[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; `=7j$#6U
} ;j2vHU#q-
int i1=l; Qyy.IPTP
int i2=mid+1; kY'T{Sm1^
for(int cur=l;cur<=r;cur++){ ]5%/3P,/
if(i1==mid+1) }- Wa`t7U
data[cur]=temp[i2++]; "+unS)M;Y
else if(i2>r) ;t+ub8
data[cur]=temp[i1++]; jbR0%X2
else if(temp[i1] data[cur]=temp[i1++]; '? jlH0;
else jMpD+Mb
data[cur]=temp[i2++]; 0>zbCubPH
} H'HSD,>(
} U#U]Pt
]n-:Yv5 W
} 9Vf1Xz
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改进后的归并排序: 0 Us5
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package org.rut.util.algorithm.support; cYqfsd# B
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import org.rut.util.algorithm.SortUtil; $HJwb-I
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/** GaSPJt
* @author treeroot 85GKymz$P
* @since 2006-2-2 (64yg
* @version 1.0 r7',3V
*/ p ]d]QMu
public class ImprovedMergeSort implements SortUtil.Sort { <ZB1Vi9}8
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private static final int THRESHOLD = 10; }*L(;r)q
<qGu7y"
/* Q~T$N
* (non-Javadoc) {P*m;a`}
* YQY%M>F@d%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3$X'Y]5a
*/ HbW0wuI
public void sort(int[] data) { '}$Dgp6e
int[] temp=new int[data.length]; N$[{8yil^w
mergeSort(data,temp,0,data.length-1); 8(* [Fe9
} F8apH{&t
y '!m4-
private void mergeSort(int[] data, int[] temp, int l, int r) { .?l\g-;=
int i, j, k; :>=\.\
int mid = (l + r) / 2; sM9+dh
if (l == r) ^`G}gWBx}w
return; f;b[w
if ((mid - l) >= THRESHOLD) ,N0#!<}4
mergeSort(data, temp, l, mid); /i77
else tPF.r
insertSort(data, l, mid - l + 1); g1(IR)U!z
if ((r - mid) > THRESHOLD) /E\%>wv
mergeSort(data, temp, mid + 1, r); [KxF'mz9
else rEF0oJ.
insertSort(data, mid + 1, r - mid); 7a~X:#
SCz318n
for (i = l; i <= mid; i++) { KRA/MQ^7~U
temp = data; _F`lq_C
} `*shF9.\C
for (j = 1; j <= r - mid; j++) { ' MxrQ;|S
temp[r - j + 1] = data[j + mid]; /gG"v5]
} F|!){=
int a = temp[l]; ^(FdXGs[
int b = temp[r]; L+i(TM=
for (i = l, j = r, k = l; k <= r; k++) { r3PT1'P?L
if (a < b) { gN"7be&J
data[k] = temp[i++]; o !U 6?
a = temp; yYfsy?3
} else { Ct>GYk$
data[k] = temp[j--]; .;N1N^
b = temp[j]; (UxW;
} _FWBUZ;N
} <Sr
} [)TRTxFb
.Fp4: e
/** q?8| [.
* @param data \7'+h5a
* @param l 0ik7v<:
* @param i 9_5ow
*/ |/)${*a4n
private void insertSort(int[] data, int start, int len) { :n-]>Q>5=k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); s']Bx=
} q0zr E5
} gp\<p-}
} uu>Pkfo
} @8I4[TE
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堆排序： v p/yG
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package org.rut.util.algorithm.support; K>@+m
AnX%[W "
import org.rut.util.algorithm.SortUtil; e(<str>
[wzb<"kW
/** s|y "WDyx5
* @author treeroot ZG&>:Si;
* @since 2006-2-2 mmk=97
* @version 1.0 lp^<3o*1
*/ Ev}C<zk*
public class HeapSort implements SortUtil.Sort{ TJR:vr
fNW"+ <W
/* (non-Javadoc) (O(}p~s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]Yn_}Bq
*/ SR|`!
public void sort(int[] data) { @/ohg0
MaxHeap h=new MaxHeap(); P&^;656r
h.init(data); wLnf@&jQ%
for(int i=0;i h.remove(); yL-YzF2
System.arraycopy(h.queue,1,data,0,data.length); G\+L~t
} y#z
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private static class MaxHeap{ (bH`x]h#
VL` z[|e @
void init(int[] data){ ia+oX~W!VR
this.queue=new int[data.length+1]; HK0!P*
for(int i=0;i queue[++size]=data; YOmM=X+'H
fixUp(size); SSWP~ t
} :x4|X8>
} wMg0>
!`Hd-&}bYz
private int size=0; f@|A[>"V
J`].:IOh
private int[] queue; oUQ,61H
^Xq 6:
public int get() { cmU1!2.1E
return queue[1]; 1oWED*B
} heC/\@B
0?:} P
public void remove() { {ix?Brq/
SortUtil.swap(queue,1,size--); 9 %I?).5
fixDown(1); [QoK5Yw{
} GkTiDm?
file://fixdown CU@Rob}s
private void fixDown(int k) { ?FpWvyz|
int j; 67G?K;)e
while ((j = k << 1) <= size) { Zy?Hi`
if (j < size %26amp;%26amp; queue[j] j++; ?En O"T.
if (queue[k]>queue[j]) file://不用交换 :fZ}o|t7
break; QLiu2U o
SortUtil.swap(queue,j,k); 8y.wSu
k = j; gf &Pn
} b)qoh^
} Ch|jtVeuyJ
private void fixUp(int k) { i/`m`qdg
while (k > 1) { j2StXq3
int j = k >> 1; keX,d#
if (queue[j]>queue[k]) 2j}\3Pi
break; OuID%p"O
SortUtil.swap(queue,j,k); ogHCt{'
k = j; fPR1f~r
} `tA" }1;ka
} "8x8UgG
~5%W:qwQ
} xqG[~)~
*U,@q4
} \F/hMXDlJ
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SortUtil： %\dz m-d(C
d"*uBVzXm
package org.rut.util.algorithm; }Mp:JPH&S4
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import org.rut.util.algorithm.support.BubbleSort; q1"$<# t
import org.rut.util.algorithm.support.HeapSort; F@'Jbd`
import org.rut.util.algorithm.support.ImprovedMergeSort; BW}U%B^.
import org.rut.util.algorithm.support.ImprovedQuickSort; qG?Qc (
import org.rut.util.algorithm.support.InsertSort; !Sh&3uy_qN
import org.rut.util.algorithm.support.MergeSort; >,$_| C
import org.rut.util.algorithm.support.QuickSort; z"-u95H
import org.rut.util.algorithm.support.SelectionSort; * KDI}B>
import org.rut.util.algorithm.support.ShellSort; r%yvOF\>
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/** CYs,`
* @author treeroot fzb29 -
* @since 2006-2-2 jET{Le8i
* @version 1.0 [65`$x-
*/ ~962i#&4
public class SortUtil { ao1(]64X"
public final static int INSERT = 1; 8*#R]9
public final static int BUBBLE = 2; "55skmD.P
public final static int SELECTION = 3; RI 5yF
public final static int SHELL = 4; k;AD`7(=
public final static int QUICK = 5; Sq/ qu-%X
public final static int IMPROVED_QUICK = 6; =jOv] /
public final static int MERGE = 7; `.~N4+SP
public final static int IMPROVED_MERGE = 8; Rg\z<wPBG
public final static int HEAP = 9; fk6%XO
A+ZK4]xb
public static void sort(int[] data) { )wam8k5
sort(data, IMPROVED_QUICK); &:9cAIe]H
} =.f-w0V
private static String[] name={ ;c-(ObSm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #~}nFY.
}; Wuc S:8#|
ZM!CaR
private static Sort[] impl=new Sort[]{ 9kN}c<o
new InsertSort(), X0bN3N
new BubbleSort(), LtWP0@JA
new SelectionSort(), S;3R S;
new ShellSort(), /YP{,#p
new QuickSort(), sJ;g$TB
new ImprovedQuickSort(), -3t7*
new MergeSort(), \qdHX
new ImprovedMergeSort(), s C%&cRQD
new HeapSort() 42_`+Vt]d7
}; Neq+16*u
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public static String toString(int algorithm){ OE_XCZ!5P
return name[algorithm-1]; [')m|u~FS4
} `5cKA;j>b
&S{RGXj_
public static void sort(int[] data, int algorithm) { xu/cq9
impl[algorithm-1].sort(data); 1an^1!
} T! Y@`Ox
+%zAQeb
public static interface Sort { BZ94NOOdw
public void sort(int[] data); fxgPhnaC>
} lGPUIoUo
GY6`JWk
public static void swap(int[] data, int i, int j) { FcR=v0),
int temp = data; T6O::o6
data = data[j]; AF;)#T<
data[j] = temp; rn/ /%
} hm84Aq= f
} tX9{hC^