[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; s5@BVD'}E
} M +OVqTsFU
int i1=l; uQW)pD{_
int i2=mid+1; .:j{d}p}
for(int cur=l;cur<=r;cur++){ FAnz0p+t
if(i1==mid+1) Bo"9;F
data[cur]=temp[i2++]; 5<(* +mP`
else if(i2>r) w PR Ns9^
data[cur]=temp[i1++]; LLTr+@lj
else if(temp[i1] data[cur]=temp[i1++]; bPFGQlmIO
else B9"o Ru^}
data[cur]=temp[i2++]; Y5GN7.
} @o0HDS
} ejV`W7U
YdCl
} MM32\}Y6
M$EF 8
改进后的归并排序: UmVn:a
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package org.rut.util.algorithm.support; "QOQ
g4WmUV#wp
import org.rut.util.algorithm.SortUtil; vb~%u;zrC@
;&j'`tP
/** >k"O3Pc@
* @author treeroot SdlO]y9E
* @since 2006-2-2 O<s7VHj
* @version 1.0 .\a+m
*/ |^8ND#x
public class ImprovedMergeSort implements SortUtil.Sort { 55O}SUs!P
En&7e
private static final int THRESHOLD = 10; Hi[lN7ma8
q<E7qY+
/* K7&]|^M9
* (non-Javadoc) HHx:s2G
* z#Jw?K_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l5w^rj
*/ |2^mCL.r
public void sort(int[] data) { oqwW
int[] temp=new int[data.length]; VDnrm*
mergeSort(data,temp,0,data.length-1); w~B1TfqNo
} ?/&X_O
p_Xfj2E4c
private void mergeSort(int[] data, int[] temp, int l, int r) { wBpt W2jA
int i, j, k; : _Y^o
int mid = (l + r) / 2; \/1~5mQ+
if (l == r) 2tK~]0x
return; l^R:W#*+U
if ((mid - l) >= THRESHOLD) $CB&>?~
mergeSort(data, temp, l, mid); -J63'bb7oi
else 'n7|fjX?Y
insertSort(data, l, mid - l + 1); BPkMw'a:
if ((r - mid) > THRESHOLD) s&ox%L4
mergeSort(data, temp, mid + 1, r); &G%AQpDW5
else i}LQ}35@
insertSort(data, mid + 1, r - mid); qE2<vjRg
&k)+]r
for (i = l; i <= mid; i++) { 3)VO{Cj!
temp = data; -aJ(-Np$f
} 49E| f ^q
for (j = 1; j <= r - mid; j++) { {@KLN<
temp[r - j + 1] = data[j + mid]; G:b6Wf
} x%X3FbF]
int a = temp[l]; &H# l*
int b = temp[r]; ~W>{Dd(J_
for (i = l, j = r, k = l; k <= r; k++) { ~*EipxhstJ
if (a < b) { yzfiH4
data[k] = temp[i++]; %u%;L+0Q[
a = temp; ypM,i
} else { 6T4"m
data[k] = temp[j--]; 'dwsm7Xd
b = temp[j]; ; ]%fFcy
} 9*iVv)jd
} 1N _"Mm{
} [uqr
}%wP^6G*x\
/** 0*:n<T9
* @param data tz65Tn_M
* @param l #p=+RTZ<
* @param i %+/v")8+?
*/ 1<x5{/CZ
private void insertSort(int[] data, int start, int len) { e#5WX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j\KOKvY)
} CPa+?__B
} KUX6n(u
} ,?U(PEO\f
} q:up8-LAr
!pe[H*Cy
堆排序： VKXi*F9
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package org.rut.util.algorithm.support; r8R7@S2V'
n)cc\JPQ
import org.rut.util.algorithm.SortUtil; UV%o&tv|<
b^[>\s'
/** :F5(]g 7
* @author treeroot 6R m dt
* @since 2006-2-2 fC^d@4ha
* @version 1.0 ajRht+{
*/ Q>yj<DR
public class HeapSort implements SortUtil.Sort{ m?Jnb\0
xg%{p``
/* (non-Javadoc) B7A.~'=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :zC=JvKT
*/ MeV4s%*O+
public void sort(int[] data) { i{:?Iw 'ay
MaxHeap h=new MaxHeap(); ^38kxwh
h.init(data); 9&kY>M>z0
for(int i=0;i h.remove(); :1'1n
System.arraycopy(h.queue,1,data,0,data.length); n>^9+Rx|i
} 78T;b7!-C
zGO_S\
private static class MaxHeap{ ;,/G*`81B
5-a^Frmg#"
void init(int[] data){ mMZ=9 ?m
this.queue=new int[data.length+1]; WZA1nzRc
for(int i=0;i queue[++size]=data; +7"UF) ~k
fixUp(size); T8LvdzS
} kVWrZ>McK
} '#K~hep
ZnbpIJ8cV
private int size=0; JKYtBXOl
M9Z9s11{H
private int[] queue; pOy(XUV9O
|<]wM(GxE
public int get() { |a1zJ_t4
return queue[1]; UGOe(JB
} 4`CO>Q
M(^IRI-
public void remove() { qsN}KgTjg
SortUtil.swap(queue,1,size--); $43CNnf3N
fixDown(1); y}QqS/
} M;-FW5O't
file://fixdown Oa5-^&I
private void fixDown(int k) { B 4e}%
int j; /KiaLS
while ((j = k << 1) <= size) { +ZwTi!W
if (j < size %26amp;%26amp; queue[j] j++; UA0R)BH'
if (queue[k]>queue[j]) file://不用交换 Dxr4B<
break; q<g!bW%
SortUtil.swap(queue,j,k); 1{xkAy0
k = j; %&O'>L
} _=5\$6
} ,E(M<n|.
private void fixUp(int k) { wGz_IL.D
while (k > 1) { w@N)Pu
int j = k >> 1; F0'o!A#|(
if (queue[j]>queue[k]) 6>d3*
break; [di&N!Ao
SortUtil.swap(queue,j,k); ]w8h#p
k = j; S@L%X<Vm
} IgF#f%|Q
} >vfLlYx
|Pse=_i
} ijNI6_eU
A.P*@}9
} d/?0xLW
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SortUtil： H#`&!p
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package org.rut.util.algorithm; \y/0)NL\
U%2{PbL
import org.rut.util.algorithm.support.BubbleSort; xl,?Hh%#
import org.rut.util.algorithm.support.HeapSort; 1$c[G}h
import org.rut.util.algorithm.support.ImprovedMergeSort; i\L7z)u
import org.rut.util.algorithm.support.ImprovedQuickSort; G>^ _&(c@2
import org.rut.util.algorithm.support.InsertSort; 1UH_"Q03
import org.rut.util.algorithm.support.MergeSort; R<>uCF0
import org.rut.util.algorithm.support.QuickSort; YH[HJ#:7r
import org.rut.util.algorithm.support.SelectionSort; PurY_
import org.rut.util.algorithm.support.ShellSort; cmLI!"RLe
H%Sx*|
/** TP/bPZY
* @author treeroot YP}r15P
* @since 2006-2-2 =~j S
* @version 1.0 Bv=:F5hLG
*/ *5'l"YQ@1
public class SortUtil { Su`] ku'
public final static int INSERT = 1; Fc"+L+h@W
public final static int BUBBLE = 2; <C7/b#4>\
public final static int SELECTION = 3; m3b?f B
public final static int SHELL = 4; 1b"3]?
public final static int QUICK = 5; }l@7t&T|
public final static int IMPROVED_QUICK = 6; Q"{Q]IT
public final static int MERGE = 7; V_Y2@4
public final static int IMPROVED_MERGE = 8; MW.,}f
public final static int HEAP = 9; !L'O")!3
U| 1&=8l
public static void sort(int[] data) { )RwO2H
sort(data, IMPROVED_QUICK); -+.-Ab7
} hrnY0
private static String[] name={ V^p XbDRl
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q/\Hh9`
}; \E:l E/y
2W`<P2IA
private static Sort[] impl=new Sort[]{ {&Sr<d5
new InsertSort(), 8J#TP7;
new BubbleSort(), HFf9^
new SelectionSort(), LfS]m>>e
new ShellSort(), )pt#Pu
new QuickSort(), NY~y:*:Q
new ImprovedQuickSort(), "/U~j4O
new MergeSort(), ,`l8KRd
new ImprovedMergeSort(), _;5N@2?
new HeapSort() V}"w8i+D?
}; >!2d77I
N u9+b"Wr
public static String toString(int algorithm){ 7tz#R:
return name[algorithm-1]; _S#3!Wx
} &l1CE19<
umj5M5oe3
public static void sort(int[] data, int algorithm) { +QVe -
impl[algorithm-1].sort(data); fxk6q$'
} DC%H(2
+aIy':P
public static interface Sort { C")NNs=
public void sort(int[] data); yE),GJ-m\<
} Q"an6ht|
l7=WO#Pb
public static void swap(int[] data, int i, int j) { 5oIgxy
int temp = data; HvVS<Ke
data = data[j]; @8GW?R
data[j] = temp; 'uA$$~1
} mq~L1<f
} *6%r2l'kZ