[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; Eg-b5Z);
} #Opfc8pm'
int i1=l; FPMhHHM
int i2=mid+1; 4,s: G.g
for(int cur=l;cur<=r;cur++){ 'cw0FpQ;
if(i1==mid+1) 2WE
data[cur]=temp[i2++]; I6y&6g
else if(i2>r) RO wbzA)]r
data[cur]=temp[i1++]; "XC6 l4Z
else if(temp[i1] data[cur]=temp[i1++]; rxa"ji!)
else h#]}J}si
data[cur]=temp[i2++]; <mY`<(bc
} {,APZ`q|
} c#"\&~. P
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} w,3`Xq@
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改进后的归并排序: ZFW}Vnl
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package org.rut.util.algorithm.support; dN |w;|M
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import org.rut.util.algorithm.SortUtil; J@Zm8r<
).oqlA!
/** XN=<s;U
* @author treeroot 5\=9&{WjND
* @since 2006-2-2 ts?b[v
* @version 1.0 &p;};n
*/ 6^{ hY^Z
public class ImprovedMergeSort implements SortUtil.Sort { :jp?FF^j;
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private static final int THRESHOLD = 10; '12|:t&7
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/* QV .A.DK
* (non-Javadoc) &@+K%qW[e
* gP(-Op
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @/$mZ]|T
*/ F|P2\SPL
public void sort(int[] data) { 1v2wP2]|;
int[] temp=new int[data.length]; sgX}`JH?z
mergeSort(data,temp,0,data.length-1); w,}}mC)\*
} n"FOCcTIs
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private void mergeSort(int[] data, int[] temp, int l, int r) { ljt1:@SN(
int i, j, k; 3:Z(tM&-O
int mid = (l + r) / 2; m]"YR_
if (l == r) C4 Wdt
return; 3Vw%[+lY9
if ((mid - l) >= THRESHOLD) J1R%w{
mergeSort(data, temp, l, mid); &-b=gnT
else -|)[s[T~m
insertSort(data, l, mid - l + 1); oQyG
if ((r - mid) > THRESHOLD) .k*2T<p$rC
mergeSort(data, temp, mid + 1, r); )D[xY0Y~
else }7.q[ ^oF
insertSort(data, mid + 1, r - mid); EL}v>sC
Tl%4L% bE
for (i = l; i <= mid; i++) { LWQ BGiJj
temp = data; --^D)n
} rXm!3E6JL
for (j = 1; j <= r - mid; j++) { A\#?rK
temp[r - j + 1] = data[j + mid]; <BU|?T6~
} 'h= >ej*
int a = temp[l]; *e>:K$r
int b = temp[r]; e0$mu?wd-
for (i = l, j = r, k = l; k <= r; k++) { bR8)s{p6
if (a < b) { SD.ze(P
data[k] = temp[i++]; OT *W]f
a = temp; GzB%vsv95
} else { "V^jAPDXb
data[k] = temp[j--]; %[Ds-my2
b = temp[j]; I^ >zr.zA
} -+PPz?0
} c''O+,L1+
} rSJ}qRXwU
=VY4y]V
/** {VNeh
* @param data ,3n}*"K
* @param l #TSM#Uqe
* @param i ncA2en?
*/ hT]p8m aRZ
private void insertSort(int[] data, int start, int len) { {(q Un
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Bhs`Y/Ls-
} )?xt=9Lh
} HkV/+ {;S~
} CTP%
} cq=R
}>1E,3A:%G
堆排序： eS.]@E-T
A"k,T7B
package org.rut.util.algorithm.support; 0Gs]>B4r/
b gDDys
import org.rut.util.algorithm.SortUtil; 3AL.UBj&}
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/** Y$Ke{6 4
* @author treeroot /vV 0$vg
* @since 2006-2-2 .Lp-'!i
* @version 1.0 d{trO;%#f
*/ LtU+w*Gj
public class HeapSort implements SortUtil.Sort{ wS^-o
v6n(<0:
/* (non-Javadoc) T*ic?!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c"$_V[m
*/ n$?oZ*;
public void sort(int[] data) { }rQ*!2Y?
MaxHeap h=new MaxHeap(); G`P+J
h.init(data); ;8v5 qz
for(int i=0;i h.remove(); >mV""?r]
System.arraycopy(h.queue,1,data,0,data.length); SeTU`WLEm
} y5ExEXa
<?g{Rn
private static class MaxHeap{ (j/O=$mJ
p4Y9$(X
void init(int[] data){ ,-"]IR!,w
this.queue=new int[data.length+1]; }*t~&l0
for(int i=0;i queue[++size]=data; cs5Xd
fixUp(size); p~b$+8#+
} w '"7~uN
} 3OZ}&[3
1_QO>T'
private int size=0; :h3JDQe:.
xVe!
private int[] queue; CP'-CQ\Q
7.t$#fzi
public int get() { wf4Q}l2,d
return queue[1]; F)IP~BE-k
} =3:ltI.'*I
~;W%s
public void remove() { W{h7+X]Y
SortUtil.swap(queue,1,size--); %Fv)$ :b
fixDown(1); vKC>t95
} 4kM<L}J#
file://fixdown )'g vaT
private void fixDown(int k) { >xjy P!bca
int j; <b\urtoJ
while ((j = k << 1) <= size) { MI}D%n*
if (j < size %26amp;%26amp; queue[j] j++; z)B=<4r
if (queue[k]>queue[j]) file://不用交换 >gE_?%a[
break; R[c_L=
SortUtil.swap(queue,j,k); ;gyE5n-{
k = j; 34=0.{qn
} .<B1i
} hTm}j,H
private void fixUp(int k) { I}WJ0}R
while (k > 1) { ;'p'8lts
int j = k >> 1; h]#)41y<
if (queue[j]>queue[k]) * y B-N;I
break; K0\WN"ua;
SortUtil.swap(queue,j,k); &g!/@*[Nhh
k = j; (G VGoh&
} )3AT=b
} Z7^}G=*
#O WSy'Qnt
} \abl|;fj
S(6ZX>wv:
} "ir*;|
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SortUtil： "Tv7*3>
~-+Zu<
package org.rut.util.algorithm; -eMRxa>
qAS^5|(b[
import org.rut.util.algorithm.support.BubbleSort; =+p+_}C
import org.rut.util.algorithm.support.HeapSort; @2gMtf?<
import org.rut.util.algorithm.support.ImprovedMergeSort; '}u31V"SS
import org.rut.util.algorithm.support.ImprovedQuickSort; Pa}vmn1$
import org.rut.util.algorithm.support.InsertSort; F?=u:
import org.rut.util.algorithm.support.MergeSort; Eg*3**gTO
import org.rut.util.algorithm.support.QuickSort; Z-@}~#E
import org.rut.util.algorithm.support.SelectionSort; !UTJ) &
import org.rut.util.algorithm.support.ShellSort; MQ44uHJ
5qy}~dQ
/** 3o>t~Sfi
* @author treeroot ^|C|=q~:
* @since 2006-2-2 ja/[PHq"
* @version 1.0 ?=kswf
*/ *-_Npu6
public class SortUtil { Qx;A; n!lw
public final static int INSERT = 1; 7o. 'F
public final static int BUBBLE = 2; &iZYBa
public final static int SELECTION = 3; kdCOcJB
public final static int SHELL = 4; s/M~RB!w
public final static int QUICK = 5; J~q+G
public final static int IMPROVED_QUICK = 6; dI-5%Um
public final static int MERGE = 7; ydQS"]\g
public final static int IMPROVED_MERGE = 8; 16|S 0 )
public final static int HEAP = 9; __j8jEV
nY)Pxahm7
public static void sort(int[] data) { `Tj}4f
sort(data, IMPROVED_QUICK); 3;NRW+
} 7VcVI? ?
private static String[] name={ n^N]iw{G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1!3kAcBP
}; +`8)U3u0
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private static Sort[] impl=new Sort[]{ wVDB?gy%#
new InsertSort(), : qRT9n$
new BubbleSort(), P~e$iBH'
new SelectionSort(), dU6LB+A
new ShellSort(), I0K!Kcu5Iu
new QuickSort(), de9l;zF
new ImprovedQuickSort(), x[UO1% _o-
new MergeSort(), I})t
new ImprovedMergeSort(), K/`RZ!
new HeapSort() GDp p`'\
}; Cg pT(E\E
OPW"ABJ
public static String toString(int algorithm){ PU5mz.&0'
return name[algorithm-1]; C+XZDY(=Z
} acQNpT
; ,jLtl
public static void sort(int[] data, int algorithm) { ~qxXou,J
impl[algorithm-1].sort(data); Y&+_p$13
} mthl?,I|
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public static interface Sort { J"/z?!)IB
public void sort(int[] data); PMs_K"-K
} j#t8Krd] "
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public static void swap(int[] data, int i, int j) { x}'4^Cv
int temp = data; :xS&Y\ry
data = data[j]; 4UjE*Aq
data[j] = temp; g)qnjeSs]
} ^85n9a?8
} 8zDH<Gb