[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; S2EeC&-AR
} Wk&g!FR
int i1=l; I~P]_DmM
int i2=mid+1; pz@wbu=($4
for(int cur=l;cur<=r;cur++){ )]a{cczL"
if(i1==mid+1) >YW_}kd
data[cur]=temp[i2++]; gls %<A{C
else if(i2>r) | ?])]F
data[cur]=temp[i1++]; ;/]vmgl2
else if(temp[i1] data[cur]=temp[i1++]; 2W 9N-t21
else f)/5%W7n}
data[cur]=temp[i2++]; ('7qJkV
} Rr/sxR|0_
} E[N3`"
vfZ.js/
} :#=XT9
S;]][h=
改进后的归并排序: lYt|C^
tE]0 #B)D<
package org.rut.util.algorithm.support; iO_6>&(
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import org.rut.util.algorithm.SortUtil; +)eI8o0#
5bKm)|4z6
/** "0( _
* @author treeroot K_X10/#b&
* @since 2006-2-2 W~e/3#R\=
* @version 1.0 -l#h^
*/ 6+hx64 =
public class ImprovedMergeSort implements SortUtil.Sort { ya^zlj\`0e
SZ[,(h
private static final int THRESHOLD = 10; <+wbnnK
)LP=IT
/* ;m[-yqX
* (non-Javadoc) 3RyB 0 n
* %kRQ9I".
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ..g?po
*/ @!UuK;
public void sort(int[] data) { wgb e7-{
int[] temp=new int[data.length]; z[q#Dw
mergeSort(data,temp,0,data.length-1); `X06JTqf:
} U)n+j}vi
A*r6
private void mergeSort(int[] data, int[] temp, int l, int r) { L93&.d@m9
int i, j, k; l6wN&JHTh
int mid = (l + r) / 2; !\ckUMZ\
if (l == r) '%2q'LqSA
return; Y%B:IeF}
if ((mid - l) >= THRESHOLD) XsVp7zk\
mergeSort(data, temp, l, mid); G2A^+R0\
else X_6h8n}i
insertSort(data, l, mid - l + 1); ~$O.KF:
if ((r - mid) > THRESHOLD) +l "z
mergeSort(data, temp, mid + 1, r); P'dH*}H
else tTzPT<
insertSort(data, mid + 1, r - mid); YF]W<ZpY
<ETR6r
for (i = l; i <= mid; i++) { ?%RN? O(
temp = data; rk$$gXg9/
} k{?Pgf27
for (j = 1; j <= r - mid; j++) { jC;^2e
temp[r - j + 1] = data[j + mid]; rX-V0
} sSM^net0
int a = temp[l]; 3j]P\T
int b = temp[r]; w*E0f?s
for (i = l, j = r, k = l; k <= r; k++) { zuq7 x7
if (a < b) { ac-R q.GQY
data[k] = temp[i++]; ]CFh0N|(L
a = temp; iL%Q@!ka
} else { K|n$-WDG}
data[k] = temp[j--]; vUX(h.}8
b = temp[j]; B-@ ]+W
} =sR]/XSK
} w A0$d
} Q9UBxpDV:
OJkiTs{
/** x2^Yvgc-
* @param data Z`?Z1SBt
* @param l [%8t~zg
* @param i y}'c)u
*/ 1qR[&=/
private void insertSort(int[] data, int start, int len) { 3M;[.b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @dy<=bh~
} J^Dkx"1GD
} |\1!*Qp
} aetK<9L$
} v-V#?+#
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堆排序： O[N}@%HMW
^* xhbM;
package org.rut.util.algorithm.support; AE_7sM
C&&*6E5
import org.rut.util.algorithm.SortUtil; R::0.*FF
\Bg;^6U
/** syEWc(5
* @author treeroot Q\P?[i]
* @since 2006-2-2 0I8w'/s_g9
* @version 1.0 +YL9gNN>P
*/ 8y<NT"
public class HeapSort implements SortUtil.Sort{ }mz6z<pJ_
r[>=iim
/* (non-Javadoc) 'u\my
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^yO+-A2zC
*/ %s+H& vfQs
public void sort(int[] data) { CaSoR |
MaxHeap h=new MaxHeap(); x1gfo!BN
h.init(data); yFIB/ln:
for(int i=0;i h.remove(); 0@FZQ$-
System.arraycopy(h.queue,1,data,0,data.length); :MOr?"
} .>5KwEK~
nLA8Hy"8z
private static class MaxHeap{ d"E@e21
cJ6n@\
void init(int[] data){ .|[5*-
this.queue=new int[data.length+1]; Fk:yj 4'
for(int i=0;i queue[++size]=data; \S[7-:Lu^
fixUp(size); .{cka]9WJz
} X~aD\%kC7
} QKj-"y[
kRCuc}:SB
private int size=0; &"D *
u7rA8u|TO
private int[] queue; cULASS`,
(J c} K
public int get() { HFJna2B`
return queue[1]; ;.=ZwM]C
} [fN?=,8
=hs !t|(*
public void remove() { q/ x(:yol
SortUtil.swap(queue,1,size--); $=7'Cm?
fixDown(1); Z9:erKT
} qIbp0`m
file://fixdown ;#3l&HRKH1
private void fixDown(int k) { y*Egt`W
int j; orGNza"A
while ((j = k << 1) <= size) { K~j&Q{yws@
if (j < size %26amp;%26amp; queue[j] j++; 2v ^bd^]u:
if (queue[k]>queue[j]) file://不用交换 \q2#ef@2
break; o80"ZU|=
SortUtil.swap(queue,j,k); /~w!7n<7
k = j; 7j9:s>D
} 6mP s;I
} 5r=xhOe`
private void fixUp(int k) { d(.e%[`
while (k > 1) { mv7><C
int j = k >> 1; D&Xh|}2A
if (queue[j]>queue[k]) (1~d/u?2\
break; e rz9CX
SortUtil.swap(queue,j,k); m/,.3v
k = j; K[tQ>C@s2
} T3HAr9i%)
} Yp_ L.TTb
}?"}R<F|M,
} wVSM\
hT`kma
} 3;M7^DM
mWOW39Ku
SortUtil： pmm?Fq!s=
yN9k-IPI
package org.rut.util.algorithm; i/ED_<_Vg
6#Ag^A
import org.rut.util.algorithm.support.BubbleSort; mR3)$!
import org.rut.util.algorithm.support.HeapSort; 2TH13k$
import org.rut.util.algorithm.support.ImprovedMergeSort; Tr}z&efY
import org.rut.util.algorithm.support.ImprovedQuickSort; [E9V#J89
import org.rut.util.algorithm.support.InsertSort; sVk+E'q
import org.rut.util.algorithm.support.MergeSort; EV1x"}D A_
import org.rut.util.algorithm.support.QuickSort; DuESLMhz
import org.rut.util.algorithm.support.SelectionSort; Yt]tRqrh;T
import org.rut.util.algorithm.support.ShellSort; 42`%D
N?xZ]?T
/** 6f"jl
* @author treeroot _|f1q
* @since 2006-2-2 &|/@;EA$8
* @version 1.0 4*k>M+o/C4
*/ G`n|fuv
public class SortUtil { IM.sW'E
public final static int INSERT = 1; j7(sYo@x7
public final static int BUBBLE = 2; glMYEGz6p
public final static int SELECTION = 3; 9Fo00"q
public final static int SHELL = 4; 4?+K:e #F
public final static int QUICK = 5; t=,ZR}M1`
public final static int IMPROVED_QUICK = 6; |l4tR
public final static int MERGE = 7; CSKOtqKQ)
public final static int IMPROVED_MERGE = 8; cyM9[X4rC
public final static int HEAP = 9; 3.i$lp`t
@uh^)6i]/
public static void sort(int[] data) { ~lBb%M
sort(data, IMPROVED_QUICK); '}4z=f`}
} 7a$K@iWU
private static String[] name={ [&_7w\m
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H7`JqS
}; ;rggO0Y
\9HpbCHr
private static Sort[] impl=new Sort[]{ ~]sj.>P
new InsertSort(), pUcN-WA
new BubbleSort(), /KU9sIE;
new SelectionSort(), m:6^yfS
new ShellSort(), 1c5+XCr
new QuickSort(), pZE}<EX
new ImprovedQuickSort(), ro&/
new MergeSort(), ,9A1p06
new ImprovedMergeSort(), Z\YCjs%
new HeapSort() yH=Hrz:<eM
}; C VXz>oM
(:(Imk;9
public static String toString(int algorithm){ Yvi.l6JL
return name[algorithm-1]; ABx< Ep6
} V4#bW
OO?;??
public static void sort(int[] data, int algorithm) { H=/;
impl[algorithm-1].sort(data); V=i/cI\
} <<FBT`Y[
w@![rH6~F
public static interface Sort { {4F=].!
public void sort(int[] data); yG' 5:
} WMw|lV r
>Ut4INV
public static void swap(int[] data, int i, int j) { ;b`kN;s
int temp = data; |e QwI&
data = data[j]; :5'8MU
data[j] = temp; lcX'n8/3
} 67tB8X
} ]/#3 P