[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; Y&_&s7z
} NqEA4C
int i1=l; }_;!hdYq
int i2=mid+1; g'=B%eO$j:
for(int cur=l;cur<=r;cur++){ xY U.D+RY
if(i1==mid+1) 2fS[J'-o
data[cur]=temp[i2++]; {]_r W/
else if(i2>r) N:tY":Hi
data[cur]=temp[i1++]; 7.@TK&
else if(temp[i1] data[cur]=temp[i1++]; %]6~Eq%s
else YoLx>8
data[cur]=temp[i2++]; D3^7y.u<)
} K+8-9$w6
} Q7C;1aO
&jczO-R^
} 13%t"-@bh
^;maotHn
改进后的归并排序: {g~bQ2wDC
d/|D<Sb[s
package org.rut.util.algorithm.support; :ORR_f`>
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import org.rut.util.algorithm.SortUtil; GbA.UM~
bi&*9K0
/** I}t3 p|z
* @author treeroot 3a 1u
* @since 2006-2-2 Cc<,z*T
* @version 1.0 .OqSch|
*/ Qb; d:@9
public class ImprovedMergeSort implements SortUtil.Sort { J}@z_^|"mJ
L%$|^T=%
private static final int THRESHOLD = 10; E+tB&
UH>F|3"d
/* a/U2xq{x
* (non-Javadoc) u4neXYSy
* P<2+L|X?}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |vMpXiMxxT
*/ LIVU^Os.
public void sort(int[] data) { wwoweztER
int[] temp=new int[data.length]; ,i6RE
mergeSort(data,temp,0,data.length-1); 8kOKwEX
} N0w`!<y:c
o|iYd n\
private void mergeSort(int[] data, int[] temp, int l, int r) { TO*BH^5R
int i, j, k; qdG~!h7j
int mid = (l + r) / 2; h:)Ci!D;
if (l == r) 7GSV
return; G #T<`>T
if ((mid - l) >= THRESHOLD) o/ mF#
mergeSort(data, temp, l, mid); I3:[= ,5
else uV hCxUMQ
insertSort(data, l, mid - l + 1); d:q +
if ((r - mid) > THRESHOLD) 5P+t^\
mergeSort(data, temp, mid + 1, r); @@g\2Gs
else Z,;cCxE
insertSort(data, mid + 1, r - mid); ror|R@;y
{(#%N5%
for (i = l; i <= mid; i++) { s(LT
temp = data; m8JR@!t7
} a=$t&7;,
for (j = 1; j <= r - mid; j++) { C"qU-&*v
temp[r - j + 1] = data[j + mid]; H:JLAK
} 8dOo Q
int a = temp[l]; 8; R|
int b = temp[r]; tYqs~B3
for (i = l, j = r, k = l; k <= r; k++) { I.@hW>k
if (a < b) { qr50E[
data[k] = temp[i++]; 1b>C<\
a = temp; q7m6&2$[
} else { vF/ =J
data[k] = temp[j--]; ]PP:oriWl
b = temp[j]; NLe}Jqp
} %=<IGce
} >x@P|\
} HXVBb%pP
Q U F$@)A
/** 5Wj; [2 )
* @param data %T=A{<[`
* @param l uw7{>9
* @param i !lmWb-v%36
*/ qxJQPz
private void insertSort(int[] data, int start, int len) { :9Y$'+ <&H
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $7Mtt.d6
} HFQR ;9]
} nCvPB/-
} QIn/,Yd
} l0Ti Z
a!c[!
堆排序： Hj1 EGCA
7ji=E";.w
package org.rut.util.algorithm.support; jSQ9.%4
"?GebA
import org.rut.util.algorithm.SortUtil; ~ZlC '
'7B"(dA&C
/** k)FmDX
* @author treeroot !sA_?2$
* @since 2006-2-2 jN+N(pIi.o
* @version 1.0 68'>Zbelb
*/ 7C?.L70ZY
public class HeapSort implements SortUtil.Sort{ HT_TP q
2o[IHO]
/* (non-Javadoc) ftavbNR`W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ? {F{;r
*/ dYojm1MQ
public void sort(int[] data) { baoD(0d
MaxHeap h=new MaxHeap(); l t]B#, '
h.init(data); F X1ZG!
for(int i=0;i h.remove(); k6?cP0I)5
System.arraycopy(h.queue,1,data,0,data.length); qturd7
} dj[apuiF
"n\%_'R\hH
private static class MaxHeap{ W*xX{$NL
)yb+M ez
void init(int[] data){ SHqyvF
this.queue=new int[data.length+1]; ;ggy5?>Qu
for(int i=0;i queue[++size]=data; gKb0)4 AK
fixUp(size); 8xI`jE"1
} W)SjQp6
} g42R 'E%
r<L#q)]
private int size=0; {lzG*4?
L$Z(+6m5
private int[] queue; qMS}t3X
qG>DTKIU
public int get() { _8h8Wtif
return queue[1]; X`\:_|
} NyI;v=
c! H 9yk
public void remove() { T"E( F
SortUtil.swap(queue,1,size--); ke.7Zp2.R
fixDown(1); Ew^ @Aq
} ?9u4a_x
file://fixdown N^elVu4 K
private void fixDown(int k) { ^4`&EF
int j; ,R-Y~+!
while ((j = k << 1) <= size) { Q)Dwq?
if (j < size %26amp;%26amp; queue[j] j++; n*qN29sx
if (queue[k]>queue[j]) file://不用交换 RyRqH:p)3
break; }w!ps{*
SortUtil.swap(queue,j,k); <qiICb)~
k = j; _Nu`)m
} {=At#*=A
} O5 7jz= r
private void fixUp(int k) { K ar~I
while (k > 1) { Wm6dQQ;Bj
int j = k >> 1; A:Rw@B$
if (queue[j]>queue[k]) ~Y/z=^
break; ,p,Du F
SortUtil.swap(queue,j,k); dB|Te"6
k = j; u2`xC4>c
} +|nsu4t,<
} }?O[N}>,m
hBCR]=']
} D$_8rHc\A
&R\XUxI
} "zZ&n3=@
JY4_v>Aob
SortUtil： rqvU8T7A
6dT|;koWbm
package org.rut.util.algorithm; ?\yB)Nd y
O=O(3Pf>
import org.rut.util.algorithm.support.BubbleSort; eECj_eH-
import org.rut.util.algorithm.support.HeapSort; *t=i
import org.rut.util.algorithm.support.ImprovedMergeSort; tvWH04T
import org.rut.util.algorithm.support.ImprovedQuickSort; fJ :jk6@
import org.rut.util.algorithm.support.InsertSort; |z7dRDU}]
import org.rut.util.algorithm.support.MergeSort; X"J%R/f
import org.rut.util.algorithm.support.QuickSort; _XN~@5elrC
import org.rut.util.algorithm.support.SelectionSort; F|]rA*2u
import org.rut.util.algorithm.support.ShellSort; E2yz=7sv5
[n<.fw8$b
/** t+}uIp42<
* @author treeroot px&=((Z7>
* @since 2006-2-2 H*qD: N
* @version 1.0 ip5u_Xj?
*/ 0e9A+&r
public class SortUtil { A1!:BC
public final static int INSERT = 1; #6FaIq92V
public final static int BUBBLE = 2; ],V kp
public final static int SELECTION = 3; 59qnEIi
public final static int SHELL = 4; 7jZrU|:yu(
public final static int QUICK = 5; vadM1c*z
public final static int IMPROVED_QUICK = 6; |\p5mh
public final static int MERGE = 7; 7dhn'TW
public final static int IMPROVED_MERGE = 8; F9D"kG;Dk
public final static int HEAP = 9; xhD$e= g
w})NmaT;YF
public static void sort(int[] data) { 5fxbA2\
sort(data, IMPROVED_QUICK); y84XoDQ
} & ^!v*=z
private static String[] name={ G+Ei#:W,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xfUhSt
}; <d<RK@2-
InX{V|CW?
private static Sort[] impl=new Sort[]{ o;'4c
new InsertSort(), Pu/lpHm|
new BubbleSort(), s_` V*`n&
new SelectionSort(), ^*zW"s
new ShellSort(), 7#/|VQX<A
new QuickSort(), <lX:eR1
new ImprovedQuickSort(), ][N) 2_^M
new MergeSort(), 9e76pP(
new ImprovedMergeSort(), .hnF]_QQ
new HeapSort() 9w$7VW;
}; Ty iU1,oO
^"/Dih\_
public static String toString(int algorithm){ 6g5]=Q@U:
return name[algorithm-1]; <e^6.!;W
} \Em-.%c
DwC@"i.
public static void sort(int[] data, int algorithm) { z+2u-jG
impl[algorithm-1].sort(data); a#6,#Q"
} ;C6O3@Q
t)`+d=P
public static interface Sort { =z']s4
public void sort(int[] data); 7vdHR\#;$
} _/8y1)I
Dl@{}9
public static void swap(int[] data, int i, int j) { iPJ9Gh7
int temp = data; ^$?7H>=_ha
data = data[j]; )m>6hk
data[j] = temp; 2w;G4
} gtl;P_
} f>b!-|