[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; *ys@'Ai?
} NZe3 m
int i1=l; xB68RQe)
int i2=mid+1; !3DWz6u
for(int cur=l;cur<=r;cur++){ U;?%rM6
if(i1==mid+1) qDqIy+WR
data[cur]=temp[i2++]; b+'G^!JR
else if(i2>r) +e)So+.W
data[cur]=temp[i1++]; qlIC{:E0
else if(temp[i1] data[cur]=temp[i1++]; G&0&*mp
else U)zd~ug?m
data[cur]=temp[i2++]; Yi{[llru
} 7,!Mmu
} 9;&2LT7z
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} f?dNTfQ3mi
":"QsS#*"#
改进后的归并排序: 'AF2:T\
#~Lh#@h
package org.rut.util.algorithm.support; MfJk`-%~
nR6~oB{-
import org.rut.util.algorithm.SortUtil; .i"v([eQ
r%xp^j}
/** h76#HUBr!
* @author treeroot f/Grem
* @since 2006-2-2 NO +j
* @version 1.0 Fh?;,Z
*/ $e+@9LNK
public class ImprovedMergeSort implements SortUtil.Sort { "}\2zub9
+#6WORH0S
private static final int THRESHOLD = 10; Umm_FEU#]
YZ7rs]A
/* R# 8D}5[&
* (non-Javadoc) r4gkSwy
* H'<9;bD -
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "@gJ[BL#
*/ Fw+JhIVP
public void sort(int[] data) { hAOXOj1
int[] temp=new int[data.length]; +IuV8XT2(
mergeSort(data,temp,0,data.length-1); k!xi (l<C
} vROl}s;
DOkEWqM!
private void mergeSort(int[] data, int[] temp, int l, int r) { uz ` H
int i, j, k; 394u']M
int mid = (l + r) / 2; A~ '2ki5$g
if (l == r) \C ZiU3
return; B+jT|Y'
if ((mid - l) >= THRESHOLD) .!U `,)I
mergeSort(data, temp, l, mid); XU2HWa
else nOkX:5
insertSort(data, l, mid - l + 1); zr&K0a{hc
if ((r - mid) > THRESHOLD) L-Xd3RCD
mergeSort(data, temp, mid + 1, r); Fz?ON1\
else Nk3]<#$
insertSort(data, mid + 1, r - mid); Y">Q16(
Xr:"8FT
for (i = l; i <= mid; i++) { N ]}Re$5
temp = data; X-3L4@T:?
} R=i$*6}a
for (j = 1; j <= r - mid; j++) { "h7Z(Y
temp[r - j + 1] = data[j + mid]; <s9Sx>Zb
} W$EX6jTGI
int a = temp[l]; K *{C:Y
int b = temp[r]; m/0G=%d%k
for (i = l, j = r, k = l; k <= r; k++) { g"2@E
if (a < b) { *Sz`=U7n
data[k] = temp[i++]; <!y_L5S|
a = temp; .W,<]L '
} else { ZZ!d:1'7
data[k] = temp[j--]; 3cT
b = temp[j]; ZA2y
} ppR_y
} r4J4|&ym
} 3 V8SKBS
Uk S86`.
/** pA4/'7nCl
* @param data xE9^4-Px*
* @param l >/6v` 8F
* @param i /{>ds-;-
*/ ,PJl32
private void insertSort(int[] data, int start, int len) { 5irewh'R
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >Eik>dQ a
} HjGT{o
} A7VF >{L./
} ^P"t "
} a+A/l
BR*""/3`
堆排序： eP&K]#
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package org.rut.util.algorithm.support; y|.wL=;
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import org.rut.util.algorithm.SortUtil; XwX1i!'54
E4}MvV=
/** m;KMr6sO
* @author treeroot aFyNm@a
* @since 2006-2-2 *:BNLM
* @version 1.0 49/1#^T"Q>
*/ dXe763~<
public class HeapSort implements SortUtil.Sort{ ~i))Zc3,g\
PA`b~Ct
/* (non-Javadoc) jd]MC*%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "N4c>2Q
*/ xqP0Z),Ow
public void sort(int[] data) { BAzc'x&<
MaxHeap h=new MaxHeap(); Gg5vf]VFo
h.init(data); " 8;D^
for(int i=0;i h.remove(); /Klwh1E
System.arraycopy(h.queue,1,data,0,data.length); js;IUSj.
} lDMYDy{<
i;6\tK"!
private static class MaxHeap{ pRMM1&H
_[0Ugfz(
void init(int[] data){ 9nM {x?
this.queue=new int[data.length+1]; "D3JdyO_S
for(int i=0;i queue[++size]=data; S_ nTp)
fixUp(size); [0/?(i|
} gxU(&
} (>WV)
uKpl+>
private int size=0; 86R}G/>>e
q69a-5q
private int[] queue; pNVao{::5
G<Lm}
public int get() { xs.[]>nQN
return queue[1]; kwWO1=ikz@
} _AVCh)Zb
FuEHO6nx
public void remove() { cTRCQ+W6:
SortUtil.swap(queue,1,size--); pC5-,Z;8
fixDown(1); `q$DNOrS
} f8[2$i*cL
file://fixdown yQou8P=%
private void fixDown(int k) { t9 &O0tpe
int j; }pTw$B
while ((j = k << 1) <= size) { dN\pe@#lKP
if (j < size %26amp;%26amp; queue[j] j++; $PrzJc
if (queue[k]>queue[j]) file://不用交换 '\_ic=&u
break; 2"BlV*\lS
SortUtil.swap(queue,j,k); yv$MQ~]
k = j; Hsp|<;Yg
} $?*+P``
} jLb3{}0
private void fixUp(int k) { >z[d~
while (k > 1) { 2GZUMXK
int j = k >> 1; T,WWQm
if (queue[j]>queue[k]) ?W.Y x7c
break; xl# j_d,
SortUtil.swap(queue,j,k); KVQZ
k = j; I,
} }d6g{`
} QL|Vke:N4
w`!Yr:dU
} ORfA]I-u
ef!I |.FW
} |d{(&s}
ry7(V:ic
SortUtil： Dtr'X@U
.`hlw'20
package org.rut.util.algorithm; c-M&cU+=L
~_S`zzcZy4
import org.rut.util.algorithm.support.BubbleSort; [FC%_R&&
import org.rut.util.algorithm.support.HeapSort; \[,7#
import org.rut.util.algorithm.support.ImprovedMergeSort; oiFtPki
import org.rut.util.algorithm.support.ImprovedQuickSort; n`^</0
import org.rut.util.algorithm.support.InsertSort; 1ViDS
import org.rut.util.algorithm.support.MergeSort; Ef?_d]
import org.rut.util.algorithm.support.QuickSort; m$@CwQj
import org.rut.util.algorithm.support.SelectionSort; k]f73r
import org.rut.util.algorithm.support.ShellSort; sM?DNE^BvW
Y61E|:fV!
/** F." L{g
* @author treeroot $&a`zffG
* @since 2006-2-2 kV(?u_ R
* @version 1.0 SKcAZC
*/ q=[0`--cd
public class SortUtil { 0K#dWc}"a
public final static int INSERT = 1; iqOd]H]v
public final static int BUBBLE = 2; rH-_L&
public final static int SELECTION = 3; kkd<CEz2IM
public final static int SHELL = 4; xX|-5cM;
public final static int QUICK = 5; Jwa2Y0
public final static int IMPROVED_QUICK = 6; sq<y2j1oF
public final static int MERGE = 7; }*BY!5
public final static int IMPROVED_MERGE = 8; ;{Ovqo|
public final static int HEAP = 9; BF]b\/I
cuSXv)
public static void sort(int[] data) { A#8/:t1AW
sort(data, IMPROVED_QUICK); 'etCIl3
} xNm<` Y?
private static String[] name={ +'lfW{E1t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z6Mf>q
}; $ Q2|{*
kM9E)uT>(<
private static Sort[] impl=new Sort[]{ vWj|[| <rX
new InsertSort(), ?[T&y ,ln
new BubbleSort(), I[F.M}5:z
new SelectionSort(), uvm=i .
new ShellSort(), | @mZ]`p
new QuickSort(), ap=M$9L'
new ImprovedQuickSort(), gbSZ- ej
new MergeSort(), wk-ziw
new ImprovedMergeSort(), 8E$KR:/:4
new HeapSort() A4SM@ry
}; O #0:6QX
UQhfR}(
public static String toString(int algorithm){ z{tyB
return name[algorithm-1]; .c BJA&/
} pX2 Ki^)]
a{H~>d<?
public static void sort(int[] data, int algorithm) { o3uv"# C
impl[algorithm-1].sort(data); 2I#fwsb
} ]huqZI
"lUw{3
public static interface Sort { ? ZN8Ku
public void sort(int[] data); J6f;dF^
} ~j8x"
ph3[}><6
public static void swap(int[] data, int i, int j) { D5U\~'{L
int temp = data; ogQbST
data = data[j]; 4}=]QQoE
data[j] = temp; thUs%F.5?
} [81k4kU
} Uu3[Cf=C