[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; 3lyQn"
} _i.({s&_9
int i1=l; tc5M$b3^2
int i2=mid+1; AtuZF
for(int cur=l;cur<=r;cur++){ wbl${@4
if(i1==mid+1) 8\P JSr
data[cur]=temp[i2++]; e=-YP8l
else if(i2>r) \S'cWB
data[cur]=temp[i1++]; oNrEIgaA(+
else if(temp[i1] data[cur]=temp[i1++]; Ep,1}Dx
else Za34/ro/T
data[cur]=temp[i2++]; -wBnwn-
} Y<de9Z@
} IZ|c<#r6
dV$3u"9
} "C?:T'dW
rkbl/py
改进后的归并排序: 1k0^6gE|
M3)v-"
package org.rut.util.algorithm.support; R<_mK33hd
,7QBJ_-;QJ
import org.rut.util.algorithm.SortUtil; 3s#|Y,{?6R
@_G` Ok4
/** B<rPvM7a
* @author treeroot rrW! X q
* @since 2006-2-2 `9]P/J^
* @version 1.0 1g+LF[*-~
*/ (tgEa{rPAP
public class ImprovedMergeSort implements SortUtil.Sort { g2!0vB>
u;$I{b@M]
private static final int THRESHOLD = 10; e1:u1(".
v4X_v!CQ
/* d5N)^\z
* (non-Javadoc) ;&/sj-xJ2
* p.qrf7N$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 30t:O&2<
*/ +'!h-x1y~
public void sort(int[] data) { :17ee
int[] temp=new int[data.length]; Yjpb+}
mergeSort(data,temp,0,data.length-1); ;|2Uf
} C+}CU}
cq-e c7
private void mergeSort(int[] data, int[] temp, int l, int r) { *G8'Fjin'T
int i, j, k; Qf/j:
int mid = (l + r) / 2; 39'X$!
if (l == r) 7)g;Wd+H
return; "4J?JR
if ((mid - l) >= THRESHOLD) wOD/Z8
mergeSort(data, temp, l, mid); X%RQB$
else PEMxoe<+
insertSort(data, l, mid - l + 1); +#&el//
if ((r - mid) > THRESHOLD) 0V{>)w!Fo
mergeSort(data, temp, mid + 1, r); =?y^O0v
else l6r%nHP@
insertSort(data, mid + 1, r - mid); [N'r3
d#x8O4S%i2
for (i = l; i <= mid; i++) { nhB^Xr=
temp = data; 37.)@
} y}3 `~a
for (j = 1; j <= r - mid; j++) { yYVW"m
temp[r - j + 1] = data[j + mid]; }])GQ@
} O~7p^i}
int a = temp[l]; 11nO<WH
int b = temp[r]; C@l +\M(
for (i = l, j = r, k = l; k <= r; k++) { Zw3hp,P]
if (a < b) { tyBg7dP
data[k] = temp[i++]; F(0pru4u
a = temp; a,en8+r]
} else { #c8"
data[k] = temp[j--]; C?_t8G./_
b = temp[j]; &utS\-;G
} Pl`Bd0
} s>[vT?
} >KH(nc$
!XG/,)A
/** {&6l\|
* @param data V}3~7(
* @param l 6%Cna0x:&
* @param i $~;6hnrm
*/ _R>s5|_
private void insertSort(int[] data, int start, int len) { Y9lbf_51
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *,Aa9wa{
} fSgGQ D4
} 0 /D5
} IJL^dXCu
} [kU[}FT
gwkZk-f\p
堆排序： S1 R #]
g[uE@Gaj&
package org.rut.util.algorithm.support; x<)!$cg
?CL z@u~
import org.rut.util.algorithm.SortUtil; _&8KB1~
)^QG-IM
/** F~11 _
* @author treeroot TLR Lng
* @since 2006-2-2 {d{WMq$
* @version 1.0 kC,DW%Ls
*/ 1{Sx V
public class HeapSort implements SortUtil.Sort{ d@`-!"
qrORP3D@
/* (non-Javadoc) }VJ hw*s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ezo" f
*/ 3 8ls 4v3
public void sort(int[] data) { )aO!cQ{s
MaxHeap h=new MaxHeap(); -&HoR!af
h.init(data); "1pZzad
for(int i=0;i h.remove(); b W`)CWd
System.arraycopy(h.queue,1,data,0,data.length); `s|\"@2
} k-t,y|N
+eH=;8
private static class MaxHeap{ (\AszLW
iIC9rso"Q1
void init(int[] data){ U iPVZ@?
this.queue=new int[data.length+1]; f/|a?n2\hm
for(int i=0;i queue[++size]=data; }T^v7 LY
fixUp(size); h;mQ%9 Yd
} )gm\e?^
} ek_i{'hFd
d,E/9y\e
private int size=0; kB!M[[t
aNh1e^j
private int[] queue; ygu?w7
'~!l(&X
public int get() { +&@l{x(,
return queue[1]; RM/ s:
} 9EY_R&Yq%
jDkc~Wwa
public void remove() { vzgudxG'z
SortUtil.swap(queue,1,size--); pQ6t]DJ4
fixDown(1); U7Sl@-#|
} %%H. &*i,
file://fixdown itvy[b-*
private void fixDown(int k) { kk>0XPk
int j; ".7KEnx
while ((j = k << 1) <= size) { DNTRLIKa
if (j < size %26amp;%26amp; queue[j] j++; 8~XI7g'5x
if (queue[k]>queue[j]) file://不用交换 {pi67"mYp
break; B3i=pcef
SortUtil.swap(queue,j,k); q'U-{~q%
k = j; H#d! `
} j4hUPL7
} ,4?|}xg
private void fixUp(int k) { hJL0M!
while (k > 1) { rea}Uq+po
int j = k >> 1; qy0_1xT-
if (queue[j]>queue[k]) 1\9BO:<K
break; 1pBsr(
SortUtil.swap(queue,j,k); iH -x
k = j; %nK15(
} S7~l%G>]b
} nD{;4$xP`
5=;I|l,
} `J;/=tf09
Zm'::+tl
} wBaFC\CW
4~J1pcBno%
SortUtil： /$N#_Xblr
JT+lWhy
package org.rut.util.algorithm; $1`t+0^k
lKD<
import org.rut.util.algorithm.support.BubbleSort; b|C,b"$N0
import org.rut.util.algorithm.support.HeapSort; XdXS^QA.s
import org.rut.util.algorithm.support.ImprovedMergeSort; ^i,0n}>
import org.rut.util.algorithm.support.ImprovedQuickSort; F[qIfh4
import org.rut.util.algorithm.support.InsertSort; YuZ
import org.rut.util.algorithm.support.MergeSort; ?p\II7
import org.rut.util.algorithm.support.QuickSort; 7m)ykq:?
import org.rut.util.algorithm.support.SelectionSort; 7=[O6<+o
import org.rut.util.algorithm.support.ShellSort; J!gWRw5
%)@(Tye -
/** 7]+'%Uwu)
* @author treeroot t~=@r9`S
* @since 2006-2-2 IF21T
* @version 1.0 G6g=F+X2
*/ "I1M$^8n
public class SortUtil { in|7ucSlg
public final static int INSERT = 1; At_Y$N:
public final static int BUBBLE = 2; s)ajy^6'M
public final static int SELECTION = 3; 1$!K2=%OXj
public final static int SHELL = 4; @9Pn(fd]
public final static int QUICK = 5; aLo>Yi
public final static int IMPROVED_QUICK = 6; 61;5Yo
public final static int MERGE = 7; Wn</",Gf
public final static int IMPROVED_MERGE = 8; 1OGv+b)
public final static int HEAP = 9; g KY ,G
wEn&zZjx
public static void sort(int[] data) { ktJLpZ<0O
sort(data, IMPROVED_QUICK); 79fyn!Iz<
} BY2txLLB
private static String[] name={ a[9OtZX<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uS10P7N}
}; 9>Z#o<*_/
])";Z
private static Sort[] impl=new Sort[]{ YQd&rkr
new InsertSort(), bI0+J)
new BubbleSort(), ~Am %%$
new SelectionSort(), CAObC%
new ShellSort(), {Ao^3vB
new QuickSort(), "f$A0RL
new ImprovedQuickSort(), OnPLz"-
new MergeSort(), ue2nfp
new ImprovedMergeSort(), hA19:H=7R0
new HeapSort() m!>'}z
}; bWzc=03
-m-WUox4"
public static String toString(int algorithm){ t|XC4:/>T
return name[algorithm-1]; by3kfY]4s
} d-2I_ )9
qMj e,Y
public static void sort(int[] data, int algorithm) { e?fjX-
impl[algorithm-1].sort(data); KFrmH
} AxQ/
nff]Y$FB
public static interface Sort { q\=[v
public void sort(int[] data); 5~6y.S
} 9Qd'=JQl
O&RHCR-\
public static void swap(int[] data, int i, int j) { >R0j<:p :
int temp = data; ?(hQZR 0e
data = data[j]; f }e7g d]M
data[j] = temp; `I<|*vW u
} #FM 'S|
} 25KZe s)