[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; m+[Ux{$
} VscE^'+
int i1=l; zR:L!S
int i2=mid+1; F@KGj|
for(int cur=l;cur<=r;cur++){ &K#M*B,*p
if(i1==mid+1) ""G'rN_=Bi
data[cur]=temp[i2++]; .uZ3odMlx
else if(i2>r) oJz^|dW
data[cur]=temp[i1++]; \!ZTL1b8t
else if(temp[i1] data[cur]=temp[i1++]; +~$ ]}%
else ;A'mB6?%H
data[cur]=temp[i2++]; `*R:gE=
} Ee! 4xg
} {%H'z$|{
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} Xc-'Y"}|`t
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改进后的归并排序: A?P_DA
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package org.rut.util.algorithm.support; IOmfF[
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import org.rut.util.algorithm.SortUtil; +I|vzz`ZVr
KkbDW3-
/** 7Ovi{xd@
* @author treeroot ^jZbo{
* @since 2006-2-2 Ow,w$0(D
* @version 1.0 [RhO$c$[\
*/ ea 'D td
public class ImprovedMergeSort implements SortUtil.Sort { ^}o2
",; H`V
private static final int THRESHOLD = 10; ~B?y{
8cIKvHx
/* Ve; n}mJ?
* (non-Javadoc) / zPO
* @qAS*3j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;?p>e'
*/ V**~m9f
public void sort(int[] data) { VU3upy<
int[] temp=new int[data.length]; $<EM+oJ|ER
mergeSort(data,temp,0,data.length-1); p_%Rt"!
} 8(~h"]`!
d\8l`Krs[_
private void mergeSort(int[] data, int[] temp, int l, int r) { BQMpHSJ_
int i, j, k; n{mfn*r.
int mid = (l + r) / 2; <>rneHl8
if (l == r) HIZe0%WPw
return; hz@bW2S.
if ((mid - l) >= THRESHOLD) E ~<JC"]
mergeSort(data, temp, l, mid); ](8[}CeL
else '5$b-x6F
insertSort(data, l, mid - l + 1); >|UOz&
if ((r - mid) > THRESHOLD) j A%u 5V
mergeSort(data, temp, mid + 1, r); /*mI<[xb
else /h3RmUy
insertSort(data, mid + 1, r - mid); h S&R(m
+cN8Y}V
for (i = l; i <= mid; i++) { .aQ \jA
temp = data; (O3nL.
} 2P0*NQ
for (j = 1; j <= r - mid; j++) { F={a;Dvrn
temp[r - j + 1] = data[j + mid]; UP,c|
} %7+qnH*;r
int a = temp[l]; zK@@p+n_#.
int b = temp[r]; HG^'I+Yn
for (i = l, j = r, k = l; k <= r; k++) { &Z%?!.4j@
if (a < b) { jNk%OrP]
data[k] = temp[i++]; l]8uk^E
a = temp; VMWf>ZU
} else { pW3^X=6
data[k] = temp[j--]; 6j}9V L77
b = temp[j]; 4,DeHJjAlE
} Y$@?.)tY
} Lp9E:D->
} UJ
&F~T-i>X
/** vEJbA
* @param data Q*Pq{]0K
* @param l H/M@t\$Dc
* @param i cbTm'}R(G
*/ PdWx|y{%
private void insertSort(int[] data, int start, int len) { 5=ryDrx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6=Otq=WH
} _oeS Uzq.
} oUlVI*~ND
} ujpJ@OWj
} 3^yK!-Wp(
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堆排序： xJ.M;SF4
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package org.rut.util.algorithm.support; IH+|}z4N?>
UkFC~17P
import org.rut.util.algorithm.SortUtil; Z,PPu&lmE/
=rdV ]{Wc
/** tKXIk9e
* @author treeroot *s3/!K
* @since 2006-2-2 7@W>E;go
* @version 1.0 X"eYK/7
*/ l.M0`Cn-%
public class HeapSort implements SortUtil.Sort{ EfT=?
dSHDWu&
/* (non-Javadoc) AA>P`C$&M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2D5StCF$O
*/ La[V$+Y
public void sort(int[] data) { [Y`W
MaxHeap h=new MaxHeap(); ]7A'7p$Y
h.init(data); !j-Z Lq:;
for(int i=0;i h.remove(); G 01ON0
System.arraycopy(h.queue,1,data,0,data.length); A,!-{/wc
} &$H!@@09|w
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private static class MaxHeap{ J#83 0r(-
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void init(int[] data){ [dz _R
this.queue=new int[data.length+1]; B%68\
for(int i=0;i queue[++size]=data; I7]8Y=xf
fixUp(size); m9;SrCN_
} v`T c}c '
} qf-8<{T
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private int size=0; -mh3DhJ,
'V>-QD%1
private int[] queue; M"L=L5OH-
}x,S%M-
public int get() { apn*,7ps65
return queue[1]; 1|:KQl2q
} UPGtj"2v-
s5.CFA
public void remove() { *0ro0Z|Iq
SortUtil.swap(queue,1,size--); 6!bsM"F
fixDown(1); Q,Eo mt
} |w3M7;~eF
file://fixdown gRzxLf`K
private void fixDown(int k) { 19#\+LWA
int j; D2O~kNd
while ((j = k << 1) <= size) { 3OB"#Ap8<
if (j < size %26amp;%26amp; queue[j] j++; #\ErY3k6&
if (queue[k]>queue[j]) file://不用交换 @2#lI
break; s>c=c-SP.
SortUtil.swap(queue,j,k); k}rbim
k = j; }6ldjCT/,
} Vjpy~iP4B
} n=q76W\
private void fixUp(int k) { 7xR\kL.,
while (k > 1) { G#$-1"!`
int j = k >> 1; _yT Ed"$
if (queue[j]>queue[k]) '5tCz9}Y
break; ?V=CB,^
SortUtil.swap(queue,j,k); Iu6
k = j; W%w~ah|/]
} 0*v2y*2V
} Gq P5Kx+=
$:^td/p J
} ,#K'PB4E
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} 19] E 5'AI
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SortUtil： |':{lH6+1
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package org.rut.util.algorithm; HVAYPerH
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import org.rut.util.algorithm.support.BubbleSort; GA.8@3
import org.rut.util.algorithm.support.HeapSort; z(~_AN M4,
import org.rut.util.algorithm.support.ImprovedMergeSort; u1.BN>G
import org.rut.util.algorithm.support.ImprovedQuickSort; ~>XxGjxe
import org.rut.util.algorithm.support.InsertSort; eJX#@`K
import org.rut.util.algorithm.support.MergeSort; !'O@2{?B
import org.rut.util.algorithm.support.QuickSort; VtohL+
import org.rut.util.algorithm.support.SelectionSort; 1E$|~
import org.rut.util.algorithm.support.ShellSort; wgA_38To
y)<q/
/** to&m4+5?6
* @author treeroot [-x7_=E#
* @since 2006-2-2 5IG-~jzCLb
* @version 1.0 (V@HR9?W)
*/ 4&iCht =
public class SortUtil { vKR[&K{Z|
public final static int INSERT = 1; y_[vr:s5pG
public final static int BUBBLE = 2; ")25 qZae
public final static int SELECTION = 3; S|}L&A
public final static int SHELL = 4; AOx[
public final static int QUICK = 5; S8gs-gL#Og
public final static int IMPROVED_QUICK = 6; d d;T-wa}
public final static int MERGE = 7; @j/&m]6%-D
public final static int IMPROVED_MERGE = 8; *lb<$E]="!
public final static int HEAP = 9; Q59W#e)
D&zle~" J
public static void sort(int[] data) { {xB3S_,8
sort(data, IMPROVED_QUICK); UCWBYC+
} Ir]\|t
private static String[] name={ zW nR6*\
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?h2}#wg
}; 8;X-)&R
y+q5UC|
private static Sort[] impl=new Sort[]{ WEpoBP CL
new InsertSort(), bPMhfK2 %
new BubbleSort(), wyG;8I
new SelectionSort(), yDS4h(^
new ShellSort(), [/ZO q
new QuickSort(), :hA#m[
new ImprovedQuickSort(), ~)'k 9?0
new MergeSort(), rM"l@3hP
new ImprovedMergeSort(), c[e}w+uB
new HeapSort() Ap !lQ>p
}; w*Ihk)
{>;R?TG]$
public static String toString(int algorithm){ L0]_X#s>#
return name[algorithm-1]; eQ}4;^;M-
} <-0]i_4sK
azU"G(6y?+
public static void sort(int[] data, int algorithm) { rLT!To
impl[algorithm-1].sort(data); ?%kV?eu'
} |7Kbpj
S[QrS7
public static interface Sort { I2DpRMy
public void sort(int[] data); J8~haim
} 9>$p
$ulOp;~A%
public static void swap(int[] data, int i, int j) { L=h'Qgk%
int temp = data; ,[;G|et
data = data[j]; H']+L~j
data[j] = temp; :H[6Lg\*
} G/ 5%.Bf@
} ^}C\zW