[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; 2i#Ekon
} 2f%+1uU
int i1=l; N.Q}.(N0
int i2=mid+1; vJi<PQ6
for(int cur=l;cur<=r;cur++){ 4noy!h
if(i1==mid+1) x\ #K2
data[cur]=temp[i2++]; y"7*u 3>"
else if(i2>r) 2{BS `f
data[cur]=temp[i1++]; Dpu?JF]
else if(temp[i1] data[cur]=temp[i1++]; C7W<7DBf
else z#`Qfvu6Hi
data[cur]=temp[i2++]; fD\Fq'29{
} Yc6.v8a
} sqV~Dw
x)eF{%QB
} 60ciI,_`
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改进后的归并排序: cVMRSp
UEx<;P8rP
package org.rut.util.algorithm.support; xj8z*fC;
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import org.rut.util.algorithm.SortUtil; `Xeiz'~f8
H0])>1sWB
/** jy>?+hm?
* @author treeroot ,UVu.RjXN
* @since 2006-2-2 aqK+ u.H
* @version 1.0 ]n"RPktx
*/ e9/Mjq\
public class ImprovedMergeSort implements SortUtil.Sort { O x`K7$)
B1U!*yzG6
private static final int THRESHOLD = 10; OR $i,N|
q=`n3+N_H~
/* u&TXN;I,p
* (non-Javadoc) v?,@e5GZ
* h*1T3U$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E>5p7=Or;"
*/ .$y'>O*$G
public void sort(int[] data) { eGpKoq7a
int[] temp=new int[data.length]; Y}2Sr-@u
mergeSort(data,temp,0,data.length-1); :qB|~"9O
} oqbz!dM(Z
E6O!e<ze^
private void mergeSort(int[] data, int[] temp, int l, int r) { @K*W3&TO
int i, j, k; ;&}z L.!jo
int mid = (l + r) / 2; Q}<QE:-&E
if (l == r) b$*2bSdv0<
return; ae@!M
if ((mid - l) >= THRESHOLD) |sFd5X
mergeSort(data, temp, l, mid); p"jze3mF
else T=sAy/1oR
insertSort(data, l, mid - l + 1); IDos4nM27]
if ((r - mid) > THRESHOLD) 4<E <sD
mergeSort(data, temp, mid + 1, r); Q_iN/F
else 7j=KiiI
insertSort(data, mid + 1, r - mid); * ]bB7
1t^9.!$@y
for (i = l; i <= mid; i++) { 8>x'. 8
temp = data; 5=#d#dDc
} %t!S 7UD
for (j = 1; j <= r - mid; j++) { Lr8|S
temp[r - j + 1] = data[j + mid]; QE)zH)(
} h.ftl2>
int a = temp[l]; eu_ZsseZ
int b = temp[r]; j} ^3v #
for (i = l, j = r, k = l; k <= r; k++) { h2Th)&Fb>
if (a < b) { $2i@@#g8
data[k] = temp[i++]; k_1@?&3
a = temp; #wRhR>6
} else { 5%fWX'mS
data[k] = temp[j--]; Qf~$9?z
b = temp[j]; n@;B_Bt7
} hqjjd-S0
} <?!'
} CX\XaM)l
Y0EX{oxt1
/** 0}`-vOLd-
* @param data "gm5DE
* @param l GtZ.'?-
* @param i 'OP0#`6`
*/ u "k< N|.3
private void insertSort(int[] data, int start, int len) { Qb/:E}h]$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `#`jU"T|
} _<sN54
} mR XRuK
} l*&N<Yu
} ?#Z4Dg 9|
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堆排序： u)o-H!a
Cfd* Q
package org.rut.util.algorithm.support; D^. c:
T7.SjR6X>
import org.rut.util.algorithm.SortUtil; s9nPxC&A
zixG}'
/** m26YAcip}
* @author treeroot ~v pIy-
* @since 2006-2-2 \'Et)uD*
* @version 1.0 3Xd:LDZ{
*/ T9Juq6|
public class HeapSort implements SortUtil.Sort{ <anKw|
h ka_Fo
/* (non-Javadoc) kln)7SzPuk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >&S}u\/
*/ u|Mx}
public void sort(int[] data) { J-dB
MaxHeap h=new MaxHeap(); !\BZ_guz
h.init(data); bl^Ihza
for(int i=0;i h.remove(); $>O~7Nfst7
System.arraycopy(h.queue,1,data,0,data.length); Y01!D"{\
} w0=
+#BOWz
private static class MaxHeap{ G(#t,}S}@
1a{r1([)
void init(int[] data){ J({D~
this.queue=new int[data.length+1]; C,l,fT
for(int i=0;i queue[++size]=data; o&%v"#H2
fixUp(size); 04;s@\yX4
} HV/:OCK
} !aF~5P7%
MAFdJ+n#
private int size=0; @g5y_G{SP
MU a[}?
private int[] queue; Z)E)-2U$@
Yr-SlO>
public int get() { Y&O2;q/B
return queue[1]; ~r8<|$;
} j;coPehB
Sf*v#?
public void remove() { jmr .gW
SortUtil.swap(queue,1,size--); uWdF7|PN7
fixDown(1); '_.qhsS
} PZ8,E{V
file://fixdown ;i6~iLY
private void fixDown(int k) { H"AL@=
int j; Hm'"I!jyO
while ((j = k << 1) <= size) { o6O-\d7^M
if (j < size %26amp;%26amp; queue[j] j++; ZJBb%d1;
if (queue[k]>queue[j]) file://不用交换 [//i "Nm
break; wX]$xZ!s
SortUtil.swap(queue,j,k); e3;D1@
k = j; QNMZR
} :\"0jQ.y|
} FJ~d&L\l
private void fixUp(int k) { "V]*ov&[
while (k > 1) { iXnXZ|M
int j = k >> 1; *GE6zGdN
if (queue[j]>queue[k]) Ex p?x
break; `X@\Zv=}
SortUtil.swap(queue,j,k); "73y}'
k = j; n~yKq"^
} 1}=D
} oa"Bpi9i
+S(# 7
} ;`7~Q
1 gjaTPwY
} /C!~v!;e
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SortUtil： n&;JW6VQS
% E1r{`p
package org.rut.util.algorithm; 2v ~8fr4
.euAN8L
import org.rut.util.algorithm.support.BubbleSort; x&;AY
import org.rut.util.algorithm.support.HeapSort; ,g7O
import org.rut.util.algorithm.support.ImprovedMergeSort; Sr6'$8#>Y
import org.rut.util.algorithm.support.ImprovedQuickSort; |9S8sfw
import org.rut.util.algorithm.support.InsertSort; ^aAs=KditO
import org.rut.util.algorithm.support.MergeSort; D|ze0A@
import org.rut.util.algorithm.support.QuickSort; #h=V@Dh
import org.rut.util.algorithm.support.SelectionSort; I(~([F2
import org.rut.util.algorithm.support.ShellSort; nzaDO-2!
1w7tRw
/** ZiuD0#"!
* @author treeroot |=IJ^y(x|
* @since 2006-2-2 75Z|meG~
* @version 1.0 np^&cY]
*/ -rcEG!
public class SortUtil { _WWC8?6U
public final static int INSERT = 1; ZUHW*U.
public final static int BUBBLE = 2; a%`Yz"<lQ
public final static int SELECTION = 3; ~>>_`;B
public final static int SHELL = 4; ),N,!15j,
public final static int QUICK = 5; UiV#w#&P
public final static int IMPROVED_QUICK = 6; j%'2^C8
public final static int MERGE = 7; a+LK~mC*
public final static int IMPROVED_MERGE = 8; PzKTEYJL
public final static int HEAP = 9; apm%\dN
:(US um
public static void sort(int[] data) { e: Sd#H!
sort(data, IMPROVED_QUICK); Fj<*!J$,
} #>aq'47j
private static String[] name={ F;#$Q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bI0xI[#Q
}; r*b+kSh
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private static Sort[] impl=new Sort[]{ xT&~{,9
new InsertSort(), #^VZJ:2=|
new BubbleSort(), iqB5h| `
new SelectionSort(), Nxt:U{`T'
new ShellSort(), &'^.>TJ\
new QuickSort(), e]1'D
new ImprovedQuickSort(), | I:@:
new MergeSort(), NL:-3W7vf
new ImprovedMergeSort(), 5XX)8gAo
new HeapSort() ktfm
}; |1CX?8)b=
i;{lY1
public static String toString(int algorithm){ 8'@5X-nD
return name[algorithm-1]; F&!vtlV)
} >#:SJ?)`T
L~/,;PHN
public static void sort(int[] data, int algorithm) { &=)O:Jfa
impl[algorithm-1].sort(data); 2LN6pu
} G 3U[)("
mmJnE
public static interface Sort { 0^S$_L
public void sort(int[] data); bj@sci(1?
} E`_T_O=P
v@QnS
public static void swap(int[] data, int i, int j) { +0U=UV)U
int temp = data; U%bm{oVn
data = data[j]; [c=P)t7 V
data[j] = temp; s?;8h &]=
} kP$E+L
} =5*Wu+S4r