[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; 1u)I}"{W>
} b3y@!_'c
int i1=l; PNg,bcl
int i2=mid+1; lq1pgM?Kf
for(int cur=l;cur<=r;cur++){ V..m2nQj
if(i1==mid+1) 7}TjOWC
data[cur]=temp[i2++]; EQu M|4$ix
else if(i2>r) |CStw"Fog
data[cur]=temp[i1++]; \>:(++g
else if(temp[i1] data[cur]=temp[i1++]; k@KX=mG<
else rs 7R5 F
data[cur]=temp[i2++]; A%%WPBk{O
} zx0{cNPK5
} a8A8?:
{9_CH<$W%U
} ]U'KYrh
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改进后的归并排序: LD]XN'?"W
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package org.rut.util.algorithm.support; Ur]5AJ
tw\/1wa.
import org.rut.util.algorithm.SortUtil; olQ;XTa01F
!3?HpR/nV
/** YuLW]Q?v
* @author treeroot Eh8.S)E
* @since 2006-2-2 LxsB.jb-
* @version 1.0 Ed_A#@V
*/ #{i\t E
public class ImprovedMergeSort implements SortUtil.Sort { Tw-gM-m;
PlTY^N6Hn
private static final int THRESHOLD = 10; OW1[Y-o[
XZIj' a0d
/* Gi ZyC
* (non-Javadoc) 70*Y4'u}A
* GZ*cV3Y`&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $I>.w4G}
*/ Sf lHSMFw
public void sort(int[] data) { b_cD >A
int[] temp=new int[data.length]; <:>a51HBX
mergeSort(data,temp,0,data.length-1); Jr 9\j3J{
} 6S<J'9sE
[ V/*{Z
private void mergeSort(int[] data, int[] temp, int l, int r) { b.;F)(
int i, j, k; ks 3<zW(
int mid = (l + r) / 2; %3'80u6BCJ
if (l == r) e"[o2=v;5
return; AGS?<6W-
if ((mid - l) >= THRESHOLD) n#bC,
mergeSort(data, temp, l, mid); TJ2$ Z
else N[E t
insertSort(data, l, mid - l + 1); 80 i<Ij8J
if ((r - mid) > THRESHOLD) ndW??wiM
mergeSort(data, temp, mid + 1, r); z9'ME
else ]NG`MZ
insertSort(data, mid + 1, r - mid); <E!M<!h
? vk;b!
for (i = l; i <= mid; i++) { 3QU<vdtr
temp = data; O62H4oT
} V.\do"m
for (j = 1; j <= r - mid; j++) { iHWl%]7sN
temp[r - j + 1] = data[j + mid]; A$[@AY$MI
} F0+u#/#
int a = temp[l]; Z5_U D
int b = temp[r]; DHgEhf]
for (i = l, j = r, k = l; k <= r; k++) { qZCA16
if (a < b) { ZIkXy*<(
data[k] = temp[i++]; |V%Qp5 XJ
a = temp; 6'+3""\
} else { Y2QlK1.8V
data[k] = temp[j--]; [p[Kpunr{l
b = temp[j]; ~48Uch\LG:
} <gQw4
} 9m%[ y1v0
} b2r@vZ]D
[bH6>{3u
/** K7U`
* @param data D~U4K-
* @param l 0bS\VUB(
* @param i N3 07lGb
*/ :74)nbS
private void insertSort(int[] data, int start, int len) { .KXpB7:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oG3>lqBwD2
} k0!b@ c
} Mm+_>
} 50Pz+:
} QV4{=1A
Et4gRS)\
堆排序： >Vn;1|w
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package org.rut.util.algorithm.support; Ef:.)!;jy
7b \HbgZ
import org.rut.util.algorithm.SortUtil; aXhgzI5]
rpQB# Pz
/** 11Pm lzy
* @author treeroot mJ)o-BV
* @since 2006-2-2 j%#n}H
* @version 1.0 <p-R{}8
*/ E+]gC
public class HeapSort implements SortUtil.Sort{ `N]!-=o
u-f_,],p
/* (non-Javadoc) al(t-3`<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E[)`+:G]
*/ )$]_;JFr
public void sort(int[] data) { uIiE,.Uu}
MaxHeap h=new MaxHeap(); v<HhB.t.
h.init(data); {^1D|y
for(int i=0;i h.remove(); \%K< S
System.arraycopy(h.queue,1,data,0,data.length); #\GWYWkR
} E#Smi507p
0x4p!5
private static class MaxHeap{ $*\[I{Zau}
jyb/aov
void init(int[] data){ )F8G q,
this.queue=new int[data.length+1]; WIa4!\Ky!
for(int i=0;i queue[++size]=data; \|L ~#{a
fixUp(size); vxzh|uF
} TG=) KS
} `lRZQ:27X
^%VMp>s
private int size=0; *[) b}?
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private int[] queue; \/xWsbG\
f-E]!\Pg
public int get() { :-fCyF)EI
return queue[1]; w[S2 ]<
} kid3@
BlF>TI%2
public void remove() { N2 wBH+3w
SortUtil.swap(queue,1,size--); "M3R}<Vt
fixDown(1); uosFpa
} D'$ki[{,
file://fixdown vSb$gl5H
private void fixDown(int k) { !iN=py
int j; 4onRO!G,
while ((j = k << 1) <= size) { w4\b^iJz
if (j < size %26amp;%26amp; queue[j] j++; f R$E*Jd
if (queue[k]>queue[j]) file://不用交换 /. k4Y
break; d3v5^5kU
SortUtil.swap(queue,j,k); \tc4DS
k = j; suC]
} _VLc1svv
} )$p<BLU
private void fixUp(int k) { H~Xi;[{7
while (k > 1) { &^=6W3RD
int j = k >> 1; E:a_f!
if (queue[j]>queue[k]) xc7Wk&{=
break; wR@&C\}9
SortUtil.swap(queue,j,k); $!h21
k = j; <7NY.zvwk]
} ae`*0wbv
} rvgArFf}]
]?whx&+
} 8=Xy19<;t
s.d }*H-o
} OSY$qL2
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SortUtil： _WO*N9Iz
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package org.rut.util.algorithm; hK5BOq!y
tgCEz%
import org.rut.util.algorithm.support.BubbleSort; se(ZiyHp
import org.rut.util.algorithm.support.HeapSort; D[yOFJ~p)
import org.rut.util.algorithm.support.ImprovedMergeSort; j qfxQ
import org.rut.util.algorithm.support.ImprovedQuickSort; .Zv@iL5
import org.rut.util.algorithm.support.InsertSort; `dO)}}| y
import org.rut.util.algorithm.support.MergeSort; Xxhzzm-B
import org.rut.util.algorithm.support.QuickSort; 00X~/'!
import org.rut.util.algorithm.support.SelectionSort; FH:^<^M
import org.rut.util.algorithm.support.ShellSort; UIPi<_Xa
owM3Gz%?UA
/** biLx-F c
* @author treeroot A Ch!D>C1
* @since 2006-2-2 -LI^(_
* @version 1.0 4iMo&E<
*/ \Ld/'Z;w
public class SortUtil { CV&+^_j'k
public final static int INSERT = 1; s ~c_9,JK
public final static int BUBBLE = 2; FRqJ#yd]
public final static int SELECTION = 3; do@`(f3g
public final static int SHELL = 4; fG_.&!P
public final static int QUICK = 5; MHar9)$}
public final static int IMPROVED_QUICK = 6; cBs:7Pnp%
public final static int MERGE = 7; COvcR.*0F
public final static int IMPROVED_MERGE = 8; }q7rR:g
public final static int HEAP = 9; ;;#28nV
Y%eFXYk.
public static void sort(int[] data) { fn(< <FA)
sort(data, IMPROVED_QUICK); GvQKFgO6h
} /Z`("X?_Kf
private static String[] name={ E_k<EQ%r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" LE#ko2#ke
}; mhU ?N
D_mdX9-~
private static Sort[] impl=new Sort[]{ 8s^CE[TA
new InsertSort(), l-4+{6lz
new BubbleSort(), fP<Tvf
new SelectionSort(), iG*@(
new ShellSort(), i8t%v
new QuickSort(), mNhVLB
new ImprovedQuickSort(), &ig6\&1
new MergeSort(), 9+><:(,
new ImprovedMergeSort(), r:.3P
new HeapSort() b'F#Y9
}; D&0y0lxI@
TrA&yXXL
public static String toString(int algorithm){ [l"|x75-
return name[algorithm-1]; 2|]pD
} )\oLUuL`;
g+'=#NS}
public static void sort(int[] data, int algorithm) { ^U1@ hq*u
impl[algorithm-1].sort(data); u~[=5r
} O)v?GQRj
Lso4ZZ;
public static interface Sort { BOqu$f+
public void sort(int[] data); b7;`A~{9v
} y*ux7KO
R)}ab{A
public static void swap(int[] data, int i, int j) { pgNyLgN
int temp = data; $646"1S
data = data[j]; +Wgp~$o4
data[j] = temp; YKCd:^u
} :g@H=W
} ,gYbi-E