[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; @@& ?,3
} {-51rAyi
int i1=l; $AHdjQ[;6-
int i2=mid+1; }CvhLjo
for(int cur=l;cur<=r;cur++){ pg3h>)$/
if(i1==mid+1) \9 k3;zw
data[cur]=temp[i2++]; FO)`&s"&2
else if(i2>r) wu3p2#-Z
data[cur]=temp[i1++]; wRJ`RKJ-T
else if(temp[i1] data[cur]=temp[i1++]; Wql,*|
else IJBIO>Z/
data[cur]=temp[i2++]; kyL]4:@W`
} O+=C8
} > QK"r7f/
?&bB?mg\
} <[V1z=Eo/]
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改进后的归并排序: xzBUm
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package org.rut.util.algorithm.support; +THK Jn!>
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import org.rut.util.algorithm.SortUtil; s,~g| I\
h"dn:5G:=
/** Na<);Pg
* @author treeroot Mh=j^ [4Q
* @since 2006-2-2 w\ddC DZ
* @version 1.0 R/kF,}^F
*/ *mkL>v &
public class ImprovedMergeSort implements SortUtil.Sort { gaR~K
y)b=7sU
private static final int THRESHOLD = 10; v_,'NA0
._6e#=
/* zE?@_p1gei
* (non-Javadoc) 9lB$i2G>Zw
* ;]_h")4"c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U4h5K}j4
*/ %(>,eee_
public void sort(int[] data) { v8>bR|n5
int[] temp=new int[data.length]; AL*M`m_
mergeSort(data,temp,0,data.length-1); u_6x{",5I
} Jm,tN/o*
u6iX&%e
private void mergeSort(int[] data, int[] temp, int l, int r) { G.>Ul)O:a
int i, j, k; A }d\ND
int mid = (l + r) / 2; /-Nq DRmJ
if (l == r) <P#:dS%r
return; [I=1
if ((mid - l) >= THRESHOLD) F_~A8y
mergeSort(data, temp, l, mid); Z |<
else `( _N9.>B
insertSort(data, l, mid - l + 1); `W2 o~r*&
if ((r - mid) > THRESHOLD) xo#K_"E
mergeSort(data, temp, mid + 1, r); =$uSa7t#
else F87c?Vh)K
insertSort(data, mid + 1, r - mid); 9S8V`aC
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for (i = l; i <= mid; i++) { C;']FmK]
temp = data; VTK +aI
} /#!1
for (j = 1; j <= r - mid; j++) { -GYJ)f
temp[r - j + 1] = data[j + mid]; i)7B :uA
} #dkSAS
int a = temp[l]; m=V69 a#
int b = temp[r]; 15M!erT
for (i = l, j = r, k = l; k <= r; k++) { b ; U
if (a < b) { J6Nhpzp
data[k] = temp[i++]; a'?V:3 ]
a = temp; U|+c&TY
} else { f*Yr*yC
data[k] = temp[j--]; oq2-)F2/
b = temp[j]; "]U_o<V
} 8j}o\!H
} 4c@_u8
} 1:Wl/9mL
K1zH\wH
/** q:9CFAX0=
* @param data .yQ<
* @param l EKNmXt1 lE
* @param i N[;R8SP
*/ !YX_k<1E
private void insertSort(int[] data, int start, int len) { 9}'92
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :*eJ*(M
} ]BfJ~+ N
} b 4A1M
} =jvL2ps<
} `Af5%m[
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堆排序： GB}!7W"
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package org.rut.util.algorithm.support; A5RM&y
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import org.rut.util.algorithm.SortUtil; t4+bRmS`_
`+@r0:G&v
/** >)VWXv0
* @author treeroot CQH^VTQ
* @since 2006-2-2 0Z jE(3i
* @version 1.0 H6<3'P
*/ u^( s0q
public class HeapSort implements SortUtil.Sort{ WP !u3\91
Bs^p!4=
/* (non-Javadoc) ICzcV };$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lF~!F<^9
*/ S0?e/VWy
public void sort(int[] data) { \ \gAa-}:
MaxHeap h=new MaxHeap(); -d^c!Iu|
h.init(data); |l:,EA_v|
for(int i=0;i h.remove(); Ted!*HKlB
System.arraycopy(h.queue,1,data,0,data.length); 7$Lt5rn"}
} #2;8/"v
&90pKs
private static class MaxHeap{ E=t^I/f)E
gQuU_dbXSB
void init(int[] data){ (8Te{Kh'
this.queue=new int[data.length+1]; zin'&G>l
for(int i=0;i queue[++size]=data; lKV7IoJ&;
fixUp(size); fhmBKeFdV
} '}E"Mdb
} s"x(i
T2 /u7<D-
private int size=0; /@0
<"nF`'olV
private int[] queue; (>`S{L C>s
]s`cn}d
public int get() { LXm@h
return queue[1]; /l;_ xs
} )u]1j@Id
#=#bv`
public void remove() { 60r0O5=|Fl
SortUtil.swap(queue,1,size--); `Db%:l^e
fixDown(1); 8" (j_~;
} [9\Mf4lh#
file://fixdown %9_jF"
private void fixDown(int k) { W/u_<\
int j; E+~1GKd
while ((j = k << 1) <= size) { r=<1*u
if (j < size %26amp;%26amp; queue[j] j++; Xuj=V?5
if (queue[k]>queue[j]) file://不用交换 .B{:<;sa
break; f9^MLb6)
SortUtil.swap(queue,j,k); z;\,Dt
k = j; Aq_?8Cd
} @m9dB P
} qm"AatA
private void fixUp(int k) { IY}{1[<N
while (k > 1) { _vUId?9@+e
int j = k >> 1; #-kx$(''V
if (queue[j]>queue[k]) @[~j|YH}
break; >[4CQK`U
SortUtil.swap(queue,j,k); fT5vO.a
k = j; eNr2-R
} SeBl*V
} 4_ kg/
o(g}eP,g}
} =/(R_BFna
wSG!.Ejc7
} J1Oe`my
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SortUtil： y~Vl0f;
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package org.rut.util.algorithm; }ssL;q
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import org.rut.util.algorithm.support.BubbleSort; pI}6AAs}Z
import org.rut.util.algorithm.support.HeapSort; OK%d1M^8j
import org.rut.util.algorithm.support.ImprovedMergeSort; vGD D
import org.rut.util.algorithm.support.ImprovedQuickSort; i?6#>;f
import org.rut.util.algorithm.support.InsertSort; #fq&yjl#A
import org.rut.util.algorithm.support.MergeSort; 6d;RtCENo
import org.rut.util.algorithm.support.QuickSort; '@WS7`@-y
import org.rut.util.algorithm.support.SelectionSort; Je=k.pO1
import org.rut.util.algorithm.support.ShellSort; <UbLds{+Uo
h3MZLPe
/** ij02J`w:Ra
* @author treeroot (~]0)J
* @since 2006-2-2 `9Q O'^)
* @version 1.0 ~Q+J1S]Fs
*/ @%I-15Jz
public class SortUtil { j0A9;AP;;C
public final static int INSERT = 1; CMU\DO
public final static int BUBBLE = 2; 1j+RXb\<
public final static int SELECTION = 3; 6<{SbE|G{
public final static int SHELL = 4; _"lW
public final static int QUICK = 5; Nj+gSa9
public final static int IMPROVED_QUICK = 6; r~PVh?
public final static int MERGE = 7; D4PjE@D"H
public final static int IMPROVED_MERGE = 8; AIt;~x
public final static int HEAP = 9; 8-FW'bA
Vs, &
public static void sort(int[] data) { Ev,b5KelD
sort(data, IMPROVED_QUICK); 5KL??ao-
} 7rIEpN>*
private static String[] name={ %!OA/7XbG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $q0i=l&$&
}; P5`BrY,hZ
b.QL\$a &
private static Sort[] impl=new Sort[]{ <O4W!UVg
new InsertSort(), B=|m._OL]n
new BubbleSort(), %D E_kwL
new SelectionSort(), %dq|)r
new ShellSort(), oC|']r6
new QuickSort(), LteZ7e
new ImprovedQuickSort(), &'W ~~ir
new MergeSort(), oZw#]Q@
new ImprovedMergeSort(), >"pHk@AWK
new HeapSort() e{}vT$-
}; P@8S|#LpZ
)KUEkslR:
public static String toString(int algorithm){ :$N{NChx
return name[algorithm-1]; yu$xQ~ o
} B\6%.R
DB.)/(zWQ
public static void sort(int[] data, int algorithm) { ~iU@ns|g\
impl[algorithm-1].sort(data); M+Eg{^ q`
} p~h[4hP
dWVm'd
public static interface Sort { -H"^;37T"
public void sort(int[] data); ^2"3h$DJfS
} "]x#kM
.12H/F
public static void swap(int[] data, int i, int j) { vec4R )S
int temp = data; '?qI_LP?
data = data[j]; "T' QbK0
data[j] = temp; [ Ru( H
} D[<~^R;*
} epxbTJfc