[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; u38FY@U$
} JmdXh/X
int i1=l; ^Cb7R/R3
int i2=mid+1; %0T/>:1[E
for(int cur=l;cur<=r;cur++){ $,"{g<*k;
if(i1==mid+1) 3`_jNPV1
data[cur]=temp[i2++]; bf2R15|t5`
else if(i2>r) xExy?5H7
data[cur]=temp[i1++]; q+2yp&zF
else if(temp[i1] data[cur]=temp[i1++]; NfcY30}:
else 7><ne|%
data[cur]=temp[i2++]; CK[2duf^~
} B;tU+36nM
} Cd)e_&
/=Bz[O
} <y5V],-U
x bF*4;^SI
改进后的归并排序: ;;'b;,/
f%9EZ+OP
package org.rut.util.algorithm.support; 8>a/x,
{Pm^G^EP
import org.rut.util.algorithm.SortUtil; k+S+: 5
6ae
/** _l]`Og@Y
* @author treeroot <K!5N&vh
* @since 2006-2-2 'Ht$LqG
* @version 1.0 )BNm~sP
*/ ]4SnOSV?S
public class ImprovedMergeSort implements SortUtil.Sort { P{mV
wm0vqY+N$
private static final int THRESHOLD = 10; v<bq1QG
`HU`=a&d
/* 0z{S@
* (non-Javadoc) n m(yFX?=
* <\Nf6>_qEM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <b"ynoM.A
*/ P;0tI;
public void sort(int[] data) { c.jq?Q k
int[] temp=new int[data.length]; Y'"2s~_ Z
mergeSort(data,temp,0,data.length-1); h-hU=I8
} =MO2M~e!
*)"U5A/v)
private void mergeSort(int[] data, int[] temp, int l, int r) { fEc}c.!5
int i, j, k; Us.yKAHPV
int mid = (l + r) / 2; ;>[).fX>/
if (l == r) g6EdCG.V
return; xG0IA 7
if ((mid - l) >= THRESHOLD) w=\Lw+X
mergeSort(data, temp, l, mid); VA.jt}YGE
else GyJp! xFB
insertSort(data, l, mid - l + 1); I$0`U;Xd
if ((r - mid) > THRESHOLD) Mh'QD)28c
mergeSort(data, temp, mid + 1, r); I2("p.+R
else T:x5 ,vpM
insertSort(data, mid + 1, r - mid); >1:s.[&
@8C^[fDL
for (i = l; i <= mid; i++) { At%g^
temp = data; JbzYr]k
} Taxi79cH
for (j = 1; j <= r - mid; j++) { k\_>/)g
temp[r - j + 1] = data[j + mid]; W]5kM~Q@
} 5)V]qV$
int a = temp[l]; XG<J'3
int b = temp[r]; ` _()R`=
for (i = l, j = r, k = l; k <= r; k++) { q:#,b0|bv
if (a < b) { -_'M *-
data[k] = temp[i++]; pr>Qu:
a = temp; ]+)z}lr8 C
} else { N%6jZmKip
data[k] = temp[j--]; %*OKhrM
b = temp[j]; E*IkI))X0
} Vi`+2%4
} gwQL9 UYx
} lJoMJS;S]}
&J^@TgqL^
/** ^ef:cS$;
* @param data K @"m0
* @param l |tz1'YOB
* @param i },0fPkVsU
*/ ]g3&gw
private void insertSort(int[] data, int start, int len) { {>OuxVl??k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7M}T^LC
} i\2MphS
} U jVo "K
} aW %ulZ
} %Z&[wU~
NFY,$
堆排序： KXcG;b[7n
7^Uv1ezDR
package org.rut.util.algorithm.support; R+lKQAyC0=
hU5[k/ q
import org.rut.util.algorithm.SortUtil; V'pNo&O=
iKV;>gF,)v
/** .{HU1/!
* @author treeroot -"Lia!Q]M
* @since 2006-2-2 n?@3R#4D3
* @version 1.0 '1ff|c!x9
*/ wQb")3dw
public class HeapSort implements SortUtil.Sort{ 2tCep
2f`u?T
/* (non-Javadoc) gm8L5c V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s['F?GWg
*/ Po&gr@e.V
public void sort(int[] data) { =r+u!~%@''
MaxHeap h=new MaxHeap(); wED~^[]f
h.init(data); R_uA!MoLs
for(int i=0;i h.remove(); "vH@b_>9|
System.arraycopy(h.queue,1,data,0,data.length); }CaL:kY8
} #93;V'b]
N_$ X4.7p
private static class MaxHeap{ eL^,-3JA(]
x*i5g`jx
void init(int[] data){ ;W?e@ Lgxk
this.queue=new int[data.length+1]; 2{"Wa|o`
for(int i=0;i queue[++size]=data; 8l>/ZZ.NXi
fixUp(size); LGK0V!W
} [[JwHM8H&
} ^qiTO`lg
!rb)Y;WQt
private int size=0; J\_tigd
(o{QSk\
private int[] queue; vb9G_Pfz
N-3w)23*:
public int get() { h_?D%b~5
return queue[1]; -#3B>VY
} / !jd%,G
Y!i4P#4+q
public void remove() { tAP~
SortUtil.swap(queue,1,size--); QtkyKR
fixDown(1); 8iK>bp
} g[-'0d\1
file://fixdown I6YN&9Y
private void fixDown(int k) { ~c! XQJ
int j; \M="R-&b
while ((j = k << 1) <= size) { tLS5yT/
if (j < size %26amp;%26amp; queue[j] j++; }_3<Q\j
if (queue[k]>queue[j]) file://不用交换 JmWN/mx
break; pb$U~TvzhM
SortUtil.swap(queue,j,k); -78 t0-lM
k = j; `P)atQ
} B Gh%3"q
} _(<[!c!@0
private void fixUp(int k) { xlqRW"
while (k > 1) { u` `FD
int j = k >> 1; "^zxq5u
if (queue[j]>queue[k]) >\^:xxTf
break; P et0yH
SortUtil.swap(queue,j,k); _4owxYSDke
k = j; <2diO=
} }c|Xr^
} A"I:cw"KY
V\PGk<VO
} 0>4:(t7h\
$}aLFb
} q,^^c1f
3Q~ng2Wv%
SortUtil： puL1A?Y8UM
|0B h
package org.rut.util.algorithm; 0kQAT#
N02N w(pi
import org.rut.util.algorithm.support.BubbleSort; Q6RBZucv
import org.rut.util.algorithm.support.HeapSort; kE UfQLbn
import org.rut.util.algorithm.support.ImprovedMergeSort; Goz9"yazg
import org.rut.util.algorithm.support.ImprovedQuickSort; ;?yd;GOt)
import org.rut.util.algorithm.support.InsertSort; "[BuQ0(g
import org.rut.util.algorithm.support.MergeSort; Kv{i_%j
import org.rut.util.algorithm.support.QuickSort; w \i#
import org.rut.util.algorithm.support.SelectionSort; Hl?\P6
import org.rut.util.algorithm.support.ShellSort; #8%Lc3n
'?v.O}
/** ^B1Q";# B^
* @author treeroot +*DXzVC
* @since 2006-2-2 }a'8lwF%I
* @version 1.0 wP+wA}SN
*/ BB|w-W=Kd
public class SortUtil { d; oaG (e
public final static int INSERT = 1; p(v+j_ak
public final static int BUBBLE = 2; \H*"UgS
public final static int SELECTION = 3; %=]~5a9
public final static int SHELL = 4; Jf|J":S
public final static int QUICK = 5; F[l{pc "C
public final static int IMPROVED_QUICK = 6; SH<Nt[8C
public final static int MERGE = 7; F9]GEBLr
public final static int IMPROVED_MERGE = 8; elJLTG
public final static int HEAP = 9; DKF`uRvGN:
<lB^>Hfu
public static void sort(int[] data) { U5Q `r7
sort(data, IMPROVED_QUICK); 7$\;G82_
} wX<)Fj'
private static String[] name={ hJkIFyQ{j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" IyL2{5
}; ^bexXYh
rKg5?.
private static Sort[] impl=new Sort[]{ <Ktx*(D
new InsertSort(), k,0JW=Vh>|
new BubbleSort(), cIw)ScY
new SelectionSort(), =Mc*~[D/
new ShellSort(), `CUTb*{`
new QuickSort(), rMH\;\ I|U
new ImprovedQuickSort(), 3*/y<Z'H
new MergeSort(), (m|p|rL
new ImprovedMergeSort(), "/(J*)%{
new HeapSort() Oq|RMl
}; ("}TW-r~
}(hx$G^M
public static String toString(int algorithm){ :;#^h]Q
return name[algorithm-1]; KWLI7fTgj$
} Pn[-{nz
T5=3 jPQ
public static void sort(int[] data, int algorithm) { N*f?A$u/I
impl[algorithm-1].sort(data); {<v?Z_!68
} `&LPqb
l <Tkg9
public static interface Sort { =d!3_IZ
public void sort(int[] data); ^GD"aerNr
} O8wR#(/
V) a<)
public static void swap(int[] data, int i, int j) { :tl*>d~
int temp = data; P bj&l0C
data = data[j]; D2#3fM6
data[j] = temp; &_x:+{06
} \3"4;fM!i
} }:])1!a