[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; 3ay},3MCV%
} XQy`5iv
int i1=l; zV&l^.
int i2=mid+1; 9^}&PEl
for(int cur=l;cur<=r;cur++){ v$]B;;[A
if(i1==mid+1) f7x2"&?vg
data[cur]=temp[i2++]; 'zI(OnIS
else if(i2>r) p/ ITg
data[cur]=temp[i1++]; "#~>q(4^
else if(temp[i1] data[cur]=temp[i1++]; <o%T]
else t8*Jdd^3Z/
data[cur]=temp[i2++]; %zcA|SefP
} e(t}$Q=
} 8FuxN2
zS%XmS\
} T?7u [D[[
*BsK6iVb
改进后的归并排序: Hm2Y% 4i%
1[!:|=
package org.rut.util.algorithm.support; g6,DBkv2
|[.-pA^
import org.rut.util.algorithm.SortUtil; 8%9 C<+.R
/.SG? 5t4
/** MKBDWLCB
* @author treeroot c2P}P* _
* @since 2006-2-2 JXc.?{LL
* @version 1.0 (GC]=
*/ L_Ok?9$
public class ImprovedMergeSort implements SortUtil.Sort { D>7a0p784
"/'3I/}
private static final int THRESHOLD = 10; (7R?T}
y#GHmHeh
/* Cy;UyZ
* (non-Javadoc) q}LDFsU
* i\sBey ND"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dbby.%
*/ QHNyH
public void sort(int[] data) { ?Lg(,-:
int[] temp=new int[data.length]; )]P(!hW.
mergeSort(data,temp,0,data.length-1); :F:1(FDP
} h1_Z&VJ
}-oba_
private void mergeSort(int[] data, int[] temp, int l, int r) { F rckA
int i, j, k; uBlPwb,V
int mid = (l + r) / 2; (Q8!5s
if (l == r) w/6X9d
return; ?AyxRbk
if ((mid - l) >= THRESHOLD) d>p' A_
mergeSort(data, temp, l, mid); `s7pM
else aw*]b.f
insertSort(data, l, mid - l + 1); flmQNrC.8
if ((r - mid) > THRESHOLD) MfL7|b)
mergeSort(data, temp, mid + 1, r); ~Gfytn9x.;
else MltO.K!
insertSort(data, mid + 1, r - mid); $*0-+h
-#ZLu.
for (i = l; i <= mid; i++) { *`H*@2
temp = data; pAy4%|(
} @ VWED
for (j = 1; j <= r - mid; j++) { w ,j*I7V
temp[r - j + 1] = data[j + mid]; NxHUOPAJc
} X)3(.L
int a = temp[l]; JWb +
int b = temp[r]; b G:\*1T
for (i = l, j = r, k = l; k <= r; k++) { U`(=iyWP=
if (a < b) { CTNL->
data[k] = temp[i++]; wMVUTm
a = temp; 91]|4k93
} else { WoTeIkM9
data[k] = temp[j--]; gv`_+E{P
b = temp[j]; 9S%5Z>
} So1TH%
} `58%&3lp
} Yz/Blh%V
^\ [p6>
/** leC!Yj
* @param data R/~!km
* @param l t.( `$
* @param i n#">k%bD
*/ lx|Aw@C3~
private void insertSort(int[] data, int start, int len) { R%jOgZG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [D~]
} nCq'=L,m
} 30sJ"hF9
} QD@O!}; T
} ?\Z pVL<>
w % Hj'
堆排序： [BE_^d5&
=> (g_\
package org.rut.util.algorithm.support; R0Vt_7
Eg)24C R 4
import org.rut.util.algorithm.SortUtil; (%B{=w}8
`H! (hMMV
/** ?,pwYT0g
* @author treeroot q=X<QhK
* @since 2006-2-2 "KIY+7@S}
* @version 1.0 hju^x8 ,=m
*/ Fe!MA
public class HeapSort implements SortUtil.Sort{ !)]/?&uo
n#P>E(K
/* (non-Javadoc) 1 m'.wh|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )-4c@
*/ Xe_ <]|
public void sort(int[] data) { D)PX|xrn
MaxHeap h=new MaxHeap(); E*YmHJ:k
h.init(data); B=cA$620
for(int i=0;i h.remove(); 1K9.3n
System.arraycopy(h.queue,1,data,0,data.length); v[ iJ(C_
} '7'/+G'~&
jF?0,g
private static class MaxHeap{ \*t\=4
DSLX/uo1
void init(int[] data){ 5sJ>+Rg
this.queue=new int[data.length+1]; )h]+cGM
for(int i=0;i queue[++size]=data; 7z;2J;u`n
fixUp(size); <W0(!<U
} ??/bI~Sd
} zx$YNjeV
b\"F6TF:
private int size=0; 6:2*<
"pO
private int[] queue; ]'pfw9"f~
8w:ay,=
public int get() { Tr?p/9.m
return queue[1]; g4^-B
} R[m-jUL
?^~ZsOd8B
public void remove() { PlB3"{}0Q
SortUtil.swap(queue,1,size--); *O$|,EsY
fixDown(1); A"7YkOfwH
} WR #XPbk
file://fixdown lR %#R
private void fixDown(int k) { &4OJJ9S
int j; Ar>B_*dr
while ((j = k << 1) <= size) { )|=1;L
if (j < size %26amp;%26amp; queue[j] j++; V(TtOuv
if (queue[k]>queue[j]) file://不用交换 _#K|g#p5
break; }n&nuaj
SortUtil.swap(queue,j,k); "bej#'M#
k = j; +<\LY(o
} 8[@,i|kgg0
} +'m9b7+v
private void fixUp(int k) { zLl-{Kk
while (k > 1) { z- q.8~Z
int j = k >> 1; 5X^\AW
if (queue[j]>queue[k]) X4o#kW
break; ~3s?.[}d
SortUtil.swap(queue,j,k); Y^]n>X
k = j; o`CM15d*7o
} RFbf2s\t
} ;}Jv4Z
{gzQ/|}#z-
} CG%bZco((
mPA)G,^
} GSRf/::I}4
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SortUtil： bVcJ/+Yx|
h?TIxo:6/
package org.rut.util.algorithm; - egTZW-
uYebRCdR
import org.rut.util.algorithm.support.BubbleSort; boiP_*|MY
import org.rut.util.algorithm.support.HeapSort; 4(htdn6\
import org.rut.util.algorithm.support.ImprovedMergeSort; QI[WXxp
import org.rut.util.algorithm.support.ImprovedQuickSort; pBAAwHD
import org.rut.util.algorithm.support.InsertSort; `RY}g;
import org.rut.util.algorithm.support.MergeSort; DQ0S]:tC
import org.rut.util.algorithm.support.QuickSort; ZW?h\0Hh
import org.rut.util.algorithm.support.SelectionSort; -9LvAV>
import org.rut.util.algorithm.support.ShellSort; \8#[AD*@s2
JcRxNH )<"
/** V~PGmn[V
* @author treeroot ]n4PM=hz
* @since 2006-2-2 ;C-ds
* @version 1.0 }h1BAKg
*/ {eU>E/SQ
public class SortUtil { p@78Xmu?q
public final static int INSERT = 1; UG.:D';3,
public final static int BUBBLE = 2; v^eAQoFLhN
public final static int SELECTION = 3; >C,0}lj
public final static int SHELL = 4; rZ,qHM
public final static int QUICK = 5; MZ%J ]Nd
public final static int IMPROVED_QUICK = 6; i@:^b_
public final static int MERGE = 7; OX.5olb
public final static int IMPROVED_MERGE = 8; kVLZdXn,q2
public final static int HEAP = 9; | K|AUI
y3j$?oM
public static void sort(int[] data) { nOyG7:
sort(data, IMPROVED_QUICK); JA{kifu0+
} 1!1,{\9%
private static String[] name={ 8@vq.z}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f/L8usBXq
}; y={ k7
W.4R+kF<
private static Sort[] impl=new Sort[]{ MVMJl">
new InsertSort(), !43nL[]
new BubbleSort(), +m JG:n
new SelectionSort(), _*}D@yy&
new ShellSort(), w5q6c%VZ
new QuickSort(), skeeec\V
new ImprovedQuickSort(), MNU7OX<
new MergeSort(), pej-W/R&
new ImprovedMergeSort(), (f"Qz~R|6_
new HeapSort() !ldE9 .
}; n%h009-5
4r;le5@
public static String toString(int algorithm){ pKXSJ"Xo
return name[algorithm-1]; \ MuKS4
} #HL$`&m
0qR#o/~I
public static void sort(int[] data, int algorithm) { W+u@UJi
impl[algorithm-1].sort(data); +;!^aNJ,
} eAO@B
G>^= Bm_$
public static interface Sort { qh bagw~
public void sort(int[] data); .\H-?6R^
} &2:WezDF
!rgXB(
public static void swap(int[] data, int i, int j) { zx)}XOYf
int temp = data; <O) if^
data = data[j]; bZSt<cH3
data[j] = temp; =?L16mu1&
} )%/ Ni^
} "o%okN