[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; Z)~2{)
} Z"u/8
int i1=l; $9/r*@bu8d
int i2=mid+1; q6dq@
for(int cur=l;cur<=r;cur++){ %qMk&1
if(i1==mid+1) .67W\p
data[cur]=temp[i2++]; "]<Ut{Xb
else if(i2>r) FgxQ}VvlH
data[cur]=temp[i1++]; ]Az >W*Y
else if(temp[i1] data[cur]=temp[i1++]; QG.FW;/L,
else HO>uS>+
data[cur]=temp[i2++]; !*;)]j
} "rtmDNpL
} 5h&8!!$[
;A_QI>>
} z; +x`i.
cl:YN]BK
改进后的归并排序: &x3y.}1
x8[8z^BV?e
package org.rut.util.algorithm.support; lq~n*uwO}t
gd*\,P
import org.rut.util.algorithm.SortUtil; !TcjB;q'
4-MA!&
/** +?8nY.~,'
* @author treeroot o,L!F`W
* @since 2006-2-2 WW.=>]7;
* @version 1.0 Y`wi=(
*/ 4{V=X3,x
public class ImprovedMergeSort implements SortUtil.Sort { #X+)
6m9Z5:xG
private static final int THRESHOLD = 10; VCIG+Gz
DIY WFVh
/* YG_3@`-<
* (non-Javadoc) 4s~o
* j<[<qU:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uAP|ASH9T
*/ Lqt]
public void sort(int[] data) { R!O'DM+
int[] temp=new int[data.length]; M1:m"#=
mergeSort(data,temp,0,data.length-1); a)]N#gx
} XX =A1#H
TUT>*
private void mergeSort(int[] data, int[] temp, int l, int r) { lH[N*9G(
int i, j, k; WE3l*7<@
int mid = (l + r) / 2; &\A$Rj)
if (l == r) 0R.@\?bhL
return; +ad 2
if ((mid - l) >= THRESHOLD) 2IGAZ%%
mergeSort(data, temp, l, mid); MkQSq MU=
else Kxg09\5i
insertSort(data, l, mid - l + 1); 1t6UI4U!$
if ((r - mid) > THRESHOLD) B,676~I
mergeSort(data, temp, mid + 1, r); MDRSI g
else W!{uEH{%l
insertSort(data, mid + 1, r - mid); &{>~|^
9T\:ID=h
for (i = l; i <= mid; i++) { SpkD
temp = data; 9%x[z%06
} \ZA%"F){
for (j = 1; j <= r - mid; j++) { `O[M#y%*E
temp[r - j + 1] = data[j + mid]; | .PLfc;
} qYE-z(i
int a = temp[l]; (+_Amw!W
int b = temp[r]; 2a{eJ89f
for (i = l, j = r, k = l; k <= r; k++) { >q`G?9d2
if (a < b) { %P?W^mI
data[k] = temp[i++]; `H\^#Zu
a = temp; A&z
} else { t{$t3>p-t
data[k] = temp[j--]; hHdC/mR
b = temp[j]; TOQvZ?_
} SQ@@79A
} ]LD@I;(_
} RAe:$Iv$!v
PS>k67sI
/** ex-`+cF
* @param data b*$^8%
* @param l }hGbF"clqg
* @param i ~q<UE\H
*/ TygRG+G-
private void insertSort(int[] data, int start, int len) { >8ePx,+!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); KNV$9&Z
} `A#r6+
} D.RHvo~6
} oYu5]ry
} b.$Gc!g
=!7yX;|
堆排序： {1FYHM^
vHWw*gg(/E
package org.rut.util.algorithm.support; x ha!.&DO
.*8.{n5
import org.rut.util.algorithm.SortUtil; na<g /&
8G9V8hS1#B
/** BH=vI<D
* @author treeroot eI- ~ +.
* @since 2006-2-2 Nj?,'?'O}
* @version 1.0 <#:"vnm$j
*/ Y1+f(Q
public class HeapSort implements SortUtil.Sort{ WO]dWO6Mm
m~#O ~)
/* (non-Javadoc) zp d4uto5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A\WgtM
*/ %6 Bt%H
public void sort(int[] data) { "}EydG"=
MaxHeap h=new MaxHeap(); *8Gx_$t&
h.init(data); d"$ \fL
for(int i=0;i h.remove(); R:11w#m7w
System.arraycopy(h.queue,1,data,0,data.length); HdVGkv/
} 6zyozJA
I9_tD@s"(
private static class MaxHeap{ dw'%1g.113
0?k/vV4
void init(int[] data){ ]U]{5AA6
this.queue=new int[data.length+1]; e%"L79Of6)
for(int i=0;i queue[++size]=data; ceAK;v o
fixUp(size); lv,<[Hw1
} <jfi"SJu
} X=-pNwO
|Zz3X
private int size=0; +.{_n(kU
C%l~qf1n
private int[] queue; 'R= r9_%
!DD|dVA{
public int get() { !<@Zf4m
return queue[1]; 6:J @
} xj(&EGY:
\#
public void remove() { (1*?2u*j
SortUtil.swap(queue,1,size--); v@[MX- ,8
fixDown(1); Z{&PKS
} ^BW V6
file://fixdown u[y>DPPx
private void fixDown(int k) { ACc.&,!IZ
int j; .BuY[,I+
while ((j = k << 1) <= size) { u.R:/H<>~
if (j < size %26amp;%26amp; queue[j] j++; OE WIP
if (queue[k]>queue[j]) file://不用交换 (V}DPA
break; s+9q:
SortUtil.swap(queue,j,k); $}N'm
k = j; XswEAz0=
} %=%jy
} KR#Bj?fz-H
private void fixUp(int k) { [p|-G*=00
while (k > 1) { Q lql(*
int j = k >> 1; $GPenQ~},
if (queue[j]>queue[k]) -fn["R]
break; ++BVn[1
SortUtil.swap(queue,j,k); 4>gkXfTF
k = j; XV]`?
} %.[t(F
} |{<g-)
q#F;GD
} %mg |kb6n
=D<46T=(RB
} 1vu=2|QN
ZmUS}
SortUtil： hI]KT a
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package org.rut.util.algorithm; aV,>y"S
{])F%Q_#cD
import org.rut.util.algorithm.support.BubbleSort; >?'cZTNk]
import org.rut.util.algorithm.support.HeapSort; ~"iCx+pr
import org.rut.util.algorithm.support.ImprovedMergeSort; (F +if
import org.rut.util.algorithm.support.ImprovedQuickSort; =&< s*-l[
import org.rut.util.algorithm.support.InsertSort; &CG3_s<2
import org.rut.util.algorithm.support.MergeSort; \@3i=!
import org.rut.util.algorithm.support.QuickSort; +kmPQdO;*/
import org.rut.util.algorithm.support.SelectionSort; x/R|i%u-s
import org.rut.util.algorithm.support.ShellSort; l0 rZril
{eMu"<
/** ma?$@]`k
* @author treeroot r. =_=V/t
* @since 2006-2-2 lmgMR|v
* @version 1.0 T[*=7jnJQ
*/ X2/`EN\
public class SortUtil { UXnd~DA
public final static int INSERT = 1; z{7&=$
public final static int BUBBLE = 2; p(:\)HP)R
public final static int SELECTION = 3; 8(\Az5%
public final static int SHELL = 4; [89#8|+
public final static int QUICK = 5; 25o + ?Y<
public final static int IMPROVED_QUICK = 6; ^D ;X
public final static int MERGE = 7; o'?Y0Wt
public final static int IMPROVED_MERGE = 8; 7_?:R2]n
public final static int HEAP = 9; HFB2ep7N
ZOi8)Y~
public static void sort(int[] data) { |JtdCP{
sort(data, IMPROVED_QUICK); H_3S#.
} [j`It4^nC
private static String[] name={ ZjF$zVk
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" p9y "0A|
}; {|O8)bW'
YO|Kc {j2e
private static Sort[] impl=new Sort[]{ % Lhpj[C
new InsertSort(), r*OSEzGUz
new BubbleSort(), r\.1=c#"bP
new SelectionSort(), Ky[/7S5E
new ShellSort(), A\CtM`
new QuickSort(), -:h5Ky"
new ImprovedQuickSort(), LsS/Sk
new MergeSort(), '(7]jug
new ImprovedMergeSort(), ]3BTL7r
new HeapSort() m1heU3BUWU
}; EgFV
;@Alr?y
public static String toString(int algorithm){ p3M)gH=N
return name[algorithm-1]; QS4sSua
} 7 g8SK
F<M#T
public static void sort(int[] data, int algorithm) { ;$wS<zp6
impl[algorithm-1].sort(data); ) ^'Q@W
} !;x
T2AyQ~5~
public static interface Sort { wm}6$n?Za
public void sort(int[] data); P>+{}c}3I
} /QZnN?k
3?|Fn8dQR.
public static void swap(int[] data, int i, int j) { T2P0(rEz
int temp = data; !k)}p_e
data = data[j]; ;XMbjWc
data[j] = temp; Zrr3='^s
} mqrP0/sN
} Q.*qU,4);