[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; j8L!miv6
} Z6A*9m
int i1=l; R/xeC [r
int i2=mid+1; ( {5LB4
for(int cur=l;cur<=r;cur++){ X^eTf-*T
if(i1==mid+1) JZ]4?_l
data[cur]=temp[i2++]; Kbrb;r59
else if(i2>r) [n44;
data[cur]=temp[i1++]; iE!\)7y
else if(temp[i1] data[cur]=temp[i1++]; z*"zXLC
else yk,o*g
data[cur]=temp[i2++]; E~3wdOZv1
} a4Fe MCvV9
} 4(f[Z9 iZ]
w =^QIr%
} C%9;~S
c-(,%0G0
改进后的归并排序: Xk8+m>
O=?WI
package org.rut.util.algorithm.support; /Q8E12
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import org.rut.util.algorithm.SortUtil; '%vb&a!.6
[kM)K'-
/** ?~Fk_#jz,@
* @author treeroot [I^>ji0V
* @since 2006-2-2 Gt3V}"B3\
* @version 1.0 F#*vJb)
*/ /'ccFm2
public class ImprovedMergeSort implements SortUtil.Sort { >7[. {Y
u%3D{Dj
private static final int THRESHOLD = 10; <C`qJP-
e)]9u$x
/* 7O^ySy"l
* (non-Javadoc) $!)Sgb
* !o1{. V9q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $1y8gm
*/ -!f)P=S
public void sort(int[] data) { .&:y+Oww~
int[] temp=new int[data.length]; ~za=yZo7(
mergeSort(data,temp,0,data.length-1); 7=(rk
} XkLl(uyh
AIgJ,=9K
private void mergeSort(int[] data, int[] temp, int l, int r) { W ZdEfY{
int i, j, k; 2oyTS*2u_&
int mid = (l + r) / 2; SR7$m<0t*
if (l == r) xOnbYU
return; 3z';Zwz &X
if ((mid - l) >= THRESHOLD) azF|L"-RP
mergeSort(data, temp, l, mid); /`McKYIP
else S{'/=Px+
insertSort(data, l, mid - l + 1); G5a PjP
if ((r - mid) > THRESHOLD) yV[9 (
mergeSort(data, temp, mid + 1, r); \n$s5i-
else Ysbd4rN
insertSort(data, mid + 1, r - mid); o=@0Bd8
2[6>h)
for (i = l; i <= mid; i++) { {G$I|<MD2T
temp = data; $8zsqd 4?
} })RT2zw}
for (j = 1; j <= r - mid; j++) { Z^5j.d{e$
temp[r - j + 1] = data[j + mid]; q_S`@2Dzz,
} H<T9$7Yr%r
int a = temp[l]; 9c9FC
int b = temp[r]; k]?M^jrm
for (i = l, j = r, k = l; k <= r; k++) { aV"K%#N
if (a < b) { xEdCGwgp#
data[k] = temp[i++]; ii&{gC
a = temp; GPlAQk
} else { tVVnQX
data[k] = temp[j--]; AE0d0Y~9
b = temp[j]; AKs=2N>7
} 7oaa)
} 5dOA^P@`,M
} juOOD
DE"KbA0}
/** BMPLL2I
* @param data SxV(.i'
* @param l . +_IpygQ
* @param i )P4#P2
*/ ~um+r],@@
private void insertSort(int[] data, int start, int len) { .Rl58]x~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Bfhw0v]Z
} k<W n
} kcT?<r
} 8qwc]f$.w
} &X0/7)*"v
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堆排序： E-h`lDoJ
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package org.rut.util.algorithm.support; pl62mp!
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import org.rut.util.algorithm.SortUtil; |rJ_
mtDRF'>P:
/** 48,Aq*JFw
* @author treeroot f:iK5g
* @since 2006-2-2 PRmZ3
* @version 1.0 )Y':u_Lo
*/ $s2Ty1
public class HeapSort implements SortUtil.Sort{ "aNl2T
T=7V+
/* (non-Javadoc) xo{f"8}^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EFeG[bxM
*/ 4f,D3e%T|
public void sort(int[] data) { Bm%.f!`
MaxHeap h=new MaxHeap(); .XM3oIaW
h.init(data); $IUP;
for(int i=0;i h.remove(); 9R.IYnq
System.arraycopy(h.queue,1,data,0,data.length); Zrfp4SlZZ
} rC]jz$sle
rN? L8
private static class MaxHeap{ 6suB!XF;
A?Jm59{w
void init(int[] data){ e2w$":6>
this.queue=new int[data.length+1]; ~h-G
for(int i=0;i queue[++size]=data; g#FqjE|mx
fixUp(size); uE:#m.Q
} n`f},.NM|
} Q(m} Sr4
DoWY*2E
private int size=0; (_]{[dFr%
]!H*oP8a*
private int[] queue; %_+9y??
Z91gAy^z<
public int get() { #m 3WZ3t$
return queue[1]; j-$aa;
} `g%]z@'+?
|w[}\#2
public void remove() { W"Dj+/uS
SortUtil.swap(queue,1,size--); mh44
fixDown(1); S}e*~^1J
} qM@][]j:
file://fixdown )?'sw5C
private void fixDown(int k) { &dvJg
int j; tZ>>aiI3
while ((j = k << 1) <= size) { +YT/od1t7
if (j < size %26amp;%26amp; queue[j] j++; Ndi'b_Sh\
if (queue[k]>queue[j]) file://不用交换 4M(w<f\5F
break; 5`oor86
SortUtil.swap(queue,j,k); nL^6{I~
k = j; v)N6ZOj*C
} DS>s_3V
} mUr@w*kq|p
private void fixUp(int k) { EBzg<-?o
while (k > 1) { @babgP,
int j = k >> 1; SfJ/(q
if (queue[j]>queue[k]) UkNC|#l)
break; $$ _uQf
SortUtil.swap(queue,j,k); e_]1e7t
k = j; ~\<ZWU<BE
} *-+~H1tP
} %n}fkj'
NL&g/4A[a
} XP2=x_"y
1:YDN.*
} yF0,}
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SortUtil： |nry^zb
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package org.rut.util.algorithm; w?M*n<) O
e@]cI/j
import org.rut.util.algorithm.support.BubbleSort; 7M;Y#=sR
import org.rut.util.algorithm.support.HeapSort; N0 ?O*a
import org.rut.util.algorithm.support.ImprovedMergeSort; 8"8{Nf-"
import org.rut.util.algorithm.support.ImprovedQuickSort; Qg6m
import org.rut.util.algorithm.support.InsertSort; D4#,9?us
import org.rut.util.algorithm.support.MergeSort; <S$y=>.9
import org.rut.util.algorithm.support.QuickSort; l'16B^
import org.rut.util.algorithm.support.SelectionSort; k})9(Sy~
import org.rut.util.algorithm.support.ShellSort; y_$^Po
fE7WLV2I>
/** #i2q}/w5`C
* @author treeroot k}T~N.0
* @since 2006-2-2 LiV]!*9$KG
* @version 1.0 mz\m^g3
*/ kI[EG<N1k
public class SortUtil { H50nR$$<*Y
public final static int INSERT = 1; 3J,/bgL5
public final static int BUBBLE = 2; J.?p?-"
public final static int SELECTION = 3; ?N|PgNu X
public final static int SHELL = 4; ["L?t ^*G
public final static int QUICK = 5; R:ar85F
public final static int IMPROVED_QUICK = 6; 0]HK(,/h
public final static int MERGE = 7; n,HWVo>([
public final static int IMPROVED_MERGE = 8; .FMF0r>l
public final static int HEAP = 9; IB;y8e,
(U.&[B
public static void sort(int[] data) { @~N#)L^
sort(data, IMPROVED_QUICK); A,=l9hE'
} n--`zx-['
private static String[] name={ dO8Z {wfs
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /:USpuu
}; 9QX{b+}"e
X@D3
private static Sort[] impl=new Sort[]{ A6U6SvM;
new InsertSort(), n&V(c&C
new BubbleSort(), e4`KnHsL
new SelectionSort(), #{?oUg>$
new ShellSort(), *l9Y]hinq
new QuickSort(), <kM%z{p
new ImprovedQuickSort(), c`jTdVD
new MergeSort(), >qgBu_
new ImprovedMergeSort(), #tfJ?w`
new HeapSort() hs*:!&E
}; Ux<h` s
dJ;;l7":~
public static String toString(int algorithm){ $fn^i.
return name[algorithm-1]; l3MH+o
} pKJ[e@E^
0y1t%C075
public static void sort(int[] data, int algorithm) { =1JRu[&]8
impl[algorithm-1].sort(data); xAO]u[J
} v|'N|k l
%B?5l^W@
public static interface Sort { tsa6: D
public void sort(int[] data); ynd}w G'
} s1FBz)yCY=
E:tUbWVp
public static void swap(int[] data, int i, int j) { NR [VGZj
int temp = data; -Tt}M#W
data = data[j]; Y\=:j7'
data[j] = temp; 0CR;t`M@
} #}Cwn$
} pJ(l=a