[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; -\O%f)R
} H3"90^|,@
int i1=l; B~K@o.%
int i2=mid+1; 1|_jV7`Mz
for(int cur=l;cur<=r;cur++){ r9G}[#DO
if(i1==mid+1) xPoI+,
data[cur]=temp[i2++]; MA0}BJoW
else if(i2>r) o,dO.isgh>
data[cur]=temp[i1++]; ~UA:_7#\M
else if(temp[i1] data[cur]=temp[i1++]; +L D\~dcV+
else x8YuX*/I
data[cur]=temp[i2++]; 'o;>6u<u
} V+myGsr`
} oh c/{D2
4n_f7'GZg
} Goa0OC,
D=uU:7m
改进后的归并排序: g/e\EkT
2MaHD}1Jw
package org.rut.util.algorithm.support; wN'Q\l+
?.Z4GWyXa
import org.rut.util.algorithm.SortUtil; <3i2(k
;/T=ctIs
/** N) D;)ZH
* @author treeroot n\Y{?x
* @since 2006-2-2 Gxx:<`[ON
* @version 1.0 ^GMM%
*/ &qKJN#NM@
public class ImprovedMergeSort implements SortUtil.Sort { V`Ve__5;
!cS A|C
private static final int THRESHOLD = 10; C{AVV<
WfYu-TK*
/* VX#4Gh,~N
* (non-Javadoc) 7~(|q2ib
* fR[kjwX)<1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) naE;f)
*/ d(!W
public void sort(int[] data) { SKO*x^"eU
int[] temp=new int[data.length]; ,?s3%<\2
mergeSort(data,temp,0,data.length-1); $*a'[Qot#
} ^UTQcm
Hq=5/N
private void mergeSort(int[] data, int[] temp, int l, int r) { pV`?=[h9
int i, j, k; MD`1KC_m
int mid = (l + r) / 2; (0Buo#I
if (l == r) )1f8 H,q^
return; C8 [W
if ((mid - l) >= THRESHOLD) h~|B/.[R:3
mergeSort(data, temp, l, mid); )w\E^
else {Yp>h5nwM_
insertSort(data, l, mid - l + 1); it?l! ~
if ((r - mid) > THRESHOLD) ^W}(]jL
mergeSort(data, temp, mid + 1, r); #J&45
else \H <k
insertSort(data, mid + 1, r - mid); Y v22,|:
rZ}y'A
for (i = l; i <= mid; i++) { c!#DD;<Q
temp = data; rfj>/?8!@
} i%RN0UO^
for (j = 1; j <= r - mid; j++) { mFoE2?Y
temp[r - j + 1] = data[j + mid]; =^
} c~j")o
int a = temp[l]; !\D[lh}rL
int b = temp[r]; <i}lP/U
for (i = l, j = r, k = l; k <= r; k++) { 8bl&-F`
if (a < b) { Y [8~M8QX
data[k] = temp[i++]; .C$4jR.KC
a = temp; J~dk4D\
} else { lI#Ap2@
data[k] = temp[j--]; iBlZw%zKP
b = temp[j]; Qy!*U%tG'
} yc ize2>q
} &,vPZ,7l
} .8[Uk^q
/q.iUwSK>
/** E=PmOw7b
* @param data -1^dOG6*
* @param l dS9L(&
* @param i YXeL7W
*/ EtVRnI@
private void insertSort(int[] data, int start, int len) { M3>c?,O)J
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~ti{na4W<
} JQSp2b@'H
} )L^GGy8w
} |#uA(V
} @JFfyQ {-
-44{b<:D
堆排序： kTJz .
GJ1ap^k
package org.rut.util.algorithm.support; l]:nncpns
2|2'?
import org.rut.util.algorithm.SortUtil; 0xv@l^B
!aylrJJ
/** u7L!&/6On
* @author treeroot T&@xgj|!)
* @since 2006-2-2 WKjE^u
* @version 1.0 d5aG6/
*/ ){'Ef_/R
public class HeapSort implements SortUtil.Sort{ Z1@E
0M[O(.x
/* (non-Javadoc) 70sb{)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %5) 1^
*/ R1CoS6
public void sort(int[] data) { L?[NXLn+
MaxHeap h=new MaxHeap(); #ZFedK0vv
h.init(data); ]I pLF#
for(int i=0;i h.remove(); Y`secUg
System.arraycopy(h.queue,1,data,0,data.length); 3}U {~l!K
} }a=<Gl|I;w
@(k}q3b<
private static class MaxHeap{ 2@&|/O6_\h
RXo!K iQO
void init(int[] data){ j%7N\Vb
this.queue=new int[data.length+1]; tXlo27J
for(int i=0;i queue[++size]=data; 1Z. D3@
fixUp(size); hT c VMc
} gmFCjs
} soSdlV{
/iz{NulOz*
private int size=0; /Mac:;W`
D/& 8[Z/Cn
private int[] queue; iR_j h=2{
x:Mh&dq?
public int get() { -o\o{?t,
return queue[1]; '{e9Vh<x
} G6l:El&
*<.{sx^Gk
public void remove() { C2$_Ad=s
SortUtil.swap(queue,1,size--); y,D@[*~Xb
fixDown(1); +0{$J\s
} ]VuB2L[D
file://fixdown O/Q7{5n
private void fixDown(int k) { wNNInS6
int j; Q~p)@[q
while ((j = k << 1) <= size) { 25:[VH$:4
if (j < size %26amp;%26amp; queue[j] j++; T4 :UJj}
if (queue[k]>queue[j]) file://不用交换 )9oF?l^q
break; tBJCfM
SortUtil.swap(queue,j,k); H8$l }pOz
k = j; CxvL!ew
} yJyovfJz.
} @e`%'
private void fixUp(int k) { REEs}88);'
while (k > 1) { FabDK :
int j = k >> 1; U,;a+z4\
if (queue[j]>queue[k]) Z4&,KrV
break; q?&Ap*
SortUtil.swap(queue,j,k); &oU) ,H
k = j; B^;G3+}
} 6"OwrJB
} \B72 #NR
iZ^tLnc
} n5Coxvy1
0.MD_s0)>
} IjshxNk
/b|V=j}W
SortUtil： nM=5L:d
d*}dM"
package org.rut.util.algorithm; n8FmIoZ&`
L6>;"]:f`
import org.rut.util.algorithm.support.BubbleSort; "7G>
import org.rut.util.algorithm.support.HeapSort; u!]g^r
import org.rut.util.algorithm.support.ImprovedMergeSort; E}YJGFB7"
import org.rut.util.algorithm.support.ImprovedQuickSort; w<qn@f
import org.rut.util.algorithm.support.InsertSort; [Dzd39aKr
import org.rut.util.algorithm.support.MergeSort; t\\oGH
import org.rut.util.algorithm.support.QuickSort; ZqONK^
import org.rut.util.algorithm.support.SelectionSort; PU& v{gn
import org.rut.util.algorithm.support.ShellSort; B4l*]K%
26e.Hu
/** J*!_kg)>J
* @author treeroot 55%j$f
* @since 2006-2-2 aa-{,X"MF
* @version 1.0 MAv-`8@|
*/ e$vvmbK.
public class SortUtil { 4~s{zob
public final static int INSERT = 1; E]aQK.
public final static int BUBBLE = 2; ?KB+2]7m6
public final static int SELECTION = 3; uG\ @e'pr
public final static int SHELL = 4; Ro2Ab^rQ|
public final static int QUICK = 5; fRt`]o:Om
public final static int IMPROVED_QUICK = 6; Ad:}i9-x
public final static int MERGE = 7; {E 'go]
public final static int IMPROVED_MERGE = 8; hOOkf mOM
public final static int HEAP = 9; ?"+g6II
cZb5h 9
public static void sort(int[] data) { >.xgo6
sort(data, IMPROVED_QUICK); rDD,eNjG
} }ldOxJSB?
private static String[] name={ ;2&ym)`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N=vb*3ECg
}; _nn\O3TB
0%W0vTvL
private static Sort[] impl=new Sort[]{ 'joc8o sS
new InsertSort(), @5=2+ M
new BubbleSort(), ZUA%ZkX=F
new SelectionSort(), 5#WyI#YNG
new ShellSort(), ?D\6@G:,#@
new QuickSort(), q{c/TRp7
new ImprovedQuickSort(), }hm"49,O
new MergeSort(), X2PyFe
new ImprovedMergeSort(), Gg,&~ jHib
new HeapSort() mw!EDJ;'
}; c}-WK*v
>V,i7v*?
public static String toString(int algorithm){ Z=I+_p_G
return name[algorithm-1]; jYxmU8
} qQ{i2D%)?f
+YX*.dW
public static void sort(int[] data, int algorithm) { xY=%+o.?*
impl[algorithm-1].sort(data); LQo>wl
} > &VY
I'%\ E,
public static interface Sort { x%`.L6rj
public void sort(int[] data); \F; S
} 5bZjW~d
&tjv.t
public static void swap(int[] data, int i, int j) { 4b@Awtk
int temp = data; O:J;zv\
data = data[j]; Cqra\
data[j] = temp; @p\te7(P%
} 5*#3v:l/9
} +lNAog