[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; I0]"o#LjT
} ]6 vqgu
int i1=l; Lmw{ `R
int i2=mid+1; \~`qE<Q/
for(int cur=l;cur<=r;cur++){ 0&|,HK
if(i1==mid+1) "J (.dg]"
data[cur]=temp[i2++]; Afq?Ps+
else if(i2>r) ~\D H[Mt
data[cur]=temp[i1++]; (8/Qt\3jv
else if(temp[i1] data[cur]=temp[i1++]; -(YdK8
else aok,qn'j
data[cur]=temp[i2++]; l#G }j^Q
} #3o]Qo[Sc
} Rooem dCM
kVu-,OU
} B)`^/^7
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改进后的归并排序: /o=,\kM
p$A`qx<M_
package org.rut.util.algorithm.support; KV$J*B Y
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import org.rut.util.algorithm.SortUtil; a,U@ !}K
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/** H<6/i@ly
* @author treeroot ,0R2k `m!
* @since 2006-2-2 W!G2$e6
* @version 1.0 pr(16P
*/ $6]7>:8mz
public class ImprovedMergeSort implements SortUtil.Sort { N}2xt)JZz
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private static final int THRESHOLD = 10; k(v8zDq*
* 5Y.9g3)Q
/* KU}HVM{
* (non-Javadoc) 2!^[x~t
* `X7ns?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M1f^Lx
*/ X@ Gm:6
public void sort(int[] data) { I=3e@aTZ,
int[] temp=new int[data.length]; uY;2tZldf=
mergeSort(data,temp,0,data.length-1); {%;KkC8=R
} Ck0R%|
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private void mergeSort(int[] data, int[] temp, int l, int r) { GL_a`.=@
int i, j, k; .h8%zB#|i
int mid = (l + r) / 2; iEf6oM
if (l == r) Eb<iR)e H=
return; = ?hx+-'
if ((mid - l) >= THRESHOLD) ' 1aU0<
mergeSort(data, temp, l, mid); fuxBoB
else "A_WU|
insertSort(data, l, mid - l + 1); o(/(`/
if ((r - mid) > THRESHOLD) 3eg<)
mergeSort(data, temp, mid + 1, r); $I7/FZP
else 3T3p[q4
insertSort(data, mid + 1, r - mid); YJ`[$0mam
( |1 $zF+
for (i = l; i <= mid; i++) { S)0bu(a`Z,
temp = data; t;@VsQ8
} Pb|'f(
for (j = 1; j <= r - mid; j++) { LyB$~wZx~@
temp[r - j + 1] = data[j + mid]; EMe6Z!k
} Gd~Xvw,u
int a = temp[l]; ZN2g(
int b = temp[r]; t_q`wKDE
for (i = l, j = r, k = l; k <= r; k++) { nJ|8#U7
if (a < b) { .wD>0Ig
data[k] = temp[i++]; <~}t;ji
a = temp; qG/a5i
} else { t/bDDV"
data[k] = temp[j--]; VT\o=3_
b = temp[j]; o4b!U%
} _ID2yJ
} Oifu ?f<r
} X"W%(x`w
PomX@N}1
/** =$g8"[4
* @param data 22|f!la8n
* @param l ~7!J/LHg
* @param i pQxaT$
*/ =De%]]>
private void insertSort(int[] data, int start, int len) { g]V}azLr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 1@Bq-2OD4
} dyjzF`H
} W&]grG2/
} Z3G>DF:$
} PiZt?r?5w|
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堆排序： 0:**uion
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package org.rut.util.algorithm.support; EvMhNq~y5
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import org.rut.util.algorithm.SortUtil; !UD62yw~
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/** Hi{c[;
* @author treeroot QJo)
* @since 2006-2-2 Xu$xO(
* @version 1.0 -pj&|< h+9
*/ ke~O+]
public class HeapSort implements SortUtil.Sort{ _y)#N<
J[UL f7:
/* (non-Javadoc) 0gVylQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "JSg/optc
*/ 7g5sJj
public void sort(int[] data) { +V&b<y;?>
MaxHeap h=new MaxHeap(); ;0}$zy1EZ
h.init(data); WZRrqrjq
for(int i=0;i h.remove(); A~-e?.
System.arraycopy(h.queue,1,data,0,data.length); K$Y!d"D
} g!7/iKj:
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private static class MaxHeap{ v|jBRKU99
E`>-+~ZUsk
void init(int[] data){ {so"xoA^c
this.queue=new int[data.length+1]; K/G|MT)
for(int i=0;i queue[++size]=data; /yIkHb^c
fixUp(size); /Z>#lMg\.
} :9c QK]O6
} Mno4z/4{A
xrO:Y!C?
private int size=0; _U$d.B'*)z
!O)Ruwy
private int[] queue; !$St=!
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public int get() { FgRlxz
return queue[1]; YmHn*N}:U
} lcvWx%/o@
l{aXX[E&1
public void remove() { ;,Sl+)@h
SortUtil.swap(queue,1,size--); f6^H Q1SSt
fixDown(1); (I,PC*:
} j0o_``
file://fixdown 8;.WX
private void fixDown(int k) { g!D?Yj4
int j; Bfaj4i;_
while ((j = k << 1) <= size) { zp"sM z]
if (j < size %26amp;%26amp; queue[j] j++; rO 6oVz#x
if (queue[k]>queue[j]) file://不用交换 ;04doub
break; sxl29y^*
SortUtil.swap(queue,j,k); `#2}[D
k = j; 2#ha Icm"
} h5x FP
} pF#nj`L
private void fixUp(int k) { '(kGc%
while (k > 1) { >mT2g
int j = k >> 1; >!wX%QHH
if (queue[j]>queue[k]) &K)c*'l
break; {Rjj
SortUtil.swap(queue,j,k); [1dlV/
k = j; RMmDcvM"k
} # o)a`,f
} [Pby d
pb}QP
} \8=>l?P
!u~( \Rb;
} Yc/rjEn7O
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SortUtil： <y\>[7Y
(5;w^E9*n;
package org.rut.util.algorithm; 1Xt%O86
[$]vi`c2
import org.rut.util.algorithm.support.BubbleSort; d;9 X1`"
import org.rut.util.algorithm.support.HeapSort; QOEcp% 6I}
import org.rut.util.algorithm.support.ImprovedMergeSort; xg/3*rL
import org.rut.util.algorithm.support.ImprovedQuickSort; 6N:fq
import org.rut.util.algorithm.support.InsertSort; `K~300-hOb
import org.rut.util.algorithm.support.MergeSort; ;->(hFJt
import org.rut.util.algorithm.support.QuickSort; 5sEq`P}5
import org.rut.util.algorithm.support.SelectionSort; %gJf&A
import org.rut.util.algorithm.support.ShellSort; zm9>"(H
GTNN4
/** nv*q N\i'
* @author treeroot QW|,_u5j
* @since 2006-2-2 vEvVT]g[V
* @version 1.0 l^%Ez?-:s
*/ &2Q4{i
public class SortUtil { tV9nC
public final static int INSERT = 1; 55Y BO$
public final static int BUBBLE = 2; g,7`emOX
public final static int SELECTION = 3; ?^Q!=W<7
public final static int SHELL = 4; |jk"; h
public final static int QUICK = 5; yK_$6EtNKj
public final static int IMPROVED_QUICK = 6; Nqk*3Q"f
public final static int MERGE = 7; -k|r#^(G2
public final static int IMPROVED_MERGE = 8; lSUEE0V%Q
public final static int HEAP = 9; Jp!Q2}
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public static void sort(int[] data) { PiMh] 0
sort(data, IMPROVED_QUICK); #Fl"#g$
} H@qA X
private static String[] name={ sikG}p0mx<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =m:xf&r#
}; B5~S&HQ?B6
0ym>Hbax)
private static Sort[] impl=new Sort[]{ B4r4PSB>!
new InsertSort(), .v9#|d d+
new BubbleSort(), >93vMk~hU
new SelectionSort(), /w^}(IJ4
new ShellSort(), [,3o
new QuickSort(), PzWhB* iBR
new ImprovedQuickSort(), (g`G(K_
new MergeSort(), 0hnN>?
new ImprovedMergeSort(), !=3[Bm G
new HeapSort() !<Ma9%uC{
}; 2)Grl;T]s
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public static String toString(int algorithm){ U ]`SM6
return name[algorithm-1]; eqb8W5h'
} (y[+s?;WyB
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public static void sort(int[] data, int algorithm) { MxD,xpf
impl[algorithm-1].sort(data); @Z&El:]3>
} 7;jwKA;k
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public static interface Sort { `|Pfa
public void sort(int[] data); 5f(yF
} n#Q;bSw
--4,6va`e
public static void swap(int[] data, int i, int j) { 3s<~}&"
int temp = data; zt/b S/
data = data[j]; ?'Y\5n/*$
data[j] = temp; W,9. z%
} vxhs1vh
} 26.),a