[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; 4g^+y.,r_f
} pC.T)k
int i1=l; eu|q {p
int i2=mid+1; =]mx"0i[
for(int cur=l;cur<=r;cur++){ !l~aRj-WZ
if(i1==mid+1) Nn7@+g)
data[cur]=temp[i2++]; |(ju!&
else if(i2>r) (eE}W~Z
data[cur]=temp[i1++]; %~(i[Ur;
else if(temp[i1] data[cur]=temp[i1++]; }? '9L:
else _Vf|F
data[cur]=temp[i2++]; ffd3QQ
} :%oj'm44!
} O;t?@!_
ga9:*G!b{)
} myX0<j3G5
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改进后的归并排序: kU>|E<c*
0\^2HjsJ
package org.rut.util.algorithm.support; ,T[ +omo
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import org.rut.util.algorithm.SortUtil; C}EDl2
r@UY$z
/** C2i..iD
* @author treeroot =_6h{f&Q
* @since 2006-2-2 ~o5iCt;w
* @version 1.0 9?,.zc^
*/ ]}y'3aW
public class ImprovedMergeSort implements SortUtil.Sort { ^}\R]})w"
x}j41E}
private static final int THRESHOLD = 10; 0J</`/gH
N0hU~|/
/* `I{Q,HQ7
* (non-Javadoc) Xe+FMbBco
* ?{")Wt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [i#Gqx>'w
*/ 8QBL:7<
public void sort(int[] data) { xhS/X3<th
int[] temp=new int[data.length]; T bWZw
mergeSort(data,temp,0,data.length-1); PaJwM%s)L
} [ Ulo; #P
@1Lc`;Wd
private void mergeSort(int[] data, int[] temp, int l, int r) { ^uzVz1%mM
int i, j, k; 1]`HX=cl
int mid = (l + r) / 2; <Rt@z|Zv
if (l == r) RVx<2,['
return; #ySx$WT;
if ((mid - l) >= THRESHOLD) zSCPp6
mergeSort(data, temp, l, mid); zxdO3I
else Ij_`=w<
insertSort(data, l, mid - l + 1); J)NpG9iN
if ((r - mid) > THRESHOLD) u)pBFs<dn
mergeSort(data, temp, mid + 1, r); WQL`;uIX
else cf!R
insertSort(data, mid + 1, r - mid); #9Z-Hd<
iKY&gnu"
for (i = l; i <= mid; i++) { ,cEcMaJ
temp = data; $0t %}DE
} `_)dEu
for (j = 1; j <= r - mid; j++) { @eWx4bl
temp[r - j + 1] = data[j + mid]; -Ma"V
} >m!.l{*j>N
int a = temp[l]; 8{u01\0}
int b = temp[r]; {{,%p#/b
for (i = l, j = r, k = l; k <= r; k++) { cpVi9]
if (a < b) { hg @Jpg
data[k] = temp[i++]; YSif`W!
a = temp; wBET.l'd
} else { i\G3 u#
data[k] = temp[j--]; u'p J9>sC
b = temp[j]; JhcS
} Y)`+u#` R
} lOui{QU
} kn\>ZgU
i?>"}h
/** >@"j9
* @param data VA0TY/{ ]
* @param l uOQ5.S+
* @param i ;Yj}9[p;T
*/ N+\*:$>zt6
private void insertSort(int[] data, int start, int len) { ( nh!tC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;IT^SHym
} 3jNcL{
} -AX3Rnv^!
} #lO;G k{
} }5k"aCno
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堆排序： Hpt)(Nz:
jnTl%aQYc
package org.rut.util.algorithm.support; ^tv*I~>J!
')BQ 0sg
import org.rut.util.algorithm.SortUtil; `Ao:}
YblRwic
/** '|Oi#S
* @author treeroot EY>A(
* @since 2006-2-2 =N=,;<6%A
* @version 1.0 4nY2v['m0
*/ y?rsfIth`
public class HeapSort implements SortUtil.Sort{ O^f@ g l
sLTf).xh
/* (non-Javadoc) b,cvQD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4_mh
*/ u7/M>YJ`T
public void sort(int[] data) { L+,{*Uj[;
MaxHeap h=new MaxHeap(); [J^,_iN[.
h.init(data); :70oO}0m.
for(int i=0;i h.remove(); f5G17: Q
System.arraycopy(h.queue,1,data,0,data.length); #C+0m`
} 3{%/1>+x5
8\yH7H
private static class MaxHeap{ u%|VmM>
!XFN/-Q ,
void init(int[] data){ FSM~Rl
this.queue=new int[data.length+1]; YB 4R8}4
for(int i=0;i queue[++size]=data; m:h]nm
fixUp(size); l"cYW9
} Dk4Wj"LS
} 7 724,+2N
mV;7SBoT
private int size=0; _|*j8v3
We" "/X
private int[] queue; )N}xKw|
}x%"Oq|2]x
public int get() { Oe5aNo
return queue[1]; p0@iGyd
} 4TLh'?Xu9
0xPML}|V
public void remove() { Jus)cO#I
SortUtil.swap(queue,1,size--); /knt5
fixDown(1); 4gYP .h:,
} 0[PP-]JS
file://fixdown bT8BJY%+
private void fixDown(int k) { J+9D/VT
int j; QZDGk4GG
while ((j = k << 1) <= size) { sT/pA^rnnR
if (j < size %26amp;%26amp; queue[j] j++; v+\E%H
if (queue[k]>queue[j]) file://不用交换 !D
break; $H_4Y-xOi
SortUtil.swap(queue,j,k); s&c^Wr
k = j; / {A]('t
} #|'8O
} Q,s,EooIx
private void fixUp(int k) { l]%|w]i\
while (k > 1) { `_f3o,5
int j = k >> 1; 6z/8nf +u
if (queue[j]>queue[k]) 1Og9VG1^
break; <,LeFy\zW
SortUtil.swap(queue,j,k); UH[ YH;3O
k = j; s$RymM
} 3 \kT#nr
} 1pcSfN:"1
IQH;`+
} YrB-;R1+
M>0~Ek%3
} TsR20P@
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SortUtil： SH5k^EJ
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package org.rut.util.algorithm; IPJs$PtKok
|FKo}>4
import org.rut.util.algorithm.support.BubbleSort; Gk!v-h9cq
import org.rut.util.algorithm.support.HeapSort; #?aR,@n
import org.rut.util.algorithm.support.ImprovedMergeSort; 8o~\L= l
import org.rut.util.algorithm.support.ImprovedQuickSort; F.O2;M|x
import org.rut.util.algorithm.support.InsertSort; T nPC\.x
import org.rut.util.algorithm.support.MergeSort; |>[w$
import org.rut.util.algorithm.support.QuickSort; ytJ |jgp'
import org.rut.util.algorithm.support.SelectionSort; GF k?Qf{u
import org.rut.util.algorithm.support.ShellSort; mV^dIm
n)pBK>+
/** 0{Tf;a<
* @author treeroot 7\jH?Zi
* @since 2006-2-2 OxqP:kM
* @version 1.0 `5x,N%9{
*/ u} KiSZxt
public class SortUtil { +LrW#K;
public final static int INSERT = 1; {\ .2h
public final static int BUBBLE = 2; ,kLeK{
public final static int SELECTION = 3; SqEO ]~
public final static int SHELL = 4; A~h8 >zz*
public final static int QUICK = 5; slw^BK3t
public final static int IMPROVED_QUICK = 6; W&rjJZY6
public final static int MERGE = 7; m.lNKIknQ
public final static int IMPROVED_MERGE = 8; 6W3}6p
public final static int HEAP = 9; />]/At
0k3^+#J
public static void sort(int[] data) { heRQ|n.Dz)
sort(data, IMPROVED_QUICK); 8lbNw_U
} CVu'uyy
private static String[] name={ ncihc$V<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]jM D'vg^b
}; q!NwfXJM
t6LTGWs/_o
private static Sort[] impl=new Sort[]{ .o fYFK
new InsertSort(), <$ '#@jW
new BubbleSort(), S,J'Z:spf
new SelectionSort(), na%9E8;:&v
new ShellSort(), oq;}q
new QuickSort(), JlGyGr^MD
new ImprovedQuickSort(), hj9bMj
new MergeSort(), eeuAo&L&
new ImprovedMergeSort(), b$g.">:$
new HeapSort() 0z\=uQ0
}; W*VQ"CW{^]
gSC8qip
public static String toString(int algorithm){ idz6m]{~yT
return name[algorithm-1]; '?Hy"5gUA
} ];oED?I
Jb_/c``
public static void sort(int[] data, int algorithm) { a#KxjVM
impl[algorithm-1].sort(data); QULrE+@
} ;Q-sie(#
w)3LYF
public static interface Sort { |RHX2sso
public void sort(int[] data); j^:\a\-1
} >iaZGXje
w[loV
public static void swap(int[] data, int i, int j) { ]}C#"Xt
int temp = data; |1rBK.8
data = data[j]; 5tQffo8t
data[j] = temp; $g5pKk
} G=\rlH]N
} Ho*S>Y