[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; $`VFdAe
} $uDqqG(^
int i1=l; TDtAmk
int i2=mid+1; ]N{0:Va@D
for(int cur=l;cur<=r;cur++){ A,gEM4
if(i1==mid+1) beXNrf=bG
data[cur]=temp[i2++]; sJG5/w
else if(i2>r) hk>;pU(
data[cur]=temp[i1++]; MJ{%4S{K,p
else if(temp[i1] data[cur]=temp[i1++]; )ChqATKg
else kA wNly
data[cur]=temp[i2++]; i38[hQR9a
} [I;^^#'P
} 5W? v'"
,*I@
} gI]GUD-
H%F>@(U
改进后的归并排序: ciQZHH2
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package org.rut.util.algorithm.support; Q{g;J`Z)p
Tr&M~Lgb)
import org.rut.util.algorithm.SortUtil; 2aN<w'pA
U/l?>lOD\
/** I=DxRgt
* @author treeroot 7q=G&e7
* @since 2006-2-2 @A<PkpNL
* @version 1.0 bGF7Zh9
*/ g\SrO {*
public class ImprovedMergeSort implements SortUtil.Sort { ,XkGe
9W ^xlid6
private static final int THRESHOLD = 10; ~|ss*`CT
"=/ f$Xf
/* ^wb:C[r!V
* (non-Javadoc) >Z.\J2wM<j
* 6uPcXd:8ZR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KhbYr$
*/ q.YfC
public void sort(int[] data) { ~]C%/gEh
int[] temp=new int[data.length]; N_pUv
mergeSort(data,temp,0,data.length-1); Q Fm|-j
} p>vU?eF
v *-0M
private void mergeSort(int[] data, int[] temp, int l, int r) { @%ip7Y]e
int i, j, k; PQN@JaD
int mid = (l + r) / 2; +HT1ct+dI
if (l == r) -_C#wtC
return; LUX*P7*B
if ((mid - l) >= THRESHOLD) !k3e\v|
mergeSort(data, temp, l, mid); yifY%!@Xu
else :#~U<C@o
insertSort(data, l, mid - l + 1); KJ2Pb"s
if ((r - mid) > THRESHOLD) WI> P-D
mergeSort(data, temp, mid + 1, r); `o]g~AKX
else #|GSQJ$F)`
insertSort(data, mid + 1, r - mid); e=vsuqGT
eB>s=}|
for (i = l; i <= mid; i++) { ew _-Eb
temp = data; ?<Wb@6kh`
} w;UqEC V
for (j = 1; j <= r - mid; j++) { /H7&AiA
temp[r - j + 1] = data[j + mid]; uj>WgU
} g-c ;}qz
int a = temp[l]; 0+Ta%H{
int b = temp[r]; mm[2wfTE
for (i = l, j = r, k = l; k <= r; k++) { tVrY3)c
if (a < b) { F!zP<A"
data[k] = temp[i++]; Q\ /uKQ
a = temp; 05yZad*
} else { W&(k!6<x
data[k] = temp[j--]; !-`Cp3gqHr
b = temp[j]; *]hBGr#6
} 7>iU1zy
} g V5zSudW
} D8&`R
j~j jX
/** -=s(l.?Hm5
* @param data O,aS`u &
* @param l 2{-ZD ,(u7
* @param i I&n
*/ X@@8"@/u|*
private void insertSort(int[] data, int start, int len) { yRp"jcD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 98=wnWX6$
} H]4Hj
} (Yo>Oh4
} RrUBpqA
} .#02 ngh
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堆排序： _@S`5;4x
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package org.rut.util.algorithm.support; T91moRv
niB`2J
import org.rut.util.algorithm.SortUtil; ARcB'z\r
lL1k.&|5m
/** ;XM{o:1Y[
* @author treeroot F}Vr:~
* @since 2006-2-2 2'=T[<nNB
* @version 1.0 ifN64`AhRX
*/ uqz]J$
public class HeapSort implements SortUtil.Sort{ }D+}DPL{^
X7k.zlH7T
/* (non-Javadoc) @(r/dZc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N?Lb
*/ >pUtwIP
public void sort(int[] data) { =UyLk-P w
MaxHeap h=new MaxHeap(); jw-0M1B
h.init(data); PkI:*\R
for(int i=0;i h.remove(); 87hq{tTs]
System.arraycopy(h.queue,1,data,0,data.length); &0f5:M{P
} vfVj=DYj
9z6XF]A
private static class MaxHeap{ y;/VB,4V
(o3 Iy
void init(int[] data){ jKt7M>P
this.queue=new int[data.length+1]; l;o1 d-n]
for(int i=0;i queue[++size]=data; (#+^&1
fixUp(size); 2eMTxwt*S
} J!5$,%v
} A}eOFu`
*_>Lmm.yh
private int size=0; B)d(TP,>
pz"0J_xDM
private int[] queue; bygx]RC[
<&C]sb
public int get() { pK0"%eA
return queue[1]; *6q5S4 r
} E>l~-PaZY
9B;{]c
public void remove() { lg^Z*&(
SortUtil.swap(queue,1,size--); 7uzkp&+:
fixDown(1); kc0E%odF.v
} |i++0BU
file://fixdown 6}r`/?"A1
private void fixDown(int k) { iLSr*` o
int j; (o`{uj{!
while ((j = k << 1) <= size) { H%D$(W
if (j < size %26amp;%26amp; queue[j] j++; UX7t`l2R
if (queue[k]>queue[j]) file://不用交换 c/sC&i;%O
break; dAuJXGo
SortUtil.swap(queue,j,k); p5G?N(l
k = j; &jmRA';sK
} K6R.@BMN
} TYW&!sm
private void fixUp(int k) { wmTb97o
while (k > 1) { d3xmtG {i
int j = k >> 1; F6z%VWU
if (queue[j]>queue[k]) ;+"+3
break; V:y'Qf2M
SortUtil.swap(queue,j,k); F w?[lS
k = j; M3.do^ss
} A0Qb5e
} $< JaLS
}}59V&'t
} 4r45i:
A}l3cP; `#
} 7Op>i,HZk\
v?geCe=ng
SortUtil： v/_
5aCgjA11
package org.rut.util.algorithm; ?`?)QE8
094o'k
import org.rut.util.algorithm.support.BubbleSort; *WuID2cOI
import org.rut.util.algorithm.support.HeapSort; zolt$p
import org.rut.util.algorithm.support.ImprovedMergeSort; Z.Lc>7o
import org.rut.util.algorithm.support.ImprovedQuickSort; 7<*yS310
import org.rut.util.algorithm.support.InsertSort; +~p88;
import org.rut.util.algorithm.support.MergeSort; -qGa]a
import org.rut.util.algorithm.support.QuickSort; o2F)%TDY
import org.rut.util.algorithm.support.SelectionSort; ?{[ v+t#
import org.rut.util.algorithm.support.ShellSort; J\b^)
u ,KD4{!
/** ?{ryGhb~
* @author treeroot z:wutqru
* @since 2006-2-2 %%[LKSTb
* @version 1.0 x<ZJb
*/ Te[n,\Nb
public class SortUtil { XuFYYx~ ^3
public final static int INSERT = 1; )P sY($ &
public final static int BUBBLE = 2; Bx< <~[Ws}
public final static int SELECTION = 3; lNYt`xp
public final static int SHELL = 4; @u6B;)'l
public final static int QUICK = 5; M<v%CawS
public final static int IMPROVED_QUICK = 6; t7aefV&_,
public final static int MERGE = 7; XwJ7|cB
public final static int IMPROVED_MERGE = 8; dl.p\t(1
public final static int HEAP = 9; 3ca (i/c
%WjXg:R
public static void sort(int[] data) { 1n;0?MIZ
sort(data, IMPROVED_QUICK); ?82xdpg
} >G25m'&,7
private static String[] name={ =%TWX[w
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9dx/hFA
}; |Y,b?*UF
Hquc o
private static Sort[] impl=new Sort[]{ bKMy|_
new InsertSort(), Hx?;fl'G%
new BubbleSort(), X aMJDa|M
new SelectionSort(), W_"sM0 w
new ShellSort(), g,!L$,/F
new QuickSort(), N2;B-UF 7
new ImprovedQuickSort(), f6&iy$@
new MergeSort(), 0Qf,@^zL*
new ImprovedMergeSort(), P/W XaE4
new HeapSort() [M=7M}f;
}; QTk}h_<u
!$gR{XH$]
public static String toString(int algorithm){ )"7iJb<E
return name[algorithm-1]; AP 2_MV4W
} Pd_U7&w,5
!Dn,^
public static void sort(int[] data, int algorithm) { -lY6|79bF
impl[algorithm-1].sort(data); <Zmg#
} 1~NT.tY
qm/22:&v5
public static interface Sort { V_.5b&@
public void sort(int[] data); Q+{xZ'o"Z
} AP?R"%
&w_j/nW^'
public static void swap(int[] data, int i, int j) { YJT&{jYi
int temp = data; ~:s>aQ`!
data = data[j]; 12b(A+M
data[j] = temp; r@H /kD
} .YAT:;L
} m[~y@7AK<