[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; S{)n0/_
} >]Yha}6h
int i1=l; ZO0]+Ko
int i2=mid+1; }:D~yEP
for(int cur=l;cur<=r;cur++){ Z a1|fB
if(i1==mid+1) gsR9M%mv
data[cur]=temp[i2++]; FR6I+@ oX~
else if(i2>r) ]%Yis=v
data[cur]=temp[i1++]; 5eSTT#[+R
else if(temp[i1] data[cur]=temp[i1++]; sv6U%qV
else DMxS-hl
data[cur]=temp[i2++]; t-x"(
} |mE+f]7$
} H|:)K^o
P$ dgO
} Z *<x
E!~2\qKT
改进后的归并排序: u`Qcw|R+
*|#JFy?c[
package org.rut.util.algorithm.support; a<"& RnG(
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import org.rut.util.algorithm.SortUtil; -+_aL4.
-Fc#
/** 4kF .
* @author treeroot Yg,lJ!q
* @since 2006-2-2 n@,eZ!
* @version 1.0 p{svXP K
*/ W#_gvW
public class ImprovedMergeSort implements SortUtil.Sort { vMdhNOU
xA'#JN<*
private static final int THRESHOLD = 10; P:-/3
7Z~szD
/* :h^UC~[h 3
* (non-Javadoc) Ci9wF(<k
* V;]VwsZ"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 14YV#o:
*/ -x\l<\*
public void sort(int[] data) { [*ovYpj^
int[] temp=new int[data.length]; UVmyOC[Y{
mergeSort(data,temp,0,data.length-1); d?y\~<
} `"mK\M
a&aIkD
private void mergeSort(int[] data, int[] temp, int l, int r) { wvaIgy%z
int i, j, k; safS>wM]
int mid = (l + r) / 2; ~I|R}hS
if (l == r) 8[`<u[Iv
return; `[:1!I.}-
if ((mid - l) >= THRESHOLD) YIUmCx0a
mergeSort(data, temp, l, mid); &Wz:-G7<n
else bK;aV&
insertSort(data, l, mid - l + 1); IeI%X\G
if ((r - mid) > THRESHOLD) NWwtq&pz2
mergeSort(data, temp, mid + 1, r); 0Ilvr]1a4
else 35kbE'
insertSort(data, mid + 1, r - mid); OSi9J.]O
il%tu<E#J~
for (i = l; i <= mid; i++) { !;C(pnE
temp = data; ,vw`YKg
} %vYlu%c<
for (j = 1; j <= r - mid; j++) { Eq;frnw>q
temp[r - j + 1] = data[j + mid]; "(&`muIc
} (Ha}xwA~(
int a = temp[l]; KBHKcFk
int b = temp[r]; /r@
for (i = l, j = r, k = l; k <= r; k++) { YgOgYo{E!
if (a < b) { L=!kDU
data[k] = temp[i++]; QGG(I7{-
a = temp; 3CuoBb8
} else { @wJa33QT
data[k] = temp[j--]; #|h8u`
b = temp[j]; {&qsh9ob
} 2MzFSmhc"
} O|zmDp8a+
} rB|:r\Z(jG
-+@~*$ d
/** Awf=yE:
* @param data ms<uYLp
* @param l zGz'2,o3
* @param i n7.lF
*/ <[l}^`IC^4
private void insertSort(int[] data, int start, int len) { @$}\S
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~6i mkv^ F
} TsW6w
} _?LI0iIFx
} yZaDNc9'
} 0%j;yzQ<
HcS^3^Y
堆排序： D|'Z c&
jt?%03iuk
package org.rut.util.algorithm.support; "E!p1
3-%~{(T/
import org.rut.util.algorithm.SortUtil; @soW f
3edK$B51;
/** Vzm7xl [
* @author treeroot T7_rnEOO
* @since 2006-2-2 S9055`v5
* @version 1.0 )X$n'E
*/ =DwH*U/YR
public class HeapSort implements SortUtil.Sort{ o;C)!
Qnh1su5
/* (non-Javadoc) HV(*6b@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :u93yH6~8
*/ 0LuY"(LR
public void sort(int[] data) { &`W,'qD$
MaxHeap h=new MaxHeap(); IQY#EyTb
h.init(data); vu >@_hv
for(int i=0;i h.remove(); 8GQs9
System.arraycopy(h.queue,1,data,0,data.length); Z9bPj8d
} sJ()ItU5i
~3]8f0^%m
private static class MaxHeap{ [T|1Qq7
)dDmq
void init(int[] data){ (:]iHg3
this.queue=new int[data.length+1]; WTN!2b
for(int i=0;i queue[++size]=data; ,W;8!n0
fixUp(size); WLFzLW=PD
} XaSl6CH
} >pHvBFa3G
3e1"5~?'<
private int size=0; c3-bn #
Gl1$W=pR:
private int[] queue; Ia" Mi+{
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public int get() { 'o9V0#$!
return queue[1]; Y:BrAa[
} K2v)"|T)
{a%cU[q
public void remove() { FQ^uX]<3j
SortUtil.swap(queue,1,size--); ^S$w,
fixDown(1); mt7:`-
} Q&{5.}L
file://fixdown obGSc)?j
private void fixDown(int k) { cn{l %6K
int j; Gl9a5b
while ((j = k << 1) <= size) { "$9ZkADO
if (j < size %26amp;%26amp; queue[j] j++; .<hv&t
if (queue[k]>queue[j]) file://不用交换 l>q.BG
break; :g_ +{4
SortUtil.swap(queue,j,k); Cvy;O~)
k = j; Id1[}B-T
} -2?fg
} <{j9|mt
private void fixUp(int k) { L1K_|X
while (k > 1) { > xw+2<
int j = k >> 1; ]B[Qdn
if (queue[j]>queue[k]) /2I("x]
break; EQ-~e
SortUtil.swap(queue,j,k); ,oe4*b}O=.
k = j; L}nc'smvM
} '(*D3ysU
} >48Y-w
><^@1z.J
} 4 -W?u51"
h~t]WN
} UzXbaQQ2g
PX'%)5:q;i
SortUtil： #UIg<:
HN%ZN}
package org.rut.util.algorithm; k5M(Ve
"m5ZZG#R`
import org.rut.util.algorithm.support.BubbleSort; K`3cH6"L6
import org.rut.util.algorithm.support.HeapSort; Zx0c6d!B
import org.rut.util.algorithm.support.ImprovedMergeSort; 4mg&H0 !
import org.rut.util.algorithm.support.ImprovedQuickSort; xa:P(x3[
import org.rut.util.algorithm.support.InsertSort; >[U$n.
import org.rut.util.algorithm.support.MergeSort; t&]IgF
import org.rut.util.algorithm.support.QuickSort; %yVZ|d*Q
import org.rut.util.algorithm.support.SelectionSort; = %m/
import org.rut.util.algorithm.support.ShellSort; T@.CwV
2"T&Fp<
/** FSk:J~Z;
* @author treeroot X:5*LB\/v
* @since 2006-2-2 f5v|}gMAX
* @version 1.0 *']RYu?X
*/ @P>@;S
public class SortUtil { C+j+q648>
public final static int INSERT = 1; LV0{~g(!%
public final static int BUBBLE = 2; ufOaD7
public final static int SELECTION = 3; <j'#mUzd
public final static int SHELL = 4; `P~RG.HO
public final static int QUICK = 5; (;3jmdJhK
public final static int IMPROVED_QUICK = 6; 1GxYuTZ{
public final static int MERGE = 7; 49D*U5o
public final static int IMPROVED_MERGE = 8; B~IOM
public final static int HEAP = 9; wv$=0zF
%;S5_K,
public static void sort(int[] data) { B#}RMFIj
sort(data, IMPROVED_QUICK); `JCC-\9T_
} -XBNtM_"
private static String[] name={ l=yO]a\QZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ADDpm-]
}; as8<c4:v
2},}R'aR
private static Sort[] impl=new Sort[]{ s*@.qN
new InsertSort(), ZmDr$iU~
new BubbleSort(), 5+r#]^eQY-
new SelectionSort(), n8Fi?/
new ShellSort(), Jor?;qo3
new QuickSort(), STMcMm3
new ImprovedQuickSort(), +?p ;,Z%5
new MergeSort(), ZO~N|s6B^
new ImprovedMergeSort(), {*m?t 7
new HeapSort() K+Qg=vGY
}; d?>sy\{2
4ET P
public static String toString(int algorithm){ =Ev } v
return name[algorithm-1]; q b'ka+X
} aSj$62G"
dxA=gL2
public static void sort(int[] data, int algorithm) { k&2I(2S
impl[algorithm-1].sort(data); 03xQ%"TU<
} x]:mc%4-Z
dNR4h
public static interface Sort { G2rvi=8=
public void sort(int[] data); <8Ad\MU
} Nuj%8om6
J_,y?}.e3
public static void swap(int[] data, int i, int j) { l"Css~^
int temp = data; VybiuP
data = data[j]; @ 9uwcM1F
data[j] = temp; 8PQ& 7o
} 83h6>D b
} "^\4xI