[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; gldAP:
} aj-Km`5r}
int i1=l; k%]3vRo<
int i2=mid+1; YU'k#\gi*
for(int cur=l;cur<=r;cur++){ aG-vtld
if(i1==mid+1) $f$SNx)),
data[cur]=temp[i2++]; |QF7 uV
else if(i2>r) nQF(vTDN
data[cur]=temp[i1++]; %e8@*~h@
else if(temp[i1] data[cur]=temp[i1++]; BwN0!lsF3
else pE3?"YO
data[cur]=temp[i2++]; vSGH[nyCY
} =eq[:K<6
} :p1u(hflS
7zl5yKN
} ] 7[ 3>IN
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改进后的归并排序: vRYQ{:
M:=J^0
package org.rut.util.algorithm.support; T )&A2q
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import org.rut.util.algorithm.SortUtil; Ucb F|vkI
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/** 1>.Ev,X+e
* @author treeroot VnSCz" ?3
* @since 2006-2-2 ?=u\n;w)
* @version 1.0 ob!P;]T
*/ _f7 9wx\B
public class ImprovedMergeSort implements SortUtil.Sort { ,=uD^n:
mn'A9er
private static final int THRESHOLD = 10; c rQ8q;:
w$>u b@=
/* 8:q1~`?5"b
* (non-Javadoc) %6t:(z
* OMky$d#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qry@ s5
*/ ;'gWu
public void sort(int[] data) { xW+6qtG`
int[] temp=new int[data.length]; 9V a}I-
mergeSort(data,temp,0,data.length-1); '"52uZ{
} ^23~ZHu
5frX
private void mergeSort(int[] data, int[] temp, int l, int r) { 9v#CE!
int i, j, k; k<z)WNBf
int mid = (l + r) / 2; :S]\0;8]
if (l == r) ,10=
return; Q1lyj7c#x
if ((mid - l) >= THRESHOLD) M+oHtX$
mergeSort(data, temp, l, mid); XjBW9a
else HGl|-nW>
insertSort(data, l, mid - l + 1); TbMW|0 #w
if ((r - mid) > THRESHOLD) \a<wKTkn
mergeSort(data, temp, mid + 1, r); hy9\57_#
else 1l9G[o *
insertSort(data, mid + 1, r - mid); Oz.HH
EX*HiZU>
for (i = l; i <= mid; i++) { _OYasJUMG
temp = data; 2bz2KB5>
} //B&k`u
for (j = 1; j <= r - mid; j++) { ;2G*wR
temp[r - j + 1] = data[j + mid]; &.3"Uo\#
} &*o=I|pQ
int a = temp[l]; }ZYd4h|g\z
int b = temp[r]; 3s*mbk[J
for (i = l, j = r, k = l; k <= r; k++) { A]*}HZ,
if (a < b) { fT|.@%"vc
data[k] = temp[i++]; Od,=mO*.Q
a = temp; ~"gA,e-)
} else { cF*TotU_m
data[k] = temp[j--]; :S]%6gb8G
b = temp[j]; c&6I[R
} eb"VE%+Hu
} -au^;CM
} xl{=Y< ;
]dVGUG8
/** 4>YR{
* @param data cs48*+m
* @param l _r#Z}HK
* @param i qyb?49I
*/ H;mSkRD3N
private void insertSort(int[] data, int start, int len) { VD AaYDi
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "37lx;CH
} _=r6=.
} /*~EO{o
} qfF~D0}
} D'>_I.
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堆排序： A.F%Ycq
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package org.rut.util.algorithm.support; :+|Z@KB
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import org.rut.util.algorithm.SortUtil; h_IDO%
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/** df#$9-
* @author treeroot p >t#@Eu|
* @since 2006-2-2 JNUt$h
* @version 1.0 zeC RK+-
*/ }HePZ{PLM
public class HeapSort implements SortUtil.Sort{ +|89>}w4
KX7>^Bt&k
/* (non-Javadoc) 6,9>g0y'NG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PJrtMAcKq
*/ xDoC(
public void sort(int[] data) { (<oyN7NT
MaxHeap h=new MaxHeap(); >:!X.TG$
h.init(data); y(pks$
for(int i=0;i h.remove(); s1=G;
System.arraycopy(h.queue,1,data,0,data.length); &<U0ZvrsH
} ]Y8<`;8/
BV upDGh3
private static class MaxHeap{ !*. -`$x
V2|aN<Sx<
void init(int[] data){ :|8M`18lZ
this.queue=new int[data.length+1]; qF-@V25P
for(int i=0;i queue[++size]=data; W=qVc
fixUp(size); j578)!aJ
} 6N S201o
} O[)kboY
5m(^W[u `
private int size=0; Q &K
vf%&4\ib
private int[] queue; ,.1Psz^U
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public int get() { qd)/9*|Jl
return queue[1]; krvp&+uX
} hUMf"=q+
%pd,%pg
public void remove() { Z>Wg*sZy)
SortUtil.swap(queue,1,size--); qC:raH_:
fixDown(1); QTXt8I
} 4X |(5q?
file://fixdown os={PQRD
private void fixDown(int k) { g($DdKc|g
int j; '>0fWBs
while ((j = k << 1) <= size) { <drODjB
if (j < size %26amp;%26amp; queue[j] j++; \EtQ5T*u
if (queue[k]>queue[j]) file://不用交换 a^zibPG
break; c%G{#}^2
SortUtil.swap(queue,j,k); /M4{Wc
k = j; T iiWp!mX
} .1Al<OLL
} [t@Mn
private void fixUp(int k) { &wCg\j_c
while (k > 1) { ,+xB$e
int j = k >> 1; c>RFdc:U
if (queue[j]>queue[k]) q):5JXql~
break; 9-DZU,`P
SortUtil.swap(queue,j,k); EYEnN
k = j; h+&OQ%e=8
} `FTy+8mw
} =mpVYA
d0Qd$ .%A
} W=vP]x >J
IrhA+)pdse
} QPg8;O
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SortUtil： Slher0.Y
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package org.rut.util.algorithm; S(8$S])0
a$"Hvrj
import org.rut.util.algorithm.support.BubbleSort; ime\f*Fg
import org.rut.util.algorithm.support.HeapSort; ?_vakJ )
import org.rut.util.algorithm.support.ImprovedMergeSort; A?%H=>v$
import org.rut.util.algorithm.support.ImprovedQuickSort; 4.=3M
import org.rut.util.algorithm.support.InsertSort; >eB\(EP
import org.rut.util.algorithm.support.MergeSort; }w<7.I
import org.rut.util.algorithm.support.QuickSort; TbGn46!:
import org.rut.util.algorithm.support.SelectionSort; Dg?70v<a
import org.rut.util.algorithm.support.ShellSort; \LppYXz
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/** C/kW0V7
* @author treeroot -[!P!d=
* @since 2006-2-2 RyK\uv
* @version 1.0 R0vIbFwj
*/ 4K\(xd&Q
public class SortUtil { qA$*YIlK
public final static int INSERT = 1; cmg^J
public final static int BUBBLE = 2; %$Z7x\_
public final static int SELECTION = 3; T'&I{L33Y
public final static int SHELL = 4; @zz1hU
public final static int QUICK = 5; 4 G-wd
public final static int IMPROVED_QUICK = 6; "a"]o
public final static int MERGE = 7; -VTkG]{`Ir
public final static int IMPROVED_MERGE = 8; 'BPp ]R#{
public final static int HEAP = 9; 6&l+0dq
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public static void sort(int[] data) { i2(1ki/|O
sort(data, IMPROVED_QUICK); s,n0jix@
} T{Uc:Z
private static String[] name={ ;R?I4}O#R8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *nsAgGKKM^
}; y+6o{`0
:2-pjkhiwY
private static Sort[] impl=new Sort[]{ MxcFvo*LCp
new InsertSort(), Xo*%/0q'
new BubbleSort(), dwd:6.J(
new SelectionSort(), '@CR\5 @
new ShellSort(), OP|8Sk6 r
new QuickSort(), e-*.Ca
new ImprovedQuickSort(), ^=SD9V
new MergeSort(), 3UQ;X**F
new ImprovedMergeSort(), B7<Kc
new HeapSort() -!L"')
}; X'% ;B
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public static String toString(int algorithm){ !G}+E2fDA
return name[algorithm-1]; S (N\cw$
} r~nsN*t
+_xOLiu
public static void sort(int[] data, int algorithm) { YxinE`u~
impl[algorithm-1].sort(data); dwv6;x
} 2'<[7!
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public static interface Sort { [ $T(WGF
public void sort(int[] data); fb:j%1WF
} /q$,'^.A
(?! ,p^
public static void swap(int[] data, int i, int j) { "a/ Q%.P
int temp = data; {]]|5 \F
data = data[j]; m&iH2|
data[j] = temp; v[n7"
} D.6,VY H
} -+em!g'