[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; 2W pe( $
} 9$NFZ3Mz
int i1=l; 8O{]ML
int i2=mid+1; Kw'Dzz%kN
for(int cur=l;cur<=r;cur++){ "!)8bTW
if(i1==mid+1) ,|I\{J #C
data[cur]=temp[i2++]; \Y9=dE}
else if(i2>r) X_ >B7(k
data[cur]=temp[i1++]; ^OG^% x"
else if(temp[i1] data[cur]=temp[i1++]; @n(=#Q3
else mUy/lo'4
data[cur]=temp[i2++]; Ao96[2U6
} f.jAJ; N>
} 6o;lTOes
]CC= \<
} ;_j\E(^%
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改进后的归并排序: w& RpQcV
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package org.rut.util.algorithm.support; (I.uQP~H
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import org.rut.util.algorithm.SortUtil; w]yLdfi!
!xo@i XL
/** \)BKuIP
* @author treeroot @=wAk5[IN
* @since 2006-2-2 54F([w
* @version 1.0 8zj09T[
*/ l^`!:BOtR
public class ImprovedMergeSort implements SortUtil.Sort { k9 *0xukJ
|r-<t
private static final int THRESHOLD = 10; =X&h5;x'
V2/+SvB2
/* 6lT'%ho}B
* (non-Javadoc) FA{I S0
* uy\YJ.WMQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x6DH0*[.
*/ =hl-c
public void sort(int[] data) { $Z28nPd/
int[] temp=new int[data.length]; }Tc)M_
mergeSort(data,temp,0,data.length-1); `"ie57-
} A94VSUDA:
.h+<m7
private void mergeSort(int[] data, int[] temp, int l, int r) { [JAd1%$3
int i, j, k; xC;$/u%'
int mid = (l + r) / 2; n;rOH[P
if (l == r) F$ h/k^
return; McsqMI6
if ((mid - l) >= THRESHOLD) * n!0
mergeSort(data, temp, l, mid); O1#rCFC|y
else hChM hc
insertSort(data, l, mid - l + 1); ; wHuL\
if ((r - mid) > THRESHOLD) WZ&#O#(eO`
mergeSort(data, temp, mid + 1, r); [/#n+sz.A
else %7|qnh6
insertSort(data, mid + 1, r - mid); 3b&W=1J
c7rYG]
for (i = l; i <= mid; i++) { D 0n2r
temp = data; &tRnI$D
} 3F.O0Vz
for (j = 1; j <= r - mid; j++) { Gj)Qw6
temp[r - j + 1] = data[j + mid]; d'3'{C|kk
} :&:>sd(QD
int a = temp[l]; Rkm7"dO0
int b = temp[r]; A`N;vq,
for (i = l, j = r, k = l; k <= r; k++) { _^'k_a
if (a < b) { =kc{Q@Dk
data[k] = temp[i++]; Cza)s
a = temp; '6WDs]\
} else { mmjB1L
data[k] = temp[j--]; 9MYt4
b = temp[j]; dJ&s/Z/>E
} >y8Z{ALQ5
} 3o^V$N.
} 57MoO
\U-5&,fP
/** 7I44BC*R~
* @param data E Fv+[
* @param l $\K(EBi#G
* @param i /gdo~
*/ & {/u>,
private void insertSort(int[] data, int start, int len) { fzio8mKVX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); +_}2zc4
} B+Bv(p
} RI*%\~6t?
} L"-&B$B:
} ./g#<
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堆排序： '{u#:TTj
kg@J.
package org.rut.util.algorithm.support; O71rLk;
T6,lk1S'=
import org.rut.util.algorithm.SortUtil; 0ND7F
S8cFD):q
/** ixH7oWH#
* @author treeroot 'Hia6<m3
* @since 2006-2-2 a$|u!_)!h
* @version 1.0 :OZhEBL&b
*/ U{}7:&As
public class HeapSort implements SortUtil.Sort{ Z"^@B2v
enrmjA&3
/* (non-Javadoc) E<4}mSn)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .KLuGb3JJ
*/ lKwcT!Q4
public void sort(int[] data) { W P&zF$
MaxHeap h=new MaxHeap(); "|%fAE
h.init(data); E4.IS=4S
for(int i=0;i h.remove(); [eN{Ft0x
System.arraycopy(h.queue,1,data,0,data.length); ,5?MRqCM
} W!^=)Qs
#e=^[E-yE
private static class MaxHeap{ !58JK f
~S6N'$^
void init(int[] data){ CYu8J@(\~g
this.queue=new int[data.length+1]; eC39C2q\
for(int i=0;i queue[++size]=data; =+L>^w#6=
fixUp(size); R{B~Now3
} U,S286
} |Wgab5D>V
?C{N0?[P-
private int size=0; ZM.g+-9
# 0(\s@r.
private int[] queue; }>:X|4]
TK>}$.c%+
public int get() { 2fk
return queue[1]; T{M:)}V
} F&~vD
Ye6O!,R
public void remove() { *~L]n4-
SortUtil.swap(queue,1,size--); t*#&y:RG
fixDown(1); X9j+$X\j
} =R"tnjR
file://fixdown N-|Jj?c
private void fixDown(int k) { bW|y -GM
int j; m t^1[
while ((j = k << 1) <= size) { QMY4%uyY!
if (j < size %26amp;%26amp; queue[j] j++; 1hWz%c|
if (queue[k]>queue[j]) file://不用交换 u\wd<<I']
break; iE`aGoA
SortUtil.swap(queue,j,k); l:"*]m7o_
k = j; 7KIQ)E'kG|
} :[39g;V}c
} ZB%~>
private void fixUp(int k) { T1&H!
while (k > 1) { :JIPF=]fc
int j = k >> 1; t} M3F-NZ
if (queue[j]>queue[k]) J|IDnCK
break; do,X{\
SortUtil.swap(queue,j,k); LfApVUm
k = j; S@)bl
} XEEbmIO*<9
} <hbbFL}|%
U8KY/!XZ
} buXG32;
F! e`i-xt
} TbVL71c
^'4uTbxP_!
SortUtil： m~eWQ_a]C@
bl<7[J.
package org.rut.util.algorithm; z;fSd
. 6dT5x8u
import org.rut.util.algorithm.support.BubbleSort; lz 6 Aj
import org.rut.util.algorithm.support.HeapSort; ^aCYh[=
import org.rut.util.algorithm.support.ImprovedMergeSort; nL!@#{z
import org.rut.util.algorithm.support.ImprovedQuickSort; B vc=gW
import org.rut.util.algorithm.support.InsertSort; %5gJ6>@6Z
import org.rut.util.algorithm.support.MergeSort; -pu\p-Z
import org.rut.util.algorithm.support.QuickSort; tW>R 16zq
import org.rut.util.algorithm.support.SelectionSort; 2A|6o*s"
import org.rut.util.algorithm.support.ShellSort; 9(WC#-,
KOx#LGz
/** 9Q/!%y%5
* @author treeroot .*blM1+6i/
* @since 2006-2-2 1_C6KS
* @version 1.0 ]:s|.C%qI
*/ [#Vr)\n
public class SortUtil { pQ{t< >
public final static int INSERT = 1; w"iZn
public final static int BUBBLE = 2; I+t38un%
public final static int SELECTION = 3; T}[vfIJD
public final static int SHELL = 4; C>dJ:.K%H
public final static int QUICK = 5; E5{)d~q
public final static int IMPROVED_QUICK = 6; Dt.Wb&V_w
public final static int MERGE = 7; /nFw
public final static int IMPROVED_MERGE = 8; X)OP316yx
public final static int HEAP = 9; Qu_T&
hp4(f W
public static void sort(int[] data) { o7XRa]O
sort(data, IMPROVED_QUICK); #UD
} DG?\6Zh
private static String[] name={ TWEqv<c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;@ X
}; Ue:T3jp3%
q"<-
private static Sort[] impl=new Sort[]{ qXGLv4c`Q
new InsertSort(), )\Q|}JV
new BubbleSort(), H>iZVE
new SelectionSort(), nV*sdSt
new ShellSort(), iQC&d_#
new QuickSort(), *8H;KGe=
new ImprovedQuickSort(), ix@rq#
new MergeSort(), RgA4@J#
new ImprovedMergeSort(), 7`@?3?
new HeapSort() 0\nhg5]?
}; F$p*G][
z.HNb$;
public static String toString(int algorithm){ _ D}b
return name[algorithm-1]; RpP[ymMZJ
} k.[) R@0%
Bjj^!T/#
public static void sort(int[] data, int algorithm) { vXQmEIm
impl[algorithm-1].sort(data); <# r.}T.l
} f+Li'?
0]W]#X4A
public static interface Sort { +STzG/9#
public void sort(int[] data); 72vGfT2HtZ
} =e-aZ0P
,ri--<
public static void swap(int[] data, int i, int j) { -L?% o_
int temp = data; 8z8SwWS?
data = data[j]; .OS?^\
data[j] = temp; )}\@BtcjA]
} /~cL L
} VhIIW"1