[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; "Xk%3\{P
} +M O5'z
int i1=l; J*~2:{=%
int i2=mid+1; gq_7_Y/
for(int cur=l;cur<=r;cur++){ j /dE6d
if(i1==mid+1) p$1Rgm\
data[cur]=temp[i2++]; ?Ga2K
else if(i2>r) #C;zS9(]B
data[cur]=temp[i1++]; ]n]uN~)9
else if(temp[i1] data[cur]=temp[i1++]; dFP-(dX#
else |k .M+
data[cur]=temp[i2++]; @W\4UX3dK
} ddq 1NW
} 1;:t~Y
@23RjoK
} gLSG:7m@
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改进后的归并排序: ?I2k6%a
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package org.rut.util.algorithm.support; Fr3d#kVR
pG F5aF7T
import org.rut.util.algorithm.SortUtil; CziaxJ
x"llX
/** g[wP!y%V
* @author treeroot *JY`.t
* @since 2006-2-2 O})u'
* @version 1.0 J={OOj
*/ H")N_BB
public class ImprovedMergeSort implements SortUtil.Sort { /=YqjZTCq
B#k3"vk#
private static final int THRESHOLD = 10; g\\1C2jG
' MS!ss=r
/* 3Da,]w<
* (non-Javadoc) s 9|a2/{
* @Tfwh/UN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) | 2.e0Z]k
*/ j`|^s}8t
public void sort(int[] data) { Ld}(*-1i
int[] temp=new int[data.length]; cbu nq"
mergeSort(data,temp,0,data.length-1); NM1cyZ
} C*EhexK,}
2 ]DCF
private void mergeSort(int[] data, int[] temp, int l, int r) { ;Up'~BP(
int i, j, k; or%gTVZ
int mid = (l + r) / 2; >1a\%G
if (l == r) @W1WReK]f
return; tFvgvx\:
if ((mid - l) >= THRESHOLD) }}``~
mergeSort(data, temp, l, mid); _/jUs_W
else Ku0H?qft(
insertSort(data, l, mid - l + 1); .kbr?N,'
if ((r - mid) > THRESHOLD) 0/SC
mergeSort(data, temp, mid + 1, r); L* khj3;
else qJX+[PJ
insertSort(data, mid + 1, r - mid); B3cf] S%
R?bn,T>
for (i = l; i <= mid; i++) { GcZM+c
temp = data; l~fh_IV1
} *dG}R#9Nv
for (j = 1; j <= r - mid; j++) { FYXw$7'l
temp[r - j + 1] = data[j + mid]; T\2) $
} +24|_Lx0
int a = temp[l]; 3b|7[7}&
int b = temp[r]; o%Uu.P
for (i = l, j = r, k = l; k <= r; k++) { > h,y\uV1
if (a < b) { N /sEec
data[k] = temp[i++]; O>SuZ>g+7
a = temp; 4V228>9w
} else { =GH@.3`X
data[k] = temp[j--]; H]tSb//qc
b = temp[j]; N#RD:"RS!
} 462!;/y
} 192.W+H<
} =`]|/<=9'U
Evr2|4|O~
/** to!mz\F
* @param data e0v9uQ%F5
* @param l dysX
* @param i DOF?(:8Y
*/ %z-dM` i
private void insertSort(int[] data, int start, int len) { f[JI/H>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6K4`;
} MtZt8s
} i!SW?\
} IOsXPf9@
} uQ:ut(
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堆排序： vx\nr8'k
y3={NB+
package org.rut.util.algorithm.support; `d}W;&c
I"8d5a}
import org.rut.util.algorithm.SortUtil; ^i{,z*vi
Y]+e Df
/** 0NL :z1N-h
* @author treeroot >vD['XN,
* @since 2006-2-2 E6'8Zb
* @version 1.0 3AdP^B<
*/ TnN^2:cU
public class HeapSort implements SortUtil.Sort{ E1c>nrnh*
9,S,NvSq
/* (non-Javadoc) [<D+pqh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $:f.Krj
*/ tk`: CT *
public void sort(int[] data) { K,x$c %
MaxHeap h=new MaxHeap(); tr}KPdE
h.init(data); K[Yc<Q
for(int i=0;i h.remove(); z3^RUoGU
System.arraycopy(h.queue,1,data,0,data.length); 7XUhJN3n
} VFilF<jvu
U9<_6Bsd
private static class MaxHeap{ _-@ZOhw&
n\Z^K
void init(int[] data){ tv 4s12&
this.queue=new int[data.length+1]; Fy 4Tvg
for(int i=0;i queue[++size]=data; *oEv,I_
fixUp(size); `j"4:
} 9M1a*frxZ
} ((-aC`
-;+m%"k5
private int size=0; X!U]`Qh
_wm~}_Q
private int[] queue; -/M9 vS
9Tzc(yCY
public int get() { "NxOOLL
return queue[1]; J*}VV9H
} i'Y-V]->
<8iYL`3
public void remove() { g/OI|1a
SortUtil.swap(queue,1,size--); NlA*\vco
fixDown(1); Z -pyFK\
} jmRhAJV
file://fixdown tegOT]|
private void fixDown(int k) { @AvM
int j; D",A$(lG
while ((j = k << 1) <= size) { AU0$A403
if (j < size %26amp;%26amp; queue[j] j++; Q8 -3RgAw
if (queue[k]>queue[j]) file://不用交换 ZvUp#8x(3
break; P-[fHCg~
SortUtil.swap(queue,j,k); (YAI,Xnw
k = j; jZa25Z00
} OF-E6bc
} w>v5oy8s-
private void fixUp(int k) { D35m5+=I
while (k > 1) { TRSOO}
int j = k >> 1; h^['rmd
if (queue[j]>queue[k]) 9TqnzD
break; W=~id"XtJ
SortUtil.swap(queue,j,k); "w;08TX8
k = j; M_tj7Q3 W
} vAi"$e
} vz6SCGg,
JR/W9i
} ktN%!Mh\
kclp}
} XlRw Z/Wc
W7%p^;ZQ$
SortUtil： zs4>/9O
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package org.rut.util.algorithm; Mg#`t$u
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import org.rut.util.algorithm.support.BubbleSort; {*sGhGwr
import org.rut.util.algorithm.support.HeapSort; W|lH
import org.rut.util.algorithm.support.ImprovedMergeSort; SrSG{/{
import org.rut.util.algorithm.support.ImprovedQuickSort; AeN 3<|RN
import org.rut.util.algorithm.support.InsertSort; W5pn;u- sz
import org.rut.util.algorithm.support.MergeSort; *:?QB8YJ
import org.rut.util.algorithm.support.QuickSort; *f{7
import org.rut.util.algorithm.support.SelectionSort; 3b#L17D3_
import org.rut.util.algorithm.support.ShellSort; j0AwL7
}|AX_=a
/** L?C\Q^0"`G
* @author treeroot !syU]Yk
* @since 2006-2-2 a/#+92C
* @version 1.0 3*G5F}7%=
*/ {!lNL[x
public class SortUtil { P_Z M'[
public final static int INSERT = 1; P2O\!'aEh
public final static int BUBBLE = 2; uG4$2
public final static int SELECTION = 3; O97VdNT8
public final static int SHELL = 4; x,w8r+~5
public final static int QUICK = 5; yXkt:O,i
public final static int IMPROVED_QUICK = 6; _0w1kqW
public final static int MERGE = 7; `q^(SM
public final static int IMPROVED_MERGE = 8; %yeu"
public final static int HEAP = 9; Bu&So|@TL
[Uswf3
public static void sort(int[] data) { S[Vtq^lU
sort(data, IMPROVED_QUICK); |0lLl^zp
} 2v4W6R
private static String[] name={ SBC~QD>L+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?fB5t;~E
}; Xj%,xm>}!u
S,XKW(5
private static Sort[] impl=new Sort[]{ z23#G>I&
new InsertSort(), OH>r[,z0
new BubbleSort(), ;"D~W#0-v
new SelectionSort(), >8%M*-=p
new ShellSort(), Ha?G=X
new QuickSort(), lHcA j{6
new ImprovedQuickSort(), C(}^fJ6r
new MergeSort(), _wmI(+_
new ImprovedMergeSort(), HV8I nodi
new HeapSort() ?5`{7daot
}; V- /YNRV
AH|Y<\
public static String toString(int algorithm){ '|_/lz$h
return name[algorithm-1]; MBlBMUJk
} 2R\+}
9YAM#LBTWi
public static void sort(int[] data, int algorithm) { *-6?
impl[algorithm-1].sort(data); iM"asEU
} v_.HGGS
0JK2%%
public static interface Sort { @$oZ|ZkZ
public void sort(int[] data); 0iF-}o
} ndqckT@93
eIsT!V"7
public static void swap(int[] data, int i, int j) { ;uK";we
int temp = data; *<7l!#
data = data[j]; >9{zQf!
data[j] = temp; pziq0
} RB IOdz
} lirNYJ]tO