[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; koojF|H>
} cjp~I/U
int i1=l; jct|}U
int i2=mid+1; 6 h%,%
for(int cur=l;cur<=r;cur++){ elGwS\sw
if(i1==mid+1) s-801JpiJ
data[cur]=temp[i2++]; (V x2*Aw]
else if(i2>r) Gk']Ma2J}
data[cur]=temp[i1++]; yz<$?Gblz
else if(temp[i1] data[cur]=temp[i1++]; 5AbY 59
else XW.k%H4@
data[cur]=temp[i2++]; ^M)+2@6
} ' ~1/*F%8
} AM0CIRX$
TE9Iyl|=
} (M2hK[
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改进后的归并排序: ^o87qr0g]
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package org.rut.util.algorithm.support; Ye|(5f
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import org.rut.util.algorithm.SortUtil; eiQ42x@Z
E?0Vo%Vh
/** Vq599M:)V
* @author treeroot l* z"wA-
* @since 2006-2-2 nR=!S5>S
* @version 1.0 USg,=YM
*/ &. MUSqo9
public class ImprovedMergeSort implements SortUtil.Sort { \1O wZ@
t"Bp# U1
private static final int THRESHOLD = 10; #p<(2wN
SyI\ulmL
/* jmG)p|6
* (non-Javadoc) }` YtXD-o
* R; ui 4wg6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7~~suQ{F4
*/ }X6w"
public void sort(int[] data) { ]$BC f4:
int[] temp=new int[data.length]; "/ySHB[
mergeSort(data,temp,0,data.length-1); Pm]lr|Q{I
} & }7+.^
>K<cc#Aa
private void mergeSort(int[] data, int[] temp, int l, int r) { B7wzF"
int i, j, k; 29^(weT"]
int mid = (l + r) / 2; e'sS",o*
if (l == r) ?kK3%uJy&
return; {9FL}Jrt
if ((mid - l) >= THRESHOLD) #w@FBFr@
mergeSort(data, temp, l, mid); |\Q2L;4C
else {PkR6.XhR
insertSort(data, l, mid - l + 1); n?>|2>
if ((r - mid) > THRESHOLD) qu\U^F
mergeSort(data, temp, mid + 1, r); -,+~W#n
else &;bey4_J
insertSort(data, mid + 1, r - mid); :Q,~Nw>
HV'M31m~q
for (i = l; i <= mid; i++) { ::_bEmk
temp = data; 2tg07
} d)3jkHYEjj
for (j = 1; j <= r - mid; j++) { di(H-=9G62
temp[r - j + 1] = data[j + mid]; xSqr=^
} +,g!xv4Q
int a = temp[l]; uzI-1@`
int b = temp[r]; b%KcS&-6
for (i = l, j = r, k = l; k <= r; k++) { vw$b]MO!
if (a < b) { .mNw^>:cq
data[k] = temp[i++]; wwet90_g
a = temp; |S~$IFN4
} else { P @J)S ?
data[k] = temp[j--]; ;Ea8>
b = temp[j]; N{}8Zh4op
} V(XZ7<& {
} *8+HQ[[#
} ~Q#!oh'i
#?`S+YN!q)
/** #k1IrqUp
* @param data ~N/a\%`
* @param l R)4,f~@"
* @param i #C'E'g0
*/ pN_%>v"o
private void insertSort(int[] data, int start, int len) { sIbPMu`&U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Wsp c;]&
} +6}CNC9Mp
} Q"uK6ANp'
} L7nG5i
} '@ p464
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堆排序： "Bwmq9Jq
15En$6>
package org.rut.util.algorithm.support; Q^=0p0
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import org.rut.util.algorithm.SortUtil; 6tjV^sjs
}#;.b'`
/** K<r5jb
* @author treeroot p] N/]2rR
* @since 2006-2-2 @h_ bXo
* @version 1.0 ,`OQAJ)>
*/ 4;>HBCM4-
public class HeapSort implements SortUtil.Sort{ -E3cS
s|:1z"q
/* (non-Javadoc) uL@%M8n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DF>tQ
*/ 9ZG:2ncdJ
public void sort(int[] data) { lFduX D
MaxHeap h=new MaxHeap(); xX9snSGz
h.init(data); dz>Jl},`k
for(int i=0;i h.remove(); X 5X D1[
System.arraycopy(h.queue,1,data,0,data.length); H:9G/Nev
} S{v]B_N[M
RnU7|p{
private static class MaxHeap{ p@Cas
KT*>OYI
void init(int[] data){ eE=2~ ylU
this.queue=new int[data.length+1]; eMdf[eS
for(int i=0;i queue[++size]=data; (2QfH$HEk
fixUp(size); .)Pul|)d
} QSn18V>{
} @HSK[[?
Vp0_R9oQ
private int size=0; ^nNpT!o
`m8WLj
private int[] queue; !f&hVLs0
_ WPt zL
public int get() { z]C=nXbk
return queue[1]; '-J<ib t
} '?Q"[e
I}5e{jBB
public void remove() { <5 OUk
SortUtil.swap(queue,1,size--); D`mr>-Y
fixDown(1); /3tErc'
} C^;8M'8z0
file://fixdown Iz-mUD0;
private void fixDown(int k) { 2K o]Q_,~
int j; fH?A.JP=a
while ((j = k << 1) <= size) { -:"KFc8A
if (j < size %26amp;%26amp; queue[j] j++; 4\p%|G^hU
if (queue[k]>queue[j]) file://不用交换 8O(L;&h
break; q86}'dFw{
SortUtil.swap(queue,j,k); :ir3u
k = j; *)`PY4zF
} 5GgH6
} rFkZ'rp74b
private void fixUp(int k) { L6i|5 P
while (k > 1) { S:`Gi>D
int j = k >> 1; |HYST`
if (queue[j]>queue[k]) %G,7Ul1f
break; ]];pWlo!
SortUtil.swap(queue,j,k); -K(d]-yv
k = j; H_t0$x(\
} vr{|ubG]d
} $w <R".4
-y|']I^ &
} jAue+tB
)!cucY
} x3#:C=
p~=z)7%e'
SortUtil： ov H'_'
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package org.rut.util.algorithm; mCk_c
@ <2y+_e
import org.rut.util.algorithm.support.BubbleSort; rPyjr(I"_
import org.rut.util.algorithm.support.HeapSort; iM;Btv[|
import org.rut.util.algorithm.support.ImprovedMergeSort; V_D wHq2
import org.rut.util.algorithm.support.ImprovedQuickSort; DTM(SN8R+n
import org.rut.util.algorithm.support.InsertSort; Lk@+iHf
import org.rut.util.algorithm.support.MergeSort; frW\!r{LT
import org.rut.util.algorithm.support.QuickSort; M*D_pn&
import org.rut.util.algorithm.support.SelectionSort; Tp{jR<
import org.rut.util.algorithm.support.ShellSort; im9EV|;
&"gX 7cK8
/** U<=d@knH
* @author treeroot w+)wrJTtm
* @since 2006-2-2 Mp!1xx
* @version 1.0 aXQAm$/ >
*/ '0)`.
public class SortUtil { 3)LS#=
public final static int INSERT = 1; a9.255
public final static int BUBBLE = 2; XOQ0(e6
public final static int SELECTION = 3; f(eXny@Y
public final static int SHELL = 4; ';8 ,RTe
public final static int QUICK = 5; ;S$
public final static int IMPROVED_QUICK = 6; L;?F^RK{U
public final static int MERGE = 7; cJ@fJ|
public final static int IMPROVED_MERGE = 8; T,uF^%$@AQ
public final static int HEAP = 9; m9sck:g#L1
9a`~ K L
public static void sort(int[] data) { #W|Obc]K
sort(data, IMPROVED_QUICK); n3&h1-
} u9~Ncz
private static String[] name={ =_iYT044p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" EA1&D^nT
}; 4|I;z
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private static Sort[] impl=new Sort[]{ &v1E)/q{Z
new InsertSort(), }`H{;A h
new BubbleSort(), NS`hXf
new SelectionSort(), ^E\n^D-RV
new ShellSort(), }vOg9/[{
new QuickSort(), N%Y!{k5T7
new ImprovedQuickSort(), ohyq/u+y~A
new MergeSort(), pO5j-d*
new ImprovedMergeSort(), S^|`*%pq
new HeapSort() 0-{E% k
}; islHtX VE
\o2l;1~
public static String toString(int algorithm){ I+.U.e^gx
return name[algorithm-1]; LEtGrA/%@b
} ~,KrL(jC
%3TioM[B
public static void sort(int[] data, int algorithm) { tWzBQx
impl[algorithm-1].sort(data); $uFvZ?w&
} V_m!<sr(
i<>%y*+@
public static interface Sort { F:#5Edo}A
public void sort(int[] data); I~YV&12
} }1[s,
+aM[!pW(e
public static void swap(int[] data, int i, int j) { 7BwR ].
int temp = data; Pw]r&)I`y[
data = data[j]; nsXG@CS:
data[j] = temp; z)v o
} {{_v.d~1
} cfv:Ld m