[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; ~E`A,
} )5V1HWjU
int i1=l; $S cjEG:6
int i2=mid+1; )d1,}o
for(int cur=l;cur<=r;cur++){ Vgm{=$
if(i1==mid+1) I2l'y8)d
data[cur]=temp[i2++]; bFx?HM.AGW
else if(i2>r) KJkcmF}Q
data[cur]=temp[i1++]; y! 1NS
else if(temp[i1] data[cur]=temp[i1++]; `") I[h
else I5"=b}V5
data[cur]=temp[i2++]; XAFTLNV>
} D 7E^;W)H
} BR%:`uiQ<
fu&]t8MJC
} bU,&|K/
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改进后的归并排序: 3a S>U #
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package org.rut.util.algorithm.support; ";. 3+z
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import org.rut.util.algorithm.SortUtil; t-Fl"@s
z'I0UB#
/** MdfkC6P
* @author treeroot U5PCj ]-Xt
* @since 2006-2-2 v>P){VT
* @version 1.0 Y+7v~/K=
*/ 0nd<6S+fs
public class ImprovedMergeSort implements SortUtil.Sort { cK } Qu
t8[:}[Jx
private static final int THRESHOLD = 10; 0&-sz=L
2gv(`NKYE
/* Q&LkST-i
* (non-Javadoc) 8|/YxF<
* J{ Vl2P?@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uQNoIy J)
*/ wDG4rN9x
public void sort(int[] data) { YD%Kd&es
int[] temp=new int[data.length]; RPWYm
mergeSort(data,temp,0,data.length-1); KP(Bu0S
} }1P
&Hqu`A/^
private void mergeSort(int[] data, int[] temp, int l, int r) { G~Sfpf
int i, j, k; "8I4]'
int mid = (l + r) / 2; kShniN
if (l == r) Kna'5L5"
return; ;sf/tX
if ((mid - l) >= THRESHOLD) VGq]id{*$
mergeSort(data, temp, l, mid); 2P}RZvUd
else V_kE"W)
insertSort(data, l, mid - l + 1); '9gI=/29D
if ((r - mid) > THRESHOLD) >A/=eW/q
mergeSort(data, temp, mid + 1, r); KPhqD5, (
else *GhRU5
insertSort(data, mid + 1, r - mid); BTyVfq sx
loJ0PY'}=
for (i = l; i <= mid; i++) { wGH@I_cy>
temp = data; DPOPRi~
} Ah`dt8t
for (j = 1; j <= r - mid; j++) { 4@I]PG
temp[r - j + 1] = data[j + mid]; u/f&Wq/
} a6d KQ3D
int a = temp[l]; I'C,'
int b = temp[r]; :Eyv==
for (i = l, j = r, k = l; k <= r; k++) { 5,Y2Lzr
if (a < b) { K;PpS*!
data[k] = temp[i++]; di5_5_$`o
a = temp; A@OV!DJe]
} else { 1c!},O
data[k] = temp[j--]; ~}*;Ko\
b = temp[j]; 0Pk-FSY|f
} Izu.I_$4
} `^kST><
} ?r<F\rBT7*
%"zJsYQ!
/** Biwdb
* @param data Fe.*O`
* @param l P+0xi
* @param i [4j;FN Fa
*/ v3Yj2LSqx
private void insertSort(int[] data, int start, int len) { bB-v ar
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9_3M}|V$^e
} &?6w2[}
} \tx/!tA
} eZi<C}z
} $@)d9u cd
HV.7IyBA^
堆排序： X;:xGZ-oY
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package org.rut.util.algorithm.support; ex458^N_
]o$/xP
import org.rut.util.algorithm.SortUtil; rUjr'O0
Pa +BE[z
/** ,m,vo_Ub
* @author treeroot (xed(uFEK
* @since 2006-2-2 +.I'U9QeUN
* @version 1.0 $4L3y uH
*/ 2\de|'
public class HeapSort implements SortUtil.Sort{ ~*Qpv&y)
m9@n
/* (non-Javadoc) 17oxD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ($>0&w
*/ ;7k7/f:
public void sort(int[] data) { >>zoG3H!
MaxHeap h=new MaxHeap(); /g''-yT7#
h.init(data); ASw|sw
for(int i=0;i h.remove(); ':]a.yA\1
System.arraycopy(h.queue,1,data,0,data.length); N-E`go
} S45>f(!
5i#w:O\cz
private static class MaxHeap{ ^^l"brPa
|81N/]EER
void init(int[] data){ 6~WE#z_
this.queue=new int[data.length+1]; o q)"1
for(int i=0;i queue[++size]=data; d A{Jk
fixUp(size); |"w<CKlQ
} C/Bx_j((
} /8\&f%E
+Uq:sfj,
private int size=0; 1C=P#MU`
FSs$ ] d;
private int[] queue; $:II@=
#9VY[<
public int get() { #/<Y!qV&
return queue[1]; 4 GW[GT
} g}QTZT8
1iL xXd
public void remove() { }F6b ]
SortUtil.swap(queue,1,size--); G| oG:
fixDown(1); }tO<_f))
} G!%XQ\a!
file://fixdown C/XyDbH
private void fixDown(int k) { l>Ja[`X@
int j; y4rJ-
while ((j = k << 1) <= size) { Z3>3&|&
if (j < size %26amp;%26amp; queue[j] j++; _)2TLA n3
if (queue[k]>queue[j]) file://不用交换 XYF~Q9~
break; VQMd[/
SortUtil.swap(queue,j,k); |o=ST
k = j; t`t:qko
} 5XO'OSdYq
} eAKQR
private void fixUp(int k) { BV?N_/DXp
while (k > 1) { e7qMt[.
int j = k >> 1; M;V#Gm
if (queue[j]>queue[k]) s^'#"`!v=
break; F6]!?@
SortUtil.swap(queue,j,k); 4~YQ\4h=
k = j; t0d '>
} {}&f\6OI%
} Z;SG<
R${4Q1
} lY9M<8g
N%|Vzc
} xh^ZI6L<
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SortUtil： _XNR um4
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package org.rut.util.algorithm; 7C7(bg,7^
/ !
import org.rut.util.algorithm.support.BubbleSort; o+Ti$`2<O7
import org.rut.util.algorithm.support.HeapSort; ur,"K'w
import org.rut.util.algorithm.support.ImprovedMergeSort; bTy)0ta>AF
import org.rut.util.algorithm.support.ImprovedQuickSort; <;0N@
import org.rut.util.algorithm.support.InsertSort; A6y~_dt
import org.rut.util.algorithm.support.MergeSort; Hs-.83V
import org.rut.util.algorithm.support.QuickSort; _QUu'zJ
import org.rut.util.algorithm.support.SelectionSort; \If!5N
import org.rut.util.algorithm.support.ShellSort; &\lS
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/** jsi#l
* @author treeroot c$<O0dI
* @since 2006-2-2 7cP[o+
* @version 1.0 vJAAAS
*/ G[<[#$(
public class SortUtil { [Ro0eH
public final static int INSERT = 1; /Q>{YsRRB
public final static int BUBBLE = 2; 3/IWO4?_
public final static int SELECTION = 3; <bXWkj
public final static int SHELL = 4; S]%U]
public final static int QUICK = 5; Dw/Gha/
public final static int IMPROVED_QUICK = 6; \R>5F\ 0
public final static int MERGE = 7; xnuv4Z}]t
public final static int IMPROVED_MERGE = 8; mc=!X
public final static int HEAP = 9; .Jat^iFj0
Q()RO*9
public static void sort(int[] data) { -1r&s
sort(data, IMPROVED_QUICK); ji)4WG/1
} d7tD|[(J
private static String[] name={ SAE'?_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cvXI]+`<3\
}; .6 ?>t!&W
} .H Fm'p
private static Sort[] impl=new Sort[]{ &J/4J
new InsertSort(), G9y12HV
new BubbleSort(), dMs39j
new SelectionSort(), {F6dSF`
new ShellSort(), :n>ccZeMv
new QuickSort(), *[1u[H9Cv
new ImprovedQuickSort(), +=*m! 7Mr
new MergeSort(), &;h~JS=
new ImprovedMergeSort(), 6:@t=C
new HeapSort() e(;`9T
}; 'UvS3]bSYW
@wdB%
public static String toString(int algorithm){ qzlMn)e
return name[algorithm-1]; zhX`~){N6
} HMS9y%zl/
Z(k\J|&9C
public static void sort(int[] data, int algorithm) { jle%|8m&@
impl[algorithm-1].sort(data); ci_v7Jnwo
} Bpm5dT;
Xlqz8cI
public static interface Sort { T^%n!t
public void sort(int[] data); FH`'1iVH
} o&XMgY~
w^'?4M!
public static void swap(int[] data, int i, int j) { .xLF}{u
int temp = data; ,8xP8T~Kmv
data = data[j]; SC $`
data[j] = temp; DYT -#Ht
} aa0`y
} o,Tr^e$