[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; "L>'X22ed
} Vgm*5a6t
int i1=l; #`Su3~T=S
int i2=mid+1; '#Wx@
for(int cur=l;cur<=r;cur++){ /^=1]+_!
if(i1==mid+1) c>bns/f
data[cur]=temp[i2++]; :82T!
else if(i2>r) lZk z\
data[cur]=temp[i1++]; CE"/&I
else if(temp[i1] data[cur]=temp[i1++]; .s{"NqRA
else D||0c"E
data[cur]=temp[i2++]; LOUP
} BlJiHz!
} oidZWy
Jm_)}dj3o
} '_v~+
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改进后的归并排序: qda 2
ebA:Sq:w
package org.rut.util.algorithm.support; t<rIg1
# ~<]z
import org.rut.util.algorithm.SortUtil; :qm\FsO
\[9VeqMU
/** N[Z`tk?-
* @author treeroot sH6;__e
* @since 2006-2-2 (.-4Jn
* @version 1.0 -XYvjW,|
*/ D07M!U
public class ImprovedMergeSort implements SortUtil.Sort { hQ#e;1uD
l>6tEOXt
private static final int THRESHOLD = 10; $>)0t@[f
7. F'1oEf
/* [CQR
* (non-Javadoc) /A9RmTb
* v,")XPY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qzW3MlD
*/ Yjoe|
public void sort(int[] data) { <rzP
int[] temp=new int[data.length]; NK|UeL7ght
mergeSort(data,temp,0,data.length-1); B&cIx~+
} W9SU1{*9
*PF<J/Pr
private void mergeSort(int[] data, int[] temp, int l, int r) { NQ{(G8x9
int i, j, k; P%|~Ni_BTX
int mid = (l + r) / 2; sK2N3B&6
if (l == r) #/>TuJc
return; `7/(sX.
if ((mid - l) >= THRESHOLD) ;UQza ]i
mergeSort(data, temp, l, mid); &ijz'Sg3
else SAP/jD$5]>
insertSort(data, l, mid - l + 1); w/|&N>ZOx
if ((r - mid) > THRESHOLD) @R&d<^I&M
mergeSort(data, temp, mid + 1, r); |62` {+
else wn"}<ka
insertSort(data, mid + 1, r - mid); 5/"$_7"{a
P%2v(
for (i = l; i <= mid; i++) { E+]}KX:
temp = data; zud_BOq{f
} Im;%.J
for (j = 1; j <= r - mid; j++) { ;e?M;-
temp[r - j + 1] = data[j + mid]; ?[JP[ qS
} J*;RL`
int a = temp[l]; 8?Zhh.
int b = temp[r]; ]PS`"o,pF$
for (i = l, j = r, k = l; k <= r; k++) { 9@|52dz%
if (a < b) { 5%jhVys23
data[k] = temp[i++]; <YyE1|
a = temp; (%6fMVp
} else { |nNcV~%~
data[k] = temp[j--]; hTDK[4e
b = temp[j]; Qu|CXUk
} =F+v+zP7P
} /h>g-zb
} z:\9t[e4
p@jw)xI
/** i.mv`u Dm
* @param data re*}a)iL
* @param l =Dn<DV
* @param i !Se0&Ob
*/ %#2$B+
private void insertSort(int[] data, int start, int len) { yCxYFi
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D0Q9A]bD;
} JLu$1A@ '
} rqjq}L)
} ~P|;Y<?3
} ?~o`mg
5m1J&TZ0
堆排序： OHndZ$'fI
s!IIvF
package org.rut.util.algorithm.support; 3-/|G-4k7
^L%_kL_7
import org.rut.util.algorithm.SortUtil; AYn65Ly
-`faXFW'
/** 3m>YR-n$
* @author treeroot 1Dr&BXvf]8
* @since 2006-2-2 h ;*x1BVE
* @version 1.0 >eTbg"\
*/ iwF_'I$#N
public class HeapSort implements SortUtil.Sort{ 2F2Hl
:-RB< Lj
/* (non-Javadoc) FOF@@C~aH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mG1~rI
*/ <&\ng^Z$
public void sort(int[] data) { ^+yz}YFM
MaxHeap h=new MaxHeap(); CzBYH
h.init(data); "W(D0oy
for(int i=0;i h.remove(); Y:DopKRD
System.arraycopy(h.queue,1,data,0,data.length); )Q=u[ p
} b<tV>d"Fv
72;'8
private static class MaxHeap{ -_ 9k+AV
`jeATxWv
void init(int[] data){ :Q`Of}#
this.queue=new int[data.length+1]; /#00'(oD
for(int i=0;i queue[++size]=data; aBC5?V*e%
fixUp(size); QATRrIj{e
} Bc8&-eZ,
} J.UNw8z
"1,*6(;:
private int size=0; ]he~KO[j<
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private int[] queue; nL?P/ \
Gi)Vr\Q.
public int get() { "lt<$.
return queue[1]; |"}rdOV)
} iDDJJ>F26
@V 'HX
public void remove() { lc <V_8
SortUtil.swap(queue,1,size--); :of([e|u6
fixDown(1); @1oX&#
} [l-o*@
file://fixdown N[cIr{XBGN
private void fixDown(int k) { +mrLMbBiD
int j; J|I*n
while ((j = k << 1) <= size) { neU=1socJ
if (j < size %26amp;%26amp; queue[j] j++; p<r^{y
if (queue[k]>queue[j]) file://不用交换 ^t3>Z|DiB^
break; k@7#8(3
SortUtil.swap(queue,j,k); w>B}w
k = j; 2q[pOT'k
} ;y(;7n_ a
} IT NFmD
private void fixUp(int k) { x{;{fMN1
while (k > 1) { 'ayb`
int j = k >> 1; _|\X8o_
if (queue[j]>queue[k]) ?q`i MiN
break; frcX'M}%
SortUtil.swap(queue,j,k); brTNwRze
k = j; ?pIELezfK
} }aOqoi7w
} y`j_]qvt
:Fhk$?/r
} a8TtItN
:? )!yI
} V<5. 4{[G
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SortUtil： 79 4UY
x=H{Rv
package org.rut.util.algorithm; 4AL,=C3
B!mHO*g
import org.rut.util.algorithm.support.BubbleSort; HsYzIQLL
import org.rut.util.algorithm.support.HeapSort; `]65&hWZL
import org.rut.util.algorithm.support.ImprovedMergeSort; K\ Wzh;
import org.rut.util.algorithm.support.ImprovedQuickSort; _ uOi:Ti
import org.rut.util.algorithm.support.InsertSort; A!GvfmzqIn
import org.rut.util.algorithm.support.MergeSort; W^09tx/I
import org.rut.util.algorithm.support.QuickSort; (LsVd2AbR
import org.rut.util.algorithm.support.SelectionSort; q5r7KYH{
import org.rut.util.algorithm.support.ShellSort; Yp(0XP5o
s YTJ^Kd
/** \j!/l f)
* @author treeroot n`^jNXE
* @since 2006-2-2 346 z`5
* @version 1.0 oC" [rn
*/ &FmTT8"l
public class SortUtil { ^nZ=B>Yn2
public final static int INSERT = 1; _f2rz+
public final static int BUBBLE = 2; l'm|**
public final static int SELECTION = 3; TAh'u|{u2
public final static int SHELL = 4; Z5'^Hj1,
public final static int QUICK = 5; xppnBnu$7
public final static int IMPROVED_QUICK = 6; ;S^"Y:7)
public final static int MERGE = 7; "3jTU
public final static int IMPROVED_MERGE = 8; Ngx2N<$<*g
public final static int HEAP = 9; qy?$t:*pp
E[t[R<v,P!
public static void sort(int[] data) { { (.@bT@
sort(data, IMPROVED_QUICK); &(<>} r
} <`-sS]=d}
private static String[] name={ o.Ww.F
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rZ,3:x-:
}; Uy=yA
>7@,,~3
private static Sort[] impl=new Sort[]{ )j'Qi^;(D
new InsertSort(), )}$rgYKJ
new BubbleSort(), Ruq;:5u
new SelectionSort(), 3KqRw (BK
new ShellSort(), !DA4q3-U>>
new QuickSort(), +D @B eQu
new ImprovedQuickSort(), -`ljKp
new MergeSort(), EyR/
new ImprovedMergeSort(), vg?(0Gasm*
new HeapSort() 6{d?3Jk
}; >4bw4 Z1
W`LG.`JW
public static String toString(int algorithm){ \="U|LzG
return name[algorithm-1]; :BR_%$
} O6e$vI@
J|jvqt9C
public static void sort(int[] data, int algorithm) { fiC0'4.,
impl[algorithm-1].sort(data); ?v,c)
} tMdSdJ8
^W}|1.uZ
public static interface Sort { uN?Lz1W\;
public void sort(int[] data); pno}`Cer
} Lm!]m\LRZD
C<C^7-5
public static void swap(int[] data, int i, int j) { vC&0UNe$
int temp = data; XU<owk
data = data[j]; 4D5Wse
data[j] = temp; yS K81`
} Tn,_0
} [A,!3BN