[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; Kzwe36O;?
} yv$hIU2X
int i1=l; $5Rx>$~+d
int i2=mid+1; B? XK;*])
for(int cur=l;cur<=r;cur++){ oS_YQOoD
if(i1==mid+1) @?t+O'&
data[cur]=temp[i2++]; A "'h0D
else if(i2>r) ~D/1U)kt
data[cur]=temp[i1++]; N4WX}
else if(temp[i1] data[cur]=temp[i1++]; A 0;ng2&
else e_1L J
data[cur]=temp[i2++]; xi)M8\K
} 1XHE:0!dQ
} ?|n@%'
vOtILL6
} >V>GiSni
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改进后的归并排序: 0P;LH3sx
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package org.rut.util.algorithm.support; t^~itlE{
r[2*K 9
import org.rut.util.algorithm.SortUtil; sAF="uB
F-D$Y?m
/** t\n'Kuk`
* @author treeroot 2>Qy*
* @since 2006-2-2 [X@JH6U r
* @version 1.0 DJ!pZUO{
*/ Pup%lO`.0
public class ImprovedMergeSort implements SortUtil.Sort { =n8M'
6ywOL'OBM
private static final int THRESHOLD = 10; mdcsL~R
J{nA ?[
/* )6px5Vwz
* (non-Javadoc) iD>H{1 h
* NpS =_QeNw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IPt !gSp
*/ z|$9%uz"
public void sort(int[] data) { FY/F}C,o
int[] temp=new int[data.length]; U8<C4
mergeSort(data,temp,0,data.length-1); s/P+?8'9
} _k(&<1i
>g{b'Xx
private void mergeSort(int[] data, int[] temp, int l, int r) { /!*=*
int i, j, k; 0sF|Y%N
int mid = (l + r) / 2; YuoIhT
if (l == r) `9acR>00$
return; d$n<^~Z
if ((mid - l) >= THRESHOLD) Z!l]v.S
mergeSort(data, temp, l, mid); Nema>T]
else G"Hj$
insertSort(data, l, mid - l + 1); #E_<}o
if ((r - mid) > THRESHOLD) #+|0o-
mergeSort(data, temp, mid + 1, r); qga?-oz,<6
else q&LCMnv"P
insertSort(data, mid + 1, r - mid); ylQ9Su>o
A}_pJH
for (i = l; i <= mid; i++) { A5sz[k
temp = data; J58S8:c
} ^RYq !l$
for (j = 1; j <= r - mid; j++) { Nc?'},
temp[r - j + 1] = data[j + mid]; KD--w(4
} `A8ErfA
int a = temp[l]; sR)jZpmC(
int b = temp[r]; 9d!mGnl
for (i = l, j = r, k = l; k <= r; k++) { nt%p@e!,
if (a < b) { Hv%$6,/*v
data[k] = temp[i++]; V$dhiP z
a = temp; Fj"/jdM
} else { pfFHuS~
data[k] = temp[j--]; |ZOdfr4uW
b = temp[j]; 9xFI%UOb#
} X<g }F[Y
} `X<a(5[vV3
} MXDUKh7v3
Ms-)S7tMz
/** "ZFH_5<
* @param data #WAX&<m
* @param l a TPq1u
* @param i v3<q_J'qT
*/ Xx\,<8Xn
private void insertSort(int[] data, int start, int len) { e-b>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); GH`y-Ul'K
} 4^:$|\?]
} (ki= s+W-
} 0!tuUn
} xT!<x({
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堆排序： Bi>]s%zp
s5)y%,E
package org.rut.util.algorithm.support; %N0m$*
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import org.rut.util.algorithm.SortUtil; jWdZ]0m
g2A#BMe'.$
/** >B;KpO"+m
* @author treeroot ]kF1~kXBe
* @since 2006-2-2 + f:!9)C
* @version 1.0 zU_dk'&,
*/ %OP|%^2
public class HeapSort implements SortUtil.Sort{ iU(B#ohW"
e&!8UYP
/* (non-Javadoc) Qraa0]56
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #qeC)T
*/ *eI{g
public void sort(int[] data) { 4 =T_h`
MaxHeap h=new MaxHeap(); 8]rObT9>
h.init(data); RF~G{wz
for(int i=0;i h.remove(); </aQ
System.arraycopy(h.queue,1,data,0,data.length); "F4 3q8P
} ?-8DS5
h.NCG96S
private static class MaxHeap{ 8q; aCtei
%P:|B:\<
void init(int[] data){ [6Sk>j
this.queue=new int[data.length+1]; vG\ b`
for(int i=0;i queue[++size]=data; @jrxbo;5
fixUp(size); O2"V'(
} ln8es{q
} %,zHS?)l
r|i)
private int size=0; ^dE[ ;
n~tb z"&
private int[] queue; G\^<MR|
O- LwX >
public int get() { M}q;\}
return queue[1]; QS1lg
} ($W%&(:/
}>V=J aG
public void remove() { w\{#nrhYU
SortUtil.swap(queue,1,size--); hTmJ ~m'J
fixDown(1); 6\`8b&'n
} i'\-Y]?[
file://fixdown ?CcX>R-/
private void fixDown(int k) { D0z[h(m
int j; F/3L^k]
while ((j = k << 1) <= size) { B+Ft >
if (j < size %26amp;%26amp; queue[j] j++; KVUub'k
if (queue[k]>queue[j]) file://不用交换 $`lm]} {&
break; ~$hR:I1
SortUtil.swap(queue,j,k); .?LRt
k = j; k!'+7K.
} MU\Pggs
} #)]/wqPoW
private void fixUp(int k) { mIqm/5
while (k > 1) { '?g&);4)k-
int j = k >> 1; 0Ng?U+6
if (queue[j]>queue[k]) ;zV<63tW
break; uX]]wj-R3
SortUtil.swap(queue,j,k); <K,X5ctM}
k = j; eZ-fy,E
} @u:`
} w~Nat7nD
Cpy&2o-%v
} }X/YMgJ
_6'@#DN
} c27(en(
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SortUtil： rS8\Vf]F
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package org.rut.util.algorithm; AjoIL
oN%zpz;OR
import org.rut.util.algorithm.support.BubbleSort; %r*,m3d
import org.rut.util.algorithm.support.HeapSort; %~8f0B|im
import org.rut.util.algorithm.support.ImprovedMergeSort; S?J(VJqE
import org.rut.util.algorithm.support.ImprovedQuickSort; `"<hO 'WU
import org.rut.util.algorithm.support.InsertSort; lP*=4Jh
import org.rut.util.algorithm.support.MergeSort; `AvK=]
import org.rut.util.algorithm.support.QuickSort; ,np|KoG|M
import org.rut.util.algorithm.support.SelectionSort; 5FF28C)>/
import org.rut.util.algorithm.support.ShellSort; V>GJO(9
?mSZQF:d@
/** NJVkn~<
* @author treeroot dQ9W40g1
* @since 2006-2-2 1eEML"
* @version 1.0 }pnp._j
*/ z( }w|
public class SortUtil { -;FAS3(wy
public final static int INSERT = 1; ;Krb/qr4_
public final static int BUBBLE = 2; x'..j5
public final static int SELECTION = 3; x%HxM~&
public final static int SHELL = 4; ]<L~f~vU
public final static int QUICK = 5; g j]8/~lr
public final static int IMPROVED_QUICK = 6; 5\w*W6y
public final static int MERGE = 7; 78~/1-
public final static int IMPROVED_MERGE = 8; m^3j|'mG
public final static int HEAP = 9; 11kyrv
jb{9W7;RL
public static void sort(int[] data) { *'aouS/?<6
sort(data, IMPROVED_QUICK); dU2;
} !`1m.
private static String[] name={ O:pg+o&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |v5 ge3-
}; ~I%164B+/
nZ(wfNk
private static Sort[] impl=new Sort[]{ =&qH%S6
new InsertSort(), >5"e<mwD7d
new BubbleSort(), E)f9`][
new SelectionSort(), gA}<Y
new ShellSort(), 4VwMl)8ic
new QuickSort(), S]~5iO_bst
new ImprovedQuickSort(), b18f=<#
new MergeSort(), j3T)gFP
new ImprovedMergeSort(), ,4 _H{+M
new HeapSort() m<kJH<!j
}; V2M4g
1 A0BM
public static String toString(int algorithm){ ~J>;l s1
return name[algorithm-1]; BHYguS^qz
} .XiO92d9
vyB{35p$
public static void sort(int[] data, int algorithm) { vw(ecs^C
impl[algorithm-1].sort(data); $p&eS_f
} 3dLqlJ^7B
+`>E_+Mp
public static interface Sort { (C"q-0?n
public void sort(int[] data); Xw<;)m
} &=$f\O1Ty
Dj'?12Onu=
public static void swap(int[] data, int i, int j) { KG9-ac
int temp = data; _~ei1 G.R
data = data[j]; O!XSU,
data[j] = temp; 6w{_+=T
} fjl9*
} LL)t)