[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; w#PZu+
} |U[y_Y\a
int i1=l; U2*6}c<
int i2=mid+1; `0BdMKjA
for(int cur=l;cur<=r;cur++){ SA6hbcYk
if(i1==mid+1) FyD.>ot7M
data[cur]=temp[i2++]; @%i>XAe#0
else if(i2>r) (0*v*kYdL+
data[cur]=temp[i1++]; nYv#4*
else if(temp[i1] data[cur]=temp[i1++]; ^6/j_G
else i%(yk#=V
data[cur]=temp[i2++]; `rWB`q|i<
} (b/d0HCND
} MM#cLw
` DCU>bt&R
} PNF4>)
AvRcS]@=
改进后的归并排序: Pw}_[[>$
[J\DB)V/
package org.rut.util.algorithm.support; +h[e0J|v{
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import org.rut.util.algorithm.SortUtil; L@|#Bbmx
y{rn-?`{
/** $"fo^?d/s
* @author treeroot @vH2Vydu
* @since 2006-2-2 \v`#|lT$
* @version 1.0 ^/KfH&E
*/ ';lfS
public class ImprovedMergeSort implements SortUtil.Sort { .A<sr
+802`eax
private static final int THRESHOLD = 10; iV)ac\
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/* 6zYaA
* (non-Javadoc) (:?&G9k "
* .K9l*-e[=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cqQRU
*/ GfsBQY/
public void sort(int[] data) { *m_93J
int[] temp=new int[data.length]; Fn,k!q
mergeSort(data,temp,0,data.length-1); vnsSy33K
} (DJvi6\H
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private void mergeSort(int[] data, int[] temp, int l, int r) { 4]6Qr
int i, j, k; &G{2s J5{
int mid = (l + r) / 2; {;RF
if (l == r) ^tE_LL+ji|
return; ZH-5Qy_
if ((mid - l) >= THRESHOLD) *caLN,G
mergeSort(data, temp, l, mid); M'u=H
else ,RK3eQ
insertSort(data, l, mid - l + 1); ?vu|o'$T,
if ((r - mid) > THRESHOLD) _^;;i4VZ
mergeSort(data, temp, mid + 1, r); KSOO?X0j
else u(9X
insertSort(data, mid + 1, r - mid); UD*+"~
]V<"(?,K
for (i = l; i <= mid; i++) { :o\5K2]:
temp = data; 4;\Y?M}g?
} UvD-C?u'
for (j = 1; j <= r - mid; j++) { G]lvHD
temp[r - j + 1] = data[j + mid]; :ej_D}
} AP@<r
int a = temp[l]; 3i(Jon/p
int b = temp[r]; A70(W{6a9@
for (i = l, j = r, k = l; k <= r; k++) { _<u;4RO(s
if (a < b) { >-<F)
data[k] = temp[i++]; Yq0# #__
a = temp; 5+FLSk
} else { $I(}r3r
data[k] = temp[j--]; ;C_ >
b = temp[j]; @KJV1t`
} ?>)yKa#U
} /| f[us-w
} uo 4xnzc
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/** ]^!}*
* @param data T&4fBMBp,%
* @param l j)Lo'&Y~=
* @param i ;@!;1KDy
*/ VKf6|ae
private void insertSort(int[] data, int start, int len) { #01/(:7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #ko6L3Pi
} sy.:T]ZH
} cKpQr7]ur
} AY@k-4
} @H4wHlb
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堆排序： EP0a1.C
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package org.rut.util.algorithm.support; )]}$
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import org.rut.util.algorithm.SortUtil; ER2V*,n@
7V/Zr
/** I}ndRDz[
* @author treeroot .pKN4
* @since 2006-2-2 &z QWIv
* @version 1.0 l]u7.~b
*/ +Z$a1Y@
public class HeapSort implements SortUtil.Sort{ cE2Rr
DCK_F8
/* (non-Javadoc) rT<1S?jR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `r9^:TMN
*/ CwB] )QV?
public void sort(int[] data) { (ic@3:xR
MaxHeap h=new MaxHeap(); EGEMZCdk2
h.init(data); `=v@i9cTZ
for(int i=0;i h.remove(); DZ%8 |PmB
System.arraycopy(h.queue,1,data,0,data.length); 5IO3 %p?
} mVHFT~x7}
.Map
private static class MaxHeap{ K_FBy
a^x 0 l
void init(int[] data){ ja:\W\xhJ
this.queue=new int[data.length+1]; ME,duY/>Q
for(int i=0;i queue[++size]=data; 8ur_/h7
fixUp(size); uAQg"j
} 3m~U(yho
} (Y>U6
X;5S
private int size=0; vS2(Q0+TZi
rSbQ}O4V
private int[] queue; >["Kd.ye
fW[_+r]
public int get() { ?Cc$]
return queue[1]; [@zkv)D6
} )Jmw|B
8vu2k>
public void remove() { vo.EM1x
SortUtil.swap(queue,1,size--); hOV_Oqe4?
fixDown(1); 1k`|[l^
} @}Pw0vC
file://fixdown s?HsUD$b
private void fixDown(int k) { r@;$V_I
int j; '2j~WUEmg
while ((j = k << 1) <= size) { sgR 9d
if (j < size %26amp;%26amp; queue[j] j++; zEAx:6`c
if (queue[k]>queue[j]) file://不用交换 4bWfx_0W
break; }el,^~
SortUtil.swap(queue,j,k); &4[<F"W>47
k = j; `c>A>c|
} Aw5K3@Ltz
} J511AoQ{R
private void fixUp(int k) { x[Hhj'
while (k > 1) { ;Xz(B4N~o
int j = k >> 1; YqkA&qL]#;
if (queue[j]>queue[k]) @RQ+JYQi
break; \?[O,A
SortUtil.swap(queue,j,k); Jr|K>
k = j; YALyZ.d
} w:n(pLc<
} Un~]Q?w
z)r8?9u
} \gjl^#;
xMLrLXy
} bW}b<(y
ya;@<b
SortUtil： `AB~YX%(
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package org.rut.util.algorithm; L,tZh0
]U#JsMS
import org.rut.util.algorithm.support.BubbleSort; rE9Ta8j6
import org.rut.util.algorithm.support.HeapSort; .Ydr[
import org.rut.util.algorithm.support.ImprovedMergeSort; @<0h"i x
import org.rut.util.algorithm.support.ImprovedQuickSort; $HP/cKu
import org.rut.util.algorithm.support.InsertSort; `NTM%# w
import org.rut.util.algorithm.support.MergeSort; Z^6A_:]j
import org.rut.util.algorithm.support.QuickSort; f;&` 9s| 1
import org.rut.util.algorithm.support.SelectionSort; Au~+Zz|mQ
import org.rut.util.algorithm.support.ShellSort; A3m{jbh
q|?`Gsr
/** 8|fLe\"
* @author treeroot D<lQoO+
* @since 2006-2-2 Cln^1N0
* @version 1.0 Zjw!In|vC
*/ 02;f2;I
public class SortUtil { {(8U8f<'=y
public final static int INSERT = 1; x;<oaT$X
public final static int BUBBLE = 2; <|ka{=T
public final static int SELECTION = 3; I3V{"Nx6
public final static int SHELL = 4; c8H9_6
public final static int QUICK = 5; 2(@LRl>:
public final static int IMPROVED_QUICK = 6; )*"T
public final static int MERGE = 7; +d|:s
public final static int IMPROVED_MERGE = 8; 3Pw%[q=g
public final static int HEAP = 9; 9;}L{yve
"TEBByO'
public static void sort(int[] data) { W9:fKP
sort(data, IMPROVED_QUICK); $K5ni{M;
} U&tfl/
private static String[] name={ yd\5Z[iEp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Krt$=:m|1
}; 7*R{u*/e
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private static Sort[] impl=new Sort[]{ aUsul'e;M
new InsertSort(), 7O;BS}Lv=
new BubbleSort(), 3'|Uqf8
new SelectionSort(), ]?v?Qfh2
new ShellSort(), ez{P-qB
new QuickSort(), Lg\8NtP
new ImprovedQuickSort(), #RCZA4>
new MergeSort(), gPF}aaB6
new ImprovedMergeSort(), Nv}U/$$S
new HeapSort() )*q7pO\cty
}; &<\4q
H8(0.IR
public static String toString(int algorithm){ we6+2
return name[algorithm-1]; (CKhY~,/u
} Vu_7uSp,)
My'9S2Y8nv
public static void sort(int[] data, int algorithm) { ^K1~eb*K
impl[algorithm-1].sort(data); 3:l:~Vn
} 5?#OR!N
jV(xYA3
public static interface Sort { 1R^XWAb
public void sort(int[] data); nsM>%+o
} ze#rYNvo/
bn^mL~
public static void swap(int[] data, int i, int j) { -N /8Ho
int temp = data; }.fZy&_
data = data[j]; "t3uW6&
data[j] = temp; tal>b]B;
} Gd]5xl HRU
} U]`'GM/x