[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; kTe0"
} ;.wWw" )
int i1=l; ~e@pL*s
int i2=mid+1; +w'{I`QIL0
for(int cur=l;cur<=r;cur++){ jhmWwT/O8^
if(i1==mid+1) i][af
data[cur]=temp[i2++]; ? W`?F
else if(i2>r) Vg^@6zU
data[cur]=temp[i1++]; q,H 0=\
else if(temp[i1] data[cur]=temp[i1++]; DU.nXwl]
else P0N%77p>"
data[cur]=temp[i2++]; kH10z~(e
} {@gTs
} g6=w MRt[
)$ +5imi
} <^,5z!z}
I];Hx'/<~
改进后的归并排序: l<l6Ey(
eE'2B."F
package org.rut.util.algorithm.support; "0yO~;a
kb>/R/,9
import org.rut.util.algorithm.SortUtil; gbJz5EEq
]\Tcy[5
/** U]h5Q.<SG
* @author treeroot !ENb \'>J>
* @since 2006-2-2 ?MhY;z`=
* @version 1.0 |Skxa\MI
*/ #[a+m
public class ImprovedMergeSort implements SortUtil.Sort { 8`/nk`;
{Noa4i
private static final int THRESHOLD = 10; ua-cX3E
WV'FW)%
/* G()- NJ{
* (non-Javadoc) aH1mW;,1u
* RW@sh9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k 8Swra?j
*/ k!lz_Y
public void sort(int[] data) { /o19/Pvwm
int[] temp=new int[data.length]; kN)m"}gX
mergeSort(data,temp,0,data.length-1); ~+GMn[h
} UEvRK?mm=
7TC=$y ,
private void mergeSort(int[] data, int[] temp, int l, int r) { #sq$i
int i, j, k; ;&Oma`Ec
int mid = (l + r) / 2; 9rn[46s`
if (l == r) _e;$Y#`EO
return; z$d/Vz,a
if ((mid - l) >= THRESHOLD) ,\FJVS;NeJ
mergeSort(data, temp, l, mid); 5r:SBt|/
else 9OC!\' 8
insertSort(data, l, mid - l + 1); M)U 32gI:
if ((r - mid) > THRESHOLD) HZ1e~IIw
mergeSort(data, temp, mid + 1, r); @qfVt
else v_gQCS
insertSort(data, mid + 1, r - mid); 1o;+.]B
5$e|@/(0
for (i = l; i <= mid; i++) { s C9j73vf
temp = data; .cQ<F4)!tu
} [Pu~kiN
for (j = 1; j <= r - mid; j++) { H?P:;1A]c
temp[r - j + 1] = data[j + mid]; C NNyz$
} mGXjSWsd
int a = temp[l]; ^]$x/1I;
int b = temp[r]; kphv)a4z=
for (i = l, j = r, k = l; k <= r; k++) { ( *(#;|m
if (a < b) { ^fLePsmd
data[k] = temp[i++]; J/j?;qx]j
a = temp; Xw=>L#Q
} else { DFz,>DM;
data[k] = temp[j--]; oXc!JZ^
b = temp[j]; Fvy__qcHi
} n0T\dc~
} u(7PtmV[!
} 5_@8g+~
m q`EMOH
/** iR9 $E
* @param data 4*4s{twG
* @param l 8xQ5[Ov
* @param i zUM;Qwl
*/ *N .f_s
private void insertSort(int[] data, int start, int len) { (>x4X@b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =8r%zLDw
} 3hOiHO ;
} DHO6&8S
} 9=j"kXFf
} ZkW,
a{7>7%[
堆排序： sS,Swgr
F#X&Tb{
package org.rut.util.algorithm.support; -bo5/`x
eU"!X9
import org.rut.util.algorithm.SortUtil; jmbwV,@Q2
(KDUX t.
/** Tw< N
* @author treeroot a a=GW%
* @since 2006-2-2 #7IM#tc@
* @version 1.0 G}d-L!YbE'
*/ r=<Oy1m/
public class HeapSort implements SortUtil.Sort{ fQ5VRpWGn
C:/O]slH
/* (non-Javadoc) l@a>"\><i*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :=BFx"Y
*/ Wc4F'}s
public void sort(int[] data) { Sni Ck*T,
MaxHeap h=new MaxHeap(); ')w:`8Tl
h.init(data); !>g_9'n'
for(int i=0;i h.remove(); oZxC.;xJ
System.arraycopy(h.queue,1,data,0,data.length); Ll%CeP
} 5Xu2MY=
EX%KfWDr
private static class MaxHeap{ _ cK"y2
wRn]
void init(int[] data){ [];*9vxW
this.queue=new int[data.length+1]; ab!,)^
for(int i=0;i queue[++size]=data; ?GPTJ#=j=]
fixUp(size); CpuL[|51
} t<M^/xe2
} V,<3uQD9a
#1i&!et&/
private int size=0; WG8}}`F|
LfEeFF=#n
private int[] queue; 5w)tsGX\
e`%U}_[d
public int get() { "d60IM#N?
return queue[1]; hA.?19<Z
} Vu '3%~
-y70-K3
public void remove() { Z,%^BAJ
SortUtil.swap(queue,1,size--); 6]yYiz2Xn
fixDown(1); l2"{uCcA
} 96UL](l(`
file://fixdown ")MjR1p
private void fixDown(int k) { >4>!zZ
int j; =*7K_M&
while ((j = k << 1) <= size) { {<{ O!
if (j < size %26amp;%26amp; queue[j] j++; -&JUg o=
if (queue[k]>queue[j]) file://不用交换 g5X;]%:
break; ;uj&j1
SortUtil.swap(queue,j,k); QFMR~6 ?
k = j; F!*u}8/_!
} G.Z:00x
} pj:s+7"t
private void fixUp(int k) { ?.d6!vA
while (k > 1) { \ s^a4l2
int j = k >> 1; P` Hxj> {
if (queue[j]>queue[k]) InnjZ>$
break; Gf'qPLK0
SortUtil.swap(queue,j,k); G+2!+N\P
k = j; u`I&&
} ;i*<HNQ
} | +osEHC
p|!5G&O,
} U5N/'p%)<
n qSjP5
} ]v&)mK]n=o
\vj<9ke&
SortUtil： #zflU99d
F!DDlYUz.
package org.rut.util.algorithm; ]hNio6CVm
(}ObX!,
import org.rut.util.algorithm.support.BubbleSort; Y5nj _xQJL
import org.rut.util.algorithm.support.HeapSort; ~NT2QY5!K
import org.rut.util.algorithm.support.ImprovedMergeSort; eT33&:n4
import org.rut.util.algorithm.support.ImprovedQuickSort; )Qe<XJH!
import org.rut.util.algorithm.support.InsertSort; 77D>;90>?
import org.rut.util.algorithm.support.MergeSort; f]Jn\7j4
import org.rut.util.algorithm.support.QuickSort; H9}z0VI
import org.rut.util.algorithm.support.SelectionSort; ;}v#hKC~
import org.rut.util.algorithm.support.ShellSort; "M#A `b
jdz]+Q`jq
/** 86pujXjc'
* @author treeroot m)l<2`CM
* @since 2006-2-2 B:Y"X:Y
* @version 1.0 iNj*Gj
*/ oasp/Y.p
public class SortUtil { |>_e&}Y%L
public final static int INSERT = 1; oYOR%'0*m+
public final static int BUBBLE = 2; T1,Nb>gBq^
public final static int SELECTION = 3; m)"gj**|y
public final static int SHELL = 4; NWnUXR
public final static int QUICK = 5; ^3re*u4b=
public final static int IMPROVED_QUICK = 6; M)sM G C
public final static int MERGE = 7; $*N^bj
public final static int IMPROVED_MERGE = 8; *AK{GfP_
public final static int HEAP = 9; Kvx~2ZMx6
.nDB{@#
public static void sort(int[] data) { KrVP#|9%"
sort(data, IMPROVED_QUICK); og0su
} \ZNUt$\
private static String[] name={ `sW+R=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" zt&"K0X|
}; /e|vz^#+1,
vXA+o)*#/
private static Sort[] impl=new Sort[]{ v\&C]W]
new InsertSort(), "[A]tklP
new BubbleSort(), ^j~CYzmt
new SelectionSort(), =CBY_
new ShellSort(), imb.CYS74
new QuickSort(), okwkMd-yW
new ImprovedQuickSort(), i'bviD
new MergeSort(), 'uy\vR&Pz
new ImprovedMergeSort(), ?2d! ^!9
new HeapSort() Z`jc*jgy
}; :Vdo.uUa
% YgGw:wZ
public static String toString(int algorithm){ :pz`bFJk
return name[algorithm-1]; |q+3X)Y
} b}&2j3-n,
UdGa#rcNW
public static void sort(int[] data, int algorithm) { 0eJqDCmH
impl[algorithm-1].sort(data); "~V|p3
} w?eJVi@w{
eMT}"u8$A
public static interface Sort { JSp V2c5Q
public void sort(int[] data); J}zN]|bz
} \S5YS2,P
{$ a $m
public static void swap(int[] data, int i, int j) { -_`dA^
int temp = data; X(r$OZ
data = data[j]; `1xJ1z#
data[j] = temp; 4hl`~&yDf
} z4!Y9
} FaA'%P@