[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; ,Mu"r!MK
} 'R n\CMTH
int i1=l; "A}2iI
int i2=mid+1; pxQh;w
for(int cur=l;cur<=r;cur++){ >6z7.d
if(i1==mid+1) ]Mgxv>zRbs
data[cur]=temp[i2++]; `n%8y I%
else if(i2>r) v-}D>)M^W
data[cur]=temp[i1++]; t,yMO
else if(temp[i1] data[cur]=temp[i1++]; D{]9s
else $4>x4*
data[cur]=temp[i2++]; EvDg{M}
} dYp} R>+
} BbNl:`
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} t[bZg9;
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改进后的归并排序: frbeCBP&)
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package org.rut.util.algorithm.support; m^1'aO_;q
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import org.rut.util.algorithm.SortUtil; vb]H$@0
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/** x1 1ug
* @author treeroot !;&{Q^}
* @since 2006-2-2 MZ<BCRB
* @version 1.0 (L7%V !
*/ M}!E :bv'
public class ImprovedMergeSort implements SortUtil.Sort { S>EO6z#
,) 3Eog\-
private static final int THRESHOLD = 10; 0d #jiG
EceD\}
/* A@ 4Oq
* (non-Javadoc) Qr*7bE(a
* x@,B))WlGr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [kPF Jf
*/ SQI =D8
public void sort(int[] data) { h Ap(1h#m
int[] temp=new int[data.length]; )gKX+'
mergeSort(data,temp,0,data.length-1); A!aki}aT~
} Vg8c}>7
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private void mergeSort(int[] data, int[] temp, int l, int r) { $ud\CU:r
int i, j, k; =_9grF-
int mid = (l + r) / 2; tp3 !6I6
if (l == r) Q`(h
return; ;Qdw$NuW
if ((mid - l) >= THRESHOLD) ]*pro|
mergeSort(data, temp, l, mid); ~#9(Q
else !l#n.Fx&3
insertSort(data, l, mid - l + 1); [X'u={
if ((r - mid) > THRESHOLD) {{e+t8J??
mergeSort(data, temp, mid + 1, r); \PgMMc4'
else LE4P$%>H
insertSort(data, mid + 1, r - mid); hYU4%"X
>r5s>A[YC
for (i = l; i <= mid; i++) { s N|7
temp = data; ~<Sb:Izld
} VW*d*!
for (j = 1; j <= r - mid; j++) { n~G-X
temp[r - j + 1] = data[j + mid]; A&($X)t
} Qwu~{tf+'
int a = temp[l]; 137:T:
int b = temp[r]; 7q|51rZz
for (i = l, j = r, k = l; k <= r; k++) { cXG$zwS\
if (a < b) { Q[.HoqWK
data[k] = temp[i++]; ?cD2EX%(
a = temp; >p@v'h/Cr
} else { \}+b_J6-
data[k] = temp[j--]; 8+OcM ;0
b = temp[j]; ''~#tK f
} L&h90Az1W
} /yO|Q{C}M8
} \N"=qw^ t
FW--|X]8
/** qQx5n
* @param data :x/L.Bz
* @param l eJtfQ@?
* @param i oBZzMTPe
*/ i4^1bd
private void insertSort(int[] data, int start, int len) { -|nHwSrCZ/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Iji9N!Yx
} %SlF7$
} B_#U|10et
} c6f[^Q%#j
} 'r_NA!R
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堆排序： 15tT%TC
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package org.rut.util.algorithm.support; m*Q*{M_e
bf1EMai"
import org.rut.util.algorithm.SortUtil; "fX9bh^
m03]SF(#3
/** 7z^\}&
* @author treeroot t~@~XI5
* @since 2006-2-2 w*7BiZ{s<
* @version 1.0 H_<hZUB
*/ >lIQM3
public class HeapSort implements SortUtil.Sort{ /$,~|X;&
EoD[,:*
/* (non-Javadoc) La#otuw+?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) STY\c5
*/ :r,o-D
public void sort(int[] data) { `' "125T
MaxHeap h=new MaxHeap(); l&LrcM
h.init(data); UpIt"+d2&
for(int i=0;i h.remove(); yCLDJ%8
System.arraycopy(h.queue,1,data,0,data.length); |#_`aT"
} wc.T;(
/!L#cUog
private static class MaxHeap{ !Al?B9KJ
22gk1'~dO
void init(int[] data){ kz+OUA@~
this.queue=new int[data.length+1]; ;&v~tD7
for(int i=0;i queue[++size]=data; ri?>@i-9=
fixUp(size); uy^vQ/
} v;m}<3@'
} e;ej/)no`
="*:H)
private int size=0; Q4vl
FJl_2
private int[] queue; }uaRS9d
H6I]GcZ$
public int get() { vOKWi:-U
return queue[1]; Ug1n4X3FKn
} lE@ V>%b
d}`Z| ex
public void remove() { 8Q2qroT
SortUtil.swap(queue,1,size--); ':jsCeSB
fixDown(1); @CJ`T&
} edv&!
file://fixdown ;5(ptXX1W
private void fixDown(int k) { 8vL2<VT;
int j; /PuN+M
while ((j = k << 1) <= size) { SlRQi:
if (j < size %26amp;%26amp; queue[j] j++; B"rfR_B2M#
if (queue[k]>queue[j]) file://不用交换 f8c'`$O
break; _R 6+bB$
SortUtil.swap(queue,j,k); ySEhi_)9^
k = j; Xi~%,~
} 2l#c?]TA
} GV"HkE;
private void fixUp(int k) { VX<jg#(
while (k > 1) { -4!9cE
int j = k >> 1; l#;DO9
if (queue[j]>queue[k]) 2iJ)K rw
break; `$5 QTte
SortUtil.swap(queue,j,k); Arzyq_ Yk
k = j; v==b. 2=
} {-fhp@;
} m\hzQ9
?Dr K2;q
} lPywrTG0
[m9Iz!E
} %Ct^{k~1
nGqD{!i<
SortUtil： O^+H:Y|
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package org.rut.util.algorithm; 5UgxuuP4
8o SNnT
import org.rut.util.algorithm.support.BubbleSort; \(db1zmS~
import org.rut.util.algorithm.support.HeapSort; xR`W9Z5
import org.rut.util.algorithm.support.ImprovedMergeSort; v3ky;~ke
import org.rut.util.algorithm.support.ImprovedQuickSort; OdrnPo{
import org.rut.util.algorithm.support.InsertSort; (&)PlIi7
import org.rut.util.algorithm.support.MergeSort; 4|#@41\ B
import org.rut.util.algorithm.support.QuickSort; jrKRXS
import org.rut.util.algorithm.support.SelectionSort; UbnX%2TW
import org.rut.util.algorithm.support.ShellSort; Hido[
1YrIcovi-
/** ZVin+z
* @author treeroot +6$|No
* @since 2006-2-2 ,R~{$QUl
* @version 1.0 k)t_U3i
*/ 7l~d_<h
public class SortUtil { H`:2J8
public final static int INSERT = 1; Hv~&RZpe
public final static int BUBBLE = 2; abW[hp
public final static int SELECTION = 3; ruKm_j#J
public final static int SHELL = 4; +=:*[JEK,U
public final static int QUICK = 5; pp2,d`01[L
public final static int IMPROVED_QUICK = 6; RiPxz=kr
public final static int MERGE = 7; !)1gGXRY
public final static int IMPROVED_MERGE = 8; %\|9_=9Wn
public final static int HEAP = 9; Us.")GiHE
~mR@L`"l
public static void sort(int[] data) { t6+c"=P#
sort(data, IMPROVED_QUICK); ]"2;x
} C2[* $ 1U
private static String[] name={ .EF(<JC?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [@&0@/s*t'
}; K|{IX^3)V
? +q(,P@*
private static Sort[] impl=new Sort[]{ Wz%b,!
new InsertSort(), R.(fo:ve>
new BubbleSort(), 0,z3A>C
new SelectionSort(), dx&!RK+
new ShellSort(), 6VsgZ"Il
new QuickSort(), x/B1\U I
new ImprovedQuickSort(), UK7pQt}9
new MergeSort(), p";5J+?(
new ImprovedMergeSort(), 'BiR ,M$mY
new HeapSort() =Lc!L !(,b
}; Hrk]6*
FoNkISzW
public static String toString(int algorithm){ Ki,SFww8r
return name[algorithm-1]; 3tjF4C>h|
} &qjc+-r{l
1z6$>{FUR
public static void sort(int[] data, int algorithm) { wOLDHg_
impl[algorithm-1].sort(data); ILU7Yhk
} d5z=fH9
n`Y"b&
public static interface Sort { 0|J]EsPxu
public void sort(int[] data); "?X,);5S
} A5\00O~
X9-WU\?UC
public static void swap(int[] data, int i, int j) { nqFJNK]a
int temp = data; ){I0
data = data[j]; (^@rr[.o7
data[j] = temp; d:X@zUR*)
} C$+z1z.!
} IW{}l=D/