=temp[i2++]; tYs8)\{
else if(i2>r) .P)s4rQ\
data[cur]=temp[i1++]; t_jyyHxoZ:
else if(temp[i1] data[cur]=temp[i1++]; N[qA2+e$Z
else vG]GQ#
data[cur]=temp[i2++]; x37/cu
} s0cs'Rg
} c ]>DI&$;J
LH=d[3Y
} lSH ZV Fd
XkPv*%Er8
改进后的归并排序: XC|*A$x,
)v%l0_z{
package org.rut.util.algorithm.support; F:M>z=
6xH;:B)d
import org.rut.util.algorithm.SortUtil; fy&#M3UA\U
&Nc[$H7<
/** \U/v;Ijf
* @author treeroot fL!V$]HNt
* @since 2006-2-2 X*pZNz&E
* @version 1.0 T/[f5?p
*/ 7\IL
public class ImprovedMergeSort implements SortUtil.Sort { j~Q}F|i8
VmN}FMGN
private static final int THRESHOLD = 10; DH5bpg&T
HSNOL
/* m6b$Xyq[
* (non-Javadoc) Ri|k<io
* M_k`%o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tY/En-&t
*/ i<%m Iq1L
public void sort(int[] data) { ;\N79)Gk
int[] temp=new int[data.length]; /"=29sWB
mergeSort(data,temp,0,data.length-1); HHz;0V4w?
} r"R(}`<,
zhNQuK,L
private void mergeSort(int[] data, int[] temp, int l, int r) { l+%Fl=Q2em
int i, j, k; SOVjEo4'3
int mid = (l + r) / 2; >Q; g0\I_
if (l == r) O?CdAnhQc`
return; :^n*V6.4
if ((mid - l) >= THRESHOLD) YWEYHr;%^?
mergeSort(data, temp, l, mid); 6`acg'sk>
else o`idg[l.
insertSort(data, l, mid - l + 1); K[kds`
if ((r - mid) > THRESHOLD) a$d:_,\"
mergeSort(data, temp, mid + 1, r); G.E[6G3
else aX|g S\zx
insertSort(data, mid + 1, r - mid); zm>>} 5R
!X-9Ms}(d
for (i = l; i <= mid; i++) { z&O#v9.NE|
temp = data; \.o=icOx
} # Mu<8`T-
for (j = 1; j <= r - mid; j++) { ^w.]Hd2
temp[r - j + 1] = data[j + mid]; w&%9IJ
} 6Lb{r4^
int a = temp[l]; Uo~T'mA"
int b = temp[r]; >?z:2@Q)B
for (i = l, j = r, k = l; k <= r; k++) { H nK!aa
if (a < b) { {@3z\wMK$
data[k] = temp[i++]; vd`O aM}#U
a = temp; PSPTL3_~
} else { 6 Ew@L<v
data[k] = temp[j--]; RT,:hH
b = temp[j]; a"x}b
} bl=ku<}@
} GMl"{Oxo&
} H<g 1m
/jM_mrpz
/** }`9jH:q-Z
* @param data '3^Q14`R
* @param l XIKvH-0&
* @param i 5$kdgFq(
*/ J96uyS*
private void insertSort(int[] data, int start, int len) { :_v!#H)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @OzMiN
} Hfh!l2P
} fN@{y+6
} pe.Ml7o"
} u"`*DFjo*
*7ZtNo[+
堆排序： =_l)gx+Y+y
++b$E&lYU
package org.rut.util.algorithm.support; |#k@U6`SG
}AlYNEY
import org.rut.util.algorithm.SortUtil; onwjn+"&
l-<`m#/v
/** Sm)u9
* @author treeroot V7EQ4Om:It
* @since 2006-2-2 TN\|fzj
* @version 1.0 R:M,tL-l
*/ TkRmV6'w
public class HeapSort implements SortUtil.Sort{ ziiwxx_
"oR@JbdX
/* (non-Javadoc) @ &pqt6/t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -\4zwIH
*/ Br!9x{q*
public void sort(int[] data) { k2r3dO@q
MaxHeap h=new MaxHeap(); Q,gLi\siI
h.init(data); 6Z?Su(s(5
for(int i=0;i h.remove(); \9/RAY_G
System.arraycopy(h.queue,1,data,0,data.length); py @( <
} iG#}`
kJT+
private static class MaxHeap{ i7w(S3a
H}/05e
void init(int[] data){ Wpr ,jN8b
this.queue=new int[data.length+1]; uR$i48}
for(int i=0;i queue[++size]=data; .t=
fixUp(size); ; b*i3*!g
} Y%@hbUc}x9
} eVJ^\z:4
@}&_Dvf
private int size=0; ml0*1Dw
Z.1> kZ
private int[] queue; 6@V~0DG
v7,$7@$:\
public int get() { 6~xBi(m`
return queue[1]; Ls}7VKl'
} qtMD CXZ^n
PyBD
public void remove() { hr/o<#OW
SortUtil.swap(queue,1,size--); pDl3!m
fixDown(1); D=+NxR[
} ,eRQu.
file://fixdown nL-K)G,
private void fixDown(int k) { ,[e\cnq[
int j; @1:0h9%
while ((j = k << 1) <= size) { 2YlH}fnH
if (j < size %26amp;%26amp; queue[j] j++; j.%K_h?V5
if (queue[k]>queue[j]) file://不用交换 ^x m$EY*Y,
break; YlF%UPp
SortUtil.swap(queue,j,k); H,y4`p 0
k = j; tU:EN;H
} q%i-`S]}qL
} cBXWfv4
private void fixUp(int k) { G8J*Wnwu[K
while (k > 1) { mbxbEqz
int j = k >> 1; }D;WN@],
if (queue[j]>queue[k]) (V?:]
break; z~{&}Em ~
SortUtil.swap(queue,j,k); ypdT&5Mqb!
k = j; m@Rtlb
} y7)(LQRE {
} ]uQqn]+I!
mJ}opy!{;
} =1.9/hW
bt$)Xu<R
} y*23$fj(
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SortUtil： . (}1%22
/.z;\=;[n!
package org.rut.util.algorithm; i'#Gy,R
4 %W:
import org.rut.util.algorithm.support.BubbleSort; \tN-(=T
import org.rut.util.algorithm.support.HeapSort; E3aDDFDH
import org.rut.util.algorithm.support.ImprovedMergeSort; 7.g[SBUOG
import org.rut.util.algorithm.support.ImprovedQuickSort; <RNJ>>0
import org.rut.util.algorithm.support.InsertSort; Zd:Taieh@
import org.rut.util.algorithm.support.MergeSort; &--ej|n
import org.rut.util.algorithm.support.QuickSort; )#iq4@)|g
import org.rut.util.algorithm.support.SelectionSort; bm% $86
import org.rut.util.algorithm.support.ShellSort; }"^'%C8EX
9DQa PA6
/** VQ#3#Hj
* @author treeroot tmUFT
* @since 2006-2-2 hrGH}CU"
* @version 1.0 @]aOyb@
*/ "vZ!vt#'Y
public class SortUtil { Qnd5X`jF#
public final static int INSERT = 1; RsJ6OFcWV
public final static int BUBBLE = 2; 'T<iHV&
public final static int SELECTION = 3; umi5Wb<
public final static int SHELL = 4; s?R2B)a
public final static int QUICK = 5; u8GMUN
public final static int IMPROVED_QUICK = 6; kOo~%kcQ'
public final static int MERGE = 7; `;l.MZL!
public final static int IMPROVED_MERGE = 8; .iX# A<E}
public final static int HEAP = 9; 3&&9_`r&_
f"1>bW>R+
public static void sort(int[] data) { *3/T;x.
sort(data, IMPROVED_QUICK); ]n."<qxeT
} ::FS/Y]Fg
private static String[] name={ mtz#}qD66
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" PjA6Ji;Hu
}; -#!x|ne
/,=@8k!t?
private static Sort[] impl=new Sort[]{ { FZ=olZ
new InsertSort(), 3psU?8(
new BubbleSort(), Z_1U9+,
new SelectionSort(), 7\FXz'hA
new ShellSort(), V-'K6mn;
new QuickSort(), fjk\L\1
new ImprovedQuickSort(), W6H,6v
new MergeSort(), l<0}l^C.
new ImprovedMergeSort(), X4l@woh%
new HeapSort() ^j#rZ;uc
}; YQJ==C1
yeDsJ/L
public static String toString(int algorithm){ ,1OyN]f3
return name[algorithm-1]; b2b?hA'k
} <Rh6r}f
!l]dR@e
public static void sort(int[] data, int algorithm) { Wjhvxk
impl[algorithm-1].sort(data); &nBa=Enf
} J]f3CU,<N
e@:sR
public static interface Sort { _4^R9Bt
public void sort(int[] data); l2N]a9bq@
} iY"l}.7)
\%^%wXfp
public static void swap(int[] data, int i, int j) { w?kJ+lmOQy
int temp = data; dT,o=8fg
data = data[j]; "BX!
data[j] = temp; EdZ\1'&/9
} gUyR_5q)8l
} !,V{zTR